Low-wear power-on test system of transformer production line

Abstract

The invention discloses a low-wear power-on test system for a transformer production line, which comprises a transformer transmission guide rail, a transformer chute is arranged on the transformer transmission guide rail along the length direction, and a manipulator can place a grabbed transformer with an upward metal pin column into a determined position in the transformer chute; a lifting beam is arranged above the transformer chute, the lower side of the lifting beam is at least provided with a group of conical surface guide plug-in type low-wear electrical connectors, and the conical surface guide plug-in type low-wear electrical connectors are electrically connected with a transformer power-on test device through flexible test wires; a physical process of establishing and releasing electrical connection is reconstructed, a traditional sliding friction contact mode is changed, and the order of magnitude of abrasion loss is reduced.

Description

Technical Field

[0001] The present invention belongs to the field of transformer production testing Background Art

[0002] In the final inspection phase of the transformer mass production line, in order to ensure that the electrical performance of each product meets the standards, each transformer must be subjected to a rigorous power-on test.

[0003] The core operation of this process is to insert the four precisely arranged metal pins on the bottom of the transformer into four dedicated electrical connection sockets on the inspection station one by one. These sockets are usually embedded with elastic metal contacts. When the pins are initially inserted, the contacts will tightly clamp the side walls of the pins. However, this seemingly simple insertion and removal action hides significant quality risks in the high-intensity, high-frequency mass production environment:

[0004] Plugging and unplugging wear: Whether it is the alignment process during insertion or the unplugging operation after completion of detection, the metal side wall of the pin will undergo continuous, high-stroke sliding friction with the elastic contact inside the socket; each plugging and unplugging is a tiny physical scratch.

[0005] In mass production, the same inspection station needs to continuously process hundreds or even thousands of transformers day after day; this means that the sockets will be plugged in and out repeatedly extremely frequently;

[0006] Consequences of a vicious cycle: This high-frequency mechanical friction quickly wears away the plating (such as gold or tin) and base metal material on the surface of the socket contacts. At the same time, the exposed fresh metal surface is easily oxidized in the air, forming a non-conductive or high-resistance oxide layer (such as verdigris). The dual effects of wear and oxidation directly lead to a significant increase in the contact resistance between the socket and the pin, and a sharp decrease in connection stability.

[0007] Fatal misjudgment: This unstable connection will introduce abnormal resistance fluctuations, voltage drops, or signal intermittence during power-on testing. The detection device cannot distinguish whether this is a connection problem or a true fault in the transformer itself. Therefore, it is very likely to misjudge a transformer that should have passed the test as defective, resulting in unnecessary rework or scrap, seriously affecting production efficiency and yield rate.

[0008] In addition, there are the following alignment problems during the insertion process:

[0009] On a high-speed assembly line, precisely aligning the four pins of a transformer with the four sockets simultaneously is a challenge in itself. The transformer pins may be slightly tilted or angularly misaligned due to manufacturing tolerances, minor vibrations during handling, or minor errors in robotic positioning. During the actual insertion moment, some pins may not be fully aligned and inserted into their corresponding sockets. Pins may scrape against the edge of the socket, not fully insert, or even be forced into the socket at an angle. Summary of the Invention

[0010] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a low-wear power-on test system for a transformer production line, which achieves low wear during the insertion and removal process.

[0011] Technical Solution: To achieve the above objectives, the present invention provides a low-wear power-on test system for a transformer production line, comprising a transformer transfer rail having a transformer chute disposed along its length. A manipulator can place a grasped transformer with its metal pins facing upward into a defined position within the chute. A lifting beam is disposed above the chute, and at least one set of tapered-guide plug-in low-wear electrical connectors is disposed below the lifting beam. The tapered-guide plug-in low-wear electrical connectors are electrically connected to a transformer power-on test device via flexible test leads.

[0012] When the transformer in the transformer chute is directly below the conical guide plug-in low-wear electrical connector, the descending action of the lifting beam can cause the conical guide plug-in low-wear electrical connector to be plugged and electrically connected to each metal pin post on the transformer, thereby allowing each flexible test wire to be electrically connected to each metal pin post one by one through the conical guide plug-in low-wear electrical connector.

[0013] Furthermore, it also includes a transformer translation card plate that can be horizontally displaced under the drive of the displacement device, and at least one transformer bayonet is provided on a side of the transformer translation card plate close to the transformer slide slot;

[0014] By translating the transformer translation card plate, the transformer bayonet is moved to the upper part of the transformer core in the transformer slide slot, and then on this basis, the transformer translation card plate is translated to drive the transformer to slide to another determined position along the extension direction of the transformer slide slot.

[0015] Furthermore, the conical surface guided plug-in low-wear electrical connector includes four conical trumpet-shaped pin post guiding insulating cones distributed in a horizontal array, the guiding cone mouth of the thick end of the pin post guiding insulating cone is facing downward, and any two adjacent pin post guiding insulating cones are connected as a whole through a horizontal connecting piece; a horizontal insulating beam is arranged directly above the integrated structure formed by the four pin post guiding insulating cones through the horizontal connecting piece, the horizontal insulating beam is connected as a whole with the horizontal connecting piece through a vertical connecting piece, and the upper side of the horizontal insulating beam is fixedly connected to the lifting beam through a bracket piece.

[0016] Furthermore, the inner diameter of the upper end of the guide cone is just large enough for the metal pin to pass through.

[0017] Furthermore, each pin column guides the upper end of the insulating cone cylinder coaxially with an insulating top cap, the lower side of the insulating top cap is a top groove, the upper side of the insulating top cap is coaxially fixedly connected to a guide rod, and the upper end of the guide rod moves upward through the guide hole on the horizontal insulating beam;

[0018] There is a horizontal conductive beam above each guide rod, which is perpendicular to the horizontal insulating beam. The horizontal conductive beam is electrically connected to the corresponding flexible test wire, and the two ends of the horizontal conductive beam are fixedly connected to the insulating top cap through a pair of insulating oblique beams; two arc-shaped conductive claws are symmetrically arranged on both sides of the upper part of the pin column guiding the insulating cone. In the initial state, the conductive claws do not contact the outer circumference of the pin column guiding the insulating cone; the outer arc surface of the conductive claws is fixedly connected to a metal spring extending in an upward arc and a roller arm extending in a downward arc; the upper end of the metal spring is electrically connected to the horizontal conductive beam; a pair of rollers are rotatably arranged at the lower end of the roller arm, and the pair of rollers are both in rolling cooperation with the outer cone surface of the pin column guiding the insulating cone.

[0019] Furthermore, two roller constraint ridges are provided on both sides of the outer peripheral surfaces of the pin column guiding the insulating cone along the busbar extension direction, so that a roller constraint ridge is clamped between a pair of rollers, so that the rollers can only roll along the busbar extension direction of the outer conical surface of the pin column guiding the insulating cone.

[0020] Furthermore, in the initial state, the metal spring is in an elastic deformation state and stores elastic potential energy. The elastic restoring force of the stored elastic potential energy causes the lower end of the metal spring to tend to swing toward the axis of the pin column guiding the insulating cone. At the same time, the elastic restoring force of the metal spring is transmitted through the roller arm as a rolling force between the roller and the outer conical surface of the pin column guiding the insulating cone.

[0021] The guide rod is outer-mounted with a spring, which is located between the horizontal insulating beam and the insulating top cap. In the initial state, the downward thrust of the spring on the insulating top cap offsets the upward component of the reaction force exerted by the outer cone surface of the pin-guided insulating cone on each roller;

[0022] During the upward movement of the integrated structure composed of the insulating top cap, insulating oblique beam, transverse conductive beam, guide rod, metal spring, conductive claw, roller arm and roller, each roller rolls upward along the extension direction of the busbar of the outer cone surface of the insulating cone cylinder guided by the pin column, so that the metal spring performs an inward elastic recovery action under the guidance of the busbar of the outer cone surface of the insulating cone cylinder guided by the pin column, so that the two conductive claws also perform an approaching and clasping action during the rising process.

[0023] Furthermore, the insulating cap is displaced upward relative to the pin post guiding insulating cone cylinder under the upward push of the conductive pin, thereby separating the insulating cap from the upper end of the pin post guiding insulating cone cylinder. At this time, a section of the conductive pin between the lower end of the insulating cap and the upper end of the pin post guiding insulating cone cylinder is exposed.

[0024] During the relative rising process of the insulating top cap, the metal spring performs an inward elastic recovery action under the guidance of the busbar of the outer cone surface of the pin column guiding the insulating cone cylinder, so that the two conductive claws also perform an embracing action approaching each other during the rising process; until the two conductive claws, under the action of the elastic recovery force of the metal spring, embrace a section of the conductive pin between the lower end of the insulating top cap and the upper end of the pin column guiding the insulating cone cylinder, so that the two conductive claws are reliably electrically connected to the embraced conductive pin in an embracing state.

[0025] Beneficial effects: The present invention reconstructs the physical process of establishing and releasing electrical connections, changes the traditional sliding friction contact mode, and achieves an order of magnitude reduction in wear:

[0026] Significant reduction in wear during insertion:

[0027] During the insertion of the conductive pin, the inner wall surface of the claw and the side wall of the pin always maintain a non-contact state.

[0028] Only when the pin reaches the preset depth position (i.e. the last moment of the insertion process) can the inner wall surface of the claw reliably form a tight, large contact area electrical connection with the side wall of the pin.

[0029] Compared with traditional methods: In traditional sockets, the pins and spring contacts are in a state of continuous, long-distance sliding friction throughout the entire insertion path; this design almost completely eliminates this process, and only an instantaneous, static crimping contact occurs at the final insertion point, compressing the path length and duration of insertion friction to almost zero, thereby fundamentally and significantly reducing insertion wear.

[0030] The wear during the extraction process is greatly reduced:

[0031] When the detection is completed and the pin needs to be pulled out, the inner wall of the claw releases the clamping force on the pin at the initial stage of the pulling force application (that is, the moment the pulling action starts); so that the two are in a non-contact or disengaged state during most of the actual removal stroke of the pin.

[0032] Compared to traditional methods: When removing a traditional socket, the pin must overcome the friction of the spring clamp, experiencing reverse, continuous sliding friction throughout the entire removal path. This design almost completely avoids this friction process, with only a very brief contact and separation action occurring at the initial moment of removal. This minimizes the path length and duration of the removal friction, thus significantly reducing removal wear.

[0033] Multiplier effect of comprehensive wear reduction:

[0034] The contact time and friction path are extremely minimized during the insertion and removal stages, which are originally the most wear-prone. The cumulative wear of the conductive claws and conductive pins during the entire insertion and removal cycle is exponentially reduced compared to the traditional sliding contact method. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall structure of "Step 1" to "Step 3" of this solution;

[0036] Figure 2 This is a schematic diagram of the overall structure of "Step 4" to "Step 8" of this solution;

[0037] Figure 3 for Figure 1 An enlarged schematic diagram of the mark 8;

[0038] Figure 4 for Figure 3 A further enlarged structural diagram of the part;

[0039] Figure 5 for Figure 4 A further enlarged structural diagram of the part;

[0040] Figure 6 Schematic diagram of two states in the insertion process from "step three" to "step four";

[0041] Figure 7 This is a schematic diagram of an integrated structure consisting of an insulating top cap, insulating oblique beams, transverse conductive beams, guide rods, metal shrapnel, conductive claws, roller arms, and rollers. DETAILED DESCRIPTION

[0042] The present invention will be further described below with reference to the accompanying drawings.

[0043] As attached Figures 1 to 7The low-wear power-on test system for the transformer production line is described. The transformer of this scheme is an EI transformer. The four conductive pins 12 of the transformer 7 include two connected to the two ends of the primary flexible group and two connected to the two ends of the secondary flexible group; the test principle is: the four conductive pins 12 of the transformer 7 include two connected to the two ends of the primary flexible group and two connected to the two ends of the secondary flexible group; during the test, the AC test power supply is stably electrically connected to the two conductive pins 12 at both ends of the primary flexible group of the transformer 7 through two flexible test wires 2, so that the primary flexible group of the transformer 7 is passed with AC power at a standard voltage. At the same time, the input end of the detection circuit of the test system is stably electrically connected to the two conductive pins 12 at both ends of the secondary flexible group of the transformer 7 through another two flexible test wires 2. If the voltage, current and load on the detection circuit are all within the normal fluctuation range, it is judged to be qualified, otherwise it is unqualified.

[0044] like Figure 1 and 2 As shown, it includes a transformer transmission rail 6, and a transformer slide 4 is provided on the transformer transmission rail 6 along the length direction. The groove width of the transformer slide 4 is consistent with the width of the iron core of the transformer 7. The manipulator can accurately and flatly place the grabbed transformer 7 with the metal pin column 12 facing upward into a determined position in the transformer slide 4. The upper end of the iron core of the transformer 7 placed in the transformer slide 4 just protrudes upward from the upper end of the transformer slide 4.

[0045] A lifting beam 3 is provided directly above the transformer chute 4, and at least one set of conical surface guided plug-in low-wear electrical connectors 5 is provided on the lower side of the lifting beam 3. The conical surface guided plug-in low-wear electrical connectors 5 are electrically connected to the transformer power-on test device through a flexible test wire 2.

[0046] When the transformer 7 in the transformer chute 4 is directly below the tapered guide plug-in low-wear electrical connector 5, the descending action of the lifting beam 3 enables the tapered guide plug-in low-wear electrical connector 5 to be plugged and electrically connected to the metal pins 12 on the transformer 7, thereby allowing each flexible test lead 2 to be electrically connected to each metal pin 12 in a one-to-one correspondence through the tapered guide plug-in low-wear electrical connector 5 with high quality.

[0047] It also includes a transformer translation card plate 1 that can be horizontally displaced under the drive of the displacement device. The transformer translation card plate 1 is provided with at least one transformer bayonet 13 on the side close to the transformer slide 4. In this solution, there are three transformer bayonet 13, and the width of the transformer bayonet 13 is consistent with the width of the iron core of the transformer 7; by translating the transformer translation card plate 1, the transformer bayonet 13 is displaced to the upper part of the iron core of the transformer 7 in the transformer slide 4, and on this basis, by translating the transformer translation card plate 1, the transformer 7 is driven to slide to another determined position along the extension direction of the transformer slide 4.

[0048] like Figures 3 to 7 As shown, the conical surface guided plug-in low-wear electrical connector 5 includes four conical trumpet-shaped pin post guiding insulating cones 9 distributed in a transverse array, the guiding cone mouth 41 of the thick end of the pin post guiding insulating cone 9 faces downward, and any two adjacent pin post guiding insulating cones 9 are integrally connected through a transverse connector 17; a horizontal insulating beam 14 is arranged directly above the integrated structure formed by the four pin post guiding insulating cones 9 through the transverse connector 17, and the horizontal insulating beam 14 is integrally connected to the transverse connector 17 through a vertical connector 16, and the upper side of the horizontal insulating beam 14 is fixedly connected to the lifting beam 3 through a bracket 10.

[0049] The inner diameter of the upper end of the guide cone 41 is just large enough for the metal pin 12 to pass through.

[0050] The upper end of each pin column guiding insulating cone 9 is coaxially covered with an insulating top cap 28, the lower side of the insulating top cap 28 is a top groove 27, and the upper side of the insulating top cap 28 is coaxially fixedly connected to a guide rod 21, the upper end of the guide rod 21 moves upward through the guide hole 20 on the horizontal insulating beam 14; each guide rod 21 is provided with a transverse conductive beam 22 above, the transverse conductive beam 22 is perpendicular to the upper side of the horizontal insulating beam 14, and the transverse conductive beam 22 is electrically connected to the corresponding flexible test wire 2, and the two ends of the transverse conductive beam 22 are fixedly connected to the insulating top cap 28 through a pair of insulating oblique beams 19;

[0051] Two arc-shaped conductive claws 18 are symmetrically provided on both sides of the upper portion of the pin post guiding insulating cone 9. In the initial state, the conductive claws 18 do not contact the outer circumference of the pin post guiding insulating cone 9. The inner diameter of the inner arc surface of the two conductive claws 18 on the side close to each other is consistent with the outer diameter of the metal pin post 12.

[0052] The outer arc surface of each conductive claw 18 is fixedly connected with a metal spring 23 extending in an upward arc and a roller arm 24 extending in a downward arc.

[0053] The metal spring 23 is a metal elastic member made of phosphor bronze, such as C5191 or C5210. It has excellent electrical conductivity and fatigue resistance, and its elasticity is significantly superior to that of ordinary copper alloys. The roller arm 24 is a hard, low-elastic member, such as high-carbon steel. The conductive claw 18 is made of a copper alloy, with its inner surface plated with gold or silver. Other insulating materials in this solution can be selected from hard plastics or ceramics, depending on the actual situation.

[0054] The upper end of the metal spring 23 is electrically connected to the transverse conductive beam 22; a pair of rollers 25 are rotatably provided at the lower end of the roller arm 24, specifically, a transverse wheel shaft 31 is fixed at the end of the roller arm 24, and both ends of the wheel shaft 31 are rotatably matched with the pair of rollers 25 through bearings; the axis of the roller 25 is horizontal, and the pair of rollers 25 are both rollingly matched with the outer conical surface of the pin column guiding the insulating cone 9, and the outer peripheral surfaces of both sides of the pin column guiding the insulating cone 9 are provided with two roller constraint ridges 26 along the busbar extension direction, so that there is a roller constraint ridge 26 between any pair of rollers 25, so that the roller 25 can only roll along the busbar extension direction of the outer conical surface of the pin column guiding the insulating cone 9.

[0055] In the initial state, if Figure 6 In the above figure, the metal spring 23 is in an elastic deformation state and stores elastic potential energy. The elastic restoring force of the stored elastic potential energy causes the lower end of the metal spring 23 to tend to swing toward the side of the axis of the pin column guiding the insulating cone 9. At the same time, the elastic restoring force of the metal spring 23 is transmitted through the roller arm 24 as a rolling force between the roller 25 and the outer cone surface of the pin column guiding the insulating cone 9; the guide rod 21 is outer-circuited with a spring 29, and the spring 29 is between the horizontal insulating beam 14 and the insulating top cap 28. In the initial state, the downward thrust of the spring 29 on the insulating top cap 28 offsets the upward component of the reaction force applied by the outer cone surface of the pin column guiding the insulating cone 9 to each roller 25.

[0056] like Figure 6 In the lower figure, during the upward movement of the integrated structure composed of the insulating top cap 28, the insulating oblique beam 19, the transverse conductive beam 22, the guide rod 21, the metal spring 23, the conductive claw 18, the roller arm 24 and the roller 25, each roller 25 rolls upward along the extension direction of the busbar of the outer conical surface of the insulating cone 9 guided by the pin column, so that the metal spring 23 performs an elastic recovery action inward under the guidance of the busbar of the outer conical surface of the insulating cone 9 guided by the pin column, so that the two conductive claws 18 also perform an embracing action approaching each other during the upward process.

[0057] Working principle:

[0058] In step 1, the robot arm accurately places the transformer 7 with the metal pin 12 facing upward into a predetermined position in the transformer chute 4 .

[0059] Step 2: By translating the transformer translation clamping plate 1, the transformer clamping port 13 is moved to the upper part of the iron core of the transformer 7 in the transformer chute 4.

[0060] Step three: by translating the transformer translation clamping plate 1, drive the clamped transformers 7 to slide along the extension direction of the transformer slide slot 4 until each transformer 7 corresponds to the bottom of each cone-guided plug-in low-wear electrical connector 5. At this time, the four upward conductive pins 12 on the transformer 7 correspond to the four pin column guiding insulating cones 9 of the cone-guided plug-in low-wear electrical connector 5 directly above.

[0061] Step 4: Control the lifting beam 3 to descend, so that the tapered surface guides the plug-in low-wear electrical connector 5 to descend as a whole.

[0062] From the perspective of relative movement, the tapered surface guided plug-in low-wear electrical connector 5 as a whole is considered to be relatively stationary, and the four upwardly facing conductive pins 12 on the transformer 7 perform a relatively upward insertion motion.

[0063] During the process of the conductive pin 12 being inserted relatively upward into the guide cone opening 41 of the corresponding pin column guiding insulating cone cylinder 9, the inner cone surface of the guide cone opening 41 guides the inserted conductive pin 12. Even if the conductive pin 12 is slightly deflected, the upper end of the conductive pin 12 can smoothly pass through the upper end of the guide cone opening 41. Then, the conductive pin 12 that has passed through the upper end of the guide cone opening 41 relatively upward continues to push the insulating top cap 28 relatively upward, so that the insulating top cap 28 is shifted upward relative to the pin column guiding insulating cone cylinder 9 under the upward push of the conductive pin 12, and then the insulating top cap 28 is separated from the upper end of the pin column guiding insulating cone cylinder 9. At this time, a section of the conductive pin 12 between the lower end of the insulating top cap 28 and the upper end of the pin column guiding insulating cone cylinder 9 is exposed.

[0064] During the process of the insulating top cap 28 guiding the insulating cone 9 to rise relative to the pin post, the integrated structure composed of the insulating top cap 28, the insulating oblique beam 19, the transverse conductive beam 22, the guide rod 21, the metal spring 23, the conductive claw 18, the roller arm 24 and the roller 25 jointly guides the insulating cone 9 to rise relative to the pin post, so that each roller 25 rolls upward along the extension direction of the busbar of the outer cone surface of the insulating cone 9 guided by the pin post, so that the metal spring 23 performs an elastic recovery action inward under the guidance of the busbar of the outer cone surface of the insulating cone 9 guided by the pin post, so that the two conductive claws 18 also perform an embracing action approaching each other during the rising process; until the two conductive claws 18, under the action of the elastic recovery force of the metal spring 23, embrace a section of the conductive pin 12 between the lower end of the insulating top cap 28 and the upper end of the insulating cone 9 guided by the pin post, so that the two conductive claws 18 are reliably electrically connected to the embraced conductive pin 12 in an embracing state.

[0065] As a result, the four conductive pins 12 on the upper portion of the transformer 7 are electrically connected to their respective flexible test leads 2 one by one through the tapered surface-guided plug-in low-wear electrical connector 5. In this step, the encircling electrical connection method ensures that the inner surface of the conductive claw 18 and the conductive pins 12 only achieve close contact at the last moment of the insertion process, significantly reducing wear compared to the traditional sliding insertion method.

[0066] In this case, during the insertion process of the conductive pin 12, the inner wall surface of the claw always remains in a non-contact state with the side wall of the pin; only when the pin completely reaches the preset depth position, that is, at the last moment of the insertion process, the inner wall surface of the claw reliably forms a tight and large contact area electrical connection with the side wall of the pin.

[0067] Compared to traditional methods: Traditional sockets experience continuous, long-distance sliding friction between the pin and the spring contact throughout the entire insertion path. This design, however, almost completely eliminates this process, with only a single, instantaneous, static crimping contact occurring at the final insertion point. This reduces the path length and duration of insertion friction to near zero, thereby radically and significantly reducing insertion wear.

[0068] Step 5: At this time, the power-on detection device performs power-on detection on the electrically connected transformer 7 through the flexible test wire 2;

[0069] Test principle: The four conductive pins 12 of the transformer 7 include two connected to the two ends of the primary flexible group and two connected to the two ends of the secondary flexible group; during the test, the AC test power supply is stably electrically connected to the two conductive pins 12 at both ends of the primary flexible group of the transformer 7 through two flexible test wires 2, so that the primary flexible group of the transformer 7 is passed with AC power at a standard voltage. At the same time, the input end of the detection circuit of the test system is stably electrically connected to the two conductive pins 12 at both ends of the secondary flexible group of the transformer 7 through another two flexible test wires 2. If the voltage, current and load on the detection circuit are all within the normal fluctuation range, it is judged to be qualified, otherwise it is unqualified.

[0070] Step 6: After the test is completed, the lifting beam 3 is controlled to move upward, so that the tapered surface guides the plug-in low-wear electrical connector 5 to move upward as a whole;

[0071] From the perspective of relative motion, the tapered surface guided plug-in low-wear electrical connector 5 as a whole is considered relatively stationary, and the four upward-facing conductive pins 12 on the transformer 7 are pulled out relatively downward;

[0072] The process of relatively downwardly withdrawing the conductive pins 12 is the exact opposite of step five. After the four conductive pins 12 of the transformer 7 are relatively downwardly disengaged from the tapered surface-guided plug-in low-wear electrical connector 5, the tapered surface-guided plug-in low-wear electrical connector 5 adaptively returns to its initial position. Similarly, during the relatively downward withdrawal of the conductive pins 12 in this step, the inner surface of the conductive claw 18 contacts the conductive pins 12 only at the moment of withdrawal, significantly reducing wear compared to conventional sliding withdrawal methods.

[0073] In this solution, at the initial stage of the extraction force application (i.e., the moment the extraction action begins), the inner wall surface of the claw releases the clamping force on the pin; so that during most of the actual removal stroke of the pin, the two are in a non-contact or disengaged state.

[0074] Compared to traditional methods: When removing a traditional socket, the pin must overcome the friction of the spring clamp, experiencing reverse, continuous sliding friction throughout the entire removal path. This design almost completely avoids this friction process, with only a very brief contact and separation action occurring at the initial moment of removal. This minimizes the path length and duration of the removal friction, thus significantly reducing removal wear.

[0075] Step 7: By translating the transformer translation clamping plate 1, the clamped transformers 7 that have been inspected are driven to slide along the extension direction of the transformer chute 4 until the transformers 7 that have been inspected slide to the position directly below the deviating lifting beam 3;

[0076] Step eight, then translate the transformer translation card plate 1 in a direction perpendicular to the extension direction of the transformer slide chute 4, so that the transformer translation card plate 1 is separated from each transformer 7, releasing the stuck column state of each transformer 7, and then taking away each transformer 7 by a robot.

[0077] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. Low-wear power-on test system for transformer production lines, characterized by: The invention comprises a transformer transmission rail (6), wherein a transformer chute (4) is provided on the transformer transmission rail (6) along the length direction, and a manipulator can place a transformer (7) with a metal pin column (12) facing upwards, which is grasped by the manipulator, into a certain position in the transformer chute (4); a lifting beam (3) is provided above the transformer chute (4), and at least one group of conical surface guided plug-in low-wear electrical connectors (5) is provided on the lower side of the lifting beam (3), and the conical surface guided plug-in low-wear electrical connectors (5) are electrically connected to the transformer power-on test device through a flexible test wire (2); When the transformer (7) in the transformer chute (4) corresponds to the position directly below the conical surface guided plug-in low-wear electrical connector (5), the descending action of the lifting beam (3) enables the conical surface guided plug-in low-wear electrical connector (5) to be plugged in and electrically connected to each metal pin column (12) on the transformer (7), thereby enabling each flexible test lead (2) to be electrically connected to each metal pin column (12) through the conical surface guided plug-in low-wear electrical connector (5).

2. The low-wear power-on test system for a transformer production line according to claim 1, characterized in that: It also includes a transformer translation card plate (1) capable of horizontal displacement under the drive of the displacement device, wherein the transformer translation card plate (1) is provided with at least one transformer bayonet (13) on a side close to the transformer chute (4); By translating the transformer translation clamping plate (1), the transformer clamping port (13) is displaced to the upper portion of the iron core of the transformer (7) in the transformer chute (4) and then, on this basis, by translating the transformer translation clamping plate (1), the transformer (7) is driven to slide to another determined position along the extension direction of the transformer chute (4).

3. The low-wear power-on test system for a transformer production line according to claim 1, characterized in that: The conical surface guided plug-in low-wear electrical connector (5) comprises four conical trumpet-shaped pin column guiding insulating cones (9) distributed in a transverse array, the guiding cone openings (41) of the thick ends of the pin column guiding insulating cones (9) face downward, and any two adjacent pin column guiding insulating cones (9) are integrally connected via a transverse connecting piece (17); a horizontal insulating beam (14) is arranged directly above the integral structure formed by the four pin column guiding insulating cones (9) via the transverse connecting piece (17), the horizontal insulating beam (14) is integrally connected to the transverse connecting piece (17) via a vertical connecting piece (16), and the upper side of the horizontal insulating beam (14) is fixedly connected to the lifting beam (3) via a bracket piece (10).

4. The low-wear power-on test system for a transformer production line according to claim 3, characterized in that: The inner diameter of the upper end of the guide cone (41) is just large enough for the metal pin (12) to pass through.

5. The low-wear power-on test system for a transformer production line according to claim 4, characterized in that: The upper end coaxially covers the insulating cone cylinders (9) guided by the pins, and are provided with insulating top caps (28). The lower side of the insulating top caps (28) is a top groove (27). The upper side of the insulating top caps (28) is coaxially fixedly connected with a guide rod (21). The upper end of the guide rod (21) moves upward and passes through the guide hole (20) on the horizontal insulating beam (14). Each guide rod (21) is provided with a transverse conductive beam (22) above, the transverse conductive beam (22) being perpendicular to the horizontal insulating beam (14) above, the transverse conductive beam (22) being electrically connected to the corresponding flexible test wire (2), the two ends of the transverse conductive beam (22) being fixedly connected to the insulating top cap (28) through a pair of insulating oblique beams (19); two arc-shaped conductive claws (18) are symmetrically arranged on both sides of the upper part of the pin column guiding the insulating cone (9), and in the initial state, the conductive claws (18) are symmetrically arranged on both sides of the upper part of the pin column guiding the insulating cone (9). The electric clamping claw (18) does not contact the outer peripheral surface of the pin column guiding insulating cone (9); the outer arc surface of the conductive clamping claw (18) is fixedly connected to a metal spring (23) extending in an upward arc and a roller arm (24) extending in a downward arc; the upper end of the metal spring (23) is electrically connected to the transverse conductive beam (22); the lower end of the roller arm (24) is rotatably provided with a pair of rollers (25), and the pair of rollers (25) are both in rolling cooperation with the outer conical surface of the pin column guiding insulating cone (9).

6. The low-wear power-on test system for a transformer production line according to claim 5, characterized in that: Two roller restraining convex strips (26) are provided on both sides of the outer peripheral surface of the pin column guiding insulating cone (9) along the busbar extension direction, so that a roller restraining convex strip (26) is sandwiched between a pair of rollers (25), so that the rollers (25) can only roll along the busbar extension direction of the outer conical surface of the pin column guiding insulating cone (9).

7. The low-wear power-on test system for a transformer production line according to claim 6, characterized in that: In the initial state, the metal spring (23) is in an elastic deformation state and stores elastic potential energy. The elastic restoring force of the stored elastic potential energy causes the lower end of the metal spring (23) to have a tendency to swing toward the axis of the pin column guiding insulating cone (9). At the same time, the elastic restoring force of the metal spring (23) is transmitted through the roller arm (24) to form a rolling force between the roller (25) and the outer conical surface of the pin column guiding insulating cone (9). The guide rod (21) is provided with a spring (29) on its outer sleeve. The spring (29) is located between the horizontal insulating beam (14) and the insulating top cap (28). In the initial state, the downward thrust of the spring (29) on the insulating top cap (28) offsets the upward component of the reaction force applied by the outer conical surface of the pin column guiding the insulating cone (9) to each roller (25). During the upward movement of the integrated structure composed of the insulating top cap (28), the insulating oblique beam (19), the transverse conductive beam (22), the guide rod (21), the metal spring (23), the conductive claw (18), the roller arm (24) and the roller (25), each roller (25) rolls upward along the direction of extension of the busbar of the outer conical surface of the pin column guiding the insulating cone (9), so that the metal spring (23) performs an elastic recovery action inward under the guidance of the busbar of the outer conical surface of the pin column guiding the insulating cone (9), so that the two conductive claws (18) also perform an embracing action of approaching each other during the upward movement.

8. The low-wear power-on test system for a transformer production line according to claim 7, characterized in that: The insulating top cap (28) is displaced upward relative to the pin column guiding insulating cone (9) when the conductive pin (12) is pushed upward, thereby separating the insulating top cap (28) from the upper end of the pin column guiding insulating cone (9), and at this time, a section of the conductive pin (12) between the lower end of the insulating top cap (28) and the upper end of the pin column guiding insulating cone (9) is exposed; During the relative ascent of the insulating top cap (28), the metal spring (23) performs an inward elastic recovery action under the guidance of the busbar of the outer cone surface of the pin column guiding insulating cone (9), so that the two conductive claws (18) also perform an embracing action approaching each other during the ascent; until the two conductive claws (18) encircle a section of the conductive pin (12) between the lower end of the insulating top cap (28) and the upper end of the pin column guiding insulating cone (9) inward under the action of the elastic recovery force of the metal spring (23), so that the two conductive claws (18) are reliably electrically connected to the enclosed conductive pin (12) in an encircling state.

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