Connection device

Abstract

The invention discloses a connection device, and relates to the technical field of electric energy meter detection, the connection device comprises a three-phase probe plate, a single-phase probe plate, a meter connection seat and a driving assembly, the connection device has a three-phase inductive connection state, a three-phase direct connection state and a single-phase connection state, when the distance is switched to the first distance, the first detection column contracts, and the three-phase probe plate extends out; in the three-phase direct connection state, the spacing is switched to the second spacing, the second detection column contracts, and the three-phase probe plate extends out; and in the single-phase connection state, the spacing is switched to the third spacing, the second detection column and the third detection column are contracted, and the single-phase probe plate extends out. According to the technical scheme, the internal structure of the connection device is simplified, and miniaturization of the connection device is facilitated.

Description

Technical Field

[0001] This invention relates to the technical field of electricity meter testing, and particularly to a connection device. Background Technology

[0002] In the electricity metering industry, electricity meters are typically tested. Power companies and electricity meter manufacturers use automated testing lines to automatically test electricity meters. In automated electricity meter testing systems, to accommodate the testing needs of various devices such as three-phase direct-connection meters, three-phase inductive meters, and single-phase meters, traditional connection devices usually configure separate probe boards and drive structures for each type of device. While this discrete design achieves functional compatibility, it also results in a large number of probe boards, redundant drive units, complex overall structure, large space occupation, and high manufacturing costs. Furthermore, during state switching, multiple sets of probe boards need to be activated sequentially or the entire system needs to be replaced, affecting testing efficiency and system reliability. Summary of the Invention

[0003] The main objective of this invention is to provide a connection device that simplifies the internal structure of the connection device and facilitates its miniaturization.

[0004] To achieve the above objectives, the present invention provides a connection device comprising: Three-phase probe plate and single-phase probe plate; A meter holder includes a mounting plate, a meter receiving plate mounted on the mounting plate, and a plurality of detection columns mounted on the meter receiving plate, wherein the plurality of detection columns are spaced apart along a first direction; the detection columns include a first detection column, a second detection column, and a third detection column. A drive assembly, mounted on the mounting plate, includes a first drive assembly, a second drive assembly, a third drive assembly, a variable pitch drive assembly, a single-phase drive assembly, and a three-phase drive assembly. The first drive assembly, the second drive assembly, and the third drive assembly are respectively used to drive the first detection column, the second detection column, and the third detection column to extend and retract along a second direction; the second direction intersects the first direction; the variable pitch drive assembly is used to adjust the spacing of the plurality of detection columns in the first direction, so that at least some of the detection columns form a first spacing, a second spacing, and a third spacing; the single-phase drive assembly and the three-phase drive assembly are respectively used to drive the single-phase probe plate and the three-phase probe plate to extend and retract along the second direction. The connection device has three-phase inductive connection state, three-phase direct connection state, and single-phase connection state: In the three-phase inductive connection state, the spacing switches to the first spacing, the first detection column retracts, and the three-phase probe plate extends; In the three-phase direct connection state, the spacing switches to the second spacing, the second detection column retracts, and the three-phase probe plate extends; In the single-phase connection state, the spacing switches to the third spacing, the second and third detection columns retract, and the single-phase probe plate extends.

[0005] In one embodiment, the connection device further has a third direction, which intersects with the plane containing the second direction and the first direction. The mounting plate is provided with a meter connection groove, a single-phase groove and a three-phase groove stacked sequentially along the third direction. The meter connection plate, the single-phase probe plate and the three-phase probe plate are respectively slidably connected to the meter connection groove, the single-phase groove and the three-phase groove in sequence.

[0006] In one embodiment, the detection column is provided with a pitch-changing protrusion, and one pitch-changing protrusion corresponds to at least one detection column. The dial indicator plate is provided with a pitch-changing groove, and at least a portion of the pitch-changing groove extends in a direction that intersects the second direction and the first direction. The pitch-changing drive assembly drives the dial indicator plate to extend and retract along the second direction so that the pitch-changing protrusion slides in the pitch-changing groove to adjust the spacing of the detection columns.

[0007] In one embodiment, the variable pitch slot includes a first variable pitch slot and a second variable pitch slot, and at least one of the first variable pitch slots and the second variable pitch slots have different extension directions, so that the spacing of the detection column switches between the first spacing, the second spacing and the third spacing.

[0008] In one embodiment, the three-phase drive assembly, the single-phase drive assembly, the first drive assembly, the second drive assembly, the third drive assembly, and the variable-pitch drive assembly all include a drive motor and a transmission rod. The drive motor is mounted on the meter base, and one end of the transmission rod is connected to the output shaft of the drive motor.

[0009] In one embodiment, the connecting device further has a third direction, which intersects the plane containing the first direction and the second direction, and a plurality of the drive motors are stacked along the third direction.

[0010] In one embodiment, the single-phase probe board includes a single-phase board body and three single-phase probe groups, each mounted on the single-phase board body. Each of the three single-phase probe groups includes multiple single-phase probes for simultaneously connecting to three single-phase energy meters.

[0011] In one embodiment, the three-phase probe board includes a three-phase board body and two three-phase probe groups, each mounted on the three-phase board body. Each of the two three-phase probe groups includes multiple three-phase probes for simultaneously connecting two three-phase energy meters.

[0012] In one embodiment, the connection device further includes a base and a meter driving assembly. The mounting plate is slidably connected to the base, and the meter driving assembly is mounted on the base and drivenly connected to the mounting plate to drive the mounting plate to extend along the second direction so that the connection device can be plugged into the corresponding single-phase or three-phase energy meter.

[0013] In one embodiment, the base is provided with a first slide rail extending along the second direction, and the mounting plate is provided with a mounting groove. The mounting plate is slidably connected to the base through the first slide rail and the mounting groove.

[0014] The connection device in the technical solution of this invention includes a three-phase probe plate, a single-phase probe plate, a meter base, and a driving assembly. The connection device has three-phase inductive connection, three-phase direct connection, and single-phase connection states. When the connection device is in the three-phase inductive connection state, the variable-pitch driving assembly drives the detection column to move, adjusting the spacing of the detection column in the first direction to a first spacing. Simultaneously, the first driving assembly drives the first detection column to retract in the second direction, and the three-phase driving assembly drives the three-phase probe plate to extend in the second direction. When the connection device is in the three-phase direct connection state... The variable-pitch drive assembly moves the detection column to adjust the spacing of the detection column in the first direction to a second spacing. The second drive assembly retracts the second detection column in the second direction, and the three-phase drive assembly extends the three-phase probe plate in the second direction. When the connection device is in a single-phase connection state, the variable-pitch drive assembly moves the detection column to adjust the spacing of the detection column in the first direction to a third spacing. The second drive assembly retracts the second detection column in the second direction, the third drive assembly retracts the third detection column in the second direction, and the single-phase drive assembly extends the single-phase probe plate in the second direction. In this application, the variable-pitch drive assembly changes the spacing of the detection columns on the meter base, allowing the meter base to be used in three-phase inductive connection, three-phase direct connection, and single-phase connection states. This allows the connection device in this application to detect different types of energy meters by switching between different connection states, thereby improving the efficiency of the connection device and the detection efficiency. Furthermore, by using the same three-phase probe plate in both the three-phase direct connection state and the three-phase mutual inductance connection state of the connection device, compared with the existing technology that uses different types of probe plates for different connection states, this application reduces the number of probe plates and their corresponding driving components, thereby reducing the manufacturing cost of the connection device, simplifying the internal structure of the connection device, and facilitating the miniaturization of the connection device; at the same time, it also reduces the number of probe plates that need to be extended and retracted during the state switching process of the connection device, thereby improving the state switching efficiency and verification efficiency of the connection device. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the connection device provided by the present invention from one perspective; Figure 2 for Figure 1 A structural diagram from another perspective; Figure 3 for Figure 1 Top view in the middle; Figure 4 for Figure 1 An exploded view from a different perspective; Figure 5 for Figure 2 An exploded view from a different perspective; Figure 6 for Figure 1 Schematic diagram of the structure of the intermediate meter base; Figure 7 for Figure 1 A schematic diagram of the drive assembly mounted on the mounting plate; Figure 8 for Figure 7 Top view.

[0017] Explanation of icon numbers: 10. Three-phase probe plate; 11. Three-phase plate body; 12. Three-phase probe group; 13. First front positioning hole; 14. First rear positioning hole; 20. Single-phase probe plate; 21. Single-phase plate body; 22. Single-phase probe group; 23. Second front positioning hole; 24. Second rear positioning hole; 30. Meter mount; 31. Mounting plate; 311. Meter mount groove; 312. Single-phase groove; 313. Three-phase groove; 32. Meter mount; 321. Pitch groove; 321a. First pitch groove; 321b. 33. Variable pitch groove; 33. Detection column; 331. First detection column; 332. Second detection column; 333. Third detection column; 335. Variable pitch protrusion; 40a. Drive motor; 40b. Transmission rod; 41. First drive assembly; 42. Second drive assembly; 43. Third drive assembly; 44. Variable pitch drive assembly; 45. Single-phase drive assembly; 46. Three-phase drive assembly; 50. Locking structure; 51. Positioning rod; 61. Base; 62. First slide rail; 63. Meter connection drive assembly.

[0018] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

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

[0020] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0022] Reference Figure 1 ,and Figures 4 to 6 The present invention proposes a connection device, comprising: Three-phase probe plate 10 and single-phase probe plate 20; The meter holder 30 includes a mounting plate 31, a meter receiving plate 32 mounted on the mounting plate 31, and a plurality of detection columns 33 mounted on the meter receiving plate 32. The plurality of detection columns 33 are spaced apart along a first direction. The detection column 33 includes a first detection column 331, a second detection column 332, and a third detection column 333. A drive assembly, mounted on the mounting plate 31, includes a first drive assembly 41, a second drive assembly 42, a third drive assembly 43, a variable pitch drive assembly 44, a single-phase drive assembly 45, and a three-phase drive assembly 46. The first drive assembly 41, the second drive assembly 42, and the third drive assembly 43 are respectively used to drive the first detection post 331, the second detection post 332, and the third detection post 333 to extend and retract along a second direction; the second direction intersects with the first direction; the variable pitch drive assembly 44 is used to adjust the spacing of the plurality of detection posts 33 in the first direction, so that at least some of the detection posts 33 form a first spacing, a second spacing, and a third spacing; the single-phase drive assembly 45 and the three-phase drive assembly 46 are respectively used to drive the single-phase probe plate 20 and the three-phase probe plate 10 to extend and retract along the second direction; The connection device has three-phase inductive connection state, three-phase direct connection state, and single-phase connection state: In the three-phase inductive connection state, the spacing is switched to the first spacing, the first detection column 331 retracts, and the three-phase probe plate 10 extends; In the three-phase direct connection state, the spacing is switched to the second spacing, the second detection column 332 retracts, and the three-phase probe plate 10 extends; In the single-phase connection state, the spacing is switched to the third spacing, the second detection column 332 and the third detection column 333 retract, and the single-phase probe plate 20 extends.

[0023] The connection device in the technical solution of the present invention includes a three-phase probe plate 10, a single-phase probe plate 20, a meter base 30, and a driving assembly. The connection device has three-phase inductive connection, three-phase direct connection, and single-phase connection states. When the connection device is in the three-phase inductive connection state, the variable pitch driving assembly 44 drives the detection column 33 to move, adjusting the spacing of the detection column 33 in the first direction to a first spacing. Simultaneously, the first driving assembly 41 drives the first detection column 331 to retract along the second direction, and the three-phase driving assembly 46 drives the three-phase probe plate 10 to extend along the second direction. When the connection device is in the three-phase direct connection state, the variable pitch driving assembly 44... 4. Drive the detection column 33 to move, so as to adjust the spacing of the detection column 33 in the first direction to the second spacing. The second drive assembly 42 drives the second detection column 332 to retract in the second direction. The three-phase drive assembly 46 drives the three-phase probe plate 10 to extend in the second direction. When the connection device is in the single-phase connection state, the variable pitch drive assembly 44 drives the detection column 33 to move, so as to adjust the spacing of the detection column 33 in the first direction to the third spacing. The second drive assembly 42 drives the second detection column 332 to retract in the second direction. The third drive assembly 43 drives the third detection column 333 to retract in the second direction. The single-phase drive assembly 45 drives the single-phase probe plate 20 to extend in the second direction. In this application, the spacing of the detection columns 33 on the meter base 30 is changed by the variable pitch drive component 44, so that the meter base 30 can be used in three states: three-phase inductive connection, three-phase direct connection, and single-phase connection. In other words, the connection device in this application can detect different types of energy meters by switching between different connection states, thereby improving the efficiency of the connection device and the detection efficiency.

[0024] Furthermore, by using the same three-phase probe plate 10 in both the three-phase direct connection state and the three-phase mutual inductance connection state of the connection device, compared with the prior art solution which uses different types of probe plates for different connection states, this application reduces the number of probe plates and their corresponding driving components, thereby reducing the manufacturing cost of the connection device, simplifying the internal structure of the connection device, and facilitating the miniaturization of the connection device; at the same time, it also reduces the number of probe plates that need to be extended and retracted during the state switching process of the connection device, thereby improving the state switching efficiency and verification efficiency of the connection device.

[0025] Reference Figures 2 to 4 Furthermore, the connection device also has a third direction, which intersects with the plane containing the second direction and the first direction. The mounting plate 31 is provided with a meter connection groove 311, a single-phase groove 312, and a three-phase groove 313 stacked sequentially along the third direction. The meter connection plate 32, the single-phase probe plate 20, and the three-phase probe plate 10 are respectively slidably connected to the meter connection groove 311, the single-phase groove 312, and the three-phase groove 313. Compared with the prior art solution, which sets the slide rail and groove structure on the side of the meter connection plate 32, the single-phase probe plate 20, and the three-phase probe plate 10 facing each other, the technical solution of this application concentrates the groove structure on the mounting plate 31, so that the meter connection plate 32, the single-phase probe plate 20, and the three-phase probe plate 10 only need to cooperate with the mounting plate 31, reducing the number of parts, making the structure simpler, improving the overall rigidity, and facilitating assembly and debugging. Meanwhile, in existing technical solutions, the sliding between probe plates relies on their mutual cooperation, which can easily lead to movement jamming or displacement due to accumulated errors, uneven wear, or assembly deviations. In contrast, in the technical solution of this application, the meter connection plate 32, the single-phase probe plate 20, and the three-phase probe plate 10 move independently along the fixed grooves on the mounting plate 31. The movement trajectory is unique, the guidance is stable, there is no accumulated error, the positioning accuracy is higher, and the repeatability is better, thereby improving the insertion accuracy of the connection device and the energy meter and extending the service life of the connection device.

[0026] The first direction is the left-right direction when the connecting device is in the front view; the second direction is the front-back direction when the connecting device is in the front view; and the third direction is the up-down direction when the connecting device is in the front view, that is, the height direction.

[0027] It should be noted that the detection post 33 includes a current post and a voltage post. That is, the detection post 33 on the meter socket 30 is used to insert into the relevant current and voltage holes in the energy meter. The three-phase probe plate 10 and the single-phase probe plate 20 are respectively used to insert into the corresponding signal holes in the energy meter. The detection post 33 includes a first detection post 331, a second detection post 332, and a third detection post 333. There can be only one first detection post 331, a second detection post 332, and a third detection post 333, or there can be multiple third detection posts. They can be current posts or voltage posts. Of course, the first detection post 331 can also contain both current and voltage posts.

[0028] Furthermore, the detection column 33 also includes a fourth detection column 33. All detection columns 33 excluding the first, second, and third detection columns 331 are considered fourth detection columns 33. The first detection column 331 contracts in a three-phase inductive connection state, the second detection column 332 contracts in a three-phase direct connection state, and the third detection column 333 contracts in a single-phase connection state. The fourth detection column 33 does not contract in any of these three states. However, under the drive of the pitch drive assembly 44, the spacing between the first, second, third, and fourth detection columns 33 in the first direction may change. The reason for saying "may" is that when some pitch slots 321 extend along the second direction, the spacing between the corresponding detection columns 33 in that area will not change.

[0029] Reference Figure 6 In one embodiment, the detection column 33 is provided with a pitch-changing protrusion 335, with each pitch-changing protrusion 335 corresponding to at least one detection column 33. The meter plate 32 is provided with a pitch-changing groove 321, at least a portion of which extends in a direction intersecting the second direction and the first direction. The pitch-changing drive assembly 44 drives the meter plate 32 to extend and retract along the second direction, allowing the pitch-changing protrusion 335 to slide within the pitch-changing groove 321, thereby adjusting the spacing between the detection columns 33. Through the cooperation of the pitch-changing protrusion 335 and the obliquely arranged pitch-changing groove 321, the extension and retraction of the meter plate 32 by the pitch-changing drive assembly 44 along the second direction can be converted into a change in the distance between the detection columns 33. This allows the connection device to flexibly adapt to single-phase or three-phase energy meters of different sizes and terminal spacings, and enables rapid model changeover without hardware replacement, greatly improving the versatility and testing efficiency of the connection device and reducing the adaptation cost for different energy meters.

[0030] Furthermore, the variable pitch groove 321 includes a first variable pitch groove 321a and a second variable pitch groove 321b. At least one of the variable pitch grooves 321 has different extending directions for the first variable pitch groove 321a and the second variable pitch groove 321b, so that the spacing of the detection columns 33 can switch between the first spacing, the second spacing, and the third spacing. Each variable pitch protrusion 335 is connected to at least one detection column 33. The angle between each variable pitch groove 321 and the first direction can be changed according to actual needs. The processing method of the variable pitch groove 321 is simple, thus simplifying the structure of the connecting device. Simultaneously, the cooperation between the variable pitch protrusion 335 and the variable pitch groove 321 makes the spacing switching process more stable and reliable when adjusting the spacing between the detection columns 33. Furthermore, it uses mechanical positioning without complex electronic positioning procedures, resulting in stable performance and strong anti-interference ability of the detection columns 33 during the pitch change process. This reduces the manufacturing cost of the connecting device and improves the stability and reliability of the spacing switching of the detection columns 33 on the connecting device.

[0031] It should be noted that when the pitch protrusion 335 is located within the first pitch groove 321a and at one end away from the second pitch groove 321b, the spacing of the detection posts 33 in the first direction is the first spacing; when the pitch protrusion 335 is located at the intersection of the first pitch groove 321a and the second pitch groove 321b, the spacing of the detection posts 33 in the first direction is the second spacing; and when the pitch protrusion 335 is located within the second pitch groove 321b and at one end away from the first pitch groove 321a, the spacing of the detection posts 33 in the first direction is the third spacing.

[0032] It should be noted that when the extension direction of the first variable pitch groove 321a and / or the second variable pitch groove 321b is consistent with the second direction, the spacing between the corresponding detection columns 33 will not change.

[0033] In one embodiment, the three-phase drive assembly 46, the single-phase drive assembly 45, the first drive assembly 41, the second drive assembly 42, the third drive assembly 43, and the variable-pitch drive assembly 44 each include a drive motor 40a and a transmission rod 40b. The drive motor 40a is mounted on the meter base 30, and one end of the transmission rod 40b is connected to the output shaft of the drive motor 40a. By using a combination of drive motor 40a and transmission rod 40b for each drive assembly, the overall structural design is simplified, facilitating production, assembly, and maintenance. This transmission method offers fast response and precise control, meeting the diverse requirements of different probe plates and adjustment mechanisms for driving force and stroke, improving the coordination and reliability of the device, and simultaneously reducing energy consumption and operating noise.

[0034] Meanwhile, it is understandable that in existing technical solutions, different types of probe plates and gauge holders 30 are driven by cylinders to extend and retract in the second direction. Furthermore, to adapt to cylinder-driven existing technologies, corresponding pneumatic components such as air pipes, air valves, and air compressors are often required. Each probe plate and gauge holder 30 needs a corresponding cylinder drive structure, resulting in a complex internal structure of the connection device in existing solutions. Moreover, the installation of multiple cylinder drive structures requires numerous air pipes, necessitating a reasonable arrangement of air pipes to prevent interference with the operation of the cylinder drive structure. In contrast, the technical solution of this application directly drives the connection via a drive motor 40a, thus reducing the number of pneumatic components compared to cylinder-driven methods. This simplifies the internal components of the connection device, facilitating the installation and disassembly of the drive components and internal maintenance of the connection device. It also reduces the size of the connection device, contributing to its miniaturization.

[0035] Furthermore, the connecting device also has a third direction, which intersects the plane containing the first and second directions, and multiple drive motors 40a are stacked along this third direction. Compared to the pneumatic transmission method in the prior art, which requires periodic maintenance of the air circuit, if the sampling is arranged in a stacked manner, the air pipes, valves, and air compressors of the cylinder drive structure will be arranged in a complex manner. This means that when the connecting device needs to be maintained, the air pipes of the upper cylinder drive structure need to be disassembled to maintain the lower cylinder drive structure, which is inconvenient for the maintenance of the connecting device. However, since the technical solution of this application uses motor drive, there is no need to set up air pipes and other pipeline structures, which facilitates the stacking of drive motors 40a in the third direction and also facilitates the installation and maintenance of drive motors 40a. Therefore, by stacking multiple drive motors 40a along the third direction, the internal space utilization of the connecting device can be further improved, thereby further reducing the size of the connecting device and contributing to its miniaturization.

[0036] Specifically, the single-phase probe plate 20 includes a single-phase plate body 21 and three single-phase probe groups 22, each mounted on the single-phase plate body 21. Each of the three single-phase probe groups 22 includes multiple single-phase probes for simultaneously connecting three single-phase energy meters. Compared to the cumbersome process of connecting each meter one by one in the traditional method, the present application's technical solution, by simultaneously setting three single-phase probe groups 22 on the single-phase probe plate 20, allows the connection device switched to single-phase connection mode to simultaneously connect three single-phase energy meters, thereby significantly shortening the overall testing time of the connection device and greatly improving the energy meter testing efficiency.

[0037] Specifically, the three-phase probe plate 10 includes a three-phase plate body 11 and two three-phase probe groups 12, each mounted on the three-phase plate body 11. Each of the two three-phase probe groups 12 includes multiple three-phase probes for simultaneously connecting two three-phase energy meters. Compared to the cumbersome process of connecting each meter one by one in the traditional method, the present application's technical solution, by simultaneously setting two three-phase probe groups 12 on the three-phase probe plate 10, allows the connection device, whether switching to a three-phase inductive connection or a three-phase direct connection, to simultaneously connect two three-phase energy meters, thereby significantly shortening the overall testing time of the connection device and greatly improving the energy meter testing efficiency.

[0038] In one embodiment, the connection device further includes a base 61 and a meter drive assembly 63. The mounting plate 31 is slidably connected to the base 61, and the meter drive assembly 63 is mounted on the base 61 and is drively connected to the mounting plate 31 to drive the mounting plate 31 to extend along the second direction, so that the connection device can be inserted into the corresponding single-phase or three-phase energy meter. By adding the base 61 and connecting the mounting plate 31 to the base 61, the meter holder 30, drive assembly, three-phase probe plate 10, and single-phase probe plate 20 can extend and retract along the second direction as a whole. This allows the connection device to automatically move towards the energy meter under test and complete accurate insertion after the connection device completes the switch of the predetermined connection state, without the need for manual pushing or positioning, greatly improving the convenience, consistency, and safety of operation. This not only reduces the labor intensity and skill requirements of operators but also avoids the problems of misalignment and uneven force that may cause damage to the probes or meters due to manual insertion, thus improving the standardization and reliability of the testing process.

[0039] Furthermore, the meter connection drive assembly 63 includes a meter connection motor and a meter connection transmission rod. The meter connection motor is mounted on the base 61, and the meter connection transmission rod is connected to the output shaft of the meter connection motor. Compared with the cylinder transmission method in the prior art, the present application uses motor transmission, which allows for more precise control of the extension stroke, speed, and stop position of the mounting plate 31; it avoids positioning deviations or impacts caused by air pressure fluctuations in the pneumatic system, thereby significantly improving the alignment accuracy and repeatability of the connection between the connection device and the corresponding electricity meter.

[0040] Specifically, the base 61 is provided with a first slide rail 62, which extends along the second direction. The mounting plate 31 is provided with a mounting groove, and the mounting plate 31 is slidably connected to the base 61 through the first slide rail 62 and the mounting groove. The cooperation between the first slide rail 62 and the mounting groove provides high-strength and high-precision linear guidance, ensuring that the entire mounting plate 31 moves smoothly and without shaking during extension and retraction, and is accurately positioned. Secondly, this mechanical guide rail structure has strong load-bearing capacity, good durability, can maintain accuracy for a long time, and is easy to maintain. It effectively restricts the degree of freedom of movement, ensures the alignment accuracy between the connection device and the electricity meter interface, and thus improves the stability and reliability of the connection device.

[0041] Reference Figure 7 and Figure 8 Understandably, during the connection process with the energy meter, the connection device inevitably exerts a pushing effect on the three-phase probe plate 10 and the single-phase probe plate 20 in the first and second directions. Therefore, to further improve the stability and reliability of the three-phase probe plate 10 and the single-phase probe plate 20, in one embodiment, the connection device includes a locking structure 50, through which both the three-phase probe plate 10 and the single-phase probe plate 20 are locked in a predetermined state. When the connection device switches to a three-phase inductive connection state and a three-phase direct connection state, the locking structure 50 locks and fixes the three-phase probe plate 10 and the single-phase probe plate 20 to prevent them from shifting to the predetermined position, thereby enabling the connection device to accurately connect with the three-phase energy meter. When the connection device switches to the unidirectional mutual inductance connection state, the locking structure 50 locks and fixes the three-phase probe plate 10 and the single-phase probe plate 20 to prevent them from shifting to their predetermined positions, thus allowing the connection device to accurately connect with the single-phase energy meter. This greatly improves the safety of equipment operation and the reliability of the testing process. When the connection device is energized or tested with the energy meter, the locking effectively prevents the probe plates from being accidentally displaced or loosened due to vibration, accidental contact, or unexpected failure of the internal drive, thereby avoiding test data fluctuations, electrical sparks, or even equipment damage caused by poor contact. At the same time, the mechanical locking provides rigid support for the precision probes, ensuring the stability and consistency of electrical contact.

[0042] Specifically, the locking structure 50 includes a locking motor and a positioning rod 51. The locking motor is mounted on the mounting plate 31 and is connected to the positioning rod 51 in a transmission manner. The three-phase probe plate 10 is provided with a first front positioning hole 13 and a first rear positioning hole 14, and the single-phase probe plate 20 is provided with a second front positioning hole 23 and a second rear positioning hole 24. In the three-phase inductive connection state and the three-phase direct connection state, the positioning rod 51 passes through the second front positioning hole 23 and the first rear positioning hole 14 in sequence. In the single-phase connection state, the positioning rod 51 passes through the second rear positioning hole 24 and the first front positioning hole 13 in sequence.

[0043] That is, when the connection device is in the three-phase inductive connection state and the three-phase direct connection state, the three-phase probe plate 10 extends and the single-phase probe plate 20 retracts, so that the first rear positioning hole 14 and the second front positioning hole 23 are on the same straight line. At this time, the locking motor drives the positioning rod 51 to be inserted into the second front positioning hole 23 and the first rear positioning hole 14 in sequence, thereby locking and fixing the three-phase probe plate 10 and the single-phase probe plate 20. When the connection device is in the single-phase connection state, the single-phase probe plate 20 extends and the three-phase probe plate 10 retracts, so that the second rear positioning hole 24 and the first front positioning hole 13 are on the same straight line. At this time, the locking motor drives the positioning rod 51 to be inserted into the second rear positioning hole 24 and the first front positioning hole 13 in sequence, thereby locking and fixing the three-phase probe plate 10 and the single-phase probe plate 20. By using differentiated hole design, the positioning rod 51 can simultaneously control the locking and positioning of the three-phase probe plate 10 and the single-phase probe plate 20, thus eliminating the need to set a corresponding locking structure for each probe plate. This reduces the number of internal parts of the connection device, thereby reducing the manufacturing cost of the connection device and facilitating its miniaturization.

[0044] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A connecting device, characterized in that, include: Three-phase probe plate and single-phase probe plate; A meter holder includes a mounting plate, a meter receiving plate mounted on the mounting plate, and a plurality of detection columns mounted on the meter receiving plate, wherein the plurality of detection columns are spaced apart along a first direction; the detection columns include a first detection column, a second detection column, and a third detection column. A drive assembly, mounted on the mounting plate, includes a first drive assembly, a second drive assembly, a third drive assembly, a variable pitch drive assembly, a single-phase drive assembly, and a three-phase drive assembly. The first drive assembly, the second drive assembly, and the third drive assembly are respectively used to drive the first detection column, the second detection column, and the third detection column to extend and retract along a second direction; the second direction intersects with the first direction. The variable pitch drive assembly is used to adjust the spacing of the plurality of detection columns in the first direction, so that at least some of the detection columns form a first spacing, a second spacing, and a third spacing; the single-phase drive assembly and the three-phase drive assembly are respectively used to drive the single-phase probe plate and the three-phase probe plate to extend and retract along the second direction; The connection device has a three-phase inductive connection state, a three-phase direct connection state, and a single-phase connection state: in the three-phase inductive connection state, the spacing is switched to the first spacing, the first detection column retracts, and the three-phase probe plate extends; in the three-phase direct connection state, the spacing is switched to the second spacing, the second detection column retracts, and the three-phase probe plate extends. In the single-phase connection state, the spacing is switched to the third spacing, the second and third detection columns retract, and the single-phase probe plate extends.

2. The connecting device as described in claim 1, characterized in that, The connection device also has a third direction, which is intersected with the plane containing the second direction and the first direction. The mounting plate is provided with a meter connection groove, a single-phase groove and a three-phase groove stacked sequentially along the third direction. The meter connection plate, the single-phase probe plate and the three-phase probe plate are respectively slidably connected to the meter connection groove, the single-phase groove and the three-phase groove in sequence.

3. The connecting device as described in claim 1, characterized in that, The detection column is provided with a pitch-changing protrusion, and each pitch-changing protrusion corresponds to at least one detection column. The dial indicator plate is provided with a pitch-changing groove, and at least a portion of the pitch-changing groove extends in a direction that intersects the second direction and the first direction. The pitch-changing drive assembly drives the dial indicator plate to extend and retract along the second direction so that the pitch-changing protrusion slides in the pitch-changing groove to adjust the spacing of the detection columns.

4. The connecting device as described in claim 3, characterized in that, The variable pitch slot includes a first variable pitch slot and a second variable pitch slot, and at least one of the first variable pitch slots and the second variable pitch slot have different extension directions, so that the spacing of the detection column switches between the first spacing, the second spacing and the third spacing.

5. The connecting device as described in claim 1, characterized in that, The three-phase drive assembly, the single-phase drive assembly, the first drive assembly, the second drive assembly, the third drive assembly, and the variable-pitch drive assembly all include a drive motor and a transmission rod. The drive motor is mounted on the connector base, and one end of the transmission rod is connected to the output shaft of the drive motor.

6. The connecting device as described in claim 5, characterized in that, The connecting device also has a third direction, which intersects the plane containing the first direction and the second direction, and a plurality of the drive motors are stacked along the third direction.

7. The connecting device as described in claim 1, characterized in that, The single-phase probe board includes a single-phase board body and three single-phase probe groups, each mounted on the single-phase board body. Each of the three single-phase probe groups includes multiple single-phase probes for simultaneously connecting to three single-phase energy meters.

8. The connecting device as described in claim 1, characterized in that, The three-phase probe board includes a three-phase board body and two three-phase probe groups, each mounted on the three-phase board body. Each of the two three-phase probe groups includes multiple three-phase probes for simultaneously connecting two three-phase energy meters.

9. The connecting device as described in claim 1, characterized in that, The connection device further includes a base and a meter driving assembly. The mounting plate is slidably connected to the base, and the meter driving assembly is installed on the base and is drivenly connected to the mounting plate to drive the mounting plate to extend along the second direction so that the connection device can be plugged into the corresponding single-phase or three-phase energy meter.

10. The connecting device as described in claim 9, characterized in that, The base is provided with a first slide rail, which extends along the second direction. The mounting plate is provided with a mounting groove, and the mounting plate is slidably connected to the base through the first slide rail and the mounting groove.

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