Welding Fixture for Sampling Components of High-Precision Smart Electric Meters

Abstract

The present invention discloses a welding fixture for a sampling element of a high-precision intelligent electric meter. Its bottom plate includes a first concave cavity and a first fixing cavity, which are respectively used for placing a sixth connecting plate and fixing a terminal box unit. The sixth connecting plate has a second fixing cavity for fixing a switch unit. A clamping unit is slidably connected to the sixth connecting plate and is provided with a third fixing cavity for fixing an instrument transformer. There are also corresponding driving mechanisms, a pressing mechanism, a buffer mechanism, a switch unit, and the instrument transformer moving relative to the terminal box unit, making the connection and cooperation accuracy more stable, with high positioning accuracy, and having the advantages of wide applicability and good stability. It can prevent assembly deviation and false soldering, improve the welding quality, adapt to automated production, and ensure the function accuracy of related metering, billing, switching on and off of the intelligent electric meter.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment, and particularly to a welding fixture for sampling elements of high-precision intelligent electricity meters. Background Art

[0002] I. Development and Application Requirements of Intelligent Electricity Meters

[0003] Intelligent electricity meters are the basis for carbon, energy efficiency, electricity quantity, and billing metering under the background of the new power system's energy dual carbon. They are large in number and wide in application scope, and their reliability and accuracy are crucial for the safe operation of the power grid and users and for economic and property interests.

[0004] Popularization of intelligent electricity meters: With the advancement of the intelligentization of the power system, traditional electricity meters are gradually being replaced by intelligent electricity meters. Intelligent electricity meters can monitor the power consumption in real time, achieve remote meter reading, two-way communication, and support functions such as time-of-use electricity prices, bringing great convenience to power management and user use. Globally, countries are vigorously promoting the installation and application of intelligent electricity meters, and their market scale continues to expand, which puts forward higher requirements for the production efficiency and quality of intelligent electricity meters.

[0005] Key role of sampling elements: The sampling elements in intelligent electricity meters are one of the core components for realizing accurate electricity metering and data acquisition functions. It is responsible for accurately sampling electrical signals such as current and voltage in the circuit, active signals, reactive signals, 485 communication signals, and metering and billing switch-on and switch-off signals, and converting them into digital signals that can be processed by the microprocessor inside the electricity meter. For example, common current sampling elements obtain current information through high-precision shunt resistors or current transformers, etc., and voltage sampling elements can accurately measure the voltage values at different nodes, the accuracy and offset of the sampling element assembly and positioning, which affect the accuracy of the sampling of metering and billing switch-on and switch-off signals, active, reactive, 485 and other communication signals. The quality of the sampling element performance and the welding quality directly affect the accuracy and stability of the intelligent electricity meter metering.

[0006] II. Importance and Challenges of Welding Technology in the Production of Intelligent Electricity Meters

[0007] The smart meter includes a switching unit (relay or load switch or other switching control switch), a current transformer (for current signal), and copper bars for terminal blocks. After they are welded together, the pins of sampling components such as the pins on the switching unit and the pins on the current transformer need to form a reliable connection with the circuit board of the smart meter. If the positions deviate after the switching unit, current transformer, and copper bars for terminal blocks are welded together, it will greatly affect the welding between the pins and the pads on the circuit board. High-quality welding can ensure good electrical and mechanical connections between the component pins and the pads on the circuit board, guaranteeing the stability and reliability of signal transmission. During the long-term operation of the smart meter, the welded parts should be able to withstand various factors such as environmental temperature changes and electromagnetic interference without loosening, soldering defects, etc., otherwise it will lead to adverse consequences such as measurement errors and data transmission failures.

[0008] Challenges in welding: Miniaturization of components: To meet the development trend of miniaturization and integration of smart meters, the sizes of sampling components are getting smaller and the pin pitches are constantly shrinking. This makes the requirement for positioning accuracy extremely high during welding. Traditional manual welding or simple fixture-assisted welding can hardly guarantee the position accuracy of the switching unit, current transformer, and copper bars for terminal blocks, thus affecting the precise alignment between the pins and the pads, prone to welding deviations, and increasing the probability of welding defects.

[0009] Requirements for production efficiency: With the rapid growth of market demand for smart meters, production enterprises need to improve production efficiency to meet the requirements of mass supply. However, traditional welding methods are relatively cumbersome in operation, and it takes a long time to clamp and weld a single sampling component, making it difficult to adapt to the large-scale and high-efficiency production rhythm, which becomes one of the bottlenecks restricting the improvement of production efficiency.

[0010] Quality consistency: To ensure the stable performance and accurate measurement of each smart meter, it is necessary to ensure the consistency of the welding quality of sampling components. However, manual welding is greatly affected by factors such as the skill level and working state of operators, and it is very difficult to achieve the same high-quality standard for each welding, which poses a challenge for enterprises to ensure the uniformity of product quality.

[0011] III. Limitations of existing welding fixtures

[0012] Insufficient positioning accuracy: Some traditional welding fixtures are relatively simple and rough in design, and the positioning of small sampling components is not accurate enough. They cannot accurately fix the components in the ideal welding position, resulting in easy pin offset during welding, affecting the welding effect, and thus reducing the overall quality of the smart meter.

[0013] Poor versatility: Some jigs on the market are often designed for specific models or specifications of sampling components. When an enterprise needs to produce smart meters of different types (single-phase, two-phase, three-phase), involving multiple sampling components, a large number of different jigs need to be equipped, which increases the equipment procurement cost and the complexity of production management. Moreover, frequent jig replacement will also reduce production efficiency.

[0014] Lack of automation adaptability: Against the backdrop of the transformation of the manufacturing industry towards automated production, many existing welding jigs do not consider good connection with automated welding equipment and production lines, making it difficult to integrate into the automated production process, which is not conducive to enterprises further improving production efficiency, reducing labor costs and enhancing the consistency of product quality.

[0015] IV. Technological Development Trends Promote Innovation

[0016] Demand for automated and intelligent manufacturing: Currently, the overall manufacturing industry is developing towards automation and intelligence. Smart meter manufacturers also expect to build a fully automated production workshop to achieve automated operations for a series of processes from component feeding, welding to finished product assembly. This requires welding jigs to have corresponding automation adaptation functions, be able to work in coordination with robots, automated welding systems, etc., and improve the automation level and accuracy of production.

[0017] Application of advanced manufacturing technologies: The continuous development of technologies such as precision machining technology and new material technology provides technical support for the innovation of welding jigs. For example, high-precision numerical control machining equipment can manufacture jig components with higher dimensional accuracy and more complex structures. New types of wear-resistant, anti-static and other materials can be applied to key parts of the jigs to improve the performance and service life of the jigs, enabling R & D personnel to use these advanced technologies to develop new jigs that better meet the welding requirements of smart meter sampling components, so as to overcome the many limitations of existing jigs and meet the growing production and quality requirements.

[0018] The intelligent electric meter includes a switch unit, a transformer, and a terminal copper bar. The switch unit and the terminal copper bar, and the transformer and the terminal copper bar are both welded naked. At least two sets of welding equipment and fixtures are required, with many processes, a long turnover cycle, low efficiency, and high costs. The fixing methods of the existing fixtures are different. The problem is that the welding quality consistency between this process and the subsequent process is poor, and welding cracks are likely to occur. The welds are offset and have false soldering with assembly and detection, seriously affecting the actual welding quality. The sampling components of the intelligent electric meter are usually small in size, and there are large deviations in the alignment of the welding positions of key parts such as pins during manual welding. The assembly and detection are difficult, and the welding points corresponding to the component pins and the circuit board cannot be aligned, with large errors, affecting the subsequent component assembly and detection, as well as the overall performance and reliability of the electric meter. Reducing problems such as after-sales maintenance caused by initial component damage is affected. Therefore, how to achieve an accurate fixing method for sampling components to improve welding efficiency, ensure the overall performance, reliability, and quality of the electric meter has become a technical problem urgently to be solved by those skilled in the art. Summary of the Invention

[0019] Therefore, the technical problem to be solved by the present invention is how to achieve a fixing method for sampling components that is convenient for improving welding efficiency, high-precision positioning, wide applicability, and suitable for automation. For this purpose, a welding fixture for sampling components of a high-precision intelligent electric meter includes:

[0020] A bottom plate, the bottom plate is provided with a first concave cavity and a first fixing cavity, and the first fixing cavity is used to fix the terminal box unit;

[0021] A sixth connecting plate, the sixth connecting plate is accommodated in the first concave cavity, and the sixth connecting plate slides relative to the first concave cavity; the sixth connecting plate is provided with a second fixing cavity, and the second fixing cavity is used to fix the switch unit;

[0022] A clamping unit, the clamping unit is slidably connected to the sixth connecting plate, and the clamping unit is provided with a third fixing cavity, and the third fixing cavity is used to fix the transformer;

[0023] A first driving mechanism; the first driving mechanism is linked with the sixth connecting plate, and the first driving mechanism drives the sixth connecting plate to reciprocate toward the side of the first fixing cavity;

[0024] A fourth driving mechanism; the fourth driving mechanism is linked with the clamping unit, and the fourth driving mechanism drives the clamping unit to reciprocate toward the side of the first fixing cavity;

[0025] A first pressing mechanism; the first pressing mechanism is used to fix the terminal box unit;

[0026] The terminal box unit is fixed with a switch unit copper terminal and a transformer copper terminal. The switch unit is fixed with a second conductive member, and the transformer is fixed with a third conductive member. Both the second conductive member and the third conductive member are fixed with welding pads. The second conductive member is welded to the switch unit copper terminal, and the third conductive member is welded to the transformer copper terminal.

[0027] The bottom plate is provided with a sliding groove, and the sliding groove is provided with a first horizontal groove and a first inclined groove. The first horizontal groove communicates with the first inclined groove. The sixth connecting plate is provided with a first protrusion, and the first protrusion slides in the sliding groove. Or, it further includes a convex block. The convex block is connected to the bottom plate. The convex block is provided with a sliding groove, and the sliding groove is provided with a first horizontal groove and a first inclined groove. The first horizontal groove communicates with the first inclined groove. The sixth connecting plate is provided with a first protrusion, and the first protrusion slides in the sliding groove.

[0028] It further includes a positioning frame and a return spring. The positioning frame is provided with a first U-shaped groove and a first fixing column. On both sides of the front arm of the first U-shaped groove, a double-sided L-shaped first stepped opening groove and a second stepped opening groove are symmetrically arranged. The first stepped opening groove and the second stepped opening groove are used for positioning and supporting the third conductive member. The bottom surface of the positioning frame is provided with a 7-shaped stepped surface. The sixth connecting plate is provided with a first opening groove and a second opening groove. A linear ball guide is installed between one side surface of the positioning frame and the first opening groove, and a linear ball guide is installed between the other side surface of the positioning frame and the first opening groove. The positioning frame slides relative to the sixth connecting plate, and the clamping unit is fixed on the positioning frame. The bottom plate is provided with a second fixing column. One end of the return spring cooperates with the first fixing column, and the other end of the return spring cooperates with the second fixing column.

[0029] The number of the first U-shaped grooves is one, two or three, and each first U-shaped groove is correspondingly fixed with a clamping unit.

[0030] It further includes a tenth connecting plate. The tenth connecting plate is connected to the bottom plate. The tenth connecting plate is provided with a support plate, and the support plate is provided with a buffer spring hole. A spring is accommodated in the buffer spring hole, and the other end of the spring abuts against the clamping unit.

[0031] A first sliding pair is provided between the side wall of the first cavity and the sixth connecting plate.

[0032] The clamping unit includes a fixed claw and a rotating claw. One end of the rotating claw rotates relative to the fixed claw, and the other end of the rotating claw cooperates with the fixed claw to form the third fixed cavity. A pressing spring is provided between the fixed claw and the rotating claw. The fixed claw is provided with an inner arc, and the rotating claw is provided with a first L-shaped step groove, a first arc, a second arc, and a third arc, which are connected in sequence.

[0033] The first pressing mechanism includes a first pressing member, which rotates horizontally and moves vertically up and down relative to the bottom plate.

[0034] One end of the sixth connecting plate facing the first fixed cavity is provided with a floating pressure limiting unit, and the other end of the sixth connecting plate away from the first fixed cavity is provided with a floating pressure opening unit.

[0035] The floating pressure limiting unit includes a 7-shaped clamping plate, which is connected to one end of the sixth connecting plate close to the first fixed cavity. The 7-shaped clamping plate is provided with a second U-shaped groove and a third U-shaped groove, and floating lifting components are provided in both the second U-shaped groove and the third U-shaped groove. The floating lifting component is a combination of a spring and a T-shaped sliding column.

[0036] It further includes a front clamping component and a rear clamping component. The first fixed cavity is provided with an intermediate groove, a first relief groove, and a front groove, which are communicated. Through holes are provided at both ends of the front groove, and an L-shaped sliding plate is fixed in the through holes. The L-shaped sliding plate is installed between the front clamping component and the rear clamping component.

[0037] It further includes a second driving mechanism and a buffer mechanism. The second driving mechanism drives the bottom plate to move along a first direction, and the buffer mechanism cooperates with the bottom plate. The buffer mechanism is adjustable.

[0038] It further includes a third driving mechanism and a fifth driving mechanism. The third driving mechanism drives the bottom plate to move along a second direction, and the fifth driving mechanism drives the bottom plate to move along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other pairwise.

[0039] It also includes a first connecting plate, a second connecting plate, a third connecting plate, a fourth connecting plate, and a seventh connecting plate. The third driving mechanism drives the first connecting plate to move; the fifth driving mechanism is arranged above the first connecting plate. The fifth driving mechanism drives the second connecting plate to be connected. The third connecting plate is vertically connected to the second connecting plate. The fourth connecting plate is arranged parallel to the second connecting plate. The fourth connecting plate is vertically connected to the third connecting plate. The seventh connecting plate is vertically connected to the bottom plate. The seventh connecting plate is respectively connected to the third connecting plate and the second connecting plate.

[0040] The technical solution of the present invention has the following advantages:

[0041] 1. The high-precision intelligent electricity meter sampling element welding jig provided by the present invention adopts such a structural setting. First, the switch unit and the mutual inductor move relative to the terminal box unit, making the cooperation between the switch unit, the mutual inductor and the terminal box unit more stable. Moreover, the combined fixing method of the three components forms an automated processing and welding, which can avoid the faults caused by manual operation. The setting of the welding piece improves the welding quality during the welding process. The connection and cooperation accuracy between the switch unit, the mutual inductor and the terminal box, as well as the switch unit's metering and charging switch-on and off, active power, reactive power, 485 and other communication units is more stable, with high positioning accuracy, wide applicability, good stability, high automation compatibility, protecting the sampling element, preventing assembly deviation and false soldering, and improving the welding quality. It is a high-precision intelligent electricity meter sampling element welding jig with convenient operation, good adaptability to automated production, and accurate signals for high-precision active power, reactive power, communication metering, and metering and charging switch-on and off.

[0042] 2. For the high-precision intelligent electricity meter sampling element welding jig provided by the present invention, since the contact surfaces of the switch unit and the terminal box unit and the contact surfaces of the mutual inductor and the terminal box unit are not at the same horizontal height, the first driving mechanism drives the sixth connecting plate to move. When the first protrusion cooperates with the first inclined groove, an action of pressing downward obliquely is formed, enabling the welding cooperation between the switch unit and the terminal box unit, and the mutual inductor and the terminal box unit.

[0043] 3. For the high-precision intelligent electricity meter sampling element welding jig provided by the present invention, this reset spring tension + moving pair design mainly aims at the problems that in the prior art, the positioning clamping and welding of the third conductive part on the mutual inductor cannot be separated, and the positioning frame is prone to poor welding during the welding process with the copper terminal of the mutual inductor and the third conductive part. Through the movement of the positioning frame, a relative movement effect can be formed.

[0044] 4. The welding fixture for the sampling element of the high-precision intelligent electric meter provided by the present invention has a first U-shaped groove corresponding to fixing a clamping unit, and one clamping unit corresponds to one mutual inductor. When the electric meter is single-phase, the number of the first U-shaped grooves is one; when the electric meter is two-phase, the number of the first U-shaped grooves is two; when the electric meter is three-phase, the number of the first U-shaped grooves is three.

[0045] 5. The welding fixture for the sampling element of the high-precision intelligent electric meter provided by the present invention has a buffer spring hole for the first protrusion to slide along the first inclined groove. The spring buffer rotates and jacks up the clamping unit to prevent overvoltage between the switch unit and the copper terminal of the switch unit, and between the mutual inductor and the copper terminal of the mutual inductor, which may cause cracking and excessive extrusion of the solder, resulting in excessive overflow of the solder and insufficient brazing weld.

[0046] 6. The welding fixture for the sampling element of the high-precision intelligent electric meter provided by the present invention has the first sliding pair, which improves the sliding effect of the sixth connecting plate relative to the bottom plate.

[0047] 7. The welding fixture for the sampling element of the high-precision intelligent electric meter provided by the present invention forms the clamping and fixing of the mutual inductor. Since the main body part of the mutual inductor is circular, the clamping and fixing is formed through the clamping mechanism. Secondly, after the welding is completed, at this time, the terminal box unit, the switch unit, and the mutual inductor form an integral structure. By rotating the rotating claw, the whole can be taken out to perform the next detection operation, and the operation is highly convenient. Moreover, with this structural setting, the fixing effect of different mutual inductors is formed, and this clamping unit can be applied to the mutual inductors of Southern Power Grid and State Grid.

[0048] 8. The welding fixture for the sampling element of the high-precision intelligent electric meter provided by the present invention has a first pressing member for fixing the terminal box unit to prevent the terminal box unit from shaking during the welding process. In the initial state, the first pressing member rotates to the outside of the first fixing cavity, so that the terminal box unit can be placed into the first fixing cavity. After the terminal box unit, the switch unit, and the mutual inductor are placed, the first pressing member will rotate above the terminal box unit and move towards the terminal box unit until it abuts against the terminal box unit to form a fixing effect.

[0049] 9. The welding fixture for the sampling element of the high-precision smart meter provided by the present invention. The floating pressure limiting unit applies a reverse force to the second conductive part, preventing overvoltage between the switch unit and the copper terminal of the switch unit, and between the mutual inductor and the copper terminal of the mutual inductor from causing cracking and excessive extrusion of the solder, which may lead to excessive overflow of the solder and insufficient brazing welds. The floating pressure opening unit is to prevent the moving and static contacts inside the switch unit from still being in the connected state during the welding process. If the moving and static contacts inside the switch unit are in the connected state during welding, the large welding current will cause adhesion and melting of the moving and static contacts of the switch unit, resulting in jamming of the mechanism, non-power-on of the mutual inductor, etc., and the inability to realize the remote opening and closing of low-voltage users and the electricity charge control function. By means of the floating pressure opening unit, it is ensured that the moving and static contacts inside the switch unit are in the disconnected state, thereby improving the stability and welding quality of subsequent welding.

[0050] 10. The welding fixture for the sampling element of the high-precision smart meter provided by the present invention. The support structure of the front slot terminal box unit forms a support and limiting effect.

[0051] 11. The welding fixture for the sampling element of the high-precision smart meter provided by the present invention. With the setting of the buffer mechanism, it forms a protective effect on the lower electrode, preventing the lower electrode from cracking during use.

[0052] 12. The welding fixture for the sampling element of the high-precision smart meter provided by the present invention. The second driving mechanism, the third driving mechanism, and the fifth driving mechanism form driving effects in different directions, that is, they form sliding effects in the three directions of the X-axis, Y-axis, and Z-axis.

[0053] 13. The welding fixture for the sampling element of the high-precision smart meter provided by the present invention. Through the cooperation between multiple connecting plates, a certain connection strength is formed to meet the movement in different directions.

[0054] 14. High positioning accuracy

[0055] Advantages: Smart meter sampling elements are usually small in size, and key parts such as pins need to be accurately aligned with the welding positions. This welding fixture often has special positioning structures, such as high-precision card slots, positioning pins, etc. These positioning components can accurately limit the placement position of the sampling element, ensuring that it will not shift during the welding process, enabling the pins of the sampling element to be precisely aligned with the corresponding welding points on the circuit board during subsequent welding, and the error can be controlled within an extremely small range, generally reaching the millimeter or even micron level.

[0056] Effect: Precise positioning helps to improve the welding quality and reduce the occurrence of welding defects such as false soldering and bridging. For example, during the large-scale production of smart meters, it can ensure that each sampling component inside the meter is accurately welded in place, improving the consistency and reliability of the product, reducing the failure rate of meters caused by poor welding, thereby enhancing the quality of the entire meter product and extending its service life.

[0057] 15. Strong operational convenience

[0058] Advantage: The patented fixture is designed with full consideration of the operator's usage experience. It may adopt convenient clamping methods, such as a quick snap structure or a simple tightening device. The operator can quickly fix the sampling component on the fixture with simple operation steps and can also easily remove it after welding. The entire operation process is smooth and efficient, and can be mastered without complex tools or long-term training.

[0059] Effect: It can effectively shorten the welding operation time of a single sampling component. During the batch production of smart meters, it can significantly improve production efficiency. For example, originally, it might take several minutes to install and complete the welding of a sampling component, but with this fixture, the time can be shortened to dozens of seconds, greatly accelerating the production rhythm, reducing labor costs, and enabling the enterprise to produce more qualified smart meter products per unit time.

[0060] 16. Wide applicability

[0061] Advantage: Considering that the sampling components of smart meters may have various specifications, models, and different external dimensions, this welding fixture usually has a certain general design. For example, by adjusting some movable parts on the fixture and replacing the appropriate positioning modules, it can adapt to sampling components of different sizes and types, enabling it to be applied to the production of various styles of smart meters without the need to specially equip different fixtures for each slightly different component.

[0062] Effect: For meter manufacturing enterprises, it reduces the types and procurement costs of fixtures and improves the utilization rate of equipment. At the same time, when facing product upgrades or different customer customization requirements, production can be adjusted more flexibly. As long as the changes in the sampling component are within the adjustable range of the fixture, the fixture can continue to be used for welding operations, enhancing the adaptability of the enterprise's production and its market competitiveness.

[0063] 17. Good stability

[0064] Advantages: The structural design of the fixture focuses on stability. Generally, high-strength and rigid materials are used, such as high-quality metal alloys. And its overall structure has been analyzed and optimized mechanically, capable of withstanding various external forces during the welding process, such as the pressing of the upper and lower electrodes during welding operations and the slight vibrations generated by welding fumes. This ensures that the sampling element can always maintain a fixed position during welding and will not shake or displace due to external interference.

[0065] Effect: It ensures the smooth progress of the welding process, further improves the welding quality, enables each solder joint to be formed evenly and firmly, reduces the probability of welding defects, improves the electrical performance of the sampling circuit of the smart meter, guarantees the accuracy and stability of the sampling data during the long-term use of the meter, and enhances the overall performance and reliability of the product.

[0066] 18. High automation compatibility

[0067] Advantages: As the manufacturing industry develops towards automation and intelligence, the design of this welding fixture may reserve interfaces for docking with automated welding equipment or have structural features convenient for automated control. For example, the fixture can be easily installed at the welding station on the automated production line and can precisely cooperate with automated welding devices such as robotic welding arms to achieve automatic feeding, positioning, and welding of the sampling element, facilitating integration into the fully automated production system.

[0068] Effect: It helps enterprises build an intelligent electricity meter production workshop, further improves production efficiency, reduces the uncertainties brought by manual intervention, and improves the consistency of product quality. At the same time, it reduces the dependence on manual operation skills. Enterprises can allocate human resources more reasonably, free up manpower from the cumbersome welding operations, and invest it in more creative and high-value-added work links, enhancing the overall production management level and economic benefits of the enterprise.

[0069] 19. Protect the sampling element

[0070] Advantages: At the parts where the fixture contacts the sampling element, special materials such as soft and anti-static materials may be used for protection, or a reasonable contact method is designed to avoid physical damage such as scratching and squeezing to the vulnerable parts of the sampling element (such as pins, the surface of sensitive electronic components, etc.) during the clamping process, and at the same time prevent static electricity from damaging the internal electronic circuit of the component.

[0071] Effect: It reduces the damage rate of the sampling element before welding, increases the yield rate of the component, and reduces the material loss part in the production cost. Moreover, it ensures that the sampling elements installed in the smart meter are all intact, helps to guarantee the overall performance and reliability of the meter, and reduces after-sales maintenance and other problems caused by initial component damage. Description of the drawings

[0072] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0073] Figure 1 An exploded view of the terminal box unit, switch unit, and mutual inductor provided by the present invention;

[0074] Figure 2 A structural schematic diagram of the welding fixture for the sampling element of the high-precision intelligent electric meter provided by the present invention;

[0075] Figure 3 An exploded schematic diagram of the welding fixture for the sampling element of the high-precision intelligent electric meter provided by the present invention;

[0076] Figure 4 A structural schematic diagram of the cooperation between the fixed claw and the rotating claw provided by the present invention;

[0077] Figure 5 A schematic diagram of the cooperation between the fixed claw, rotating claw and the mutual inductor of the Southern Power Grid provided by the present invention;

[0078] Figure 6 A schematic diagram of the cooperation between the fixed claw, rotating claw and the mutual inductor of the State Grid provided by the present invention;

[0079] Figure 7 A structural schematic diagram of the positioning frame in the two-phase electric meter provided by the present invention;

[0080] Figure 8 A structural schematic diagram of the sixth connecting plate in the two-phase electric meter provided by the present invention;

[0081] Figure 9 A structural schematic diagram of the positioning frame in the three-phase electric meter provided by the present invention;

[0082] Figure 10 A structural schematic diagram of the sixth connecting plate in the three-phase electric meter provided by the present invention.

[0083] Explanation of reference numerals:

[0084] 11. Base plate; 12. First pressing mechanism; 14. First driving mechanism; 15. Terminal box unit; 16. Switch unit; 17. Current transformer; 25. Fixed claw; 26. Rotating claw; 29. Second driving mechanism; 30. Buffer mechanism; 31. First side plate; 32. Second side plate; 33. First sliding pair; 40. Third driving mechanism; 41. Fifth driving mechanism; 105. Second fixing column; 111. Sixth connecting plate; 112. Chute; 113. First concave cavity; 114. First fixing cavity; 115. Convex block; 120. Return spring; 121. First pressing member; 124. Tenth connecting plate; 125. Outer arc; 128. First arc; 129. Second arc; 131. Second fixing cavity; 132. Third fixing cavity; 133. Through hole; 151. Copper terminal of switch unit; 152. Copper terminal of current transformer; 161. Second conductive member; 162. First pin; 171. Third conductive member; 235. Floating pressure opening mechanism; 239. Floating pressure limiting unit; 241. Support plate; 243. 7-shaped clamping plate; 244. Second U-shaped groove; 246. Third U-shaped groove; 247. Second relief groove; 245. First through hole groove; 248. Second through hole groove; 256. First protrusion; 258. Inner arc; 260. Rotating shaft; 261. First L-shaped step groove; 1121. First horizontal groove; 1122. First inclined groove; A20. First connecting plate; A21. Second moving pair; A22. Second connecting plate; A23. Third connecting plate; A25. Fourth connecting plate; A29. Fourth driving mechanism; A33. Seventh connecting plate; A32. Fifth connecting plate; A35. Installation groove; A105. First fixing column; A118. Second opening groove; A119. Positioning frame; A120. First stepped opening groove; A121. Rear clamping component; A123. 7-shaped stepped surface; A124. Second stepped opening groove; A127. Third arc; A129. First protruding end arc; A255. First opening groove; A126. Third opening groove; A132. Intermediate groove; A134. Front groove; A136. First relief groove; A257. First U-shaped groove; A239. Front clamping component; A1291. Second protruding end arc. Detailed implementation manner

[0085] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0086] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0087] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0088] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0089] Embodiment 1

[0090] This embodiment provides a welding fixture for sampling elements of a high-precision intelligent electric meter. As shown in the attached Figures 1-10 figure, it includes:

[0091] A bottom plate 11, which is used to cooperate with the workbench surface. Here, the bottom plate 11 can be movably connected to the workbench surface, or the bottom plate 11 can be fixedly connected to the workbench surface. Those skilled in the art can adjust according to actual needs. The bottom plate 11 is provided with a first concave cavity 113 and a first fixed cavity 114. The first fixed cavity 114 is used to fix the terminal box unit 15. Here, the first fixed cavity 114 opens upward, and the terminal box unit 15 is placed into the first fixed cavity 114 from above.

[0092] A sixth connecting plate 111, which is accommodated in the first concave cavity 113 and slides relative to the first concave cavity 113, that is, the sixth connecting plate 111 slides in the first concave cavity 113. Here, the sliding direction is specifically the direction towards the first fixed cavity 114. The sixth connecting plate 111 is provided with a second fixed cavity 131, and the second fixed cavity 131 is used to fix the switch unit 16. The switch unit 16 is fixed in the second fixed cavity 131. The switch unit 16 can be a relay, a load switch, or other switching control switches.

[0093] The clamping unit is slidably connected to the sixth connecting plate 111. The clamping unit is arranged above the sixth connecting plate 111, and the clamping unit and the sixth connecting plate 111 are in relative sliding. Here, the clamping unit slides towards the direction of the first fixed cavity 114. The clamping unit is provided with a third fixed cavity 132, and the third fixed cavity 132 is used to fix the mutual inductor 17, and the mutual inductor 17 is fixed through the third fixed cavity 132.

[0094] The first driving mechanism 14 is linked with the sixth connecting plate 111. The first driving mechanism 14 drives the sixth connecting plate 111 to reciprocate towards one side of the first fixed cavity 114. Here, the first driving mechanism 14 can be in the form of a cylinder, an oil cylinder, a lead screw drive, etc.

[0095] The fourth driving mechanism A29 is linked with the clamping unit. The fourth driving mechanism A29 drives the clamping unit to reciprocate towards one side of the first fixed cavity 114.

[0096] The first pressing mechanism 12 is used to fix the terminal box unit 15. Here, the first pressing mechanism 12 abuts against the top surface of the terminal box unit 15.

[0097] The terminal box unit 15 is fixed with a switch unit copper terminal 151 and a mutual inductor copper terminal 152. Here, the number of the switch unit copper terminals 151 and the number of the mutual inductor copper terminals 152 can be adjusted according to actual requirements. Due to different phases of the electric meter, their corresponding numbers are different. The switch unit 16 is fixed with a second conductive part 161, and the mutual inductor 17 is fixed with a third conductive part 171. Both the second conductive part 161 and the third conductive part 171 are fixed with welding tabs. The second conductive part 161 is welded to the switch unit copper terminal 151; the third conductive part 171 is welded to the mutual inductor copper terminal 152. When the whole fixture is fixed in place, through the cooperation of the upper electrode and the lower electrode, the effect of welded connection is formed. Here, the welding method is specifically resistance brazing. With this structural arrangement, first, the switch unit 16 and the mutual inductor 17 move relative to the terminal box unit 15, making the cooperation between the switch unit 16, the mutual inductor 17 and the terminal box unit 15 more stable. Moreover, the combined fixing method of the three components forms an automated processing and welding, which can avoid the faults caused by manual operation. The setting of the welding tabs improves the welding quality during the welding process.

[0098] Specifically, as shown in the appendix Figures 2-3As shown, it further includes a bump 115. The bump 115 is fixedly connected to the bottom plate 11. Here, a part of the bump 115 extends into the first concave cavity 113, and the remaining part of the bump 115 extends upward. Specifically, a part of the bump 115 exceeds the top surface of the bottom plate 11. A chute 112 is provided on the side surface of the part of the bump 115 that exceeds the top surface of the bottom plate 11. The chute 112 is provided with a first horizontal groove 1121 and a first inclined groove 1122. The first horizontal groove 1121 is communicated with the first inclined groove 1122. The first inclined groove 1122 is closer to the first fixed cavity 114 than the first horizontal groove 1121. Moreover, the first inclined groove 1122 is inclined downward toward the first fixed cavity 114. Alternatively, the chute 112 can also be directly provided on the side surface of the bottom plate 11. At this time, the bottom plate 11 is an L-shaped structure, and the chute 112 is provided on the side surface of the bottom plate. The sixth connecting plate 111 is provided with a first protrusion 256. The first protrusion 256 is located on the side surface of the sixth connecting plate 111. The first protrusion 256 slides in the chute 112. When the sixth connecting plate 111 slides relative to the bottom plate 11, the first protrusion 256 slides along the chute 112. It should be noted here that the number of the first protrusions 256 is one, which only plays the role of unilateral guiding. Since the contact surfaces of the switch unit 16 and the terminal box unit 15 are not at the same horizontal height as the contact surfaces of the mutual inductor 17 and the terminal box unit 15, that is, the copper terminal 151 of the switch unit and the copper terminal 152 of the mutual inductor are not at the same horizontal height. The first driving mechanism 14 drives the sixth connecting plate 111 to move. When the first protrusion 256 cooperates with the first inclined groove 1122, an action of pressing downward obliquely is formed, so that the welding cooperation between the switch unit 16 and the terminal box unit 15, and between the mutual inductor 17 and the terminal box unit 15 is achieved. In addition, the downward pressing and fixing method here can also be vertical pressing, that is, there are two fixing blocks above the second fixed cavity 131 and the third fixed cavity 132 to realize a vertical pressing and fixing structure. However, the problem with this structure is that the space in the vertical direction is mainly used to place the switch unit 16 and the mutual inductor 17. In the whole automation process, the utilization rate of the upper space is insufficient, and interference is likely to occur, and a good layout cannot be formed. By using the cooperation of the chute 112 and the first protrusion 256 on one side, an effect of pressing downward is cleverly formed. Through the elasticity of the second conductive member 161 and the third conductive member 171 itself, the problem of height difference is solved, so that there is more space above vertically, which is convenient for the work of a manipulator or other devices. The design of the first inclined groove 1122 is simple, delicate and practical.

[0099] Specifically, as shown in the appendix Figures 2-3As shown in the figure, it further includes a positioning bracket A119 and a return spring 120. The positioning bracket A119 is provided with a first U-shaped groove A257 and a first fixing post A105. On both sides of the front arm of the first U-shaped groove A257, a double-sided L-shaped first step opening groove A120 and a second step opening groove A124 are symmetrically arranged. The first step opening groove A120 and the second step opening groove A124 are used for the positioning and support of the third conductive part 171. When the mutual inductor 17 is fixed in the third fixed cavity 132, the number of the third conductive parts 171 is two, and the two third conductive parts 171 are respectively matched with the first step opening groove A120 and the second step opening groove A124. The bottom surface of the positioning bracket A119 is provided with a 7-shaped step surface A123, and the 7-shaped step surface A123 is used for the return spring 120 to tighten the positioning bracket A119 to achieve a limiting effect. The sixth connecting plate 111 is provided with a first opening groove A255 and a second opening groove A118. The positioning bracket A119 is matched with the first opening groove A255 and the second opening groove A118. A linear ball guide is installed between one side surface of the positioning bracket A119 and the first opening groove A255, and a linear ball guide is installed between the other side surface of the positioning bracket A119 and the first opening groove A255 to form a relative sliding effect through the linear ball guide. Here, the positioning bracket A119 is provided with an installation groove A35 for installing the linear ball guide. The positioning bracket A119 slides relative to the sixth connecting plate 111. The clamping unit is fixed on the positioning bracket A119. Since the positioning bracket A119 and the clamping unit are fixed, the sliding effect of the clamping unit relative to the sixth connecting plate 111 is realized. The bottom plate 11 is provided with a second fixing post 105. One end of the return spring 120 is matched with the first fixing post A105, and the other end of the return spring 120 is matched with the second fixing post 105. A fifth connecting plate A32 is fixed on the bottom plate 11, and the fifth connecting plate A32 is matched with the fourth driving mechanism A29. When the bottom plate 11 slides, due to the acting force of the return spring 120, a soft connection effect is formed between the positioning bracket A119 and the bottom plate 11, thereby realizing the driving of the positioning bracket A119. This design of the return spring 120 tension + moving pair mainly aims at the problems that the positioning and clamping and welding of the third conductive part 171 on the mutual inductor 17 cannot be separated in the prior art, and the problem that the positioning bracket A119 is prone to poor welding during the welding process with the copper terminal 152 of the mutual inductor and the third conductive part 171. Through the movement of the positioning bracket A119, a relative movement effect can be formed. The sixth connecting plate 111 is further provided with a third opening groove A126.

[0100] Specifically, as shown in the attached Figures 7-10 figure, the number of the first U-shaped grooves A257 is one or two or three, and each first U-shaped groove A257 is correspondingly fixed with a clamping unit. One clamping unit is correspondingly fixed to one first U-shaped groove A257, and one clamping unit corresponds to one mutual inductor 17. As shown in the attached Figure 3As shown, when the electricity meter is single-phase, the number of the first U-shaped grooves A257 is one. Here, the number of the first opening grooves A255 and the second opening grooves A118 on the sixth connecting plate 111 are both one, forming a corresponding effect. As attached Figure 7 As shown, when the electricity meter is two-phase, the number of the first U-shaped grooves A257 is two. Here, the number of grooves on the sixth connecting plate 111 is three, forming a corresponding effect. As attached Figure 9 As shown, when the electricity meter is three-phase, the number of the first U-shaped grooves A257 is three. Here, the number of grooves on the sixth connecting plate 111 is four, forming a corresponding effect.

[0101] Specifically, as attached Figures 2-3 As shown, it further includes a tenth connecting plate 124. The tenth connecting plate 124 is connected to the bottom plate 11. The tenth connecting plate 124 is provided with a support plate 241. The support plate 241 is provided with a buffer spring hole. A spring is accommodated in the buffer spring hole, and the other end of the spring abuts against the clamping unit. The buffer spring hole is used for the first protrusion 256 to slide along the first inclined groove 1122. The spring buffer rotates and jacks up the clamping unit to prevent overvoltage between the switch unit 16 and the switch unit copper terminal 151, and between the transformer 17 and the transformer copper terminal 152 from causing cracking and excessive extrusion of the solder, resulting in excessive overflow of the solder and insufficient brazing welds.

[0102] Specifically, a first sliding pair 33 is provided between the side wall of the first cavity 113 and the sixth connecting plate 111. The setting of the first sliding pair 33 improves the sliding effect of the sixth connecting plate 111 relative to the bottom plate 11.

[0103] Specifically, as attached Figures 4-6As shown, the clamping unit includes a fixed claw 25 and a rotating claw 26. One end of the rotating claw 26 rotates relative to the fixed claw 25, and the other end of the rotating claw 26 cooperates with the fixed claw 25 to form a third fixed cavity 132. A pressing spring is provided between the fixed claw 25 and the rotating claw 26. The fixed claw 25 is provided with an inner arc 258, and the rotating claw 26 is provided with a first L-shaped step groove 261, a first arc 128, a second arc 129, and a third arc A127, which are connected in sequence. The clamping unit forms the clamping and fixing of the mutual inductor 17. Since the main part of the mutual inductor 17 is annular, the clamping and fixing is formed through the clamping mechanism. Secondly, after the welding is completed, at this time, the terminal box unit 15, the switch unit 16, and the mutual inductor 17 form an integral structure. By rotating the rotating claw 26, the whole can be taken out for the next detection operation, and the operation is highly convenient. Moreover, with this structural setting, the fixing effects of different mutual inductors 17 are formed, and this clamping unit can be applied to the mutual inductors 17 of Southern Power Grid and State Grid. The fixed claw 25 is provided with a driving part. The rotating claw 26 and the fixed claw 25 rotate through a rotating shaft 260, and the driving part elastically presses against the rotating shaft 260. The driving part is provided with a hole for installing the rotating shaft 260. The front end of the fixed claw 25 is provided with an inner arc 258 for pressing and positioning the outer edge of the mutual inductor 17 (not shown in the figure) and conforming to the outer shape of the mutual inductor 17. An outer arc 125 is provided outside the inner arc 258. The rotating claw 26 is provided with a first L-shaped step groove 261 for making way for the communication line of the mutual inductor 17. Connected to the first L-shaped step groove 261 is a first arc 128 with a counterclockwise slope greater than 30 degrees, and the first arc 128 is used for positioning the mutual inductor 17 of State Grid. Adjacent to the first arc 128 is a second arc 129 with a counterclockwise slope greater than 5 degrees. The second arc 129 is used for positioning the mutual inductor 17 of State Grid, and the width of the second arc 129 is greater than the first protruding end arc A129 and the second protruding end arc A1291 of the mutual inductor 17 of State Grid. The second protruding end arc A1291 is adjacent to the first arc 128, the first protruding end arc A129 is adjacent to the third arc A127, and the height of the second protruding end arc A1291 is greater than that of the first protruding end. Adjacent to the second arc 129 is an outer arc 125 of the inclined surface of the mutual inductor 17 of State Grid for tightening and limiting the third arc A127, which is closely fitted with the first arc 128; this limitation can not only ensure the limitation and non-shaking of the mutual inductor 17 of State Grid, but also limit and ensure that the upper conductive pin of the mutual inductor 17 does not shift vertically, horizontally, or in any other direction. The difference between the clamping unit of the mutual inductor 17 of Southern Power Grid and the clamping unit of the mutual inductor 17 of State Grid is that the second protruding end arc A1291 is not provided on the rotating claw 26. This limitation can not only ensure the limitation and non-shaking of the mutual inductor 17 of State Grid, but also limit and ensure that the upper conductive pin of the mutual inductor 17 does not shift vertically, horizontally, or in any other direction.

[0104] Specifically, as shown in the appendixFigures 2-3 As shown, the first pressing mechanism 12 includes a first pressing member 121. The first pressing member 121 rotates horizontally and moves vertically up and down relative to the base plate 11. The first pressing member 121 can rotate in the horizontal direction, and the first pressing member 121 can also move vertically up and down. The vertical up and down movement in this embodiment specifically refers to moving vertically up and down along the Z-axis direction. The first pressing member 121 is used to fix the terminal box unit 15 to prevent the terminal box unit 15 from shaking during the welding process. In the initial state, the first pressing member 121 rotates to the outside of the first fixing cavity 114 so that the terminal box unit 15 can be placed into the first fixing cavity 114. After the terminal box unit 15, the switch unit 16, and the current transformer 17 are placed, the first pressing member 121 will rotate above the terminal box unit 15 and move towards the terminal box unit 15 until it abuts against the terminal box unit 15 to form a fixing effect. Here, how the first pressing mechanism 12 realizes rotation and lifting is specifically achieved through a rotation motor and a lifting motor. This is prior art, so it will not be described in detail in this embodiment.

[0105] Specifically, as shown in the appendix Figures 2-3 As shown, a floating pressure limiting unit 239 is provided at one end of the sixth connecting plate 111 facing the first fixing cavity 114, and a floating pressure opening unit 235 is provided at the end of the sixth connecting plate 111 away from the first fixing cavity 114. The floating pressure limiting unit 239 gives a reverse acting force to the second conductive member 161 to prevent overvoltage between the switch unit 16 and the switch unit copper terminal 151, and between the current transformer 17 and the current transformer copper terminal 152 from causing cracking and excessive extrusion of the solder, resulting in excessive overflow of the solder and insufficient brazing welds. The floating pressure opening unit 235 is to prevent the moving and static contacts inside the switch unit 16 from still being in a connected state during the welding process. If the moving and static contacts inside the switch unit 16 are in a connected state during welding, the large welding current will cause adhesion and melting of the moving and static contacts of the switch unit 16, resulting in jamming of the mechanism, non-power-on of the current transformer 17, etc., and the inability to realize the opening and closing and electricity charge control functions for low-voltage users remotely. By the floating pressure opening unit 235, it is ensured that the moving and static contacts inside the switch unit 16 are in a disconnected state, thereby improving the stability and welding quality of subsequent welding. Here, the floating pressure opening unit 235 cooperates with the first pin 162 on the switch unit 16.

[0106] Specifically, as shown in the appendix Figures 2-3As shown, the floating pressure limit unit 239 includes a 7-shaped clamping plate 243. The 7-shaped clamping plate 243 is connected to one end of the sixth connecting plate 111 close to the first fixed cavity 114. The 7-shaped clamping plate 243 is provided with a second U-shaped groove 244 and a third U-shaped groove 246. Both the second U-shaped groove 244 and the third U-shaped groove 246 are provided with floating jacking components. The floating jacking component is a combination of a spring and a T-shaped sliding column, which is used to prevent the second conductive part 161 on the switch unit 16 from pushing off the solder pad during moving assembly and to prevent too much overflow or insufficient welding of the welded solder pad. On both sides of the lower end of the 7-shaped clamping plate 243, a first through-hole groove 245 and a second through-hole groove 248 are provided, and the left and right positions of the second conductive part 161 on the switch unit 16 are adjusted by screws. The third U-shaped groove 246 communicates with the second relief groove 247 of the second conductive part 161 on the switch unit 16.

[0107] Specifically, as shown in the attached Figures 2-3 As shown, the first fixed cavity 114 is provided with an intermediate groove A132, a first relief groove A136, and a front groove A134. The intermediate groove A132, the first relief groove A136, and the front groove A134 are connected. Through holes 133 are provided at both ends of the front groove A134, and an L-shaped sliding plate is fixed to the through holes 133. The front groove A134 is a support structure for the terminal box unit 15, forming a support and limit effect. The L-shaped sliding plate is installed between the front clamping component A239 and the rear clamping component A121. The front clamping component A239 and the rear clamping component A121 are arranged on both sides of the first fixed cavity 114, close to the second side plate 32, and are used for limiting terminal box units of different manufacturers and specifications.

[0108] Specifically, the 7-shaped clamping plate 243 is adjusted to meet the alignment of the communication 485 signal, active signal, reactive signal, current sampling pin, voltage sampling pin, and the on-off signal pin of the switch unit 16 with the circuit welding holes on the circuit board. It meets the requirements of accurate assembly and welding of the terminal box unit 15, active, reactive, current, voltage, and on-off signal sampling of the switch unit 16 of different specifications and manufacturers with the circuit and external wire pressing, prevents defects such as false soldering, and realizes high-precision signal sampling.

[0109] Specifically, it further includes a second driving mechanism 29 and a buffering mechanism 30. The second driving mechanism 29 drives the fixing device to move up and down. Here, the second driving mechanism 29 drives the bottom plate 11 to move along the first direction, and specifically, the first direction is along the Z-axis direction. In this embodiment, a first side plate 31 is further connected to the side of the bottom plate 11. The second driving mechanism 29 cooperates with the first side plate 31 through a second moving pair A21 to form a motion effect, driving the first side plate 31 to slide vertically up and down. The buffering mechanism 30 cooperates with the bottom plate 11, and the buffering mechanism 30 plays a buffering and positioning effect to prevent the phenomenon of the lower electrode being fractured during the movement of the bottom plate 11. When the terminal box unit 15, the switch unit 16, and the mutual inductor 17 are fixed, there is a certain gap between the lower electrode and the welding position, and specifically, this gap is 10 mm - 15 mm. The copper terminals 151 of the switch unit, the copper terminals 152 of the mutual inductor, the second conductive member 161, and the third conductive member 171 all have a certain elastic effect. During the downward pressing process of the upper electrode, this gap can be compensated to achieve a welding effect. The buffering mechanism 30 is adjustable and includes a screw and a nut. The second side plate 32 is connected to the bottom plate 11. The screw cooperates with the second side plate 32 to form an adjustment effect, and the nut is used for fixing. Here, a buffer member, such as a spring or other elastic member, is also provided at the lower end of the screw. In addition, the second driving mechanism 29 is not limited to vertical up and down sliding. The second driving mechanism 29 can also drive the first side plate 31 to slide back and forth, or drive the first side plate 31 to slide horizontally left and right.

[0110] Specifically, it further includes a third driving mechanism 40 and a fifth driving mechanism 41. The third driving mechanism 40 drives the bottom plate 11 to move along the second direction, and the fifth driving mechanism 41 drives the bottom plate 11 to move along the third direction. The first direction, the second direction, and the third direction are perpendicular to each other in pairs. Here, the first direction is the Z-axis direction, the second direction is the X-axis direction, and the third direction is the Y-axis direction. The second driving mechanism 29, the third driving mechanism 40, and the fifth driving mechanism 41 form driving effects in different directions, that is, they form sliding effects in the three directions of the X-axis, Y-axis, and Z-axis.

[0111] Specifically, it further includes a first connecting plate A20, a second connecting plate A22, a third connecting plate A23, a fourth connecting plate A25, and a seventh connecting plate A33. The third driving mechanism 40 drives the first connecting plate A20 to move, and the third driving mechanism 40 drives the first connecting plate A20 to realize the sliding of the bottom plate 11 in the X-axis direction. The fifth driving mechanism 41 is arranged above the first connecting plate A20. The fifth driving mechanism 41 drives the connection of the second connecting plate A22. The third connecting plate A23 is vertically connected to the second connecting plate A22. The fourth connecting plate A25 is arranged parallel to the second connecting plate A22. The fourth connecting plate A25 is vertically connected to the third connecting plate A23. The seventh connecting plate A33 is vertically connected to the bottom plate 11. The seventh connecting plate A33 is respectively connected to the third connecting plate A23 and the second connecting plate A22. Through the cooperation between multiple connecting plates, a certain connection strength is formed to meet the movement in different directions. It should also be noted that the second driving mechanism 29 is arranged on the fourth connecting plate A25.

[0112] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A welding fixture for sampling components of a high-precision intelligent electricity meter, characterized in that, Including: A bottom plate (11), the bottom plate (11) is provided with a first concave cavity (113) and a first fixing cavity (114), and the first fixing cavity (114) is used for fixing a terminal box unit (15); A sixth connecting plate (111), the sixth connecting plate (111) is accommodated in the first concave cavity (113), and the sixth connecting plate (111) slides relative to the first concave cavity (113); the sixth connecting plate (111) is provided with a second fixing cavity (131), and the second fixing cavity (131) is used for fixing a switch unit (16); A clamping unit, the clamping unit is slidably connected to the sixth connecting plate (111), and the clamping unit is provided with a third fixing cavity (132), and the third fixing cavity (132) is used for fixing an instrument transformer (17); A first driving mechanism (14), the first driving mechanism (14) is linked with the sixth connecting plate (111), and the first driving mechanism (14) drives the sixth connecting plate (111) to reciprocate toward the side of the first fixing cavity (114); A fourth driving mechanism (A29), the fourth driving mechanism (A29) is linked with the clamping unit, and the fourth driving mechanism (A29) drives the clamping unit to reciprocate toward the side of the first fixing cavity (114); A first pressing mechanism (12), the first pressing mechanism (12) is used for fixing the terminal box unit (15); The terminal box unit (15) is fixed with a switch unit copper terminal (151) and an instrument transformer copper terminal (152), the switch unit (16) is fixed with a second conductive part (161), the instrument transformer (17) is fixed with a third conductive part (171), and both the second conductive part (161) and the third conductive part (171) are fixed with welding pads; the second conductive part (161) is welded to the switch unit copper terminal (151); the third conductive part (171) is welded to the instrument transformer copper terminal (152).

2. The welding fixture for the sampling element of the high-precision intelligent electric meter according to claim 1, characterized in that The bottom plate (11) is provided with a chute (112), the chute (112) is provided with a first horizontal groove (1121) and a first inclined groove (1122), the first horizontal groove (1121) is communicated with the first inclined groove (1122), the sixth connecting plate (111) is provided with a first protrusion (256), and the first protrusion (256) slides in the chute (112); or, it further includes a convex block (115), the convex block (115) is connected to the bottom plate (11), the convex block (115) is provided with a chute (112), the chute (112) is provided with a first horizontal groove (1121) and a first inclined groove (1122), the first horizontal groove (1121) is communicated with the first inclined groove (1122), and the sixth connecting plate (111) is provided with a first protrusion (256), and the first protrusion (256) slides in the chute (112).

3. The welding fixture for the sampling element of the high-precision intelligent electric meter according to claim 1, characterized in that, It further includes a positioning frame (A119) and a return spring (120). The positioning frame (A119) is provided with a first U-shaped groove (A257) and a first fixing post (A105). On both sides of the front arm of the first U-shaped groove (A257), a double-sided L-shaped first stepped opening groove (A120) and a second stepped opening groove (A124) are symmetrically arranged. The first stepped opening groove (A120) and the second stepped opening groove (A124) are used for positioning and supporting a third conductive member (171). A 7-shaped stepped surface (A123) is arranged on the bottom surface of the positioning frame (A119); the sixth connecting plate (111) is provided with a first opening groove (A255) and a second opening groove (A118). A linear ball guide is installed between one side surface of the positioning frame (A119) and the first opening groove (A255), and a linear ball guide is installed between the other side surface of the positioning frame (A119) and the first opening groove (A255); the positioning frame (A119) slides relative to the sixth connecting plate (111), and the clamping unit is fixed on the positioning frame (A119); the bottom plate (11) is provided with a second fixing post (105). One end of the return spring (120) is matched with the first fixing post (A105), and the other end of the return spring (120) is matched with the second fixing post (105).

4. The welding fixture for the sampling element of the high-precision intelligent electric meter according to claim 3, characterized in that, The number of the first U-shaped grooves (A257) is one or two or three, and each of the first U-shaped grooves (A257) is correspondingly fixed with a clamping unit.

5. The welding fixture for the sampling element of the high-precision intelligent electric meter according to claim 1, characterized in that, It further includes a tenth connecting plate (124). The tenth connecting plate (124) is connected to the bottom plate (11). The tenth connecting plate (124) is provided with a support plate (241). The support plate (241) is provided with a buffer spring hole, and a spring is accommodated in the buffer spring hole. The other end of the spring abuts against the clamping unit.

6. The welding fixture for sampling elements of the high-precision intelligent electric meter according to claim 1, characterized in that A first sliding pair (33) is arranged between the side wall of the first cavity (113) and the sixth connecting plate (111).

7. The welding fixture for the sampling element of the high-precision intelligent electric meter according to claim 1, wherein The clamping unit includes a fixed claw (25) and a rotating claw (26). One end of the rotating claw (26) rotates relative to the fixed claw (25), and the other end of the rotating claw (26) cooperates with the fixed claw (25) to form a third fixing cavity (132); a pressing spring is arranged between the fixed claw (25) and the rotating claw (26). The fixed claw (25) is provided with an inner arc (258). The rotating claw (26) is provided with a first L-shaped stepped groove (261), a first arc (128), a second arc (129), and a third arc (A127). The first L-shaped stepped groove (261), the first arc (128), the second arc (129), and the third arc (A127) are connected in sequence.

8. The welding fixture for the sampling element of the high-precision intelligent electric meter according to claim 1, characterized in that, The first pressing mechanism (12) includes a first pressing member (121). The first pressing member (121) rotates horizontally and moves vertically up and down relative to the bottom plate (11).

9. The welding fixture for the sampling element of the high-precision intelligent electric meter according to claim 1, characterized in that, A floating pressure limiting unit (239) is provided at one end of the sixth connecting plate (111) facing the first fixed cavity (114), and a floating pressure opening unit (235) is provided at one end of the sixth connecting plate (111) away from the first fixed cavity (114).

10. The welding fixture for the sampling element of the high-precision intelligent electric meter according to claim 9, characterized in that, The floating pressure limiting unit (239) includes a 7-type card plate (243), and the 7-type card plate (243) is connected to one end of the sixth connecting plate (111) close to the first fixed cavity (114). The 7-type card plate (243) is provided with a second U-shaped groove (244) and a third U-shaped groove (246). The second U-shaped groove (244) and the third U-shaped groove (246) are both provided with a floating lifting assembly, and the floating lifting assembly is a combination of a spring and a T-shaped sliding column.

11. The welding fixture for the sampling element of the high-precision intelligent electric meter according to claim 1, characterized in that , also includes a front locking component (A239) and a rear locking component (A121), the first fixed cavity (114) is provided with an intermediate groove (A132), a first giving way groove (A136) and a front groove (A134), the intermediate groove (A132), the first giving way groove (A136) and the front groove (A134) are connected, and through holes (133) are provided at both ends of the front groove (A134), and an L-shaped slide is fixed to the through hole (133), and the L-shaped slide is installed between the front locking component (A239) and the rear locking component (A121).

12. The welding fixture for the sampling element of the high-precision intelligent electric meter according to claim 1, characterized in that, It also includes a second driving mechanism (29) and a buffer mechanism (30), wherein the second driving mechanism (29) drives the bottom plate (11) to move along a first direction, and the buffer mechanism (30) cooperates with the bottom plate (11), and the buffer mechanism (30) is adjustable.

13. The welding fixture for the sampling element of the high-precision intelligent electric meter according to claim 12, characterized in that, It also includes a third driving mechanism (40) and a fifth driving mechanism (41), wherein the third driving mechanism (40) drives the bottom plate (11) to move along the second direction, and the fifth driving mechanism (41) drives the bottom plate (11) to move along the third direction, and the first direction, the second direction, and the third direction are arranged perpendicularly in pairs.

14. The welding fixture for the sampling element of the high-precision intelligent electric meter according to claim 13, characterized in that It also includes a first connecting plate (A20), a second connecting plate (A22), a third connecting plate (A23), a fourth connecting plate (A25), and a seventh connecting plate (A33); the third driving mechanism (40) drives the first connecting plate (A20) to move; the fifth driving mechanism (41) is arranged above the first connecting plate (A20); the fifth driving mechanism (41) drives the second connecting plate (A22) to connect; the third connecting plate (A23) is vertically connected to the second connecting plate (A22); the fourth connecting plate (A25) is arranged parallel to the second connecting plate (A22); the fourth connecting plate (A25) is vertically connected to the third connecting plate (A23); the seventh connecting plate (A33) is vertically connected to the bottom plate (11); and the seventh connecting plate (A33) is respectively connected to the third connecting plate (A23) and the second connecting plate (A22).

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