A trigger workpiece welding tool for electrical switch contact commutation
By designing a welding fixture for triggering workpieces used for switching electrical switch contacts, precise positioning and stable fixing of the square shaft and the linkage plate were achieved, solving the problem of perpendicularity control during the welding process, improving welding quality and production efficiency, and adapting to diverse workpiece requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN CITY BAILI TIANDI ELECTRIC COMPLEMENT
- Filing Date
- 2025-06-09
- Publication Date
- 2026-06-02
AI Technical Summary
Existing technologies make it difficult to precisely control the perpendicularity of the square shaft to the linkage plate when welding the triggering workpiece for the switching of electrical switch contacts, resulting in low production efficiency and difficulty in ensuring product size consistency.
A welding fixture for triggering workpieces used for switching electrical switch contacts is adopted, including a clamping assembly, a clamping component, and a turntable assembly. By precisely positioning and fixing the square shaft, the linkage plate, and the trigger lever, it is ensured that the axis of the square shaft is perpendicular to the positioning reference plane of the linkage plate. Adjustable clamping force and rolling components are used to improve welding stability.
It improves welding accuracy and production efficiency, reduces welding defects, ensures the dimensional consistency and reliability of triggered workpieces, adapts to the positioning and clamping of workpieces of different specifications, and supports automated production.
Smart Images
Figure CN224309928U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of electrical component processing technology, and in particular relates to a welding fixture for triggering workpieces for switching electrical switch contacts. Background Technology
[0002] The contact reversing action of the electrical switch is achieved by a precision trigger mechanism. This mechanism mainly consists of three parts: a square shaft, a linkage plate, and a trigger lever. Its structural features are as follows: the linkage plate has insertion holes, and the end of the square shaft is inserted into the corresponding insertion hole on the linkage plate, with secure four-sided welding at the insertion point—that is, welding is performed on all four sides of the insertion point between the square shaft and the linkage plate. Simultaneously, the trigger lever itself is also welded and fixed to the side wall of the linkage plate. When the operator needs to switch the switch direction, they rotate the square shaft with a wrench, which in turn drives the rigidly connected linkage plate and trigger lever to rotate synchronously. The rotation of the trigger lever drives the contacts to close or open, thereby realizing the contact reversing function of the electrical switch.
[0003] However, the special structure of the triggering workpiece places stringent requirements on its manufacturing precision: during the welding assembly process, the perpendicularity between the axis of the square shaft and the end face of the linkage plate must be ensured. Currently, the commonly used welding method involves clamping the workpiece in a vise. This method has significant drawbacks: firstly, when welding on all four sides at the insertion point of the square shaft and the linkage plate, it is difficult to precisely control and maintain the perpendicularity of the square shaft relative to the end face of the linkage plate; more importantly, to ensure critical perpendicularity and necessary assembly dimensional parameters (such as the extension length of the square shaft), operators must frequently use calipers for manual measurement and repeated adjustments. These factors not only significantly reduce production efficiency but also make it difficult to reliably guarantee the dimensional consistency and geometric accuracy of the final product. Summary of the Invention
[0004] To address the problems existing in the prior art, this utility model provides a welding fixture for triggering workpieces used for switching electrical switch contacts. It can accurately position and firmly fix the square shaft and the linkage plate, ensuring that the axis of the square shaft is perpendicular to the positioning reference surface of the linkage plate, thereby effectively improving the perpendicularity accuracy when welding the square shaft and the linkage plate.
[0005] This utility model is implemented as follows: a welding fixture for a triggering workpiece for reversing electrical switch contacts, the triggering workpiece includes a square shaft, a linkage plate and a triggering lever, and the welding fixture includes a clamp assembly for fixing the triggering workpiece.
[0006] The fixture assembly includes a base plate and a top plate arranged in parallel intervals. The base plate is provided with a fixing hole for fixing the lower end of the square shaft. The top plate, relative to the fixing hole, is provided with a through hole for the upper end of the square shaft to pass through. The upper surface of the base plate is the positioning reference surface of the linkage plate. A limiting component for fixing the linkage plate is provided on the positioning reference surface. The axis of the square shaft is perpendicular to the positioning reference surface of the linkage plate.
[0007] The base plate located at the linkage plate positioning position is provided with a plug slot for inserting the trigger lever, and a positioning block for fixing the trigger lever is provided in the plug slot.
[0008] Furthermore, the fixture assembly is equipped with a clamping component for pressing the square shaft. This clamping component includes a clamping bracket mounted on the top plate, a threaded sleeve within the clamping bracket, and a clamping screw within the threaded sleeve for applying pressure to the upper end of the square shaft. When the clamping screw rotates within the threaded sleeve, it precisely applies downward pressure to the upper end of the square shaft. This pressure effectively prevents the square shaft from shaking or shifting due to external forces during welding, ensuring the axial stability of the square shaft throughout the welding process and further improving welding accuracy. This plays a crucial role in ensuring the perpendicularity of the square shaft to the end face of the linkage plate and triggering the overall quality of the workpiece. By rotating the clamping screw, the clamping stroke and clamping force can be flexibly adjusted. Operators can easily adjust the pressure of the clamping screw on the square shaft according to the workpiece size and welding process requirements to adapt to different welding scenarios and workpiece characteristics, ensuring the stability and reliability of the welding process while avoiding damage to the square shaft due to excessive pressure. A good clamping effect helps reduce weld defects caused by square shaft displacement during welding. A stable welding environment allows for more uniform and robust weld formation, thereby improving the welding quality of the triggering workpiece and enhancing its reliability and service life during the switching process of electrical switch contacts.
[0009] Furthermore, a turntable assembly is provided below the fixture assembly. The turntable assembly includes a chassis and a base mounted on the chassis. A rolling assembly is fitted onto the base, and a connecting seat is fitted onto the rolling assembly and connected to the lower end face of the base plate. With the turntable assembly, the operator can easily rotate the entire fixture assembly during welding operations, thus easily performing welding operations on different welding parts of the square shaft, linkage plate, and trigger lever. This allows the operator to complete multi-angle welding operations on the triggered workpiece in a single clamping, reducing time lost due to frequent adjustments of tooling and welding angles, thereby significantly improving production efficiency. The use of the rolling assembly makes the fixture assembly more stable during rotation, effectively reducing welding defects caused by tooling wobbling or displacement, thereby improving the welding quality and consistency of the triggered workpiece.
[0010] Furthermore, an adjusting screw is radially inserted through the connecting seat, and the limiting end of the adjusting screw can abut against the base. This precisely limits the position of the turntable assembly during the welding process, ensuring its stability at all times. During welding operations, the limiting screw can firmly abut against the base, thereby preventing unnecessary displacement or shaking of the turntable assembly due to external forces or operational errors. This stable fixing method provides a solid and reliable platform for welding operations, resulting in more uniform and dense weld formation and effectively avoiding welding defects caused by unstable tooling.
[0011] Furthermore, the through hole is an elongated structure with a right-angled groove at the side of the through hole away from the top plate. A first mounting channel is provided within the top plate along the length of the through hole, located at the through hole position. A first positioning clamp is provided within the first mounting channel, and the first positioning clamp can reciprocate linearly along the first mounting channel. A first V-groove is provided on the first positioning clamp facing the right-angled groove. The first V-groove and the right-angled groove form a clamping space for holding the upper end of the square shaft. The elongated hole structure and the movable first positioning clamp design make the installation and removal of the square shaft more convenient and quick. Operators can easily insert the upper end of the square shaft into the through hole and quickly clamp and fix the square shaft by adjusting the position of the first positioning clamp, without complicated operating steps and tools, thus improving the efficiency of welding work. The first positioning clamp can reciprocate linearly along the first mounting channel and can be flexibly adjusted according to the actual size of the upper end of the square shaft, adapting to square shafts of different diameters and shapes, ensuring effective clamping of square shafts of various specifications, and enhancing the versatility and adaptability of the welding fixture. The first positioning clamp can move along the first installation channel. By adjusting its position, the size of the clamping space can be changed, thereby flexibly controlling the clamping force on the square shaft. The operator can adjust the clamping force appropriately according to the material and welding requirements of the square shaft to avoid damage to the square shaft due to excessive clamping force or loosening of the square shaft due to insufficient clamping force.
[0012] Furthermore, a second mounting channel is provided within the bottom plate at the lower end of the fixing hole. A second positioning clamp is provided within the second mounting channel. The second positioning clamp can reciprocate linearly along the second mounting channel. A second V-groove is provided on the second positioning clamp facing the fixing hole. The second V-groove and the fixing hole form a clamping space for clamping the lower end of the square shaft. The position of the second positioning clamp can be adjusted according to the actual size of the lower end of the square shaft, flexibly adapting to square shafts of different diameters, ensuring effective clamping of square shafts of various specifications, and enhancing the versatility and adaptability of the welding fixture.
[0013] The clamping space formed by the second V-groove and the fixing hole securely clamps the lower end of the square shaft, which works in conjunction with the clamping of the upper end of the square shaft at the top plate to form a stable fixation at both ends, effectively preventing the square shaft from shifting due to factors such as welding heat stress during the welding process.
[0014] Furthermore, the positioning block can move along the insertion slot, and a third installation channel is provided in the bottom plate at the lower end of the insertion slot. A pushing block is provided in the third installation channel, and the pushing block can reciprocate linearly along the third installation channel. The positioning block is fixedly installed on the upper surface of the pushing block. The positioning block can move along the insertion slot and can be flexibly adjusted according to the actual insertion position and size of the trigger pin, ensuring a tight fit between the positioning block and the trigger pin, thereby improving the stability of the trigger pin's fixation. The pushing block can reciprocate linearly along the third installation channel. By pushing the block to drive the positioning block to move, the position of the positioning block can be precisely controlled, achieving accurate positioning and stable clamping of the trigger pin, ensuring the accurate positioning of the trigger pin during the welding process and improving welding quality. The structural design allows operators to quickly insert the trigger pin into the insertion slot and fix it by adjusting the position of the positioning block, eliminating the need for complex operations and tedious positioning processes, greatly improving the efficiency of welding work. The mobility of the positioning block allows this welding fixture to adapt to trigger pins of different sizes and shapes, improving the versatility and adaptability of the equipment, eliminating the need to replace the positioning block with a special one for each specification of trigger pin.
[0015] Furthermore, a support shaft is provided between the top plate and the bottom plate. This effectively enhances the rigidity of the entire fixture assembly, preventing the top and bottom plates from bending or deforming under stress. The support shaft disperses the stress between the top and bottom plates, reducing local stress concentration, thereby improving the load-bearing capacity of the welding fixture and enabling it to withstand greater welding loads.
[0016] Furthermore, tie rods are installed at the four corners of both the top and bottom plates, with each end of the tie rod penetrating the top and bottom plates respectively and secured with nuts. The tie rods at the four corners of the top and bottom plates form a stable frame, enhancing the stability and rigidity of the fixture assembly. Even under external forces or welding stress, the relative position of the top and bottom plates remains stable, providing a stable foundation for the welding process. The tie rods distribute the force on the top and bottom plates to the four corners, preventing stress concentration. This allows for precise control of the levelness between the top and bottom plates, maintaining the stability and accuracy of the tooling during welding.
[0017] Furthermore, the limiting component includes a fixing component and a pressing component. The linkage plate is provided with a positioning elongated hole. During the positioning process, the fixing component cooperates with the positioning elongated hole to limit the horizontal direction of the linkage plate. The pressing part of the pressing component abuts against the upper end of the linkage plate to limit the vertical direction of the linkage plate. Through the coordinated action of the fixing and clamping components, the linkage plate is limited in both horizontal and vertical directions, forming a stable limiting structure. This structure effectively resists various forces generated during welding, ensuring the stability of the linkage plate throughout the welding process. It prevents loosening or displacement due to external forces, thus improving the reliability of welding quality. During positioning, the alignment holes on the linkage plate and the fixing components work together easily and quickly, allowing operators to install the linkage plate without complex positioning tools or cumbersome procedures, saving assembly time and improving production efficiency. The clamping component's pressing part abuts against the upper surface of the linkage plate, allowing for vertical positioning through a simple clamping operation. This convenient and quick operation, along with easily controllable and adjustable clamping force, adapts to linkage plates of different thicknesses and materials, meeting diverse production needs.
[0018] The advantages and technical effects of this utility model are as follows: By adopting the above technical solution, the square shaft and the linkage plate can be accurately positioned and firmly fixed, ensuring that the axis of the square shaft is perpendicular to the positioning reference surface of the linkage plate. This effectively improves the perpendicularity accuracy when welding the square shaft and the linkage plate, and solves the problem of difficulty in accurately controlling perpendicularity in traditional welding methods. By fixing the lower end of the square shaft in the fixing hole of the base plate, passing the upper end through the through hole of the top plate, and positioning and fixing the linkage plate on the positioning reference surface of the base plate, the three points form a plane and constrain each other, forcibly ensuring that the axis of the square shaft is strictly perpendicular to the positioning reference surface (i.e., its mounting end face) of the linkage plate.
[0019] The insertion slots and positioning blocks on the base plate can accurately fix the position of the trigger lever, ensuring the welding accuracy and positional relationship between the trigger lever and the linkage plate, so that the trigger lever can accurately perform its function of driving the contacts to close or open after welding.
[0020] Because the tooling can precisely position and fix the square shaft and linkage plate, operators no longer need to frequently use calipers for manual measurement and repeated adjustments, greatly saving measurement and adjustment time and improving welding efficiency. It can reliably guarantee the dimensional consistency and geometric accuracy of the triggered workpieces, ensuring that each triggered workpiece maintains high quality and consistency during mass production. This facilitates automated production and assembly line operations, further improving overall production efficiency.
[0021] The fixing and positioning function of the tooling makes the welding process more stable and can effectively avoid welding defects caused by factors such as workpiece shaking and displacement, such as incomplete welding, missing welding, and uneven weld seam, thereby improving the welding quality and consistency of the triggered workpiece. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present utility model;
[0023] Figure 2 This is a schematic diagram of the triggering workpiece structure provided in an embodiment of the present invention;
[0024] Figure 3 This is a schematic diagram of the fixture assembly structure provided in this embodiment of the utility model;
[0025] Figure 4 This is a schematic diagram of the top plate provided in an embodiment of the present utility model;
[0026] Figure 5 This is a schematic diagram of the internal structure of the base plate provided in this embodiment of the utility model;
[0027] Figure 6 This is a schematic diagram of the positioning reference surface on the base plate provided in this embodiment of the utility model;
[0028] Figure 7 This is a schematic diagram of the compression assembly structure provided in an embodiment of the present invention;
[0029] Figure 8 This is a schematic diagram of the turntable assembly structure provided in this embodiment of the utility model;
[0030] Figure 9 This is provided by the embodiment of the present utility model. Figure 8 Sectional view AA.
[0031] In the diagram: 1. Triggering workpiece; 1-1. Square shaft; 1-2. Linkage plate; 1-3. Trigger lever; 1-4. Positioning elongated hole; 2. Fixture assembly; 2-1. Top plate; 2-2. Bottom plate; 2-3. Fixing hole; 2-4. Through hole; 2-5. Limiting component; 2-6. Insertion slot; 2-7. Positioning block; 2-8. Support shaft; 2-9. Pull rod; 2-10. Top cover plate; 2-11. Right-angle groove; 2-12. First mounting channel; 2-13. First positioning clamp; 2-14. First V-groove; 2-15. First screw; 2-16. 1. Mounting slot; 2-17. Second mounting channel; 2-18. Second positioning clamp; 2-19. Second V-groove; 2-20. Second screw; 2-21. Third mounting channel; 2-22. Push block; 2-23. Third screw; 2-24. Fixing component; 2-25. Clamping component; 3. Pressing assembly; 3-1. Pressing bracket; 3-2. Internal threaded sleeve; 3-3. Pressing screw; 3-4. Rotating handle; 4. Turntable assembly; 4-1. Chassis; 4-2. Base; 4-3. Connecting seat; 4-4. Adjusting screw; 4-5. Rolling assembly. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.
[0033] It should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0034] like Figures 1 to 3As shown in the embodiment of this application, a welding fixture for a trigger workpiece used for reversing electrical switch contacts is provided. The trigger workpiece 1 includes a square shaft 1-1, a linkage plate 1-2, and a trigger lever 1-3. The welding fixture includes a clamp assembly 2 for fixing the trigger workpiece 1. The clamp assembly 2 includes a bottom plate 2-2 and a top plate 2-1 arranged parallel to each other. The bottom plate 2-2 is provided with a fixing hole 2-3 for fixing the lower end of the square shaft 1-1. The top plate 2-1, relative to the fixing hole 2-3, is provided with a through hole 2-4 for the upper end of the square shaft 1-1 to pass through. The upper end surface of the bottom plate 2-2 is the positioning reference surface of the linkage plate 1-2. A limiting component 2-5 for fixing the linkage plate 1-2 is provided on the positioning reference surface. The limiting component 2-5 will link the linkage plate 1-2. Plate 1-2 is fixed on the reference surface, ensuring that the insertion hole on the linkage plate 1-2 is concentric with the fixing hole 2-3. The axis of the square shaft 1-1 is perpendicular to the positioning reference surface of the linkage plate 1-2. Specifically, both the fixing hole 2-3 and the through hole 2-4 are provided with right-angled grooves 2-11. The edges where the two right-angled surfaces of the right-angled grooves 2-11 of the fixing hole 2-3 and the right-angled grooves 2-11 of the through hole 2-4 intersect are collinear, ensuring that the axis of the square shaft 1-1 is perpendicular to the positioning reference surface of the linkage plate 1-2. The base plate 2-2 located at the positioning position of the linkage plate 1-2 is provided with an insertion slot 2-6 for inserting the trigger lever 1-3. A positioning block 2-7 for fixing the trigger lever 1-3 is provided in the insertion slot 2-6. During welding, the linkage plate 1-2 is placed on the positioning reference surface of the base plate 2-2, and the linkage plate 1-2 is fixed by the limiting component 2-5 to ensure that the insertion hole on the linkage plate 1-2 is concentric with the fixing hole 2-3; first, the upper end of the square shaft 1-1 passes through the through hole 2-4 through the top plate 2-1, and then the lower end of the square shaft 1-1 passes through the insertion hole of the linkage plate 1-2 and is inserted into the fixing hole 2-3 of the base plate 2-2; the trigger lever 1-3 is inserted into the insertion slot 2-6 on the base plate 2-2 and fixed by the positioning block 2-7.
[0035] Preferably, a support shaft 2-8 is provided between the top plate 2-1 and the bottom plate 2-2. This effectively enhances the rigidity of the entire fixture assembly 2, preventing the top plate 2-1 and bottom plate 2-2 from bending or deforming under stress. In use, support shafts 2-8 of different lengths can be replaced according to specific machining dimensions to meet machining requirements. The support shaft 2-8 can disperse the stress between the top plate 2-1 and the bottom plate 2-2, reducing local stress concentration, thereby improving the load-bearing capacity of the welding fixture and enabling it to withstand greater welding loads.
[0036] Preferably, tie rods 2-9 are provided at the four corners of the top plate 2-1 and the bottom plate 2-2, respectively. The two ends of each tie rod 2-9 pass through the top plate 2-1 and the bottom plate 2-2 and are secured with nuts. When it is necessary to adjust the distance between the top plate 2-1 and the bottom plate 2-2 or to adjust their levelness, the nuts are loosened to adjust the distance or levelness of the top plate 2-1 and / or the bottom plate 2-2. After adjustment, the nuts are tightened to secure them. The tie rods 2-9, located at the four corners of the top plate 2-1 and the bottom plate 2-2, form a stable frame, improving the stability and rigidity of the clamp assembly 2. Even when subjected to external forces or welding stress, it can ensure the relative position stability of the top plate 2-1 and the bottom plate 2-2, providing a stable foundation for the welding process; the tie rod 2-9 can distribute the force on the top plate 2-1 and the bottom plate 2-2 to the four corners to avoid stress concentration; it can achieve fine control of the level between the top plate 2-1 and the bottom plate 2-2 to maintain the stability and accuracy of the tooling during welding.
[0037] In one embodiment, such as Figure 4As shown, the through hole 2-4 is an elongated hole structure. A right-angled groove 2-11 is provided at the through hole 2-4 away from the side of the top plate 2-1. A first installation channel 2-12 is provided in the top plate 2-1 located at the position of the through hole 2-4 along the length direction of the through hole 2-4. A first positioning clamp 2-13 is provided in the first installation channel 2-12. The first positioning clamp 2-13 can reciprocate linearly along the first installation channel 2-12. Specifically, a first screw 2-15 is provided on the first positioning clamp 2-13 away from the side of the right-angled groove 2-11. A first snap-fit groove is provided on the first positioning clamp 2-13. A first snap-fit part is provided at the connecting end of the first screw 2-15. The first snap-fit part is rotatably disposed in the first snap-fit groove. A threaded hole is provided in the top plate 2-1. The first screw 2-15 is provided with external threads and mates with the threaded hole. The free end of the first screw 2-15 extends outward through the top plate 2-1. Rotating the first screw 2-15 causes the first positioning clamp 2-13 to reciprocate linearly within the first mounting channel 2-12 through its engagement with the threaded hole. A first V-groove 2-14 is provided on the first positioning clamp 2-13 facing the right-angled groove 2-11. The first V-groove 2-14 and the right-angled groove 2-11 form a clamping space for holding the upper end of the square shaft 1-1. During welding, rotating the first screw 2-15 causes the first positioning clamp 2-13 to move linearly within the first mounting channel 2-12 through its engagement with the threaded hole. This allows the first V-groove 2-14 of the first positioning clamp 2-13 to clamp the upper end of the square shaft 1-1, providing radial clamping force. The elongated hole structure and the movable first positioning clamp 2-13 design make the installation and removal of the square shaft 1-1 more convenient and quick. Operators can easily insert the upper end of the square shaft 1-1 into the through hole 2-4 and quickly clamp and fix the square shaft 1-1 by adjusting the position of the first positioning clamp 2-13, without complicated operating steps and tools, thus improving the efficiency of welding work. The first positioning clamp 2-13 can move linearly back and forth along the first mounting channel 2-12, and can be flexibly adjusted according to the actual size of the upper end of the square shaft 1-1 to adapt to square shafts 1-1 of different diameters and shapes, ensuring effective clamping of square shafts 1-1 of various specifications, and enhancing the versatility and adaptability of welding fixtures. The first positioning clamp 2-13 can move along the first mounting channel 2-12, and by adjusting its position, the size of the clamping space can be changed, thereby flexibly controlling the clamping force on the square shaft 1-1. Operators can appropriately adjust the clamping force according to the material of the square shaft 1-1 and the welding requirements to avoid damage to the square shaft 1-1 due to excessive clamping force or loosening of the square shaft 1-1 due to insufficient clamping force.
[0038] Preferably, a first mounting groove 2-16 is provided on the upper surface of the top plate 2-1 located at the through hole 2-4, and a top cover plate 2-10 is provided within the first mounting groove 2-16. The top cover plate 2-10 is installed within the first mounting groove 2-16 of the top plate 2-1, effectively preventing internal components such as the first positioning clamp 2-13 from loosening or shifting due to vibration or external force during welding. This structure enhances the overall stability of the welding fixture, ensuring the reliability and safety of internal components during welding operations.
[0039] In yet another embodiment, such as Figure 5 As shown, a second mounting channel 2-17 is connected to the bottom plate 2-2 at the lower end of the fixing hole 2-3. A second positioning clamp 2-18 is provided in the second mounting channel 2-17. The second positioning clamp 2-18 can reciprocate linearly along the second mounting channel 2-17. Specifically, a second screw 2-20 is provided on the second positioning clamp 2-18 away from the fixing hole 2-3. A second snap-fit groove is provided on the second positioning clamp 2-18. A second snap-fit part is provided at the connecting end of the second screw 2-20. The second snap-fit part is rotatably disposed in the second snap-fit groove. A threaded hole is provided in the bottom plate 2-2. An external thread is provided on the second screw 2-20 and it mates with the threaded hole. The free end of the second screw 2-20 extends outward through the bottom plate 2-2. Rotating the second screw 2-20 causes the second positioning clamp 2-18 to reciprocate linearly within the second mounting channel 2-17 through its engagement with the threaded hole. A second V-groove 2-19 is provided on the second positioning clamping plate 2-18 facing the fixing hole 2-3. The second V-groove 2-19 and the fixing hole 2-3 form a clamping space for clamping the lower end of the square shaft 1-1. During welding, the second screw 2-20 is rotated. The second screw 2-20, through its engagement with the threaded hole, drives the second positioning clamping plate 2-18 to move linearly within the second mounting channel 2-17. This causes the second V-groove 2-19 of the second positioning clamping plate 2-18 to clamp the lower end of the square shaft 1-1, providing radial clamping force to the lower end of the square shaft 1-1. The position of the second positioning clamping plate 2-18 can be adjusted according to the actual size of the lower end of the square shaft 1-1, flexibly adapting to square shafts 1-1 of different diameters, ensuring effective clamping of square shafts 1-1 of various specifications, and enhancing the versatility and adaptability of the welding fixture.
[0040] The clamping space formed by the second V-groove and the fixing hole 2-3 securely clamps the lower end of the square shaft 1-1, which cooperates with the clamping of the upper end of the square shaft 1-1 at the top plate 2-1 to form a stable fixation at both ends, effectively preventing the square shaft 1-1 from shifting due to factors such as welding heat stress during the welding process.
[0041] In yet another embodiment, such as Figure 5As shown, the positioning block 2-7 can move along the insertion slot 2-6. A third mounting channel 2-21 is connected to the bottom plate 2-2 at the lower end of the insertion slot 2-6. A pushing block 2-22 is provided within the third mounting channel 2-21. The pushing block 2-22 can reciprocate linearly along the third mounting channel 2-21. Specifically, a third screw 2-23 is provided on the pushing block 2-22, and a third snap-fit groove is provided on the pushing block 2-22. A third snap-fit part is provided at the connecting end of the third screw 2-23, and the third snap-fit part is rotatably disposed within the third snap-fit groove. A threaded hole is provided within the bottom plate 2-2, and an external thread is provided on the third screw 2-23, which mates with the threaded hole. The free end of the third screw 2-23 extends outward through the bottom plate 2-2. Rotating the third screw 2-23 causes the push block 2-22 to reciprocate linearly within the third mounting channel 2-21 through its engagement with the threaded hole. The positioning block 2-7 is fixedly mounted on the upper end face of the push block 2-22. During welding, rotating the third screw 2-23 causes the push block 2-22 to move linearly within the third mounting channel 2-21 through its engagement with the threaded hole, thereby clamping the trigger lever 1-3 with the positioning block 2-7 on the push block 2-22, providing clamping force between the trigger lever 1-3 and the linkage plate 1-2.
[0042] Positioning block 2-7 can move along the insertion slot 2-6, and can be flexibly adjusted according to the actual insertion position and size of trigger lever 1-3, ensuring that positioning block 2-7 and trigger lever 1-3 fit tightly, thereby improving the stability of trigger lever 1-3 fixation; pushing block 2-22 can move linearly back and forth along the third installation channel 2-21. By pushing block 2-22 to drive positioning block 2-7 to move, the position of positioning block 2-7 can be precisely controlled, realizing accurate positioning and stable clamping of trigger lever 1-3, ensuring accurate positioning of trigger lever 1-3 during welding process, and improving welding quality; the structural design allows operators to quickly insert trigger lever 1-3 into insertion slot 2-6 and fix it by adjusting the position of positioning block 2-7, without complicated operation and tedious positioning process, greatly improving the efficiency of welding work; the mobility of the positioning block allows the welding fixture to adapt to trigger levers 1-3 of different sizes and shapes, improving the versatility and adaptability of the equipment, without the need to replace dedicated positioning block 2-7 for each specification of trigger lever 1-3.
[0043] Preferably, the positioning end face of the positioning block 2-7 is a wedge-shaped surface.
[0044] In yet another embodiment, such as Figure 6As shown, the limiting component 2-5 includes a fixing component 2-24 and a pressing component 2-25. The linkage plate 1-2 is provided with a positioning elongated hole 1-4. During positioning, the fixing component 2-24 cooperates with the positioning elongated hole 1-4 to limit the horizontal direction of the linkage plate 1-2. The pressing part of the pressing component 2-25 abuts against the upper end face of the linkage plate 1-2 to limit the vertical direction of the linkage plate 1-2. Specifically, the fixing component 2-24 is fixedly installed on the upper end face of the base plate 2-2, and the upper end face of the base plate 2-2 is provided with an insertion hole. The connecting end of the pressing component 2-25 is inserted into the insertion hole. Through the synergistic action of the fixing component 2-24 and the clamping component 2-25, the linkage plate 1-2 is limited in both horizontal and vertical directions, forming a stable limiting structure. This structure effectively resists various forces generated during welding, ensuring the stability of the linkage plate 1-2 throughout the welding process. It will not loosen or shift due to external forces, thus improving the reliability of welding quality. During positioning, the engagement between the positioning elongated hole 1-4 on the linkage plate 1-2 and the fixing component 2-24 is simple and easy to implement. Operators can quickly install the linkage plate 1-2 into place without complex positioning tools or cumbersome operating steps, saving assembly time and improving production efficiency. The pressing part of the clamping component 2-25 abuts against the upper end face of the linkage plate 1-2. The vertical limitation of the linkage plate 1-2 can be completed through a simple clamping operation. The operation is convenient and quick, and the clamping force is easy to control and adjust, adapting to linkage plates 1-2 of different thicknesses and materials to meet diverse production needs.
[0045] In another embodiment, unlike the above embodiments, the clamp assembly 2 is provided with a clamping component 3 for clamping the opposing shaft 1-1, such as... Figure 7As shown, the clamping assembly 3 includes a clamping bracket 3-1 mounted on the top plate 2-1. Specifically, a clamping space is formed between the clamping bracket 3-1 and the top plate 2-1, and the upper end of the square shaft 1-1 extends into the clamping space through a through hole 2-4. An internally threaded sleeve 3-2 is provided inside the clamping bracket 3-1, and a clamping screw 3-3 is provided inside the internally threaded sleeve 3-2 to apply pressure to the upper end of the square shaft 1-1. Rotating the clamping screw 3-3 causes it to rotate within the internally threaded sleeve 3-2 and apply downward pressure to the upper end of the square shaft 1-1. This pressure effectively prevents the square shaft 1-1 from shaking or shifting due to external forces or other factors during welding, ensuring the axial stability of the square shaft 1-1 throughout the welding process, further improving welding accuracy, and playing a crucial role in ensuring the perpendicularity of the square shaft 1-1 to the end face of the linkage plate 1-2 and the overall quality of the triggered workpiece 1. By rotating the clamping screw 3-3, the clamping stroke and clamping force can be flexibly adjusted. Operators can easily adjust the pressure of the clamping screw 3-3 on the square shaft 1-1 according to the workpiece size and welding process requirements, adapting to different welding scenarios and workpiece characteristics to ensure the stability and reliability of the welding process, while avoiding damage to the square shaft 1-1 due to excessive pressure. A good clamping effect helps reduce weld defects caused by displacement of the square shaft 1-1 during welding. A stable welding environment allows for a more uniform and robust weld formation, thereby improving the welding quality of the trigger workpiece 1 and enhancing its reliability and service life during the switching process of the electrical switch contacts.
[0046] Preferably, a rotating handle 3-4 is provided on the clamping screw 3-3 on the side away from the square shaft 1-1, and a square hole is provided inside the clamping screw 3-3 on the side facing the square shaft 1-1. The rotating handle 3-4, located on the side of the clamping screw 3-3 away from the square shaft 1-1, provides the operator with a comfortable and easy-to-apply operating position. The operator can easily grasp the rotating handle 3-4 and rotate it to easily tighten or loosen the square shaft 1-1 without the need for other tools, greatly improving the convenience of operation and work efficiency; the square hole allows the upper end of the square shaft 1-1 to be inserted into the square hole, effectively preventing the square shaft 1-1 from shifting when under pressure, ensuring the axial position of the square shaft 1-1 during the tightening process.
[0047] In another embodiment, unlike the embodiments described above, a turntable assembly 4 is provided below the clamp assembly 2, such as... Figure 8 and Figure 9As shown, the turntable assembly 4 includes a chassis 4-1 and a base 4-2 mounted on the chassis 4-1. A rolling assembly 4-5 is fitted onto the base 4-2. Specifically, the rolling assembly 4-5 is a push needle roller and a cage assembly. A connecting seat 4-3 is provided on the rolling assembly 4-5, which is fitted onto the base 4-2 and connected to the lower end face of the base plate 2-2. During rotation, the connecting seat 4-3 rotates around the base plate 2-2 under the action of the rolling assembly 4-5. Since the connecting seat 4-3 is connected to the lower end face of the base plate 2-2, the clamp assembly 2 can achieve 360° rotation.
[0048] With the turntable assembly 4 in place, the operator can easily rotate the entire fixture assembly 2 during welding operations, thus easily performing welding operations on different welding parts of the square shaft 1-1, linkage plate 1-2, and trigger lever 1-3. This allows the operator to complete multi-angle welding operations on the trigger workpiece 1 in a single clamping, reducing the time loss caused by frequent adjustments to the tooling and welding angles, thereby significantly improving production efficiency. The use of the rolling component 4-5 makes the fixture assembly 2 more stable during rotation, effectively reducing welding defects caused by tooling wobbling or displacement, thereby improving the welding quality and consistency of the trigger workpiece 1.
[0049] Preferably, an adjusting screw 4-4 is radially inserted inside the connecting seat 4-3, and the limiting end of the adjusting screw 4-4 abuts against the base 4-2. This precisely limits the position of the turntable assembly 4 during the welding process, ensuring its stability. During welding, rotating the limiting screw firmly abuts against the base 4-2, preventing unnecessary displacement or shaking of the turntable assembly 4 due to external force or operational errors. This stable fixing method provides a solid and reliable platform for welding operations, resulting in more uniform and dense weld formation and effectively avoiding welding defects caused by unstable tooling.
[0050] By adopting the above technical solution, the square shaft 1-1 and the linkage plate 1-2 can be accurately positioned and firmly fixed, ensuring that the axis of the square shaft 1-1 is perpendicular to the positioning reference surface of the linkage plate 1-2. This effectively improves the perpendicularity accuracy when welding the square shaft 1-1 and the linkage plate 1-2, solving the problem of difficulty in accurately controlling perpendicularity in traditional welding methods. By fixing the lower end of the square shaft 1-1 in the fixing hole 2-3 of the base plate 2-2, passing the upper end through the through hole 2-4 of the top plate 2-1, and positioning and fixing the linkage plate 1-2 on the positioning reference surface of the base plate 2-2, the three points form a surface and constrain each other, forcibly ensuring that the axis of the square shaft 1-1 is strictly perpendicular to the positioning reference surface (i.e., its mounting end face) of the linkage plate 1-2.
[0051] The insertion slot 2-6 and positioning block 2-7 provided on the base plate 2-2 can accurately fix the position of the triggering plate 1-3, ensure the welding accuracy and positional relationship between the triggering plate 1-3 and the linkage plate 1-2, and enable the triggering plate 1-3 to accurately perform its function of driving the contact to close or open after welding.
[0052] Because the tooling can accurately position and fix the square shaft 1-1 and the linkage plate 1-2, operators do not need to frequently use vernier calipers for manual measurement and repeated adjustments, greatly saving measurement and adjustment time and improving welding efficiency. It can reliably guarantee the dimensional consistency and geometric accuracy of the trigger workpiece 1, ensuring that each trigger workpiece 1 maintains high quality and consistency during mass production, which is conducive to automated production and assembly line operations, further improving overall production efficiency.
[0053] The fixing and positioning of the tooling makes the welding process more stable and can effectively avoid welding defects caused by workpiece shaking or displacement, such as incomplete welding, missing welding, and uneven weld, thereby improving the welding quality and consistency of the trigger workpiece 1.
[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A welding fixture for a triggering workpiece used for reversing electrical switch contacts, the triggering workpiece comprising a square shaft, a linkage plate, and a trigger lever, characterized in that, The welding fixture includes a clamping assembly for fixing the triggering workpiece; The fixture assembly includes a base plate and a top plate arranged in parallel intervals. The base plate is provided with a fixing hole for fixing the lower end of the square shaft. The top plate, relative to the fixing hole, is provided with a through hole for the upper end of the square shaft to pass through. The upper surface of the base plate is the positioning reference surface of the linkage plate. A limiting component for fixing the linkage plate is provided on the positioning reference surface. The axis of the square shaft is perpendicular to the positioning reference surface of the linkage plate. The base plate located at the linkage plate positioning position is provided with a plug slot for inserting the trigger lever, and a positioning block for fixing the trigger lever is provided in the plug slot.
2. The welding fixture for triggering workpieces for switching electrical switch contacts according to claim 1, characterized in that, The clamp assembly is provided with a clamping component for clamping the opposite shaft. The clamping component includes a clamping bracket mounted on the top plate. An internally threaded sleeve is provided inside the clamping bracket. A clamping screw for applying pressure to the upper end of the opposite shaft is provided inside the internally threaded sleeve.
3. The welding fixture for triggering workpieces for switching electrical switch contacts according to claim 1 or 2, characterized in that, Below the clamp assembly is a turntable assembly, which includes a chassis and a base mounted on the chassis. A rolling assembly is fitted on the base, and a connecting seat is fitted on the rolling assembly outside the base. The connecting seat is connected to the lower end face of the base plate.
4. The welding fixture for triggering workpieces for switching electrical switch contacts according to claim 3, characterized in that, An adjusting screw is radially inserted inside the connecting seat, and the limiting end of the adjusting screw can abut against the base.
5. The welding fixture for triggering workpieces for switching electrical switch contacts according to claim 1, characterized in that, The through hole is an elongated hole structure. A right-angled groove is provided at the through hole away from the side of the top plate. A first installation channel is provided in the top plate located at the through hole along the length of the through hole. A first positioning clamp is provided in the first installation channel. The first positioning clamp can reciprocate linearly along the first installation channel. A first V-shaped groove is provided on the first positioning clamp facing the side of the right-angled groove. The first V-shaped groove and the right-angled groove form a clamping space for clamping the upper end of the square shaft.
6. The welding fixture for triggering workpieces for switching electrical switch contacts according to claim 1, characterized in that, A second mounting channel is provided in the bottom plate at the lower end of the fixing hole. A second positioning clamp is provided in the second mounting channel. The second positioning clamp can reciprocate linearly along the second mounting channel. A second V-groove is provided on the second positioning clamp facing the fixing hole. The second V-groove and the fixing hole form a clamping space for clamping the lower end of the square shaft.
7. The welding fixture for triggering workpieces for switching electrical switch contacts according to claim 1, characterized in that, The positioning block can move along the insertion slot. A third installation channel is provided in the bottom plate at the lower end of the insertion slot. A pushing block is provided in the third installation channel. The pushing block can move back and forth in a straight line along the third installation channel. The positioning block is fixedly set on the upper end face of the pushing block.
8. The welding fixture for triggering workpieces for switching electrical switch contacts according to claim 1, characterized in that, A support shaft is provided between the top plate and the bottom plate.
9. The welding fixture for triggering workpieces for switching electrical switch contacts according to claim 1, characterized in that, Tie rods are installed at the four corners of the top plate and the bottom plate, with both ends of the tie rods passing through the top plate and the bottom plate respectively, and fixed by nuts.
10. The welding fixture for triggering workpieces for switching electrical switch contacts according to claim 1, characterized in that, The limiting component includes a fixing component and a pressing component. The linkage plate is provided with a positioning elongated hole. During the positioning process, the fixing component cooperates with the positioning elongated hole to limit the horizontal direction of the linkage plate. The pressing part of the pressing component abuts against the upper end of the linkage plate to limit the vertical direction of the linkage plate.