Assembly equipment for thermal components of a circuit breaker mechanism

Abstract

This invention discloses an assembly device for a circuit breaker core thermal assembly, comprising a fixed plate and an indexing plate rotatable relative to the fixed plate. The indexing plate is equipped with multiple positioning fixtures. Surrounding the indexing plate are a contact loading device for sequentially transporting contacts to the positioning fixtures, a core loading device for sequentially transporting semi-finished core thermal assemblies to the positioning fixtures, a lead loading device for transporting leads to the positioning fixtures, a welding device for welding leads to moving contacts, a lead-contact translation robot for transporting moving contacts with leads to the semi-finished core thermal assembly on the positioning fixtures, a two-stage welding device for welding moving contacts with leads to contact supports on the semi-finished core thermal assembly, and a discharge device. This invention can replace manual labor in assembling the leads, moving contacts, and contact supports in the core thermal assembly, resulting in high efficiency and significantly improved product yield.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker manufacturing technology, and in particular to an assembly device for a circuit breaker core thermal assembly. Background Technology

[0002] The thermal assembly of a circuit breaker mechanism is a core component for overload protection, primarily utilizing the thermal effect of a bimetallic strip to protect the circuit. This assembly typically consists of contact supports, levers, pins, limiting components, torsion springs, mechanism springs, moving contacts, and leads. When an overload current occurs in the circuit, the thermal element heats up, causing the bimetallic strip to bend and push the mechanical structure to separate the contacts, thus cutting off the circuit and preventing damage from prolonged overload. During circuit breaker production, the various components must be assembled. The most challenging step is welding the contacts and leads to the semi-finished mechanism. Traditionally, the leads were manually welded to the contacts first, and then the leads were welded to the contact supports on the semi-finished mechanism. However, this manual assembly method is extremely inefficient and has a high defect rate, making it unsuitable for long-term business development. Summary of the Invention

[0003] The purpose of this invention is to provide an assembly device for the thermal components of a circuit breaker mechanism. This invention can replace manual labor in assembling the leads, moving contacts, and contact supports in the thermal components of the mechanism, which is not only highly efficient but also greatly improves the product qualification rate.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an assembly device for a circuit breaker core thermal assembly, comprising a fixed plate and an indexing plate rotatable relative to the fixed plate. Multiple positioning fixtures for workpiece positioning are arranged in a circumferential array on the indexing plate. Around the periphery of the indexing plate, along the transport direction of the positioning fixtures, are sequentially arranged a contact loading device for sequentially transporting contacts to the positioning fixtures, a core loading device for sequentially transporting semi-finished core thermal assemblies to the positioning fixtures, a lead loading device for transporting leads to the positioning fixtures, a welding device for welding leads to moving contacts, a lead contact translation robot for transporting moving contacts with leads to the semi-finished core thermal assembly on the positioning fixtures, a welding device for welding moving contacts with leads to the contact support of the semi-finished core thermal assembly, and a discharge device for discharging the assembled core thermal assembly. By adopting the above technical solution, the automatic feeding of moving contacts, semi-finished products of the mechanism thermal assembly, and leads can be realized. At the same time, the leads are automatically welded to the moving contacts, and the moving contacts with leads are welded to the semi-finished products of the mechanism thermal assembly. Finally, the finished products are discharged. This realizes the automated assembly of the leads, moving contacts, and contact supports in the mechanism thermal assembly, which is not only highly efficient, but also greatly improves the product qualification rate.

[0005] The present invention is further configured such that the positioning fixture includes a workstation base block, a contact positioning groove disposed on the workstation base block for positioning the moving contact, and a product positioning groove for positioning the thermal components of the mechanism. A vertical groove is provided through the workstation base block along its vertical length. One end of the vertical groove is connected to the contact positioning groove. An L-shaped clamping arm is oscillatingly connected to the vertical groove via a rotating shaft. The upper end of the L-shaped clamping arm extends into the vertical groove. A first clamping spring is provided between the lower end of the L-shaped clamping arm and the workstation base block. The first clamping spring causes the L-shaped clamping arm to swing and clamp the moving contact in the contact positioning groove. Furthermore, a lead wire release cylinder is provided at a position below the lead wire contact translation robot corresponding to the indexing plate. The movable end of the lead wire release cylinder moves upward and pushes the L-shaped clamping arm to swing and release the lead wire. The workstation base block is further equipped with a lead wire fixing assembly at the side of the contact positioning groove and the product positioning groove, respectively, for clamping the lead wire. The lead wire fixing assembly includes a stationary fixing block mounted on the workstation base block, a movable fixing block that can move towards or away from the stationary fixing block, and a second clamping spring that applies a force to the movable fixing block in the direction of the stationary fixing block. Under the action of the second clamping spring, the movable fixing block moves towards the stationary fixing block and clamps the corresponding lead wire. The fixed plate is also equipped with multiple sets of release clamping assemblies for releasing the movable fixing blocks on the corresponding positioning fixtures to store or remove the lead wire. Each release clamping assembly includes a release cylinder mounted on the fixed plate and a release lever on the movable end of the release cylinder for moving the movable fixing block away from the stationary fixing block. By adopting the above technical solution, the lead wire, moving contact, and core thermal assembly can be positioned. Simultaneously, the lead wire and moving contact can be clamped and released, ensuring stable positioning during welding and greatly improving the welding quality of the product.

[0006] The present invention is further configured such that the lead wire feeding device includes a lead wire transport track, a lead wire feeding mechanism arranged sequentially along the extension direction of the lead wire transport track, a wire bonding mechanism for bonding wire knots at equal intervals on the lead wire, and a cutting mechanism for cutting the wire bonding portion of the lead wire. The lead wire transport track is provided with a lead wire groove for positioning the lead wire. A length-fixing mechanism is also provided in front of the lead wire transport track for pulling the lead wire out of the lead wire transport track by a set length for the cutting mechanism to perform fixed-length cutting. A lead wire translation robot is provided on the side of the length-fixing mechanism for transporting the cut lead wire to the positioning fixture. The length-fixing mechanism includes a length-fixing base, a length-fixing slide cylinder provided on the length-fixing base, and a finger cylinder provided on the movable end of the length-fixing slide cylinder for clamping the end of the lead wire. The length-fixing slide cylinder drives the finger cylinder to move toward or away from the lead wire transport track. By adopting the above technical solution, during the lead wire transmission process, the wire bonding mechanism welds multiple wire knots at equal intervals on the lead wire, the fixed length mechanism pulls out the lead wire of a set length, and the cutting mechanism cuts the first section of the lead wire according to the position of the wire knot. After removing the section of the lead wire, the above steps are repeated. This replaces manual cutting of the lead wire to a fixed length and welding connection at the end, which is not only highly efficient, but also greatly improves the product qualification rate.

[0007] The invention is further configured such that the fixed-length base includes a base plate, two upright plates disposed on the base plate, and an adjusting plate slidably disposed on the two upright plates in a direction toward or away from the lead wire transmission track. The bottom of the adjusting plate has two grooves for the top ends of the upright plates to extend into. A positioning seat is provided between the two upright plates, and an adjusting screw is rotatably mounted on the positioning seat. Snap rings are respectively engaged with the adjusting screw on both sides of the positioning seat. The bottom of the adjusting plate has a transmission nut that forms a threaded engagement with the adjusting screw. By adopting the above technical solution, rotating the adjusting screw can move the adjusting plate, achieving fine-tuning of the length of a single lead wire segment after cutting, making it suitable for products of different specifications.

[0008] The invention is further configured such that the fixed-length base includes two limiting protrusions, each including a positioning portion with a rectangular bottom cross-section and a limiting portion with a dovetail-shaped positioning cross-section. The upper end of the upright plate is provided with a positioning groove, and the positioning portion is fixed within the positioning groove by fasteners. The adjusting plate is provided with a limiting groove corresponding to the upper end of the sliding groove, which cooperates with the limiting portion. By adopting the above technical solution, the adjusting plate can be vertically limited, allowing it to move only along the extension direction of the limiting protrusions, greatly improving the stability of the adjusting plate's position adjustment.

[0009] The present invention is further configured such that the cutting mechanism includes a cutting bracket, a blade holder located at the end of the lead wire transmission track corresponding to the cutting bracket, a lower blade mounted on the blade holder, an upper blade movably mounted above the lower blade, a cutting cylinder mounted on the cutting bracket, and a movable plate connected to the movable end of the cutting cylinder. The upper blade is mounted on the movable plate, and a guide rail is also vertically mounted on the cutting bracket. A slider cooperating with the guide rail is provided on the movable plate. By adopting the above technical solution, the upper blade is moved closer to the lower blade by the cutting cylinder, thereby achieving the cutting of the lead wire. The structure is simple, and the cutting action is highly efficient.

[0010] The invention is further configured such that the blade holder has a movable groove, and a floating block is provided within the movable groove. The lower blade is installed at a position in front of the movable groove of the blade holder to limit the floating block. A T-shaped guide block is provided at the inner end of the movable groove of the blade holder. The lower end of the T-shaped guide block has a T-shaped guide groove that cooperates with the T-shaped guide block. When the floating block moves vertically, the T-shaped guide groove can be vertically displaced relative to the T-shaped guide block. A floating spring is provided between the floating block and the blade holder to apply an upward force to the floating block. The floating block has a floating groove and a cutting pressure block for confining the lead wire within the floating groove. By adopting the above technical solution, during the downward movement of the upper blade to cut the lead wire, it abuts against the floating block and pushes the floating block downward. The floating block not only makes way for the upper blade, allowing it to continue downward and cooperate with the lower blade to cut the lead wire, but also supports and positions the lead wire, thereby ensuring a good cutting effect.

[0011] The invention is further configured such that the wire bonding mechanism includes a welding base disposed below the lead wire transmission track, a lower electrode plate disposed on the welding base, a lower welding head disposed on the lower electrode plate, a movable seat disposed above the lead wire transmission track, an upper electrode plate disposed at the bottom of the movable seat, and an upper welding head disposed on the upper electrode plate. The welding base also has two columns, and the movable seat has two linear bearings respectively sleeved on the outer periphery of the corresponding columns. The upper ends of the two columns are also provided with cylinder plates, and welding cylinders are mounted on the cylinder plates. The movable end of the welding cylinder is connected to the movable seat to drive the movable seat to move vertically. The middle of the lead wire transmission track has a welding joint for the lower end of the upper welding head and the upper end of the lower welding head to extend into. By adopting the above technical solution, the welding cylinder drives the upper welding head to move towards the lower welding head to perform the wire bonding process, making the welding action highly efficient.

[0012] The invention is further configured such that the wire bonding mechanism includes a first welding head seat and a second welding head seat respectively disposed on the left and right sides of the lower electrode plate; the upper end of the first welding head seat is provided with a first guide groove along the vertical direction and a second guide groove extending toward the welding fracture direction and communicating with the first guide groove; a welding head top plate is slidably disposed on the first guide groove along the vertical direction; a push screw for pushing the welding head top plate downward when moving downward is connected to the lower end of the movable seat; a first return spring for applying an upward force to the welding head top plate is disposed at the inner end of the first guide groove; a first welding head slide is slidably disposed in the second guide groove; a first small welding head is horizontally mounted on the upper side of the first welding head slide; a push inclined surface for pushing the first welding head slide toward the direction closer to the welding fracture direction when moving downward is provided on the side of the welding head top plate; and a push inclined surface for moving upward with the first welding head slide when moving upward is provided at the bottom of the welding head top plate. The lower ends of the welding head slide abut against each other to form a limiting flange for upper stroke limitation. A second return spring is also installed on the first welding head seat to apply a force to the first welding head slide in the direction away from the weld fracture. A third guide groove is vertically opened on the upper edge of the second welding head seat, and the second welding head slide is slidably arranged on the upper edge of the third guide groove. A second small welding head is horizontally installed on the upper edge of the second welding head slide. The second small welding head abuts against the right side of the lower welding head. A limiting plate is provided at the upper end of the second welding head seat to form an upper stroke limitation for the second welding head slide. A third return spring is installed on the second welding head seat at a position corresponding to the lower part of the second welding head slide to apply an upward force to the second welding head slide. When the upper welding head moves downward and abuts against the upper end of the second small welding head, the right end of the first small welding head abuts against the left side of the upper welding head, and the lower side of the first small welding head abuts against the upper end of the lower welding head. By adopting the above technical solution, when the wire bonding action is performed, the upper and lower welding heads work together to apply a vertical compressive force to the lead wire, and the first and second small welding heads work together to apply a horizontal compressive force to the lead wire. As a result, four positive pressures are formed on the lead wire from top to bottom and left to right to compress it. This part is heated and welded into a wire knot with a rectangular cross-section. The weld is not only very strong, but the surface of the wire knot is also smooth and flat, which is conducive to subsequent assembly.

[0013] The invention is further configured such that a set of stop components is respectively provided on the lead wire transport track at positions corresponding to the rear sides of the wire bonding mechanism and the cutting mechanism. Each stop component includes a stop seat, a stop cylinder mounted on the stop seat, and a wire clamping block mounted on the movable end of the stop cylinder. The stop cylinder drives the wire clamping block to extend downwards into or upwards out of the lead wire groove. By adopting the above technical solution and setting the stop components, the transport of the lead wire can be paused before the welding and cutting processes, thereby ensuring the stable execution of the welding and cutting actions.

[0014] The invention is further configured such that the lead wire transmission track is provided with multiple sets of pre-compression components. Each pre-compression component includes a pre-compression mounting block, a pre-compression block, and a pre-compression tension spring. The pre-compression mounting block is disposed on the lead wire transmission track, with its upper end rotatably mounted on it. One end of the pre-compression tension spring is fixed to the pre-compression mounting block, and its other end overlaps with the lower end of the pre-compression block, causing the pre-compression block to press the lead wire tightly within the lead wire groove. The lower end of the pre-compression block is inclined towards the lead wire transmission direction. By adopting the above technical solution, the pre-compression block of the pre-compression component can stably confine the lead wire within the groove of the lead wire transmission track under the action of the tension spring, improving its transportation stability. Simultaneously, the pre-compression block can also prevent the lead wire from regressing, thereby avoiding changes in the welding position and cutting length, and facilitating the achievement of identical lengths for all cut lead wires.

[0015] The invention is further configured such that the wire feeding mechanism includes a wire feeding motor, a wire feeding wheel rotatably mounted on the wire feeding motor, a guide wheel plate mounted on the side of the wire feeding wheel, a straightening plate slidably mounted on the guide wheel plate vertically, a straightening wheel mounted on the straightening plate, multiple circular pulleys mounted on the upper end of the guide wheel plate, and a guide wheel mounted at the beginning of the wire transmission track. The lead wire pulled out by the wire feeding wheel is sequentially wound around the straightening wheel, the circular pulleys, and the guide wheel. By adopting the above technical solution, after the lead wire is drawn out, it is straightened and guided by the straightening wheel, the circular pulleys, and the guide wheel, and finally the straightened lead wire is introduced into the lead wire groove of the lead wire transmission track, ensuring its welding and fixed-length cutting effect, and improving product quality.

[0016] The invention is further configured such that the welding device includes a welding frame, an upper electrode plate and a lower electrode plate disposed on the welding frame, which can be vertically positioned relative to each other, and an upper welding head and a lower welding head respectively disposed on the upper electrode plate and the lower electrode plate. The fixed plate is also equipped with a clamping cylinder, and the movable end of the clamping cylinder is equipped with a contact clamping block for vertically pressing the moving contact into the contact positioning groove during downward movement. By adopting the above technical solution, the lead wire and the moving contact can be firmly, quickly, and securely welded together.

[0017] The present invention is further configured such that the two-stage welding device is used to weld the moving contact to the support groove of the contact support, including a welding frame, a first welding head assembly and a second welding head assembly disposed on the welding frame above the corresponding contact support, and a support assembly disposed below the contact support. The first welding head assembly includes a first welding cylinder disposed on the welding frame, a first welding seat connected to the movable end of the first welding cylinder, a first electrode plate disposed on the first welding seat, and a first welding head mounted on the first electrode plate for abutting against the upper end of the moving contact when moving downward. The second welding head assembly includes a second welding cylinder disposed on the welding frame, a second welding seat connected to the movable end of the second welding cylinder, a second electrode plate disposed on the second welding seat, and a second welding head mounted on the second electrode plate for abutting against the upper end of the contact support when moving downward. By adopting the above technical solution, when the positioning fixture of the core thermal assembly reaches the welding position, the first welding head and the second welding head move downward under the drive of the corresponding welding cylinder and abut against the upper end of the moving contact and the contact support, respectively. At the same time, the support assembly supports the contact support, the first welding head and the second welding head are energized and conduction is achieved, and the contact surface between the moving contact and the contact support is welded together under the action of a large current. This realizes the welding of the moving contact with the lead wire to the contact support of the core thermal assembly semi-finished product, which greatly improves the assembly efficiency of the product.

[0018] The present invention is further configured such that the support assembly includes a support base plate, a support upright plate disposed on the support base plate, a support head movable plate vertically slidable on the support upright plate, a welding support head mounted on the support head movable plate, a push-pull cylinder mounted on the support base plate, a support top block disposed on the movable end of the push-pull cylinder for pushing the support head movable plate upward, and a reset spring connected at both ends to the support base plate and the support head movable plate respectively for pulling the support head movable plate downward to reset. By adopting the above technical solution, when the push-pull cylinder pushes the support top block out, it can push the support head movable plate upward, thereby driving the welding support head upward until it abuts against the lower end of the mechanism's thermal assembly, supporting it and preventing the downward pressure of the two welding heads from directly acting on the positioning fixture, which would cause uneven force on the transmission device and affect transmission stability. When the push-pull cylinder pulls the support top block back, the support head movable plate resets downward under the action of the reset spring, without the need for additional electric drive components.

[0019] The invention is further configured such that when the welding support head moves to its upper limit position, the upper end of the welding support head abuts against the lower end of the moving contact, and the side of the welding support head is also provided with a side support protrusion for abutting against the lower end of the contact support. By adopting the above technical solution, the welding support head simultaneously supports the bottom of both the moving contact and the contact support, which can greatly improve the support effect on the thermal components of the mechanism, and also significantly improve the welding effect of both the moving contact and the contact support.

[0020] The invention is further configured such that a U-shaped pressure block for fixing the welding support head to the movable support head plate is connected to the side of the movable support head plate by fasteners. By adopting the above technical solution, the welding support head can be positioned and installed, the installation structure is simple and reliable, and disassembly and assembly are very convenient.

[0021] The invention is further configured such that a follower roller is rotatably connected to the bottom of the movable support head plate via a rotating shaft, and a driving inclined surface corresponding to the position below the follower roller on the support top block, which cooperates with the follower roller. By adopting the above technical solution, the cooperation between the driving inclined surface and the follower roller not only results in low friction, but also allows the movable support head plate to move upward through a vertical component force. The cooperation structure between the movable support head plate and the support top block is simple, reliable, and operates quickly.

[0022] The invention is further configured such that the supporting base plate has an inverted T-shaped groove extending perpendicular to the direction of movement of the welding support head, and the bottom of the supporting top block has an inverted T-shaped sliding part that slides with the inverted T-shaped groove. By adopting the above technical solution, the directional sliding of the supporting top block can be realized, thereby improving the stability of the supporting top block's movement.

[0023] The invention is further configured such that the upper end of the movable plate of the support head is threadedly connected to a limiting screw, which abuts against the bottom of the positioning fixture of the movement's thermal assembly during upward movement to form a limit. The limiting screw is also threadedly connected to an anti-loosening nut, which abuts against the upper end of the movable plate of the support head when tightened. By adopting the above technical solution, the upper limit position of the movable plate of the support head can be set, enabling the welding support head to accurately and effectively support the moving contact and contact support. Simultaneously, the height of the limiting screw is adjustable, allowing for fine-tuning of the upper limit position of the movable plate of the support head according to actual conditions, thus improving flexibility.

[0024] The invention is further configured to include a secondary clamping assembly, which includes a secondary clamping cylinder mounted on the side of the welding frame and a positioning plate disposed on the movable end of the secondary clamping cylinder for pressing the moving contact horizontally into a support groove for contact support when extended. The positioning plate has a contact positioning recess for embedding the end of the moving contact away from the contact support. By adopting the above technical solution, during the welding process, the positioning plate is extended by the secondary clamping cylinder, applying a horizontal constraint force to the moving contact, preventing horizontal displacement during welding, thereby improving welding quality.

[0025] The present invention is further configured such that: the contact feeding device includes a first vibratory plate, a first linear vibrating track connected to the discharge end of the first vibratory plate, a first linear vibrator disposed at the bottom of the first linear vibrating track, and a first translational manipulator disposed on the side of the first linear vibrating track for picking up the moving contacts one by one onto the corresponding positioning fixture; the mechanism feeding device includes a second vibratory plate, a second linear vibrating track connected to the discharge end of the second vibratory plate, a second linear vibrator disposed at the bottom of the second linear vibrating track, and a second translational manipulator disposed on the side of the second linear vibrating track for picking up the semi-finished thermal components of the mechanism one by one onto the corresponding positioning fixture; the discharge device includes a visual inspection camera, a discharge handling component, a discharge guide chute, a qualified product collection bin, and a defective product collection box; the visual inspection camera is mounted on a fixed plate. This system is used to inspect assembled thermal components of the movement. A guide trough seat is provided between the qualified product collection bin and the defective product collection box. A switching cylinder is installed at an angle on the guide trough seat. The discharge guide trough is installed on the movable end of the switching cylinder, and its lower end is positioned above the qualified product collection bin. When the switching cylinder moves the discharge guide trough, it has a first position where its upper end is above the defective product collection box and a second position where it is away from the defective product collection box. The discharge handling assembly includes a discharge rack, a horizontal discharge cylinder mounted on the discharge rack, a vertical discharge cylinder mounted on the movable end of the horizontal discharge cylinder, and a first discharge finger cylinder and a second discharge finger cylinder mounted on the movable end of the vertical discharge cylinder for clamping the thermal components of the movement, respectively. By adopting the above technical solution, automatic feeding of contacts and semi-finished thermal components of the movement can be achieved, as well as inspection of assembled finished thermal components of the movement, enabling the sorting of qualified and defective products, improving efficiency while ensuring product quality. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the positioning tooling of the present invention; Figure 3 This is a first sectional view of the positioning tooling of the present invention; Figure 4 This is a second sectional view of the positioning tooling of the present invention; Figure 5 This is a schematic diagram of the installation structure of the lead contact translation robot of the present invention; Figure 6 This is a schematic diagram of the lead wire feeding device of the present invention; Figure 7 This is a first-view structural schematic diagram of the fixed-length mechanism in the lead wire feeding device of the present invention; Figure 8 This is a second-view structural schematic diagram of the fixed-length mechanism in the lead wire feeding device of the present invention; Figure 9 This is a schematic diagram of the cutting mechanism in the lead wire feeding device of the present invention; Figure 10 This is a partially enlarged structural diagram of the cutting mechanism in the lead wire feeding device of the present invention after the lower blade has been removed; Figure 11 This is a schematic diagram of the wire bonding mechanism in the lead wire feeding device of the present invention; Figure 12 This is a schematic diagram showing the distribution structure of the four welding heads in the wire bonding mechanism of the lead wire feeding device of the present invention; Figure 13 This is a partial cross-sectional view of the wire bonding mechanism in the lead wire feeding device of the present invention. Figure 14 This is a schematic diagram of the stop assembly and pre-compression assembly in the lead wire feeding device of the present invention; Figure 15 This is a schematic diagram of the wire feeding mechanism in the wire feeding device of the present invention; Figure 16 This is a schematic diagram of the structure of a welding device of the present invention; Figure 17 This is a schematic diagram of the structure of the two-stage welding device of the present invention; Figure 18 This is a schematic diagram of the support assembly in the two-stage welding device of the present invention; Figure 19 This is a schematic diagram of the installation structure of the secondary clamping component in the two-stage welding device of the present invention; Figure 20 This is a schematic diagram of the material discharge device of the present invention.

[0027] In the diagram: 1. Lead wire transmission track; 2. Wire feeding mechanism; 3. Wire bonding mechanism; 4. Cutting mechanism; 5. Lead wire groove; 6. Length fixing mechanism; 7. Length fixing base; 8. Length fixing slide cylinder; 9. Finger cylinder; 10. Base plate; 11. Vertical plate; 12. Adjusting plate; 13. Positioning seat; 14. Adjusting screw; 15. Transmission nut; 16. Limiting protrusion; 17. Positioning part; 18. Limiting part; 19. Positioning groove; 20. Limiting groove; 21. Cutting bracket; 22. Blade holder; 23. Lower blade; 24. Upper blade; 25. Cutting cylinder; 26. Movable plate; 27. Guide rail; 28. Slider; 29. ​​Movable groove; 30. Floating block; 31. T-shaped guide block; 32. T-shaped guide groove; 33. Floating spring; 34. Floating groove; 35. Cutting block; 36. Welding base; 37. Lower electrode plate; 38. Lower welding head; 39. Movable seat; 40. Upper electrode plate; 41. Upper welding head; 42. Column; 43. Linear bearing; 44. Cylinder plate; 45. Welding cylinder; 46. First welding head seat; 47. Second welding head seat; 48. First guide groove; 49. Second guide groove; 50. Welding head top plate; 51. Push screw; 52. First return spring; 53. First welding head slide; 54. First small welding head; 55. Pushing inclined surface; 56. Limiting flange; 57. Second return spring; 58. Third guide groove; 59. Second welding head slide; 60. Second small welding head; 61. Limiting plate; 62. Third return spring; 63. Stop assembly; 64. Stop seat; 65. Stop cylinder; 66. Wire clamping block; 67. Pre-compression assembly; 68. Pre-compression mounting block; 69. Pre-compression block; 70. Pre-compression tension spring; 71. Wire feeding motor; 72. Wire feeding reel; 73. Guide wheel plate; 74. Straightening plate; 75. Straightening wheel; 76. Circular pulley; 77. Guide wheel; 78. Slide groove; 79. Welded joint; 80. Welding frame; 81. First welding head assembly; 82. Second welding head assembly; 83. Support assembly; 84. First welding cylinder; 85. First welding seat; 86. First electrode plate; 87. First welding head; 88. Second welding cylinder; 89. Second welding seat; 90. Second electrode plate; 91. Second welding head; 92. Support base plate; 93. Support upright plate; 94. Support head movable plate; 95. 96. Welding support head; 97. Push-pull cylinder; 98. Support top block; 99. Reset tension spring; 100. Support protrusion; 101. U-shaped pressure block; 102. Follower roller; 103. Drive inclined surface; 104. Inverted T-shaped groove; 105. Inverted T-shaped sliding part; 106. Limit screw; 107. Anti-loosening nut; 108. Secondary clamping assembly; 109. Secondary clamping cylinder; 110. Positioning pressure plate; 111. Contact positioning recess; 112. Fixed plate; 113. Indexing plate; 114. Positioning fixture; 115. Contact loading device; 116. Mechanism loading device; 117. Lead wire loading device; 118. First-stage welding device; 119. Lead wire contact translation robot; 120. Second-stage welding device; 111. Discharge device;121. Station base block; 122. Contact positioning groove; 123. Product positioning groove; 124. Base block vertical groove; 125. L-shaped clamping arm; 126. First clamping spring; 127. Lead wire release cylinder; 128. Lead wire fixing assembly; 129. Stationary fixing block; 130. Movable fixing block; 131. Second clamping spring; 132. Release clamping assembly; 133. Release cylinder; 134. Release lever; 135. Lead wire translation robot; 136. First stage welding frame; 137. First stage upper electrode plate; 138. First stage lower electrode plate; 139. First stage upper welding head; 140. First stage lower welding head; 141. Pressing cylinder; 142. 143. Contact pressure block; 144. First vibratory feeder; 145. First vertical vibration track; 146. First vertical vibrator; 147. First translational manipulator; 148. Second vibratory feeder; 149. Second vertical vibration track; 150. Second vertical vibrator; 151. Second translational manipulator; 152. Vision inspection camera; 153. Material handling assembly; 154. Material discharge guide chute; 155. Qualified product collection bin; 156. Defective product collection box; 157. Guide chute seat; 158. Switching cylinder; 159. Material discharge rack; 160. Horizontal material discharge cylinder; 161. Vertical material discharge cylinder; 162. First material discharge finger cylinder; 163. Second material discharge finger cylinder. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example: As attached Figures 1-20The diagram illustrates an assembly device for a circuit breaker core thermal assembly, comprising a fixed disk 111 and an indexing disk 112 rotatable relative to the fixed disk 111. The indexing disk 112 is rotated by a motor-driven divider, which in turn drives the indexing disk 112 to rotate. The fixed disk 111 is mounted on the housing of the divider and coaxially arranged with the indexing disk 112, with the outer diameter of the indexing disk 112 being larger than that of the fixed disk 111. Multiple positioning fixtures 113 for workpiece positioning are arranged in a circumferential array on the indexing disk 112. Sequentially arranged around the periphery of the indexing disk 112 along the transport direction of the positioning fixtures 113 are used to sequentially transport contacts to the positioning fixtures. The device includes: a contact feeding device 114 on the mounting 113; a mechanism feeding device 115 for sequentially transporting semi-finished core thermal components to the positioning fixture 113; a lead wire feeding device 116 for transporting lead wires to the positioning fixture 113; a first-stage welding device 117 for welding lead wires to moving contacts; a lead wire contact translation robot 118 for transporting moving contacts with lead wires to the semi-finished core thermal components on the positioning fixture 113; a second-stage welding device 119 for welding moving contacts with lead wires to the contact support of the semi-finished core thermal components; and a discharge device 120 for discharging the assembled core thermal components. This design enables automatic feeding of moving contacts, semi-finished thermal components of the movement, and leads. Simultaneously, it automatically welds leads to moving contacts, welds moving contacts with leads to semi-finished thermal components of the movement, and finally discharges finished products. This achieves automated assembly of leads, moving contacts, and contact supports in the thermal components of the movement, which is not only highly efficient but also greatly improves the product qualification rate.

[0030] As attached Figures 2-4As shown, the positioning fixture 113 includes a workstation base block 121, a contact positioning groove 122 for positioning the moving contact, and a product positioning groove 123 for positioning the thermal assembly of the mechanism. A vertical groove 124 extends vertically through the workstation base block 121, and one end of the vertical groove 124 is connected to the contact positioning groove 122. An L-shaped clamping arm 125 is oscillatingly connected within the vertical groove 124 via a rotating shaft, with the upper end of the L-shaped clamping arm 125 extending into the vertical groove 124. Inside the 4th section, a first clamping spring 126 is provided between the lower end of the L-shaped clamping arm 125 and the workstation base block 121. The first clamping spring 126 causes the L-shaped clamping arm 125 to swing and clamp the moving contact in the contact positioning groove 122. Furthermore, a lead wire release cylinder 127 is provided on the indexing plate 112 below the lead wire contact translation robot 118. The movable end of the lead wire release cylinder 127 moves upward and pushes the L-shaped clamping arm 125, causing the L-shaped clamping arm 125 to swing and release the lead wire. The workstation base block 121... Block 121 is further provided with a lead wire fixing assembly 128 for clamping the lead wire at the positions corresponding to the contact positioning groove 122 and the product positioning groove 123. The lead wire fixing assembly 128 includes a stationary fixing block 129 mounted on the workstation base block 121, a movable fixing block 130 that can move towards or away from the stationary fixing block 129, and a second clamping spring 131 that applies a force to the movable fixing block 130 toward the stationary fixing block 129. The movable fixing block 130 is clamped by the second clamping spring. Under the action of 131, the lead wire moves towards the stationary fixing block 129 and clamps the corresponding lead wire. The fixing plate 111 is also provided with multiple sets of release clamping components 132 for opening the movable fixing blocks 130 on the corresponding positioning fixture 113 to store or remove the lead wire. The release clamping components 132 include a release cylinder 133 installed on the fixing plate 111 and a release lever 134 set on the movable end of the release cylinder 133 for moving the movable fixing block 130 away from the stationary fixing block 129. This design can position the lead wire, moving contact, and core thermal components. At the same time, it can clamp and release the lead wire and moving contact, so that they can maintain stable positioning during welding, which greatly improves the welding quality of the product.

[0031] As attached Figures 6-15As shown, the lead wire feeding device 116 includes a lead wire transmission track 1, a lead wire feeding mechanism 2 arranged sequentially along the extension direction of the lead wire transmission track 1, a wire bonding mechanism 3 for bonding wire knots at equal intervals on the lead wire, and a cutting mechanism 4 for cutting the wire bonding portion of the lead wire. The lead wire transmission track 1 is provided with a lead wire groove 5 for lead wire positioning. A length-fixing mechanism 6 is also provided in front of the lead wire transmission track 1 for pulling the lead wire out of the lead wire transmission track 1 by a set length for the cutting mechanism 4 to perform fixed-length cutting. A lead wire translation robot 135 is provided on the side of the length-fixing mechanism 6 for transporting the cut lead wire to the positioning fixture. The length-fixing mechanism 6 includes a length-fixing base 7, a length-fixing slide cylinder 8 provided on the length-fixing base 7, and a finger cylinder 9 provided on the movable end of the length-fixing slide cylinder 8 for clamping the end of the lead wire. The length-fixing slide cylinder 8 drives the finger cylinder 9 to move towards or away from the lead wire transmission track 1. During lead wire transmission, the wire bonding mechanism 3 welds multiple wire knots at equal intervals on the lead wire. The lead wire of a set length is pulled out by the length-fixing mechanism 6, and then the cutting mechanism 4 cuts the first section of the lead wire according to the position of the wire knot. After removing the section of the lead wire, the above steps are repeated. This replaces manual cutting of the lead wire to a fixed length and end welding connection, which is not only more efficient, but also greatly improves the product qualification rate.

[0032] As attached Figure 7 and attached Figure 8 As shown, the fixed-length base 7 includes a base plate 10, two upright plates 11 disposed on the base plate 10, and an adjusting plate 12 slidably disposed on the two upright plates 11 in a direction that can move closer to or away from the lead wire transmission track 1. The bottom of the adjusting plate 12 is provided with two sliding grooves 78 for the top of the upright plates 11 to extend into. A positioning seat 13 is provided between the two upright plates 11. An adjusting screw 14 is rotatably mounted on the positioning seat 13, that is, the positioning seat 13 has a circular hole for the adjusting screw 14 to pass through, and the adjusting screw 14 is respectively engaged with retaining springs on both sides of the positioning seat 13 to axially limit the adjusting screw 14. The bottom of the adjusting plate 12 is provided with a transmission nut 15 that forms a threaded engagement with the adjusting screw 14. By rotating the adjusting screw 14, the adjusting plate 12 can be moved to achieve fine adjustment of the length of a single lead wire after cutting, so as to adapt it to products of different specifications.

[0033] As attached Figure 7 and attached Figure 8As shown, the fixed-length base 7 also includes two limiting protrusions 16. Each limiting protrusion 16 includes a positioning part 17 with a rectangular bottom cross-section and a limiting part 18 with a dovetail-shaped positioning cross-section, which are integrally formed. The upper end of the upright plate 11 is provided with a positioning groove 19, and the positioning part 17 is fixed in the positioning groove 19 by fasteners (screws). The adjusting plate 12 is provided with a limiting groove 20 corresponding to the upper end of the sliding groove 78, which cooperates with the limiting part 18. This design can vertically limit the adjusting plate 12, so that it can only move along the extension direction of the limiting protrusions 16, which greatly improves the stability of the position adjustment of the adjusting plate 12.

[0034] As attached Figure 9 and attached Figure 10 As shown, the cutting mechanism 4 includes a cutting bracket 21, a blade holder 22 located at the end of the lead wire transmission track 1 corresponding to the cutting bracket 21, a lower blade 23 mounted on the blade holder 22, an upper blade 24 movably mounted above the lower blade 23, a cutting cylinder 25 mounted on the cutting bracket 21, and a movable plate 26 connected to the movable end of the cutting cylinder 25. The upper blade 24 is mounted on the movable plate 26. A guide rail 27 is also vertically mounted on the cutting bracket 21, and a slider 28 that cooperates with the guide rail 27 is provided on the movable plate 26. The upper blade 24 is moved closer to the lower blade 23 by the cutting cylinder 25 to cut the lead wire. The structure is simple and the cutting action is highly efficient.

[0035] As attached Figure 9 and attached Figure 10 As shown, the blade holder 22 is provided with a movable groove 29, and a floating block 30 is provided in the movable groove 29. The lower blade 23 is installed in front of the blade holder 22 corresponding to the movable groove 29 to limit the floating block 30. The blade holder 22 is provided with a T-shaped guide block 31 at the inner end of the movable groove 29. The lower end of the T-shaped guide block 31 is provided with a T-shaped guide groove 32 that cooperates with the T-shaped guide block 31. When the floating block 30 moves vertically, the T-shaped guide groove 32 can be vertically displaced relative to the T-shaped guide block 31. A floating spring 33 is provided between the floating block 30 and the blade holder 22 to apply an upward force to the floating block 30. The floating block 30 is provided with a floating groove 34 and a cutting pressure block 35 for confining the lead wire in the floating groove 34. The floating groove 34 is connected to the lead wire groove 5. The cutting pressure block 35 is connected to the floating block 30 by screws. The part of the cutting pressure block 35 that extends into the floating groove 34 is provided with an inner groove for the lead wire to pass through. During the downward movement of the upper blade 24 to cut the lead wire, it comes into contact with the floating block 30 and pushes the floating block 30 downward. The floating block 30 not only makes way for the upper blade 24 so that it can continue to move downward and cooperate with the lower blade 23 to cut the lead wire, but also supports and positions the lead wire, thereby ensuring a good cutting effect.

[0036] As attached Figure 6 , 11 As shown in Figures 12 and 13, the wire bonding mechanism 3 includes a welding base 36 disposed below the lead wire transmission track 1, a lower electrode plate 37 disposed on the welding base 36, a lower welding head 38 disposed on the lower electrode plate 37, a movable seat 39 disposed above the lead wire transmission track 1, an upper electrode plate 40 disposed at the bottom of the movable seat 39, and an upper welding head 41 disposed on the upper electrode plate 40. The welding base 36 is also provided with two columns 42. The movable seat 39 is provided with two linear bearings 43 respectively sleeved on the outer periphery of the corresponding columns 42. The upper ends of the two columns 42 are also provided with cylinder plates 44. A welding cylinder 45 is installed on the cylinder plates 44. The movable end of the welding cylinder 45 is connected to the movable seat 39 to drive the movable seat 39 to move vertically. The middle part of the lead wire transmission track 1 is provided with a welding cut 79 for the lower end of the upper welding head 41 and the upper end of the lower welding head 38 to extend into. The welding cylinder 45 drives the upper welding head 41 to move towards the lower welding head 38 to perform the wire bonding process, which is highly efficient.

[0037] As attached Figures 11-13As shown, the welding wire bonding mechanism 3 further includes a first welding head seat 46 and a second welding head seat 47 respectively disposed on the left and right sides of the lower electrode plate 37; the upper end of the first welding head seat 46 is provided with a first guide groove 48 and a second guide groove 49 extending toward the welding fracture 79 and communicating with the first guide groove 48; a welding head top plate 50 is slidably disposed on the first guide groove 48 along the vertical direction; the lower end of the movable seat 39 is connected to a push screw 51 for pushing the welding head top plate 50 downward when moving downward; a first return spring 52 for applying an upward force to the welding head top plate 50 is disposed at the inner end of the first guide groove 48; a first welding head slide 53 is slidably disposed in the second guide groove 49; a first small welding head 54 is horizontally mounted on the first welding head slide 53; the side of the welding head top plate 50 is provided with a push inclined surface 55 for pushing the first welding head slide 53 toward the direction close to the welding fracture 79 when moving downward; the bottom of the welding head top plate 50 is provided with a first welding head slide 53 for moving upward when moving upward. The lower ends of the first welding head 46 abut against each other to form a limiting flange 56 that limits the upper stroke. A second return spring 57 is also installed on the first welding head seat 46 to apply a force to the first welding head slide 53 in a direction away from the weld fracture 79. A third guide groove 58 is vertically formed on the upper edge of the second welding head seat 47. A second welding head slide 59 is slidably mounted on the upper edge of the third guide groove 58. A second small welding head 60 is horizontally mounted on the upper edge of the second welding head slide 59. The second small welding head 60 and the lower welding head 38 are positioned to the right of each other. The second welding head seat 47 is provided with a limiting plate 61 at its upper end to limit the upper stroke of the second welding head slide 59. A third return spring 62 is installed on the second welding head seat 47 at a position below the second welding head slide 59 to apply an upward force to the second welding head slide 59. When the upper welding head 41 moves downward and abuts against the upper end of the second small welding head 60, the right end of the first small welding head 54 abuts against the left side of the upper welding head 41, and the lower side of the first small welding head 54 abuts against the upper end of the lower welding head 38. During the wire bonding process, the upper welding head 41 and the lower welding head 38 work together to apply a vertical compressive force to the lead wire, while the first small welding head 54 and the second small welding head 60 work together to apply a horizontal compressive force to the lead wire. This creates four positive pressures on the lead wire, pressing it tightly from all sides. In other words, the side corners of the four welding heads are pressed against the four directions of the lead wire. This part is heated and welded into a wire knot with a rectangular cross-section. The weld is not only very strong, but the surface of the wire knot is also smooth and flat, which is conducive to subsequent assembly.

[0038] As attached Figure 14As shown, a set of stop components 63 are respectively provided on the lead wire transport track 1 at the rear positions corresponding to the wire bonding mechanism 3 and the cutting mechanism 4. The stop component 63 includes a stop seat 64, a stop cylinder 65 installed on the stop seat 64, and a wire clamping block 66 installed on the movable end of the stop cylinder 65. The stop cylinder 65 drives the wire clamping block 66 to extend downward into or upward out of the lead wire groove 5. By setting the stop component 63, the transport of the lead wire can be paused in advance before the welding and cutting processes, thereby ensuring the stable operation of the welding and cutting actions.

[0039] As attached Figure 14 As shown, the lead wire transmission track 1 is also equipped with multiple sets of pre-compression components 67. Each pre-compression component 67 includes a pre-compression mounting block 68, a pre-compression block 69, and a pre-compression tension spring 70. The pre-compression mounting block 68 is disposed on the lead wire transmission track 1. The upper end of the pre-compression block 69 is rotatably mounted on the pre-compression mounting block 68. One end of the pre-compression tension spring 70 is fixed to the pre-compression mounting block 68, and the other end of the pre-compression tension spring 70 overlaps with the lower end of the pre-compression block 69, causing the pre-compression block 69 to press the lead wire tightly within the lead wire groove 5. The lower end of the pre-compression block 69 is inclined towards the lead wire transmission direction. The pre-compression block 69 of the pre-compression component 67 can stably confine the lead wire within the groove of the lead wire transmission track 1 under the action of the tension spring, improving its transportation stability. Simultaneously, the pre-compression block 69 can also prevent the lead wire from regressing, thereby avoiding changes in the welding position and cutting length, and facilitating the achievement of uniform length for all cut lead wires.

[0040] As attached Figure 15 As shown, the wire feeding mechanism 2 includes a wire feeding motor 71, a wire feeding wheel 72 rotatably mounted on the wire feeding motor 71, a guide wheel plate 73 mounted on the side of the wire feeding wheel 72, a straightening plate 74 (which can be a combination of a sliding block and a slide rail) slidably mounted on the guide wheel plate 73, a straightening wheel 75 mounted on the straightening plate 74, multiple round pulleys 76 mounted on the upper end of the guide wheel plate 73, and a guide wheel 77 mounted at the beginning of the wire transmission track 1. The wire feeding motor 71 drives the wire feeding wheel 72 to rotate and feed the wire. The wire pulled out by the wire feeding wheel 72 is sequentially wound around the straightening wheel 75, the round pulleys 76, and the guide wheel 77. After the wire is drawn out, it is straightened and guided by the straightening wheel 75, the round pulleys 76, and the guide wheel 77, and finally the straightened wire is introduced into the wire groove 5 of the wire transmission track 1 to ensure its welding and fixed-length cutting effect, which helps to improve product quality.

[0041] As attached Figure 16As shown, the welding device 117 is a conventional welding device. The welding device 117 includes a welding frame 136, an upper electrode plate 137 and a lower electrode plate 138 mounted on the welding frame 136, which can be vertically positioned close to or far apart from each other, and an upper welding head 139 and a lower welding head 140 respectively mounted on the upper electrode plate 137 and the lower electrode plate 138. The movement of the upper electrode plate 137 and the lower electrode plate 138 can be driven by a cylinder. The fixed plate 111 is also equipped with a clamping cylinder 141. The movable end of the clamping cylinder 141 is equipped with a contact pressing block 142 for vertically pressing the moving contact into the contact positioning groove 122 during downward movement. This design allows for a fast and secure welding of the lead wire and the moving contact together.

[0042] As attached Figures 17-19 As shown, the two-stage welding device 119 is used to weld the moving contact to the support groove of the contact support. It includes a welding frame 80, a first welding head assembly 81 and a second welding head assembly 82 disposed on the welding frame 80 above the corresponding contact support, and a support assembly 83 disposed below the contact support. The first welding head assembly 81 includes a first welding cylinder 84 disposed on the welding frame 80, a first welding seat 85 connected to the movable end of the first welding cylinder 84 (the first welding seat 85 and the welding frame 80 are guided by a slider and guide rail), and a support assembly 83 disposed on the first welding head support. The first electrode plate 86 on the base 85 and the first welding head 87 mounted on the first electrode plate 86 for abutting against the upper end of the moving contact when moving downwards. The second welding head assembly 82 includes a second welding cylinder 88 disposed on the welding frame 80, a second welding seat 89 connected to the movable end of the second welding cylinder 88 (the second welding seat 89 and the welding frame 80 are guided by a slider and guide rail), a second electrode plate 90 disposed on the second welding seat 89, and a second welding head 91 mounted on the second electrode plate 90 for abutting against the upper end of the contact support when moving downwards. When the positioning fixture of the core thermal assembly reaches the welding position, the first welding head 87 and the second welding head 91 move downward under the drive of the corresponding welding cylinder and abut against the upper end of the moving contact and the contact support, respectively. At the same time, the support component 83 supports the contact support. The first welding head 87 and the second welding head 91 are energized and conduction is achieved. The contact surfaces between the moving contact and the contact support are welded together under the action of a large current. This realizes the welding of the moving contact with the lead wire to the contact support of the core thermal assembly semi-finished product, which greatly improves the assembly efficiency of the product.

[0043] As attached Figure 17 and attached Figure 18As shown, the support assembly 83 includes a support base plate 92, a support upright plate 93 disposed on the support base plate 92, a support head movable plate 94 (which is vertically slidable on the support upright plate 93 via a slider and guide rail), a welded support head 95 mounted on the support head movable plate 94, a push-pull cylinder 96 mounted on the support base plate 92, a support top block 97 disposed on the movable end of the push-pull cylinder 96 for pushing the support head movable plate 94 upward, and a reset spring 98 whose two ends are respectively connected to the support base plate 92 and the support head movable plate 94 for pulling the support head movable plate 94 downward to reset. A screw can be disposed on the support base plate 92, a screw can be disposed on the upper end of the support upright plate 93, and the two ends of the reset spring 98 can be respectively attached to the two screws. When the push-pull cylinder 96 pushes the support top block 97 to extend, it can push the support head movable plate 94 upward, thereby driving the welding support head 95 to move upward until it touches the lower end of the core heat assembly, supporting it and preventing the downward pressure of the two welding heads from directly acting on the positioning fixture 113, which would cause uneven force on the transmission device and affect the transmission stability. When the push-pull cylinder 96 pulls the support top block 97 to retract, the support head movable plate 94 moves downward to reset under the action of the reset spring 98, without the need for additional electric components to drive it.

[0044] As attached Figure 17 and attached Figure 18 As shown, when the welding support head 95 moves to its upper limit position, the upper end of the welding support head 95 abuts against the lower end of the moving contact. The side of the welding support head 95 is also provided with a side support protrusion 99 for abutting against the lower end of the contact support. The welding support head 95 simultaneously supports the bottom of both the moving contact and the contact support, which greatly improves the support effect on the thermal components of the mechanism and also significantly enhances the welding effect between the moving contact and the contact support.

[0045] As attached Figure 18 As shown, the side of the movable support plate 94 is connected by fasteners (screws) to a U-shaped pressure block 100 for fixing the welding support head 95 to the movable support plate 94. This design enables the positioning and installation of the welding support head 95, and the installation structure is simple, reliable, and easy to assemble and disassemble. (See attached diagram) Figure 18 As shown, the bottom of the movable support head plate 94 is rotatably connected to a follower roller 101 via a pivot. A driving inclined surface 102, corresponding to the position below the follower roller 101, is provided on the support top block 97 to cooperate with the follower roller 101; the two are in rolling cooperation. The driving inclined surface 102 and the follower roller's rolling cooperation not only result in low friction but also allow the vertical component force to push the movable support head plate 94 upwards. The cooperation structure between the movable support head plate 94 and the support top block 97 is simple, reliable, and allows for rapid action. (See attached diagram) Figure 18As shown, the support base plate 92 is provided with an inverted T-shaped groove 103 extending perpendicular to the direction of movement of the welding support head 95, and the bottom of the support top block 97 is provided with an inverted T-shaped sliding part 104 that slides in conjunction with the inverted T-shaped groove 103. This design enables directional sliding of the support top block 97 and improves the stability of the movement of the support top block 97.

[0046] As attached Figure 18 As shown, the upper end of the movable support head plate 94 is threaded with a limiting screw 105, which abuts against the bottom of the positioning fixture 113 of the movement's thermal assembly during upward movement, thus limiting its position. When the limiting screw 105 is rotated, it moves vertically. The limiting screw 105 is also threaded with an anti-loosening nut 106, which abuts against the upper end of the movable support head plate 94 when tightened. This design allows for setting the upper limit position of the movable support head plate 94, enabling the welding support head 95 to accurately and effectively support the moving contact and contact support. Furthermore, the height of the limiting screw 105 is adjustable, allowing for fine-tuning of the upper limit position of the movable support head plate 94 according to actual conditions, providing greater flexibility.

[0047] As attached Figure 17 and attached Figure 19 As shown, the two-stage welding device 119 also includes a secondary clamping assembly 107. The secondary clamping assembly 107 includes a secondary clamping cylinder 108 mounted on the side of the welding frame 80 and a positioning plate 109 disposed on the movable end of the secondary clamping cylinder 108 for pressing the moving contact horizontally into a support groove of the contact support when extended. The positioning plate 109 has a contact positioning recess 110 for embedding the end of the moving contact away from the contact support. During the welding process, the secondary clamping cylinder 108 drives the positioning plate 109 to extend, applying a horizontal constraint force to the moving contact, preventing horizontal displacement during welding and thus improving welding quality.

[0048] As attached Figure 1 and attached Figure 20As shown, the contact feeding device 114 includes a first vibratory plate 143, a first linear vibrating track 144 connected to the discharge end of the first vibratory plate 143, a first linear vibrator 145 disposed at the bottom of the first linear vibrating track 144, and a first translational manipulator 146 disposed on the side of the first linear vibrating track 144 for gripping the moving contacts one by one onto the corresponding positioning fixture 113; the mechanism feeding device 115 includes a second vibratory plate 147, a second linear vibrator 145 connected to the discharge end of the second vibratory plate 147, and a second linear vibrator 145. The system includes a track 148, a second vertical vibrator 149 located at the bottom of the second vertical vibrating track 148, and a second translational manipulator 150 located on the side of the second vertical vibrating track 148 for sequentially gripping the semi-finished thermal components of the movement onto the corresponding positioning fixture 113; the discharge device 120 includes a vision inspection camera 151, a discharge conveying assembly 152, a discharge guide chute 153, a qualified product collection bin 154, and a defective product collection box 155; the vision inspection camera 151 is mounted on a fixed plate 111. The upper part is used to inspect the assembled thermal components of the movement; a guide slot seat 156 is provided between the qualified product collection bin 154 and the defective product collection box 155. A switching cylinder 157 is installed at an incline on the guide slot seat 156. The discharge guide slot 153 is installed on the movable end of the switching cylinder 157. The lower end of the discharge guide slot 153 is located above the qualified product collection bin 154. When the switching cylinder 157 drives the discharge guide slot 153 to move, the upper end of the discharge guide slot 153 is located at a non-standard position. The good product collection box 155 has a first position above it and a second position above it. The material handling assembly 152 includes a material handling frame 158, a horizontal material handling cylinder 159 mounted on the material handling frame 158, a vertical material handling cylinder 160 mounted on the movable end of the horizontal material handling cylinder 159, and a first material handling finger cylinder 161 and a second material handling finger cylinder 162 mounted on the movable end of the vertical material handling cylinder 160 for clamping the core thermal assembly and for clamping the lead wire, respectively. This design enables automatic feeding of contacts and semi-finished core thermal assemblies, as well as inspection of assembled core thermal assemblies, achieving sorting of qualified and defective products, improving efficiency while ensuring product quality.

Claims

1. An assembly device for a circuit breaker core thermal assembly, characterized in that: The device includes a fixed disk (111) and an indexing disk (112) that can rotate relative to the fixed disk (111). Multiple positioning fixtures (113) for workpiece positioning are arranged in a circumferential array on the indexing disk (112). Around the periphery of the indexing disk (112) along the transport direction of the positioning fixtures (113), a contact loading device (114) for sequentially transporting contacts to the positioning fixtures (113), a mechanism loading device (115) for sequentially transporting semi-finished thermal components of the mechanism to the positioning fixtures (113), a lead wire loading device (116) for transporting lead wires to the positioning fixtures (113), and a welding device (117) for welding lead wires to the moving contact. The device comprises: a lead wire translation robot (118) for transporting the movable contact with lead wires to the positioning fixture (113) on the semi-finished core heat assembly; a two-stage welding device (119) for welding the movable contact with lead wires to the contact support of the semi-finished core heat assembly; and a discharge device (120) for discharging the assembled core heat assembly. The lead wire discharge device (116) includes a lead wire transport track (1), a lead wire feeding mechanism (2) arranged sequentially along the extension direction of the lead wire transport track (1), a wire bonding mechanism (3) for bonding wire knots at equal intervals on the lead wires, and a cutting mechanism (4) for cutting the wire bonding parts of the lead wires. The lead wire transport track (1) The guide rail (1) is provided with a guide rail groove (5) for guide rail positioning. In front of the guide rail (1) is a length-fixing mechanism (6) for pulling the guide rail (1) out to a set length for the cutting mechanism (4) to cut to a fixed length. On the side of the length-fixing mechanism (6) is a guide rail translation robot (135) for transporting the cut guide rail to the positioning fixture. The length-fixing mechanism (6) includes a length-fixing base (7), a length-fixing slide cylinder (8) provided on the length-fixing base (7), and a finger cylinder (9) provided on the movable end of the length-fixing slide cylinder (8) for clamping the end of the guide rail. The length-fixing slide cylinder (8) drives the finger cylinder (9) to move towards or away from the guide rail (1). Movement; The fixed-length base (7) includes a base plate (10), two upright plates (11) set on the base plate (10), and an adjustment plate (12) that can slide on the two upright plates (11) in the direction of approaching or moving away from the lead wire transmission track (1). The bottom of the adjustment plate (12) is provided with two sliding grooves (78) for the top of the upright plate (11) to extend into. A positioning seat (13) is provided between the two upright plates (11). An adjustment screw (14) is rotatably installed on the positioning seat (13), and a retaining spring is respectively engaged with the adjustment screw (14) on both sides of the positioning seat (13). The bottom of the adjustment plate (12) is provided with a transmission nut (15) that forms a threaded engagement with the adjustment screw (14).The wire bonding mechanism (3) includes a welding base (36) disposed below the lead wire transmission track (1), a lower electrode plate (37) disposed on the welding base (36), a lower welding head (38) disposed on the lower electrode plate (37), a movable seat (39) disposed above the lead wire transmission track (1), an upper electrode plate (40) disposed at the bottom of the movable seat (39), and an upper welding head (41) disposed on the upper electrode plate (40). The welding base (36) is also provided with two columns (42). The movable seat (39) is provided with two linear bearings (43) respectively sleeved on the outer periphery of the corresponding columns (42). The upper ends of the two columns (42) are also provided with cylinder plates (44), on which welding cylinders (45) are mounted. The movable end of the welding cylinder (45) is connected to the movable seat (39) to drive the movable seat (39) to move vertically. The middle part of the lead wire transmission track (1) is provided with a welding cut-off point (79) for the lower end of the upper welding head (41) and the upper end of the lower welding head (38) to extend into.

2. The assembly equipment for the thermal assembly of a circuit breaker core according to claim 1, characterized in that: The positioning fixture (113) includes a workstation base block (121), a contact positioning groove (122) disposed on the workstation base block (121) for positioning the moving contact, and a product positioning groove (123) for positioning the thermal assembly of the mechanism. A vertical groove (124) is provided vertically through the workstation base block (121). One end of the vertical groove (124) is connected to the contact positioning groove (122). An L-shaped clamping arm (125) is oscillatingly connected in the vertical groove (124) via a rotating shaft. The upper end of the L-shaped clamping arm (125) extends into the vertical groove (124). A first clamping spring (126) is provided between the lower end of the L-shaped clamping arm (125) and the workstation base block (121). The first clamping spring (126) causes the L-shaped clamping arm (125) to swing and clamp the moving contact in the contact positioning groove (122). The indexing plate (112) is provided with a lead wire release cylinder (127) at the position below the lead wire contact translation robot (118). The movable end of the lead wire release cylinder (127) moves upward and pushes the L-shaped clamping arm (125) to swing and release the lead wire. The workstation base block ( 121) A lead wire fixing assembly (128) for clamping the lead wire is also provided at the side of the corresponding contact positioning groove (122) and product positioning groove (123). The lead wire fixing assembly (128) includes a stationary fixing block (129) mounted on the workstation base block (121), a movable fixing block (130) that can move towards or away from the stationary fixing block (129), and a second clamping spring (131) that applies a force to the movable fixing block (130) toward the stationary fixing block (129). The movable fixing block (130) is clamped by the second clamping spring (129). 131) Under the action of the fixed block (129), it moves toward the stationary fixed block and clamps the corresponding lead wire; the fixed plate (111) is also provided with multiple sets of release clamping components (132) for opening the movable fixed block (130) on the corresponding positioning fixture (113) for storing or taking out the lead wire. The release clamping component (132) includes a release cylinder (133) installed on the fixed plate (111) and a release lever (134) set on the movable end of the release cylinder (133) for moving the movable fixed block (130) toward the direction away from the stationary fixed block (129).

3. The assembly equipment for the thermal assembly of a circuit breaker core according to claim 1, characterized in that: The cutting mechanism (4) includes a cutting bracket (21), a blade holder (22) located at the end of the lead wire transmission track (1) of the cutting bracket (21), a lower blade (23) located on the blade holder (22), an upper blade (24) movably located above the lower blade (23), a cutting cylinder (25) located on the cutting bracket (21), and a movable plate (26) connected to the movable end of the cutting cylinder (25). The upper blade (24) is mounted on the movable plate (26). A guide rail (27) is also mounted vertically on the cutting bracket (21). A slider (28) that cooperates with the guide rail (27) is provided on the movable plate (26).

4. The assembly equipment for a circuit breaker core thermal assembly according to claim 3, characterized in that: The blade holder (22) is provided with a movable groove (29), and a floating block (30) is provided in the movable groove (29). The lower blade (23) is installed in front of the movable groove (29) of the blade holder (22) to limit the floating block (30). A T-shaped guide block (31) is provided at the inner end of the movable groove (29) of the blade holder (22). A T-shaped guide groove (32) is provided at the lower end of the T-shaped guide block (31) to cooperate with the T-shaped guide block (31). When the floating block (30) moves vertically, the T-shaped guide groove (32) can be vertically displaced relative to the T-shaped guide block (31). A floating spring (33) is provided between the floating block (30) and the blade holder (22) to apply an upward force to the floating block (30). A floating groove (34) and a cutting pressure block (35) for confining the lead wire in the floating groove (34) are provided on the floating block (30).

5. The assembly equipment for the thermal assembly of a circuit breaker core according to claim 1, characterized in that: The wire bonding mechanism (3) further includes a first welding head seat (46) and a second welding head seat (47) respectively disposed on the left and right sides of the lower electrode plate (37); the upper end of the first welding head seat (46) is provided with a first guide groove (48) along the vertical direction and a second guide groove (49) extending toward the welding fracture (79) and communicating with the first guide groove (48); a welding head top plate (50) is slidably disposed on the first guide groove (48) along the vertical direction; the lower end of the movable seat (39) is connected to a push screw (51) for pushing the welding head top plate (50) downward when moving downward. The first guide groove (48) is provided with a first return spring (52) at its inner end for applying an upward force to the welding head top plate (50). The second guide groove (49) is provided with a first welding head slide (53) slidably disposed therein. A first small welding head (54) is installed on the first welding head slide (53) along the transverse direction. The welding head top plate (50) is provided with a pushing inclined surface (55) on its side for pushing the first welding head slide (53) toward the direction close to the welding fracture (79) when moving downward. The bottom of the welding head top plate (50) is provided with a surface for moving upward with the first welding head slide (53). The lower ends abut against each other to form a limiting flange (56) that limits the upper stroke. A second return spring (57) is also installed on the first welding head seat (46) to apply a force to the first welding head slide (53) in a direction away from the weld fracture (79). A third guide groove (58) is vertically opened on the upper edge of the second welding head seat (47). A second welding head slide (59) is slidably arranged on the upper edge of the third guide groove (58). A second small welding head (60) is horizontally installed on the upper edge of the second welding head slide (59). The second small welding head (60) is on the right side of the lower welding head (38). The upper end of the second welding head seat (47) is provided with a limiting plate (61) for limiting the upper stroke of the second welding head slide (59). The second welding head seat (47) is provided with a third return spring (62) for applying an upward force to the second welding head slide (59) at the position below the second welding head slide (59). When the upper welding head (41) moves downward and abuts against the upper end of the second small welding head (60), the right end of the first small welding head (54) abuts against the left side of the upper welding head (41), and the lower side of the first small welding head (54) abuts against the upper end of the lower welding head (38).

6. The assembly equipment for the thermal assembly of a circuit breaker core according to claim 2, characterized in that: The welding device (117) includes a welding frame (136), an upper electrode plate (137) and a lower electrode plate (138) that can be arranged vertically closer or further away from each other on the welding frame (136), and an upper welding head (139) and a lower welding head (140) respectively arranged on the upper electrode plate (137) and the lower electrode plate (138). The fixed plate (111) is also provided with a pressing cylinder (141). The movable end of the pressing cylinder (141) is provided with a contact pressing block (142) for pressing the moving contact vertically in the contact positioning groove (122) when it moves downward.

7. The assembly equipment for the thermal assembly of a circuit breaker core according to claim 2, characterized in that: The two-stage welding device is used to weld the moving contact to the support groove of the contact support. It includes a welding frame (80), a first welding head assembly (81) and a second welding head assembly (82) disposed on the welding frame (80) corresponding to the upper part of the contact support, and a support assembly (83) disposed below the contact support. The first welding head assembly (81) includes a first welding cylinder (84) disposed on the welding frame (80), a first welding seat (85) connected to the movable end of the first welding cylinder (84), a first electrode plate (86) disposed on the first welding seat (85), and a first welding head (87) mounted on the first electrode plate (86) for abutting against the upper end of the moving contact when moving downward. The second welding head assembly (82) includes a second welding cylinder (88) disposed on the welding frame (80), and a second welding head (87) connected to the movable end of the second welding cylinder (88). The assembly includes a base plate (89), a second electrode plate (90) disposed on the second welding base (89), and a second welding head (91) mounted on the second electrode plate (90) for abutting against the upper end of the contact support when moving downwards; the support assembly (83) includes a support base plate (92), a support upright plate (93) disposed on the support base plate (92), a support head movable plate (94) that can be vertically slidably disposed on the support upright plate (93), a welding support head (95) mounted on the support head movable plate (94), a push-pull cylinder (96) mounted on the support base plate (92), a support top block (97) disposed on the movable end of the push-pull cylinder (96) for pushing the support head movable plate (94) upwards, and a reset spring (98) whose two ends are respectively connected to the support base plate (92) and the support head movable plate (94) for pulling the support head movable plate (94) downwards to reset.

8. The assembly equipment for a circuit breaker core thermal assembly according to claim 2, characterized in that: The contact feeding device (114) includes a first vibratory plate (143), a first linear vibrating track (144) connected to the discharge end of the first vibratory plate (143), a first linear vibrator (145) disposed at the bottom of the first linear vibrating track (144), and a first translational manipulator (146) disposed on the side of the first linear vibrating track (144) for picking up the moving contacts one by one onto the corresponding positioning fixture (113); the core feeding device (115) includes a second vibratory plate (147) and a second linear vibrating track connected to the discharge end of the second vibratory plate (147). (148), a second vertical vibrator (149) disposed at the bottom of the second vertical vibrating track (148), and a second translational manipulator (150) disposed on the side of the second vertical vibrating track (148) for picking up the semi-finished products of the core thermal components one by one onto the corresponding positioning fixture (113); the discharge device (120) includes a vision inspection camera (151), a discharge conveying component (152), a discharge guide chute (153), a qualified product collection bin (154), and a defective product collection box (155); the vision inspection camera (151) is mounted on a fixed plate (113). 1) Used for testing the assembled thermal components of the mechanism; a guide slot seat (156) is provided between the qualified product collection bin (154) and the defective product collection box (155), and a switching cylinder (157) is installed at an incline on the guide slot seat (156). The discharge guide slot (153) is installed on the movable end of the switching cylinder (157), and the lower end of the discharge guide slot (153) is set above the qualified product collection bin (154). When the switching cylinder (157) drives the discharge guide slot (153) to move, the discharge guide slot (153) has an upper position. The first position above the defective product collection box (155) and the second position away from the defective product collection box (155); the discharge conveying assembly (152) includes a discharge rack (158), a discharge horizontal cylinder (159) disposed on the discharge rack (158), a discharge vertical cylinder (160) disposed on the movable end of the discharge horizontal cylinder (159), a first discharge finger cylinder (161) disposed on the movable end of the discharge vertical cylinder (160) for clamping the core heat assembly and a second discharge finger cylinder (162) disposed on the movable end of the discharge vertical cylinder (160) for clamping the lead wire respectively.

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