Automatic welding structure of thermocouple

Abstract

The application discloses a thermocouple automatic welding structure, which comprises a workbench, a holding assembly, a mounting shell and a welding assembly. A driving member drives a welding member to move downward, and a positive electrode member is driven by the welding member to move downward to the thermocouple wires to weld the two thermocouple wires. The thermocouple automatic welding structure realizes the fixation of the thermocouple wires through the holding assembly, and the position of the thermocouple wires is limited through the negative electrode member. Then, the welding assembly is used for welding treatment, and after the welding contact reaches the thermocouple wires, the positive electrode member is subjected to external force, so that the shrinkable welding rod is realized under the cooperation of the first spring and the fourth spring, the immediate retraction after the contact with the two thermocouple wires is realized, the thermocouple wires are prevented from being fused due to excessive contact, and the welding work is affected. The welding assembly can realize the immediate retraction after the contact, does not need other structures to be separately controlled, can realize the extension and retraction operation in cooperation with the driving member, is convenient and fast, and is high in stability.

Description

TECHNICAL FIELD

[0001] The present application relates to welding technology, in particular to a thermocouple automatic welding structure. BACKGROUND

[0002] As the main component in the electric heater, the function and quality of the thermocouple directly affect the quality of the electric heater. At present, the processing of the thermocouple needs to weld the terminals of the thermocouple. The existing thermocouple welding machine needs manual clamping of the welding piece during welding. In this case, the operator is easy to be electric shock during welding, thus causing injury. And because the diameter of the thermocouple wire is thin, only instantaneous contact is needed during welding to realize welding. After welding is completed, the welding head needs to be quickly removed to avoid excessive welding that causes the thermocouple wire to be melted and affects welding. SUMMARY

[0003] In order to solve the defects of the prior art, the present application provides a thermocouple automatic welding structure.

[0004] A thermocouple automatic welding structure, comprising:

[0005] A workbench, the workbench is provided with a holding assembly, the holding assembly is used to limit the position of the thermocouple, the holding assembly is provided with a holding seat, a pressing piece and a guide piece, the holding seat is provided with a holding groove accommodating the thermocouple, the lower end of the pressing piece is provided with a negative electrode, the negative electrode presses on the thermocouple wire of the thermocouple, and the guide piece is used to guide the two thermocouple wires close to each other;

[0006] An installation shell provided on the workbench, the lower end of the installation shell is provided with a fixed plate, the upper end of the fixed plate is provided with a driving piece, and the lower end is provided with a welding assembly, the welding assembly comprises:

[0007] A blocking seat, the lower end of the blocking seat is provided with a first push rod and a second push rod;

[0008] A welding piece provided at the lower end of the blocking seat, the welding piece is connected with the lower end of the driving piece, and the lower end of the welding piece is provided with a welding hole;

[0009] A first movable piece provided in the welding piece, the middle of the first movable piece is provided with a horizontal hole and a vertical hole, the horizontal hole is provided with a ball and a limiting piece, the vertical hole is provided with a positive electrode, the limiting piece is used to limit the position of the positive electrode, and the horizontal hole and the vertical hole are communicated through a communication hole;

[0010] A second movable part is arranged inside the welding part and below the first movable part, and the lower end of the second movable part is provided with a first spring inside the welding part, and the positive electrode part extends through the second movable part into the welding hole.

[0011] The driving part drives the welding part to move downwards, and the welding part drives the positive electrode part to move downwards to the thermocouple wire to weld the two thermocouple wires.

[0012] In the application, the upper end of the second push rod is provided with a pushing sleeve, a first movable chamber is formed in the middle of the pushing sleeve, a second spring is arranged in the first movable chamber, the lower end of the second spring is in contact with the second push rod, a rotating part for limiting the rotation of the second push rod is arranged in the first movable chamber, and a first through hole matched with the second push rod is arranged in the middle of the rotating part.

[0013] In the application, the lower end of the second push rod is lower than the lower end of the first push rod, and an insertion hole is further arranged in the middle of the first movable part, the insertion hole is arranged at the upper end of the vertical hole, and the second push rod enters the vertical hole through the insertion hole and is in contact with the positive electrode part.

[0014] In the application, the positive electrode part is sequentially composed of a pushing body, a connecting body, a limiting body, a positioning body and a welding rod from top to bottom, and the pushing body, the connecting body and the limiting body are arranged in the vertical hole.

[0015] In the application, a third spring is arranged in the vertical hole, the third spring is arranged at the upper end of the pushing body, an annular groove is arranged on the outer wall of the pushing body, and the annular groove is matched with the limiting part.

[0016] In the application, the outer part of the connecting body forms a limiting area, the limiting area is arranged between the pushing body and the limiting body, and the limiting part is arranged in the limiting area through the communication hole.

[0017] In the application, a second movable chamber and a second through hole are arranged in the middle of the second movable part, the positioning body is arranged in the second movable chamber, and the welding rod is arranged in the second through hole.

[0018] In the application, a pushing disc is arranged on the welding rod, a fourth spring is arranged at the lower end of the pushing disc, and the fourth spring is sleeved on the welding rod.

[0019] In the application, the elastic force of the fourth spring is greater than the elastic force of the third spring.

[0020] In this invention, the limiting member consists of a pushing part and a limiting part. The diameter of the pushing part is larger than the diameter of the limiting part. A fifth spring is sleeved on the limiting part and is disposed in a transverse hole. A movable hole is formed in the middle of the welded part. A positioning groove is provided on the inner wall of the movable hole. The positioning groove cooperates with the ball for limiting. A spherical protrusion that cooperates with the annular groove is provided on the limiting part.

[0021] The automatic thermocouple welding structure of this invention has the following advantages: The automatic thermocouple welding structure fixes the thermocouple wires using a holding component and applies pressure to the thermocouple wires through a negative electrode component, thus limiting their position. The holding welding component then performs the welding process. Upon contact with the thermocouple wires, the positive electrode component receives external force, causing the welding rod to retract under the cooperation of the first and fourth springs. This ensures immediate retraction after contact with both thermocouple wires, preventing excessive contact that could lead to wire melting and affect the welding process. The welding component enables immediate retraction upon contact, eliminating the need for separate control structures. The extension and retraction operations are achieved conveniently, quickly, and with high stability, all with the assistance of a drive component. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the automatic thermocouple welding structure of the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure of the worktable, fixed plate, drive components, welding components, and retaining components.

[0024] Figure 3 for Figure 2 A schematic diagram of the retaining component structure;

[0025] Figure 4 for Figure 3 A schematic diagram of the retainer and guide structure in the middle;

[0026] Figure 5 for Figure 2 Schematic diagram of the drive components and welding assembly structure;

[0027] Figure 6 for Figure 5 A schematic diagram of the welding assembly structure in the diagram;

[0028] Figure 7 for Figure 6 Top view;

[0029] Figure 8 for Figure 7 Cross-sectional view at point AA;

[0030] Figure 9 for Figure 8a local enlarged view of B in FIG. 1;

[0031] Figure 10 an exploded view of Figure 6 ;

[0032] Figure 11 a structural schematic view of the welding member in Figure 10 ;

[0033] Figure 12 a structural schematic view of the blocking seat in Figure 10 ;

[0034] Figure 13 a structural sectional view of the first movable member in Figure 10 ;

[0035] Figure 14 a structural sectional view of the second movable member in Figure 10 ;

[0036] Figure 15 a structural schematic view of the positive electrode member in Figure 10 ;

[0037] Figure 16 a structural schematic view of the ball, the fifth spring and the limiting member in Figure 10 ;

[0038] Figure 17 another state schematic view of Figure 6 ;

[0039] Figure 18 a schematic view of the positive electrode member, the first movable member and the second movable member in a retracted state in Figure 17 .

[0040] In the diagram: 1. Workbench; 2. Holding assembly; 3. Mounting housing; 4. Fixing plate; 5. Welding assembly; 6. Equipment box; 7. Thermocouple; 8. Holding seat; 9. Pressure application component; 10. Guide component; 11. Holding groove; 12. Negative electrode component; 13. Motor; 14. Rotating shaft; 15. First cylinder; 16. First cylinder rod; 17. Second cylinder; 18. Support rod; 19. Conical hole; 20. Positive electrode component; 21. Placement groove; 22. Welding component; 23. Welding rod; 24. Welding joint; 25. Driving component; 26. Blocking seat; 27. First movable component; 28. Second movable component; 29. ​​Welding hole; 30. First push rod; 31. Second push rod; 32. Pushing body; 33. Second spring; 34. First movable chamber; 35. Pushing sleeve; 36. Rotating component; 36. First through hole. 37. First external thread portion; 38. First internal thread portion; 39. Pushing end; 40. Pushing rod; 41. Insertion hole; 42. Vertical hole; 43. Movable hole; 44. First spring; 45. Positioning groove; 46. Ball; 47. Spherical protrusion; 48. Annular groove; 49. Fifth spring; 50. Transverse hole; 51. Connecting hole; 52. Limiting member; 53. Pushing part; 54. Limiting part; 55. Limiting area; 56. Fourth spring; 57. Third spring; 58. Second external thread portion; 59. Second internal thread portion; 60. Second movable chamber; 61. Second through hole; 62. Positioning body; 63. Connecting body; 64. Limiting body; 65. Pushing disc; 66. Thermocouple wire; 67. Second cylinder rod; 68. Cylinder body; 69. Fixing member; 70. Arc-shaped surface; 71. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Example 1

[0042] like Figures 1 to 17 As shown, this automatic thermocouple welding structure of the present invention includes a worktable 1, a holding assembly 2, a mounting housing 3, a fixing plate 4, and a welding assembly 5. The holding assembly 2 is disposed on the worktable 1, while the welding assembly 5 is disposed on the fixing plate 4. An equipment box 6 is provided at the lower end of the worktable 1. The holding assembly 2 is used to confine the thermocouple 7 to be welded, while the welding assembly 5 is used to perform welding processing on the thermocouple 7 located on the lower holding assembly 2.

[0043] The retaining assembly 2 is set on the workbench 1. The retaining assembly 2 is used to limit the position of the thermocouple 7. The retaining assembly 2 is provided with a retaining seat 8, a pressure member 9 and a guide member 10. The retaining seat 8 is provided with a retaining groove 11 to accommodate the thermocouple 7. The lower end of the pressure member 9 is provided with a negative electrode 12. The negative electrode 12 applies pressure to the thermocouple wire 67 of the thermocouple 7. The guide member 10 is used to guide the two thermocouple wires 67 closer together.

[0044] The lower end of the workbench 1 is provided with a motor 13, a rotating shaft 14 is arranged on the motor 13, a first cylinder 15 is arranged on the rotating shaft 14, a first cylinder rod 16 is arranged on the first cylinder 15, and the pressing piece 9 is arranged on the first cylinder rod 16. The motor 13 drives the first cylinder 15 to rotate, the first cylinder 15 drives the pressing piece 9 to move up and down, so that the pressing piece 9 drives the negative electrode piece 12 to move up and down, and can cooperate with the motor 13 to rotate, so that the position and angle of the negative electrode piece 12 can be changed. Before the thermocouple 7 is placed, the negative electrode piece 12 needs to be moved away, then the motor 13 drives the first cylinder 15 to rotate, so that the pressing piece 9 is rotated to the upper end of the thermocouple wire 67, the first cylinder 15 is started, so that the first cylinder 15 drives the negative electrode piece 12 at the lower end of the pressing piece 9 to press downward on the thermocouple wire 67, and realizes electrical connection.

[0045] A second cylinder 17 is further arranged on the workbench 1, a second cylinder rod 68 is arranged on the second cylinder 17, a supporting rod 18 is arranged on the second cylinder rod 68, and the guide piece 10 is arranged on the supporting rod 18. The guide piece 10 is in the shape of a truncated cone, one end of the guide piece 10 is larger, and the other end is smaller, a tapered hole 19 is formed in the middle of the guide piece 10, and the larger end of the guide piece 10 faces the holding seat 8, so that after the second cylinder 17 drives the guide piece 10 to move, the larger end of the tapered hole 19 is close to the thermocouple wire 67, thereby guiding the two thermocouple wires 67, so that the two thermocouple wires 67 gradually approach, and the positive electrode piece 20 is conveniently moved downward for welding.

[0046] The holding seat 8 is further provided with a placing groove 21 matched with the thermocouple wire 67, and the middle of the placing groove 21 is provided with a welding port 24 matched with a welding rod 23 on the welding piece 22, so that the two thermocouple wires 67 close to each other can be welded. Embodiment 2

[0047] The mounting shell 3 is arranged on the workbench 1, the lower end of the mounting shell 3 is provided with a fixed plate 4, the upper end of the fixed plate 4 is provided with a driving piece 25, and the lower end is provided with a welding assembly 5, and the welding assembly 5 comprises a blocking seat 26, a welding piece 22, a first movable piece 27 and a second movable piece 28. The blocking seat 26 is used to change the position of the first movable piece 27 and the second movable piece 28, thereby indirectly changing the position of the positive electrode piece 20. When the positive electrode piece 20 is retracted into the welding hole 29, the first movable piece 27 can be pushed by the first push rod 30 and the second push rod 31 at the lower end of the blocking seat 26, after the first movable piece 27 is pushed, the second movable piece 28 at the lower end of the first movable piece 27 can be pushed, thereby the positive electrode piece 20 inside the first movable piece 27 and the second movable piece 28 is pushed, the positive electrode piece 20 is kept to protrude from the welding hole 29, and the next time the two thermocouple wires 67 at the lower end are welded by moving downward.

[0048] The lower end of the blocking seat 26 is provided with a first push rod 30 and a second push rod 31. When the driving member 25 drives the welding member 22 to move upward, the driving member 25 can be a cylinder. The second push rod 31 is kept in contact with the pushing body 32 on the positive electrode member 20 first, then the second spring 33 is compressed, and then the first push rod 30 is kept in contact with the first movable member 27.

[0049] The upper end of the second push rod 31 is provided with a pushing sleeve 35. The middle of the pushing sleeve 35 forms a first movable chamber 34. The first movable chamber 34 is provided with the second spring 33. The lower end of the second spring 33 is in contact with the second push rod 31. The first movable chamber 34 is provided with a rotating member 36 for limiting the rotation of the second push rod 31. The middle of the rotating member 36 is provided with a first through hole 37 matched with the second push rod 31.

[0050] The rotating member 36 is provided with a first external thread part 38. The first movable chamber 34 is provided with a first internal thread part 39 matched with the first external thread part 38. Through the cooperation of the first external thread part 38 and the first internal thread part 39, the rotating member 36 is installed to the inner lower end of the pushing sleeve 35.

[0051] The second push rod 31 is composed of a pushing end 40 and a pushing rod 41. The pushing end 40 is arranged at the upper end of the pushing rod 41. The pushing rod 41 is arranged in the first through hole 37. The pushing rod 41 is at the upper end of the rotating member 36 and is arranged at the lower end of the second spring 33.

[0052] The lower end of the second push rod 31 is lower than the lower end of the first push rod 30. The middle of the first movable member 27 is further provided with an insertion hole 42. The insertion hole 42 is located at the upper end of a vertical hole 43. The second push rod 31 enters the vertical hole 43 through the insertion hole 42 and contacts the positive electrode member 20.

[0053] When the lower end of the pushing rod 41 contacts the positive electrode member 20, the driving member 25 continues to drive the welding member 22 to move upward. Then the pushing rod 41 is pushed upward by the positive electrode member 20, the second spring 33 is compressed, and the second push rod 31 moves in the first movable chamber 34. Since the second push rod 31 moves in the first movable chamber 34, the first movable member 27 in motion contacts the first push rod 30, and the first movable member 27 is pushed downward by the first push rod 30.

[0054] The welding piece 22 is arranged at the lower end of the blocking seat 26, and the welding piece 22 is connected with the lower end of the driving piece 25, and the lower end of the welding piece 22 is provided with a welding hole 29. The middle of the welding piece 22 is formed with a movable hole 44, and the upper end of the movable hole 44 is opened, so as to facilitate the installation of the first movable piece 27, the second movable piece 28 and the first spring 45. The welding piece 22 is composed of a cylinder 69 and a fixing piece 70, and the fixing piece 70 is connected with the driving piece 25.

[0055] A positioning groove 46 is arranged on the inner wall of the movable hole 44, and the positioning groove 46 cooperates with the ball 47 to limit the position, as shown in the figure, when the ball 47 is arranged in the positioning groove 46, at this time, the spherical convex 48 on the limiting piece 53 is arranged in the annular groove 49, so as to limit the position of the positive pole piece 20, and the fifth spring 50 at this time is kept in a slightly compressed state, and can be compressed under external force. Figure 9

[0056] The first movable piece 27 is arranged in the interior of the welding piece 22, and the middle of the first movable piece 27 is provided with a transverse hole 51 and a vertical hole 43, and the transverse hole 51 and the vertical hole 43 are arranged vertically and are communicated through a communication hole 52. The ball 47 and the limiting piece 53 are arranged in the transverse hole 51, and the positive pole piece 20 is arranged in the vertical hole 43, and the limiting piece 53 is used for limiting the position of the positive pole piece 20.

[0057] The limiting piece 53 is composed of a pushing part 54 and a limiting part 55, and the diameter of the pushing part 54 is larger than the diameter of the limiting part 55, and the diameter of the pushing part 54 cooperates with the inner diameter of the transverse hole 51, and the diameter of the limiting part 55 cooperates with the inner diameter of the communication hole 52. The fifth spring 50 is sleeved on the limiting part 55, the fifth spring 50 is arranged in the transverse hole 51, one end of the fifth spring 50 is in contact with the pushing part 54, and the other end is in contact with the inner wall of the transverse hole 51.

[0058] Since the middle of the welding piece 22 is formed with the movable hole 44, the inner wall of the movable hole 44 is provided with the positioning groove 46, and the positioning groove 46 cooperates with the ball 47 to limit the position. And the limiting part 55 is provided with the spherical convex 48 matched with the annular groove 49, the spherical convex 48 can cooperate with the annular groove 49 to limit the position of the positive pole piece 20, cooperate with the fifth spring 50 and the ball 47 to limit the position of the first movable piece 27, and the position of the positive pole piece 20 is limited through the cooperation of the spherical convex 48 and the annular groove 49. The limiting part 55 is provided with an arc surface 71 matched with the pushing body 32, and the spherical convex 48 is arranged on the arc surface 71.

[0059] When the ball 47 is in the positioning groove 46, the limiting part 55 will not be pushed out of the transverse hole 51, and when the ball 47 is not in the positioning groove 46, the limiting part 55 can be pushed out of the transverse hole 51 and into the limiting area 56.

[0060] ​And, the elastic force of the fourth spring 57 is greater than that of the third spring 58, and the length of the fourth spring 57 is greater than that of the third spring 58, and the elastic force of the second spring 33 plus the elastic force of the third spring 58 is greater than the elastic force of the fourth spring 57, so that the two springs can push the fourth spring 57. As shown in Figure 8 the fourth spring 57 is in a compressed state, and the third spring 58 is in a normal state, but the positive part 20 is provided with an annular groove 49, and the annular groove 49 is matched with the spherical convex 48 on the limiting part 53 to limit the movement of the positive part 20.

[0061] The second movable part 28 is arranged inside the welding part 22 and located at the lower end of the first movable part 27, and the first outer threaded part 59 is arranged on the first movable part 27, and the second inner threaded part 60 is arranged in the middle of the second movable part 28.

[0062] The middle of the second movable part 28 is provided with the second movable chamber 61 and the second through hole 62, and the positioning body 63 is arranged in the second movable chamber 61, and the welding rod 23 is arranged in the second through hole 62.

[0063] The lower end of the second movable part 28 is provided with the first spring 45, as shown in Figure 8 the first spring 45 is in a compressed state, when the welding rod 23 is placed on the two thermocouple wires 67, it is impacted by external force, so that the positive part 20 can be forced to move upward, and the annular groove 49 is kept out of the limitation of the spherical convex 48. The fourth spring 57 pushes the positive part 20 to move upward under the elastic force.

[0064] The positive part 20 and the negative part 12 are welding heads made of conductive material. The welding part 22, the first movable part 27 and the second movable part 28 are made of insulating material.

[0065] The first spring 45 is arranged inside the welding part 22, and the positive part 20 extends to the welding hole 29 through the second movable part 28.

[0066] The positive part 20 is composed of the pushing body 32, the connecting body 64, the limiting body 65, the positioning body 63 and the welding rod 23 from top to bottom, and the pushing body 32, the connecting body 64 and the limiting body 65 are arranged in the vertical hole 43. The third spring 58 is arranged in the vertical hole 43, and the third spring 58 is located at the upper end of the pushing body 32, and the outer wall of the pushing body 32 is provided with an annular groove 49, and the annular groove 49 is matched with the limiting part 53.

[0067] The outer part of the connecting body 64 forms the limiting area 56, which is located between the pushing body 32 and the limiting body 65, and the limiting part 53 passes through the communication hole 52 and is arranged in the limiting area 56.

[0068] A pusher plate 66 is provided on the welding rod 23, and a fourth spring 57 is provided at the lower end of the pusher plate 66. The fourth spring 57 is sleeved on the welding rod 23.

[0069] The driving component 25 drives the welding component 22 to move downwards, and the welding component 22 drives the positive electrode component 20 to move downwards onto the thermocouple wire 67 to weld the two thermocouple wires 67.

[0070] like Figure 8 As shown, at this time, the driving component 25 pushes the welded component 22 downward, as... Figure 16 The state shown is such that the welding part 22 is kept separate from the blocking seat 26, allowing the welding rod 23 to move onto the two thermocouple wires 67 for welding. At the instant the welding rod 23 strikes the two thermocouple wires 67, the welding rod 23 is subjected to a reverse pushing force, causing it to move upwards. This causes the positive electrode 20 to be moved upwards by an external force, thereby keeping the pushing body 32 pushing the spherical protrusion 48 so that the spherical protrusion 48 is no longer confined within the annular groove 49, restricting the position of the positive electrode 20. Under the elastic force of the fourth spring 57, the positive electrode 20 is moved upward and the third spring 58 is compressed, so that the limiting area 56 reaches the connecting hole 52. At this time, the limiting member 53 is no longer restricted by the pushing body 32, so the second movable member 28 can be pushed upward under the elastic force of the first spring 45, keeping the ball 47 out of the positioning groove 46, so that the ball 47 pushes the limiting member 53 to compress the fifth spring 50, keeping the limiting member 53 inserted into the limiting area 56, restricting the position of the limiting body 65, so that the ball 47 moves upward with the first movable member 27, and then contacts the inner wall of the movable hole 44, keeping the second movable member 28 driving the positive electrode 20 to move upward. After the welding rod 23 is impacted, it can quickly retract upward by the elastic force of the fourth spring 57 and the second spring 33, avoiding prolonged contact that could cause the welding of the two thermocouple wires 67 to fail. After welding, there will be excess thermocouple wires 67, which can be cut off at the next station.

[0071] like Figure 17As shown, the state at this time is the state that the positive pole piece 20 is contracted, after the two thermocouple wires 67 are welded, the welding piece 22 can be driven by the driving piece 25 to move upwards, first keep the second push rod 31 in contact with the pushing body 32, because the positive pole piece 20 is limited by the limiting piece 53, that is, keep the limiting piece 53 in the limiting area 56, the second push rod 31 cannot push the positive pole piece 20 downwards, only can keep the second push rod 31 pushed by the positive pole piece 20, compress the second spring 33, and the second push rod 31 moves into the first movable chamber 34. Then keep the first push rod 30 in contact with the first movable piece 27, so that the first movable piece 27 is pushed, the second movable piece 28 moves with the first movable piece 27, so that the ball 47 moves downwards, the ball 47 enters the positioning groove 46, and then the first spring 45 is compressed, the first spring 45 is compressed by the first push rod 30 pushing the first movable piece 27. The fifth spring 50 pushes the limiting piece 53 into the transverse hole 51, keeps the limiting piece 53 out of the limiting area 56, so that the pushing body 32 is pushed by the second spring 33 and the third spring 58, so that the spherical convex 48 enters the annular groove 49 again. The limiting piece 53 is made of rubber material of insulating material, and slightly deforms under stress, so that the spherical convex 48 can be extruded by the pushing body 32, so that the spherical convex 48 is extruded and deformed by the outer wall of the pushing body 32, and then the spherical convex 48 enters the annular groove 49 to limit the position of the positive pole piece 20.

[0072] At the same time, the position of the first movable piece 27 is prevented from moving excessively, a limiting pin (not shown in the figure) is arranged outside the welding piece 22, the limiting pin passes through the barrel 69 and cooperates with the first movable piece 27, and a vertical strip-shaped hole cooperating with the limiting pin is arranged on the first movable piece 27.

[0073] It is worth mentioning that the welding method of the present application includes direct current arc welding.

[0074] The above only describes the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A thermocouple automatic welding structure characterized by comprising: include: A workbench is provided with a holding assembly for limiting the position of the thermocouple. The holding assembly includes a holding seat, a pressure applying member, and a guide. The holding seat has a holding groove for accommodating the thermocouple. The lower end of the pressure applying member has a negative electrode that applies pressure to the thermocouple wires. The guide is used to guide the two thermocouple wires closer together. A mounting housing is mounted on a workbench. The lower end of the mounting housing has a fixing plate, the upper end of the fixing plate has a driving component, and the lower end has a welding assembly. The welding assembly includes: A blocking seat, wherein the lower end of the blocking seat is provided with a first push rod and a second push rod; A welded component is provided at the lower end of the blocking seat, the welded component is connected to the lower end of the driving component, and the lower end of the welded component is provided with a welding hole; A first movable component is disposed inside the welded component. The first movable component has a horizontal hole and a vertical hole in the middle. A ball and a limiting component are disposed in the horizontal hole. A positive electrode component is disposed in the vertical hole. The limiting component is used to limit the position of the positive electrode component. The horizontal hole and the vertical hole are connected by a connecting hole. The second movable component is disposed inside the welded component and located at the lower end of the first movable component. The lower end of the second movable component is provided with a first spring, which is located inside the welded component. The positive electrode extends through the second movable component into the weld hole. The driving component drives the welding component to move downwards, and keeps the welding component driving the positive electrode component to move downwards onto the thermocouple wires to weld the two thermocouple wires. The positive electrode component is composed of a pusher, a connector, a limiting body, a positioning body, and a welding rod from top to bottom. The pusher, connector, and limiting body are arranged in the vertical hole. The welding rod is provided with a pusher plate, and the lower end of the pusher plate is provided with a fourth spring, which is sleeved on the welding rod.

2. The thermocouple automatic welding structure according to claim 1, wherein The upper end of the second push rod is provided with a push sleeve, and a first movable chamber is formed in the middle of the push sleeve. A second spring is provided in the first movable chamber, and the lower end of the second spring contacts the second push rod. A rotating component for limiting the rotation of the second push rod is provided in the first movable chamber, and a first through hole for cooperating with the second push rod is provided in the middle of the rotating component.

3. The thermocouple automatic welding structure according to claim 2, wherein The lower end of the second push rod is lower than the lower end of the first push rod. The first movable part is also provided with an insertion hole in the middle. The insertion hole is located at the upper end of the vertical hole. The second push rod enters the vertical hole through the insertion hole and contacts the positive electrode.

4. The thermocouple automatic welding structure according to claim 1, wherein A third spring is provided inside the vertical hole. The third spring is located at the upper end of the pusher. An annular groove is provided on the outer wall of the pusher. The annular groove cooperates with the limiting member.

5. The thermocouple automatic welding structure according to claim 1, wherein A limiting area is formed on the outside of the connector, the limiting area is located between the pusher and the limiting body, and the limiting member is placed in the limiting area through the connecting hole.

6. The thermocouple automatic welding structure according to claim 1, wherein The second movable component has a second movable chamber and a second through hole in the middle. The positioning body is disposed in the second movable chamber, and the welding rod is disposed in the second through hole.

7. The thermocouple automatic welding structure according to claim 1, wherein The elastic force of the fourth spring is greater than that of the third spring.

8. The thermocouple automatic welding structure according to claim 4, wherein The limiting part is composed of a pushing part and a limiting part, the diameter of the pushing part is larger than that of the limiting part, the fifth spring is sleeved on the limiting part, the fifth spring is arranged in the transverse hole, the middle of the welding part is formed with a movable hole, the inner wall of the movable hole is provided with a positioning groove, the positioning groove is matched with the ball to limit, the limiting part is provided with a spherical convex which is matched with the annular groove.

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