A molded case circuit breaker production, manufacturing, assembly and assembly machinery

Abstract

The invention discloses a machine for manufacturing and assembling molded case circuit breakers, which relates to the technical field of circuit breaker production, and comprises an assembly frame and a positioning device, wherein a shielding frame is fixedly installed on the front and rear walls of the assembly frame, a rotating rod is rotatably installed on the inner wall of the assembly frame, a blanking plate is fixedly installed on the circumferential surface of the rotating rod, a servo motor is fixedly installed on the front side of the assembly frame, a transport roller is fixedly installed on the output end of the servo motor, and a transport belt is arranged on the circumferential surface of the transport roller, wherein the positioning device comprises a positioning groove, a placement frame, an electric push rod, an assembly plate, a positioning hole, a positioning rod and an arc surface rod, the arc surface rod moves to contact with a shell cover and squeezes the shell cover, and at the same time, the arc surface rod is subjected to the reaction force of squeezing the shell cover and moves in a direction away from the placement plate, and the design of the arc surface rod can effectively put the inclined shell cover in the correct position, and further ensure its docking stability and accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breaker production, and in particular to a machine for producing, manufacturing and assembling molded case circuit breakers. Background Art

[0002] The manufacturing and assembly machinery for molded case circuit breakers usually consists of docking brackets, positioning devices and protective devices.

[0003] The patent with patent announcement number CN110993446B relates to a molded case circuit breaker production, manufacturing and assembly machinery, including a base, a lower conveyor for conveying the bottom shell of the molded case circuit breaker, an upper conveyor for conveying the shell cover of the molded case circuit breaker, a horizontal movement mechanism, a vertical movement mechanism, two clamping and pressing mechanisms and two blocking clamping mechanisms; the machinery provided by this patent can be assembled in the molded case circuit breaker assembly line for use, and can fully realize the alignment assembly of the plastic shell of the molded case circuit breaker, and can realize streamlined automatic operation, which greatly improves production efficiency, increases production capacity and reduces production costs.

[0004] The above-mentioned patent can be assembled and used in the assembly line of molded case circuit breakers, and can fully realize the alignment assembly of the plastic shell of the molded case circuit breaker, and can realize streamlined automatic operation, which greatly improves production efficiency, increases production capacity and reduces production costs. However, it is difficult to align the tilted shell cover and bottom cover, and the tilted shell cover and bottom cover cannot be accurately docked, resulting in a decrease in the sealing and structural strength of the circuit breaker. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a molded case circuit breaker production, manufacturing, and assembly machinery, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a molded case circuit breaker production and assembly machine, including an assembly frame and a positioning device, wherein the front and rear walls of the assembly frame are fixedly installed with a shielding frame, the inner wall of the assembly frame is rotatably installed with a rotating rod, the circumferential surface of the rotating rod is fixedly installed with a blanking plate, the front side of the assembly frame is fixedly installed with a servo motor, the output end of the servo motor is fixedly installed with a transport roller, and the circumferential surface of the transport roller is provided with a transport belt, wherein the positioning device includes a positioning groove, a placement frame, an electric push rod, an assembly plate, a positioning hole, a positioning rod and a curved rod, the operation of the electric push rod drives the assembly plate to move in a direction close to the shell cover, and the assembly plate moves in a direction close to the shell cover and the bottom cover to drive the positioning rod to move The movement of the positioning rod drives the arc rod to move, the arc rod moves to contact the shell cover and squeeze the shell cover, and at the same time, the arc rod is subjected to the reaction force of squeezing the shell cover and moves in the direction away from the placement plate, the positioning groove is opened at the top of the conveyor belt, the placement frame is fixedly installed on the surface of the assembly frame, the electric push rod is fixedly installed on the inner wall of the placement frame, the assembly plate is fixedly installed on the output end of the electric push rod, the positioning hole is opened on the surface of the assembly plate, the positioning rod is fixedly installed on the inner wall of the positioning hole, and the arc rod is slidably installed on the circumferential surface of the positioning rod, wherein the anti-warping device includes a placement hole, a placement plate and a placement rod, the placement hole is opened at the top of the assembly plate, the placement plate is fixedly installed on the inner wall of the placement hole, and the placement rod slides through the upper and lower walls of the placement plate.

[0007] According to the above technical solution, a spring is fixedly installed on one side of the assembly plate close to the placement frame, and a No. 1 spring is arranged between the positioning rod and the arc rod. The No. 1 spring can drive the arc rod to reset, and the spring is in contact with the arc rod.

[0008] According to the above technical solution, a clockwork spring is arranged between the rotating rod and the assembly frame, one end of the clockwork spring is arranged on the inner wall of the assembly frame and the other end is arranged on the circumferential surface of the rotating rod. The rotating rod can be driven to reset by the clockwork spring, and the arc surface rod is arranged as an arc surface on the side close to the placement frame, and the arc surface rod contacts the inner wall of the positioning hole. There are two groups of electric push rods, assembly plates, positioning holes, positioning rods and arc surface rods, and in the other group, the arc surface rod and the assembly plate squeeze the bottom cover.

[0009] According to the above technical solution, it also includes an anti-warping device and a protective device. The anti-warping device also includes a hollow U-shaped rod, an H-shaped rod and a reset spring. The H-shaped rod squeezes and fixes the top of the shell cover to prevent the shell cover from warping due to excessive squeezing when the shell cover and the bottom cover are docked. The hollow U-shaped rod is fixedly installed at both ends of the placement rod, the H-shaped rod is fixedly installed on the surface of the hollow U-shaped rod, and the reset spring is arranged between the placement plate and the placement rod.

[0010] According to the above technical solution, one end of the hollow U-shaped rod close to the arc surface rod is set as an arc surface, the hollow U-shaped rod is in contact with the arc surface rod, a fitting groove is opened on the top of the assembly plate, and the elastic coefficient of the No. 1 spring is greater than that of the return spring.

[0011] According to the above technical scheme, the protection device includes a detection frame, a detection plate, a detection rod, a stabilizing plate, a linkage frame, a linkage plate, a hollow rod, a slider, a limit groove and a hose. The slider moves downward to contact the limit groove and limit the output end of the electric push rod. The slider limits the output end of the electric push rod to prevent the assembly plate from excessively squeezing the shell cover and the bottom cover. The detection frame is fixedly installed on the top of the hollow U-shaped rod, the detection plate is slidably installed on the inner wall of the detection frame, the detection rod is fixedly installed on the bottom of the detection plate, the stabilizing plate is fixedly installed on the top of the electric push rod, the linkage frame is fixedly installed on the top of the stabilizing plate, the linkage plate is slidably installed on the inner wall of the linkage frame, the hollow rod is fixedly installed on the bottom of the linkage plate, the slider is slidably installed on the inner wall of the hollow rod, the limit groove is opened on the circumferential surface of the output end of the electric push rod, and the hose is arranged between the detection frame and the linkage frame.

[0012] According to the above technical solution, a No. 2 spring is arranged between the detection frame and the detection plate, and the No. 2 spring can drive the detection plate to reset. Liquid is arranged inside the detection frame, and liquid is arranged inside the linkage frame.

[0013] According to the above technical solution, a No. 3 spring is arranged between the hollow rod and the slider, one end of the No. 3 spring is arranged on the top of the slider and the other end is arranged on the inner wall of the hollow rod. The slider can be driven to reset by the No. 3 spring, and one end of the slider close to the limit groove is set as an inclined surface, and the hollow rod passes through the upper and lower walls of the stabilizing plate.

[0014] The present invention provides a molded case circuit breaker manufacturing and assembly machine. It has the following beneficial effects:

[0015] (1) The assembly machinery for manufacturing and assembling molded case circuit breakers performs preliminary positioning of the shell cover and bottom cover by placing the shell cover and bottom cover to be assembled into the positioning groove. The positioning groove can help to accurately align the shell cover and bottom cover, reduce assembly problems caused by inaccurate docking, and thus improve the accuracy of the overall assembly. The shell cover is squeezed and adjusted by the arc rod under the elastic force of the No. 1 spring. The design of the arc rod can effectively place the inclined shell cover in the correct position, further ensuring its docking stability and accuracy. At the same time, the arc rod moves in a direction away from the placement plate and contacts the spring sheet. The contact friction between the arc rod and the spring sheet generates vibration, which makes it easier for the shell cover and bottom cover to find the best docking position, thereby ensuring that the two can be accurately docked.

[0016] (2) The assembly machinery for manufacturing and assembling molded case circuit breakers moves the H-shaped rod downward to contact the top of the shell cover and squeeze and fix the top of the shell cover. The H-shaped rod squeezes and fixes the top of the shell cover to prevent the shell cover from tilting up due to excessive squeezing when docking with the bottom cover. The downward pressing design of the H-shaped rod can assist in fixing the top of the shell cover to reduce local excessive squeezing, thereby avoiding the shell cover from tilting up due to uneven pressure and causing inaccurate docking position. The hollow U-shaped rod is squeezed by the arc rod and moves upward to break away from the contact with the top of the shell cover, which facilitates the continued movement of the assembled shell cover and the bottom cover. By facilitating the continued movement of the assembled shell cover and the bottom cover, the assembly process is smoother, which helps to increase the speed of the overall assembly.

[0017] (3) The assembly machinery for manufacturing and assembling the molded case circuit breaker moves downward through the linkage plate squeezed by the liquid entering the linkage frame. The linkage plate moves downward, driving the hollow rod downward. The hollow rod moves downward, driving the slider downward. The slider moves downward and contacts the limit groove to limit the output end of the electric push rod. The slider limits the output end of the electric push rod to prevent the assembly plate from excessively squeezing the shell cover and the bottom cover. The slider limits the movement range of the electric push rod to prevent the shell cover and the bottom cover from being excessively squeezed during the assembly process, thereby avoiding damage or deformation, and ensuring that the pressure and docking conditions are consistent during each assembly process, thereby improving the stability of the assembly quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the position structure of the transport roller and the transport belt of the present invention;

[0020] Figure 3 This is a schematic diagram of the position structure of the cambered rod and the spring piece of the present invention;

[0021] Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlargement of part A;

[0022] Figure 5 This is a schematic diagram of the location structure of the positioning hole and the cambered rod of the present invention;

[0023] Figure 6 For the present invention Figure 5 A schematic diagram of the structure of part B in the middle is enlarged;

[0024] Figure 7 For the present invention Figure 5 Schematic diagram of the enlarged structure of part C in the middle.

[0025] In the figure: 1. assembly frame; 2. shielding frame; 3. rotating rod; 4. blanking plate; 5. servo motor; 6. transport roller; 7. transport belt; 8. positioning slot; 9. placement frame; 10. electric push rod; 11. assembly plate; 12. positioning hole; 13. positioning rod; 14. arc rod; 15. spring; 161. placement hole; 162. placement plate; 163. placement rod; 164. hollow U-shaped rod; 165. H-shaped rod; 166. reset spring; 171. detection frame; 172. detection plate; 173. detection rod; 174. stabilizing plate; 175. linkage frame; 176. linkage plate; 177. hollow rod; 178. slider; 179. limit slot; 1710. hose. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-Figure 7 , one embodiment of the present invention is: a molded case circuit breaker production and assembly machine, including an assembly frame 1, and also including a positioning device, wherein the front and rear walls of the assembly frame 1 are fixedly installed with a shielding frame 2, the inner wall of the assembly frame 1 is rotatably installed with a rotating rod 3, the circumferential surface of the rotating rod 3 is fixedly installed with a blanking plate 4, the front side of the assembly frame 1 is fixedly installed with a servo motor 5, the output end of the servo motor 5 is fixedly installed with a transport roller 6, and the circumferential surface of the transport roller 6 is provided with a transport belt 7, wherein the positioning device includes a positioning groove 8, a placement frame 9, an electric push rod 10, an assembly plate 11, a positioning hole 12, a positioning rod 13 and a curved rod 14, the positioning groove 8 is opened at the top of the transport belt 7, the placement frame 9 is fixedly installed on the surface of the assembly frame 1, and the electric push rod 10 is fixedly installed on the placement frame 9 The inner wall, the assembly plate 11 is fixedly installed at the output end of the electric push rod 10, the positioning hole 12 is opened on the surface of the assembly plate 11, the positioning rod 13 is fixedly installed on the inner wall of the positioning hole 12, and the arc rod 14 is slidably installed on the circumferential surface of the positioning rod 13, wherein the anti-warping device includes a placement hole 161, a placement plate 162 and a placement rod 163, the placement hole 161 is opened on the top of the assembly plate 11, the placement plate 162 is fixedly installed on the inner wall of the placement hole 161, the placement rod 163 slides through the upper and lower walls of the placement plate 162, the positioning groove 8 can help to accurately align the shell cover and the bottom cover, reduce assembly problems caused by inaccurate docking, and the design of the arc rod 14 can effectively put the inclined shell cover in the correct position, further ensuring its docking stability and accuracy.

[0028] A spring 15 is fixedly installed on one side of the assembly plate 11 close to the placement frame 9, and a No. 1 spring is arranged between the positioning rod 13 and the arc rod 14. The No. 1 spring can drive the arc rod 14 to reset. The spring 15 contacts the arc rod 14, and the vibration makes it easier for the shell cover and the bottom cover to find the best docking position, thereby ensuring that the two can be accurately docked.

[0029] A clockwork spring is arranged between the rotating rod 3 and the assembly frame 1, one end of the clockwork spring is arranged on the inner wall of the assembly frame 1 and the other end is arranged on the circumferential surface of the rotating rod 3. The clockwork spring can drive the rotating rod 3 to reset. The arc rod 14 is arranged as an arc surface on the side close to the placement frame 9, and the arc rod 14 contacts the inner wall of the positioning hole 12. There are two groups of electric push rods 10, assembly plates 11, positioning holes 12, positioning rods 13 and arc rods 14, and in the other group, the arc rod 14 and the assembly plate 11 squeeze the bottom cover.

[0030] When this embodiment is working: the shell cover and bottom cover to be assembled are placed into the positioning groove 8 to perform preliminary positioning of the shell cover and the bottom cover, and at the same time, the servo motor 5 drives the transport roller 6 to rotate, and the rotation of the transport roller 6 drives the transport belt 7 to move, and the transport belt 7 moves to transport the shell cover and the bottom cover inside the positioning groove 8. When the shell cover and the bottom cover are transported to the assembly point, the electric push rod 10 drives the assembly plate 11 to move in the direction close to the shell cover, and the assembly plate 11 moves in the direction close to the shell cover and the bottom cover to drive the positioning rod 13 to move, and the positioning rod 13 moves to drive the arc rod 14 to move, and the arc rod 14 moves to contact with the shell cover and squeeze the shell cover. At the same time, the arc rod 14 is subjected to the reaction force of squeezing the shell cover and moves in the direction away from the placement plate 162. The arc rod 14 moves in the direction away from the placement plate 162 to squeeze the No. 1 spring. The No. 1 spring is squeezed by the arc rod 14 to produce deformation and accumulate force. At the same time, the arc rod 14 squeezes the shell cover under the elastic force of the No. 1 spring and corrects the position of the shell cover. After the shell cover is positioned correctly, the electric push rod 10 continues to operate to drive the assembly plate 11 to squeeze the shell cover. The shell cover is squeezed by the assembly plate 11 and contacts the bottom cover to complete the assembly of the shell cover and the bottom cover. At the same time, the arc rod 14 moves in the direction away from the placement plate 162 and contacts the spring piece 15. The arc rod 14 and the spring piece 15 contact and rub to generate vibration. The vibration of the spring piece 15 drives the arc rod 14 to resonate together. After the assembly of the shell cover and the bottom cover is completed, the electric push rod 10 operates to drive the assembly plate 11 to move in the direction away from the shell cover. The assembly plate 11 moves in the direction away from the shell cover and breaks away from the contact with the shell cover. The assembly plate 11 breaks away from the contact with the shell cover, so that the arc rod 14 moves and resets in the direction close to the placement plate 162 under the elastic force of the No. 1 spring. After the assembly plate 11 breaks away from the contact with the shell cover, the conveyor belt 7 continues to move to transport the assembled shell cover and the bottom cover to the top of the blanking plate 4. The shell cover and the bottom cover transported to the top of the blanking plate 4 slide off the blanking plate 4 for subsequent bolt locking and fixing.

[0031] See also Figure 1-Figure 7 On the basis of the above embodiment, another embodiment of the present invention further includes an anti-warping device and a protective device. The anti-warping device also includes a hollow U-shaped rod 164, an H-shaped rod 165 and a reset spring 166. The hollow U-shaped rod 164 is fixedly installed at both ends of the placement rod 163, the H-shaped rod 165 is fixedly installed on the surface of the hollow U-shaped rod 164, and the reset spring 166 is arranged between the placement plate 162 and the placement rod 163. The downward pressing design of the H-shaped rod 165 can assist in fixing the top of the shell cover to reduce local excessive extrusion, thereby avoiding the shell cover from tilting up due to uneven pressure and causing inaccurate docking position.

[0032] One end of the hollow U-shaped rod 164 close to the arc surface rod 14 is set as an arc surface, the hollow U-shaped rod 164 is in contact with the arc surface rod 14, a fitting groove is opened on the top of the assembly plate 11, and the elastic coefficient of the No. 1 spring is greater than that of the return spring 166.

[0033] The protection device includes a detection frame 171, a detection plate 172, a detection rod 173, a stabilizing plate 174, a linkage frame 175, a linkage plate 176, a hollow rod 177, a slider 178, a limit groove 179 and a hose 1710. The detection frame 171 is fixedly mounted on the top of the hollow U-shaped rod 164, the detection plate 172 is slidably mounted on the inner wall of the detection frame 171, the detection rod 173 is fixedly mounted on the bottom of the detection plate 172, the stabilizing plate 174 is fixedly mounted on the top of the electric push rod 10, and the linkage frame 175 is fixedly mounted. At the top of the stabilizing plate 174, the linkage plate 176 is slidably installed on the inner wall of the linkage frame 175, the hollow rod 177 is fixedly installed on the bottom of the linkage plate 176, the slider 178 is slidably installed on the inner wall of the hollow rod 177, the limiting groove 179 is opened on the circumferential surface of the output end of the electric push rod 10, the hose 1710 is arranged between the detection frame 171 and the linkage frame 175, and the slider 178 prevents the shell cover and the bottom cover from being excessively squeezed during the assembly process by limiting the movement range of the electric push rod 10, thereby avoiding damage or deformation.

[0034] A No. 2 spring is provided between the detection frame 171 and the detection plate 172 , and the No. 2 spring can drive the detection plate 172 to reset. Liquid is provided inside the detection frame 171 , and liquid is provided inside the linkage frame 175 .

[0035] A No. 3 spring is arranged between the hollow rod 177 and the slider 178. One end of the No. 3 spring is arranged on the top of the slider 178 and the other end is arranged on the inner wall of the hollow rod 177. The No. 3 spring can drive the slider 178 to reset. The end of the slider 178 close to the limiting groove 179 is arranged as an inclined surface, and the hollow rod 177 passes through the upper and lower walls of the stabilizing plate 174.

[0036] When the present embodiment is working, the arc rod 14 is subjected to the reaction force of squeezing the shell cover and moves in the direction away from the placement plate 162. The arc rod 14 moves in the direction away from the placement plate 162 and breaks away from the contact with the hollow U-shaped rod 164. After the hollow U-shaped rod 164 breaks away from the contact with the arc rod 14, the placement rod 163 moves downward under the elastic force of the reset spring 166. The placement rod 163 moves downward to drive the hollow U-shaped rod 164 to move downward. The hollow U-shaped rod 164 moves downward to drive the H-shaped rod 165 to move downward. The H-shaped rod 165 moves downward to contact the top of the shell cover and squeeze and fix the top of the shell cover. The H-shaped rod 165 squeezes the top of the shell cover. The pressure fixation prevents the shell cover and the bottom cover from tilting due to excessive squeezing when they are connected. When the arc rod 14 moves and resets in the direction close to the placement plate 162 under the elastic force of spring No. 1, the arc rod 14 moves and resets and contacts and squeezes the hollow U-shaped rod 164. The hollow U-shaped rod 164 is squeezed by the arc rod 14 and moves upward to break away from the contact with the top of the shell cover to facilitate the continued movement of the assembled shell cover and bottom cover. At the same time, the hollow U-shaped rod 164 moves upward to drive the placement rod 163 to move upward. The placement rod 163 moves upward to pull the reset spring 166. The reset spring 166 is pulled by the placement rod 163 to deform and accumulate force.

[0037] The placement rod 163 moves downward under the elastic force of the return spring 166, and the placement rod 163 moves downward to drive the hollow U-shaped rod 164 to move downward, and the hollow U-shaped rod 164 moves downward to drive the detection rod 173 to move downward, and the detection rod 173 moves downward to contact the top of the assembly plate 11 and squeeze the top of the assembly plate 11, and at the same time, the detection rod 173 is squeezed and moves upward by the reaction force of the assembly plate 11, and the detection rod 173 moves upward to drive the detection plate 172 to move, and the detection plate 172 moves upward to squeeze the liquid inside the detection frame 171, and the liquid inside the detection frame 171 is squeezed. The detection plate 172 is squeezed into the linkage frame 175 through the hose 1710, and the liquid entering the linkage frame 175 squeezes the linkage plate 176. The linkage plate 176 moves downward due to the squeeze of the liquid entering the linkage frame 175. The linkage plate 176 moves downward, driving the hollow rod 177 to move downward. The hollow rod 177 moves downward, driving the slider 178 to move downward. The slider 178 moves downward and contacts the limiting groove 179 to limit the output end of the electric push rod 10. The slider 178 limits the output end of the electric push rod 10 to prevent the assembly plate 11 from excessively squeezing the shell cover and the bottom cover.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A molded case circuit breaker manufacturing and assembly machine, comprising an assembly frame (1), characterized in that: It also includes a positioning device, an anti-warping device and a protective device; Wherein, a shielding frame (2) is fixedly mounted on the front and rear walls of the assembly frame (1), a rotating rod (3) is rotatably mounted on the inner wall of the assembly frame (1), a blanking plate (4) is fixedly mounted on the circumferential surface of the rotating rod (3), a servo motor (5) is fixedly mounted on the front side of the assembly frame (1), a transport roller (6) is fixedly mounted on the output end of the servo motor (5), and a transport belt (7) is arranged on the circumferential surface of the transport roller (6); The positioning device comprises a positioning groove (8), a placement frame (9), an electric push rod (10), an assembly plate (11), a positioning hole (12), a positioning rod (13) and a curved rod (14), wherein the positioning groove (8) is provided at the top of the conveyor belt (7), the placement frame (9) is fixedly mounted on the surface of the assembly frame (1), the electric push rod (10) is fixedly mounted on the inner wall of the placement frame (9), the assembly plate (11) is fixedly mounted on the output end of the electric push rod (10), the positioning hole (12) is provided on the surface of the assembly plate (11), the positioning rod (13) is fixedly mounted on the inner wall of the positioning hole (12), and the curved rod (14) is slidably mounted on the circumferential surface of the positioning rod (13); The anti-warping device comprises a placement hole (161), a placement plate (162) and a placement rod (163); the placement hole (161) is opened at the top of the assembly plate (11); the placement plate (162) is fixedly mounted on the inner wall of the placement hole (161); and the placement rod (163) slides through the upper and lower walls of the placement plate (162); A spring sheet (15) is fixedly mounted on one side of the assembly plate (11) close to the placement frame (9), a spring No. 1 is arranged between the positioning rod (13) and the arc surface rod (14), and the spring sheet (15) is in contact with the arc surface rod (14); The anti-warping device further comprises a hollow U-shaped rod (164), an H-shaped rod (165) and a return spring (166); the hollow U-shaped rod (164) is fixedly mounted on both ends of the placement rod (163); the H-shaped rod (165) is fixedly mounted on the surface of the hollow U-shaped rod (164); and the return spring (166) is arranged between the placement plate (162) and the placement rod (163); One end of the hollow U-shaped rod (164) close to the curved rod (14) is arranged as a curved surface, the hollow U-shaped rod (164) is in contact with the curved rod (14), and a fitting groove is provided on the top of the assembly plate (11).

2. The molded case circuit breaker manufacturing and assembly machine according to claim 1, characterized in that: A spring is provided between the rotating rod (3) and the assembly frame (1); a side of the arc surface rod (14) close to the placement frame (9) is provided as an arc surface; and the arc surface rod (14) contacts the inner wall of the positioning hole (12).

3. The molded case circuit breaker manufacturing and assembling machine according to claim 1, characterized in that: The protective device comprises a detection frame (171), a detection plate (172), a detection rod (173), a stabilizing plate (174), a linkage frame (175), a linkage plate (176), a hollow rod (177), a slider (178), a limit groove (179) and a hose (1710); the detection frame (171) is fixedly mounted on the top of the hollow U-shaped rod (164); the detection plate (172) is slidably mounted on the inner wall of the detection frame (171); the detection rod (173) is fixedly mounted on the bottom of the detection plate (172); and the stabilizing plate (174) is fixedly mounted on the bottom of the detection plate (176). The detection frame (171) is fixedly mounted on the top of the electric push rod (10), the linkage frame (175) is fixedly mounted on the top of the stabilizing plate (174), the linkage plate (176) is slidably mounted on the inner wall of the linkage frame (175), the hollow rod (177) is fixedly mounted on the bottom of the linkage plate (176), the slider (178) is slidably mounted on the inner wall of the hollow rod (177), the limiting groove (179) is provided on the circumferential surface of the output end of the electric push rod (10), and the hose (1710) is arranged between the detection frame (171) and the linkage frame (175).

4. The molded case circuit breaker manufacturing and assembling machine according to claim 3, characterized in that: A No. 2 spring is provided between the detection frame (171) and the detection plate (172), liquid is provided inside the detection frame (171), and liquid is provided inside the linkage frame (175).

5. The molded case circuit breaker manufacturing and assembling machine according to claim 4, characterized in that: A No. 3 spring is arranged between the hollow rod (177) and the slider (178); one end of the slider (178) close to the limiting groove (179) is arranged as an inclined surface; and the hollow rod (177) passes through the upper and lower walls of the stabilizing plate (174).

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