Continuous stamping die for static contact of circuit breaker

Abstract

The present invention discloses a continuous stamping die for a static contact of a circuit breaker, which includes a support platform, a positioning turntable rotatably arranged on the support platform, and a pressure plate arranged above the positioning turntable. The positioning turntable is driven by a first driving mechanism to rotate intermittently. A plurality of positioning mechanisms for positioning the static contact sheet are arranged at intervals along the circumferential direction on the positioning turntable. The pressure plate is driven by a driving device to move up and down. A punch for stamping the static contact sheet is arranged at the lower part of the pressure plate. A feeding mechanism for conveying the static contact sheet to the positioning turntable is arranged at the side of the support platform. A discharging station is arranged in front of the feeding mechanism on the support platform. The stamping die in the present invention has a reasonable structure, and applying it to produce the static contact of the circuit breaker can effectively improve the production efficiency.

Description

Technical Field

[0001] The present invention relates to a continuous stamping die for a static contact of a circuit breaker, belonging to the field of structural design of production dies for accessories of molded case circuit breakers. Background Art

[0002] A circuit breaker refers to a switching device that can close, carry, and break the current under normal circuit conditions and can also close, carry, and break the current under abnormal circuit conditions within a specified time.

[0003] A molded case circuit breaker is a type of circuit breaker. In a molded case circuit breaker, the static contact is a main component of the power input structure, and the opening and closing of the entire circuit breaker are achieved through the separation and connection of the static contact and the moving contact. Most of the existing static contact structures of molded case circuit breakers are as disclosed in the patent document CN206163443U. When producing the static contact plate, it needs to be stamped and bent multiple times. In the prior art, when producing the static contact of a molded case circuit breaker, each bending process is usually completed on different stamping devices, and frequent transfer is required between different stamping stations, resulting in cumbersome operation and low production efficiency. Summary of the Invention

[0004] In view of this, the present invention aims to provide a continuous stamping die for a static contact of a circuit breaker with a reasonable structure, which is beneficial to improving the production efficiency of the static contact.

[0005] The technical solution for achieving the purpose of the present invention is as follows:

[0006] A continuous stamping die for a static contact of a circuit breaker includes a support platform, a positioning turntable rotatably arranged on the support platform, and a pressing plate arranged above the positioning turntable. The positioning turntable is driven by a first driving mechanism to rotate intermittently. A plurality of positioning mechanisms for positioning the static contact plate are arranged at intervals along the circumferential direction on the positioning turntable. The pressing plate is driven by a driving device to move up and down. A plurality of punching heads for punching the static contact plate are arranged at the lower part of the pressing plate. A feeding mechanism for feeding the static contact plate to the positioning turntable is arranged at the side of the support platform, and a discharging station is arranged in front of the feeding mechanism on the support platform.

[0007] In the above technical solution, the feeding mechanism includes a feeding track and a pushing plate movably arranged on the feeding track. The pushing plate is driven by a second driving mechanism to move along the direction away from and close to the positioning turntable on the feeding track.

[0008] In the above technical solution, the positioning mechanism includes a positioning groove formed at the edge of the positioning turntable and a pressing block arranged on the positioning turntable corresponding to each positioning groove one by one. The pressing block is rotatably arranged on the positioning turntable. One end of the pressing block close to the positioning groove is the pressing end, and the end far from the positioning groove is the unlocking end. A spring for providing clamping elastic force for the pressing block is provided. Under the action of the spring in the normal state, the pressing end is downward and suitable for pressing the static contact plate material in the positioning groove, and the unlocking end tilts upward.

[0009] In the above technical solution, the spring is a helical compression spring arranged between the unlocking end and the positioning turntable.

[0010] In the above technical solution, there is a fixing block at the center of the positioning turntable on the support platform. A resisting plate is provided on one side of the fixing block facing the feeding mechanism. A gap for the unlocking end to pass through is provided between the lower part of the resisting plate and the upper part of the positioning turntable. A pressing surface is provided at the bottom of the resisting plate. When the pressing block passes by the resisting plate during the rotation of the positioning turntable, the pressing surface presses the unlocking end of the pressing block to rotate downward against the pressure of the spring, so that the pressing end tilts upward.

[0011] In the above technical solution, the cross section of the pressing surface is trapezoidal or arc-shaped.

[0012] In the above technical solution, the driving device includes a movable block driven by a cylinder to move back and forth. A pushing block is rotatably installed on the movable block through a mounting shaft. A tension spring is provided between the pushing block and the movable block. When the movable block moves forward, the pushing block pushes the positioning turntable to rotate.

[0013] The present invention has positive effects: When producing the static contact of the circuit breaker using the stamping die in the present invention, the static contact plate material is conveyed to the positioning turntable by the feeding mechanism and locked by the positioning mechanism, and the static contact plate material is driven to rotate intermittently when the positioning turntable rotates. After the positioning turntable rotates one circle, the static contact plate material positioned on the positioning turntable sequentially passes through multiple punches on the pressing plate and is stamped one by one to complete multiple stamping processes. Finally, the stamped and formed static contact is unloaded at the unloading station. In this way, multiple stamping processes can be realized with one stamping die instead of multiple traditional stamping dies, reducing the multiple transfer processes when using multiple stamping equipment and being beneficial to improving production efficiency. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the stamping die in the present invention.

[0015] Figure 2 is Figure 1 a partial enlarged view of A in

[0016] Figure 3 This is a schematic structural view of the fixing block in the present invention.

[0017] Figure 4 This is a schematic structural view of the pressure plate in the present invention.

[0018] The reference numerals shown in the figure are: 1 - support platform; 11 - fixing block; 12 - abutting plate; 121 - abutting surface; 2 - positioning turntable; 21 - positioning groove; 22 - pressing block; 23 - pressing end; 24 - unlocking end; 3 - pressure plate; 31 - punch; 4 - feeding mechanism; 41 - feeding track; 42 - pushing plate; 5 - movable block; 6 - pushing block; 7 - tension spring. Detailed implementation manners

[0019] The following will describe the specific structure of the continuous stamping die for the static contact of the circuit breaker in the present invention with reference to the accompanying drawings of the specification:

[0020] A continuous stamping die for the static contact of a circuit breaker, as Figure 1 and Figure 4 shown, includes a support platform 1, a positioning turntable 2 rotatably arranged on the support platform 1, and a pressure plate 3 arranged above the positioning turntable 2. The positioning turntable 2 is driven by a first driving mechanism to rotate intermittently. A plurality of positioning mechanisms for positioning the static contact sheet are arranged at intervals along the circumferential direction on the positioning turntable 2. The pressure plate 3 is driven by a driving device to move up and down. A plurality of punches 31 for stamping the static contact sheet are arranged at the lower part of the pressure plate 3. A feeding mechanism 4 for conveying the static contact sheet to the positioning turntable 2 is arranged at the side of the support platform 1. A discharging station is arranged in front of the feeding mechanism 4 on the support platform 1, and the stamped and formed static contact on the positioning turntable 2 is unloaded at the discharging station. When using this stamping die to produce the static contact of the circuit breaker, the static contact sheet is conveyed to the positioning turntable 2 by the feeding mechanism and locked by the positioning mechanism, and the static contact sheet is driven to rotate intermittently when the positioning turntable 2 rotates. After the positioning turntable 2 rotates one circle, the static contact sheet positioned on the positioning turntable 2 passes through the plurality of punches on the pressure plate 3 one by one to complete multiple stamping processes. Finally, the stamped and formed static contact is unloaded at the discharging station. In this way, multiple stamping processes can be realized by one stamping die instead of multiple traditional stamping dies, reducing the multiple transfer processes when using multiple stamping devices for production and being beneficial to improving production efficiency.

[0021] In this embodiment, a discharging port (not shown in the figure) is arranged at the discharging station on the support platform 1. During processing, the static contact stamped and formed through multiple stamping processes falls and is recycled through the discharging port when passing through the discharging port during the rotation of the positioning turntable 2. Then, the static contact sheet is loaded onto the positioning turntable 2 at the feeding mechanism 4 for continuous processing.

[0022] In this embodiment, the feeding mechanism 4 includes a feeding track 41 and a pushing plate 42 movably arranged on the feeding track 41. The pushing plate 42 is driven by a second driving mechanism to move on the feeding track 41 in directions away from and close to the positioning turntable 2. During feeding, an operator places the static contact plate on the feeding track 41, and in the process of pushing the pushing plate 42 forward by the second driving mechanism (such as a cylinder), the static contact plate is pushed in the direction of the positioning turntable 2 and is locked by the positioning mechanism on the positioning turntable 2.

[0023] Further, in this embodiment, specifically referring to Figure 1 and Figure 2 as shown, the positioning mechanism includes positioning grooves 21 formed at the edge of the positioning turntable 2 and pressing blocks 22 arranged on the positioning turntable 2 corresponding to the positioning grooves 21 one by one. The pressing blocks 22 are rotatably arranged on the positioning turntable 2. One end of the pressing block 22 close to the positioning groove 21 is a pressing end 23, and the end far from the positioning groove 21 is an unlocking end 24, and a spring for providing clamping elastic force for the pressing block 22 is provided. Under the action of the spring in the normal state, the pressing end 23 is downward and suitable for pressing the static contact plate in the positioning groove 21, and the unlocking end 24 is upwardly warped. During use, the static contact plate is pushed forward by the feeding mechanism 4 and inserted into the positioning groove 21, and the pressing end presses the static contact plate through the elastic force of the spring to achieve reliable positioning. By pressing the unlocking end 24 downward, the pressing end 23 can be upwardly warped.

[0024] The spring in this embodiment is a spiral compression spring arranged between the unlocking end 24 and the positioning turntable. The spiral compression spring is not shown in the figure. In actual operation, the spring can also be a torsion spring.

[0025] Referring to Figure 1 and Figure 3As shown, a fixed block 11 is provided on the support platform 1 at the center of the positioning turntable 2, and a contact plate 12 is provided on the side of the fixed block 11 facing the feeding mechanism 4. A gap is provided between the lower part of the contact plate 12 and the upper part of the positioning turntable 2 for the unlocking end 24 to pass through, and a pressing surface 121 is provided at the bottom of the contact plate 12. When the pressing block 22 passes through the contact plate 12 during the rotation of the positioning turntable 2, the pressing surface 121 presses the unlocking end 24 of the pressing block 22 to overcome the pressure of the spring and rotate downward, thereby causing the clamping end 23 to tilt upward. With the above structure, when the pressing block 22 moves to the feeding mechanism, the pressing surface 121 generates downward pressure on the unlocking end 22 of the pressing block 2 to overcome the elastic force of the spring and tend to cause the clamping end to tilt upward, thereby facilitating the smooth insertion of the static contact sheet into the positioning groove. After the pressing block 22 passes through the contact plate 12, the unlocking end is freed from the constraint of the pressing surface 121, and the clamping end on the pressing block presses the static contact sheet in the positioning groove 21 downward under the elastic force of the spring.

[0026] The above-mentioned fixed block 11 in this embodiment can be designed to be cylindrical, and the center of the positioning turntable 2 has a sleeve hole that is sleeved with the fixed block 11. The rotatable setting of the positioning turntable 2 is realized by the movable sleeve connection between the sleeve hole and the fixed block 11. As a better design, a bearing can be installed between the sleeve hole and the fixed block 11 to reduce friction and make the positioning turntable 2 rotate smoothly.

[0027] In this embodiment, the cross section of the pressing surface 121 is trapezoidal or arc-shaped.

[0028] As a further improvement in this embodiment, the driving device includes a movable block 5 driven by a cylinder to move back and forth, and a push block 6 is rotatably installed on the movable block 5 through an installation shaft. A tension spring 7 is provided between the push block 6 and the movable block 5. When the movable block 5 moves forward, the push block 6 pushes the positioning turntable 2 to rotate. During the extension of the cylinder rod, the movable block 5 is driven to move forward, and the positioning turntable 2 is driven to rotate by the push block 6 against the positioning turntable 2. When the cylinder rod is retracted and the movable block 5 is driven to move backward, when the push block 6 is subjected to external resistance, it can be released by reverse rotation, and after losing resistance, it rotates and resets under the tension of the tension spring 7.

[0029] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A continuous stamping die for the static contact of a circuit breaker, characterized in that, It includes a support platform (1), a positioning turntable (2) rotatably arranged on the support platform (1), and a pressing plate (3) arranged above the positioning turntable (2). The positioning turntable (2) is intermittently rotated by a first driving mechanism. A plurality of positioning mechanisms for positioning the static contact plate are circumferentially and spacedly arranged on the positioning turntable (2). The pressing plate (3) is driven by a driving device to move up and down. A plurality of punches (31) for stamping the static contact plate are arranged at the lower part of the pressing plate (3). A feeding mechanism (4) for feeding the static contact plate to the positioning turntable (2) is arranged at the side of the support platform (1). A discharging station is arranged in front of the feeding mechanism (4) on the support platform (1). The positioning mechanism includes a positioning groove (21) formed at the edge of the positioning turntable (2) and a pressing block (22) arranged on the positioning turntable (2) corresponding to each positioning groove (21). The pressing block (22) is rotatably arranged on the positioning turntable (2). One end of the pressing block (22) close to the positioning groove (21) is a pressing end (23), and the end far from the positioning groove (21) is an unlocking end (24). A spring for providing clamping elastic force for the pressing block (22) is provided. Under the action of the spring in the normal state, the pressing end (23) is downward and suitable for pressing the static contact plate in the positioning groove (21), and the unlocking end (24) tilts upward. There is a fixing block (11) at the center of the positioning turntable (2) on the support platform (1). A resisting plate (12) is arranged on one side of the fixing block (11) facing the feeding mechanism (4). A gap for the unlocking end (24) to pass through is arranged between the lower part of the resisting plate (12) and the upper part of the positioning turntable (2). A pressing surface (121) is arranged at the bottom of the resisting plate (12). When the pressing block (22) passes by the resisting plate (12) during the rotation of the positioning turntable (2), the pressing surface (121) presses the unlocking end (24) of the pressing block (22) to rotate downward against the pressure of the spring, so that the pressing end (23) tilts upward. The center of the positioning turntable (2) has a sleeve hole sleeved with the fixing block (11). The positioning turntable (2) is rotatably arranged by being movably sleeved with the fixing block (11) through the sleeve hole. The spring is a spiral compression spring arranged between the unlocking end (24) and the positioning turntable.

2. The continuous stamping die for the static contact of a circuit breaker according to claim 1, characterized in that, The feeding mechanism (4) includes a feeding track (41) and a pushing plate (42) movably arranged on the feeding track (41). The pushing plate (42) is driven by a second driving mechanism to move on the feeding track (41) in the directions away from and close to the positioning turntable (2).

3. The continuous stamping die for the static contact of a circuit breaker according to claim 1, characterized in that, The cross section of the pressing surface (121) is trapezoidal or arc-shaped.

4. The continuous stamping die for the static contact of a circuit breaker according to claim 1, characterized in that, The driving device includes a movable block (5) driven by a cylinder to move back and forth. A pushing block (6) is rotatably mounted on the movable block (5) through a mounting shaft. A tension spring (7) is provided between the pushing block (6) and the movable block (5). When the movable block (5) moves forward, the pushing block (6) pushes the positioning turntable (2) to rotate.

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