Ejector rod structure and circuit breaker

Abstract

The utility model discloses a push rod structure and a circuit breaker, the push rod structure is matched with a magnetic flux release and an operating mechanism of the circuit breaker, the operating mechanism comprises a draw bar, the push rod is rotatably arranged, one side of the push rod is matched with the magnetic flux release, and the other side of the push rod is matched with the operating mechanism; the traction rod is provided with an avoiding structure; in the first state, the magnetic flux release drives the ejector rod to rotate, and the ejector rod is linked with the traction rod through the avoiding structure; with the adoption of the structural arrangement, a section of stroke is increased in the length direction of the ejector rod through the avoiding structure, so that the distance between the traction rod and the magnetic flux release is shortened in a disguised manner, the overall structure is more compact, and the installation and use of the circuit breaker in a small-size environment are met.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, specifically to a top rod structure and a circuit breaker. Background Technology

[0002] The circuit breaker includes a flux trip unit and an operating mechanism. The operating mechanism includes a traction rod, lever, etc., and a push rod is provided between the flux trip unit and the operating mechanism. When the flux trip unit actuates, it drives the push rod to move, which in turn drives the traction rod to move, achieving the tripping and opening effect. When resetting, the operating mechanism actuates, the lever drives the push rod to move, and the push rod resets the flux trip unit, at which point the operating mechanism performs a resetting action.

[0003] When circuit breakers are in a small-volume environment, the overall space utilization is limited. Specifically, in the length direction, the cooperation distance between the operating mechanism and the magnetic flux trip needs to be shortened to make the internal structure more compact. Obviously, the existing technology cannot shorten the length, so the top rod structure needs to be adjusted. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is how to shorten the cooperation distance between the operating mechanism and the magnetic flux trip device. To this end, a push rod structure is provided, which cooperates with the operating mechanism of the magnetic flux trip device and the circuit breaker. The operating mechanism includes a traction rod, comprising...

[0005] The push rod is rotatably configured, with one side of the push rod engaging with the magnetic flux release device and the other side engaging with the operating mechanism;

[0006] The traction rod is equipped with an obstacle avoidance structure;

[0007] In the first state, the magnetic flux release device drives the top rod to rotate, and the top rod passes through the avoidance structure and is linked with the traction rod.

[0008] The top rod and the traction rod are coaxially arranged.

[0009] The traction rod is provided with a groove, which opens towards the top rod. The bottom surface of the groove is located on the rotation trajectory of the top rod, and the groove forms the avoidance structure.

[0010] The operating mechanism includes a fixed frame, the traction rod rotates relative to the fixed frame, the top rod is provided with a limiting protrusion, and the fixed frame is located on the rotation trajectory of the limiting protrusion.

[0011] It also includes a handle, which cooperates with the operating mechanism. In the second state, the handle drives the top rod to rotate, and the top rod drives the magnetic flux trip device to reset; or, in the second state, the operating mechanism drives the top rod to rotate, and the top rod drives the magnetic flux trip device to reset.

[0012] Therefore, the technical problem to be solved by this invention is how to shorten the cooperation distance between the operating mechanism and the magnetic flux trip device. To this end, a circuit breaker includes the aforementioned push rod structure.

[0013] It also includes a body, which includes a multi-phase circuit, each phase of which is fixed with the operating mechanism, and the multiple operating mechanisms are set independently of each other.

[0014] It also includes a driving component. The main body includes a middle cover and a base. The middle cover and the base cooperate to form a first chamber for accommodating the operating mechanism. The bottom surface of the base is provided with a fixed cavity, which houses a micro switch. The operating mechanism includes a rotating shaft. One end of the driving component is located in the first chamber and on the rotation trajectory of the rotating shaft. The other end of the driving component extends to the fixed cavity. The micro switch is located on the movement trajectory of the other end of the driving component.

[0015] It also includes a circuit board, the micro switch is connected and fixed to the circuit board, and the circuit board is connected and fixed to the bottom surface of the base.

[0016] It also includes a current transformer housing, which is housed in the first chamber. The top surface of the current transformer housing is provided with a first slot, and the middle cover is provided with a second slot on the side facing the base. The magnetic flux trip unit is partially embedded in the first slot and partially embedded in the second slot.

[0017] The technical solution of this utility model has the following advantages:

[0018] 1. The present invention provides a top rod structure. By adopting this structure, the top rod has an increased stroke in the length direction through the avoidance structure, which indirectly shortens the distance between the traction rod and the magnetic flux trip device. The overall structure is more compact, thus meeting the requirements for the installation and use of the circuit breaker in a small volume environment.

[0019] 2. This utility model provides a push rod structure in which the push rod and the traction rod rotate relative to the same axis, specifically the pin of the operating mechanism. The push rod rotates relative to the pin, and the traction rod also rotates relative to the pin, creating a spatial misalignment between the two, thereby satisfying the cooperation between the push rod and the traction rod. Alternatively, the rotation centers of the push rod and the traction rod can also be on different axes.

[0020] 3. The push rod structure provided by this utility model, whether in the first state or the second state, the push rod is partially located in the groove. The mating position between the push rod and the groove is different in different states. In the first state, when the push rod moves, the push rod will pass through the gap space between the left end of the push rod and the bottom surface of the groove, and then achieve abutment with the bottom surface of the groove. Finally, the push rod drives the traction rod to move, so as to achieve the effect of tripping and opening the circuit breaker.

[0021] 4. The top rod structure provided by this utility model has a limiting protrusion that forms a limiting effect.

[0022] 5. The push rod structure provided by this utility model, in its second state, is driven by a handle to move the push rod, ultimately achieving a reset effect. Alternatively, the operating mechanism may include a lever, which can also drive the push rod to rotate, achieving the reset effect.

[0023] 6. The circuit breaker provided by this utility model features a bottom-mounted microswitch, creating an isolation effect between the upper and lower parts of the circuit. This prevents the microswitch from being affected by the strong current in the first chamber, improving the stability of the microswitch signal transmission. The driving component here is made of plastic insulating material.

[0024] 7. This utility model provides a circuit breaker in which the circuit board and micro switch work together, making assembly simpler and reducing production costs. After the circuit board is fixed, the bottom surface of the base can be sealed by the base plate to provide protection. A socket can be installed on the circuit board, and electrical connections between the circuit breaker and internal or external control systems can be achieved via pins.

[0025] 8. The circuit breaker provided by this utility model has a first slot and a second slot that cooperate to form a perimeter protection for the magnetic flux trip device, thereby improving the insulation protection level of the magnetic flux trip device. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the top rod structure provided by this utility model;

[0028] Figure 2 A side view of the top rod structure provided by this utility model;

[0029] Figure 3 A schematic diagram of the structure of the traction rod provided by this utility model;

[0030] Figure 4 A schematic diagram of the circuit breaker provided by this utility model;

[0031] Figure 5 A cross-sectional view of the circuit breaker provided by this utility model;

[0032] Figure 6 A partial structural schematic diagram of the circuit breaker provided by this utility model;

[0033] Figure 7 A schematic diagram of the structure of the middle cover provided by this utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 11. Traction rod; 12. Top rod; 13. Operating mechanism; 14. Magnetic flux release device; 15. Pin; 16. Handle; 17. Body; 18. Drive component; 19. Micro switch; 20. Circuit board; 21. Current transformer cover; 111. Groove; 121. Mating part; 122. Limiting protrusion; 131. Fixing frame; 132. Rotating shaft; 141. Push rod; 171. Middle cover; 172. Base; 173. First chamber; 174. Fixing cavity; 175. Second slot; 211. First slot. Detailed Implementation

[0036] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0040] Example 1

[0041] This embodiment provides a push rod structure, as shown in the attached figure. Figures 1-3 As shown, it cooperates with the magnetic flux trip device and the operating mechanism 13 of the circuit breaker. The operating mechanism 13 includes a traction rod 11. When the traction rod 11 rotates, the other components of the operating mechanism 13 cooperate to move accordingly. Finally, the operating mechanism 13 realizes the tripping of the entire circuit breaker. This is the prior art, so the structure of the operating mechanism 13 is not described in detail in this embodiment.

[0042] The push rod structure includes:

[0043] The top rod 12 is rotatable. Here, the top rod 12 rotates relative to the circuit breaker body, and the top rod 12 can also rotate relative to one of the components of the operating mechanism 13.

[0044] One side of the push rod 12 engages with the magnetic flux trip unit 14, and the other side engages with the operating mechanism 13. In this embodiment, the right side of the push rod 12 engages with the magnetic flux trip unit 14. When the magnetic flux trip unit 14 is working, the engagement between the magnetic flux trip unit 14 and the right side of the push rod 12 causes the push rod 12 to rotate. Conversely, when the push rod 12 is subjected to force, it rotates, and the right side of the push rod 12 also drives the magnetic flux trip unit 14 to reset. Specifically, the reset of the magnetic flux trip unit 14 refers to the fact that the magnetic flux trip unit 14 includes a push rod 141. When a fault occurs in the circuit, the circuit breaker sends a signal to the magnetic flux trip unit 14, and the push rod 141 moves towards the push rod 12. However, the push rod 141 itself does not have a reset function after moving; it can only be pushed back to its initial position by the push rod 12 in the opposite direction. The left side of the push rod 12 engages with the operating mechanism 13.

[0045] The traction rod 11 is equipped with an obstacle avoidance structure.

[0046] In the first state, the magnetic flux trip unit 14 drives the push rod 12 to rotate. The push rod 12, after passing through the avoidance structure, is linked with the traction rod 11. Specifically, in the tripped state, the magnetic flux trip unit 14 receives a trip signal, and the push rod 141 moves horizontally to the left. The push rod 141 drives the right side of the push rod 12 to move, causing the push rod 12 to rotate. The left side of the push rod 12 passes through the avoidance structure and then abuts against the traction rod 11, creating the effect that the push rod 12 drives the traction rod 11 to move. Then the traction rod 11 actuates, causing the other components of the operating mechanism 13 to work, ultimately achieving the effect of tripping and opening the circuit breaker. By adopting this structural design, the avoidance structure increases the stroke of the push rod 12 in the length direction, which indirectly shortens the distance between the traction rod 11 and the magnetic flux trip unit 14, making the overall structure more compact and thus meeting the requirements for installation and use of the circuit breaker in small-volume environments.

[0047] Specifically, as shown in the attached document Figures 1-2 As shown, the push rod 12 and the traction rod 11 are coaxially arranged. The push rod 12 and the traction rod 11 rotate relative to the same axis, which can specifically be the pin 15 of the operating mechanism 13. When the push rod 12 rotates relative to the pin 15, the traction rod 11 also rotates relative to the pin 15, creating a spatial misalignment to satisfy the cooperation between the push rod 12 and the traction rod 11. Both the traction rod 11 and the push rod 12 are sleeved on the pin 15, but when they are not in contact, they are independently arranged. For example, when the push rod 12 is not in contact with the traction rod 11, the rotation of the push rod 12 will not drive the traction rod 11 to move. Alternatively, the rotation centers of the push rod 12 and the traction rod 11 can also be on different axes, that is, the push rod 12 is sleeved on one axis and the traction rod 11 is sleeved on another axis, forming a cooperation.

[0048] Specifically, as shown in the attached document Figures 1-2 As shown, an operating mechanism 13, a push rod 12, and a magnetic flux trip device 14 are arranged along the length of the circuit breaker, with the push rod 12 located between the operating mechanism 13 and the magnetic flux trip device 14.

[0049] Specifically, the center of the pin 15, the leftmost and rightmost points of the push rod 12 are connected to form a triangular structure. The distance between the pin 15 and the leftmost and rightmost points of the push rod 12 can be adjusted by those skilled in the art according to actual needs.

[0050] Specifically, as shown in the attached document Figures 1-3As shown, the traction rod 11 has a groove 111, which opens towards the top rod 12. The bottom surface of the groove 111 is located on the rotation trajectory of the top rod 12, forming a clearance structure. In both the first and second states, the top rod 12 is partially located within the groove 111. The engagement position between the top rod 12 and the groove 111 differs in each state. In the first state, when the top rod 12 moves, it passes through the gap between its left end and the bottom surface of the groove 111, then abuts against the bottom surface of the groove 111. Finally, the top rod 12 drives the traction rod 11 to move, achieving the tripping effect. Here, the groove 111 creates an interlacing effect along the length of the circuit breaker, increasing the stroke of the top rod 12 and effectively shortening the distance between the traction rod 11 and the magnetic trip unit 14. Compared to the prior art where the top rod 12 directly abuts against the traction rod 11, increasing the overall length of the circuit breaker, this design makes installation and use in small-volume environments impossible. In addition, the traction rod 11 can also be provided with a long groove, and the top rod 12 is provided with a support foot that extends into the long groove. The support foot moves back and forth in the long groove, which can also create misalignment and increase the stroke of the top rod 12.

[0051] Specifically, the push rod 12 is generally triangular or V-shaped. The mating point between the push rod 12 and the pin 15 is located in the lower region of the push rod 12. The other side of the push rod 12 mates with the operating mechanism 13, and one side of the push rod 12 mates with the magnetic flux release device 14. Alternatively, the rotation point of the push rod 12 can also be located in the upper region of the push rod 12.

[0052] Specifically, as shown in the attached document Figures 1-2 As shown, a mating part 121 is provided on one side of the top rod 12. The width of the mating part 121 is greater than the width of the rest of the top rod 12. The mating part 121 is used to cooperate with the magnetic flux trip unit 14. When the magnetic flux trip unit 14 is working, the front end of the magnetic flux trip unit 14 abuts against the mating part 121 and drives the top rod 12 to rotate, forming a driving effect. Moreover, the top rod 12 with this structure forms a plate-like structure, which can reduce the size in the width direction for single-phase independent operating mechanisms 13, thereby making the entire circuit breaker more compact and more suitable for small-volume environments.

[0053] Specifically, as shown in the attached document Figures 1-2 As shown, the operating mechanism 13 includes a fixed frame 131, a traction rod 11 that rotates relative to the fixed frame 131, and a limiting protrusion 122 on the top rod 12. The fixed frame 131 is located on the rotation trajectory of the limiting protrusion 122. The limiting protrusion 122 provides a limiting effect.

[0054] Specifically, as shown in the attached document Figures 1-2As shown, it also includes a handle 16, which cooperates with the operating mechanism 13. In the second state, the handle 16 drives the push rod 12 to rotate, and the push rod 12 drives the magnetic flux trip device 14 to reset. Specifically, in the re-clamping state, the handle 16 drives the operating mechanism 13 to perform the re-clamping action. At the same time, the handle 16 abuts against the left side of the push rod 12, driving the push rod 12 to rotate. The right side of the push rod 12 cooperates with the push rod 141, causing the push rod 141 to reset, thus resetting the magnetic flux trip device 14. Here, the cooperation between the handle 16 and the left side of the push rod 12 is specifically that there is a notch at the lower end of the handle 16, which cooperates with the left side of the push rod 12 to create the effect of driving the push rod 12 to rotate.

[0055] Alternatively, in the second state, the operating mechanism 13 drives the push rod 12 to rotate, and the push rod 12 drives the magnetic flux trip device 14 to reset. Here, the operating mechanism 13 includes a lever, which drives the push rod 12 to rotate, achieving the reset effect.

[0056] Example 2

[0057] This embodiment provides a circuit breaker, as shown in the attached diagram. Figures 1-7 As shown, it includes:

[0058] Top rod structure. The top rod structure has been described in detail in Embodiment 1, so it will be described in detail in the middle of this embodiment.

[0059] Specifically, it also includes a body 17, which comprises a multi-phase circuit. Each phase circuit has a fixed operating mechanism 13, and the multiple operating mechanisms 13 are independently configured. For example, when the body 17 includes a two-phase circuit, it includes two operating mechanisms 13, which are independently configured at all times. In this case, two corresponding push rod structures are also provided, forming an independent structure. The operator can operate one phase circuit individually. As another example, when the body 17 includes a three-phase circuit, it includes three operating mechanisms 13, which are independently configured at all times. In this case, two corresponding push rod structures are also provided, forming an independent structure.

[0060] Specifically, as shown in the attached document Figure 5As shown, the device also includes a drive component 18. The main body 17 includes a middle cover 171 and a base 172. The middle cover 171 and the base 172 cooperate to form a first chamber 173 for accommodating the operating mechanism 13. The bottom surface of the base 172 has a fixed cavity 174, which houses a micro switch 19. The operating mechanism 13 includes a rotating shaft 132. One end of the drive component 18 is located in the first chamber 173 and on the rotation trajectory of the rotating shaft 132. The other end of the drive component 18 extends into the fixed cavity 174, and the micro switch 19 is located on the movement trajectory of the other end of the drive component 18. When the rotating shaft 132 rotates, it drives the drive component 18 to move vertically downward, causing the micro switch 19 to operate and generate a signal. The downward placement of the micro switch 19 creates an isolation effect, preventing the micro switch 19 from being affected by the strong current in the first chamber 173 and improving the stability of the signal transmission of the micro switch 19. Here, the drive component 18 is made of plastic insulating material. The drive component 18 is also provided with a limiting structure, which abuts against the bottom surface of the base 172 to prevent the drive component 18 from entering the first chamber 173 as a whole. The limiting mechanism here can be a boss structure.

[0061] Specifically, as shown in the attached document Figure 5 As shown, the system also includes a circuit board 20, with micro switches 19 connected and fixed to it. The micro switches 19 are soldered and fixed to the circuit board 20. In this embodiment, the number of micro switches 19 is the same as the number of operating mechanisms 13. The micro switches 19 and the circuit board 20 are electrically connected. The circuit board 20 is connected and fixed to the bottom surface of the base 172. The cooperation between the circuit board 20 and the micro switches 19 simplifies assembly and reduces production costs. After the circuit board 20 is fixed, the bottom surface of the base 172 can be sealed by the base plate to provide protection. A socket can be installed on the circuit board 20, and electrical connection between the socket and the pins can be achieved between the circuit breaker's internal or external control system.

[0062] Specifically, as shown in the attached document Figures 6-7 As shown, it also includes a current transformer housing 21, which is housed in a first chamber 173. The top surface of the current transformer housing 21 has a first slot 211, and the middle cover 171 has a second slot 175 on the side facing the base 172. A flux trip unit 14 is partially embedded in the first slot 211 and partially embedded in the second slot 175. The first slot 211 and the second slot 175 cooperate to form a protective perimeter around the flux trip unit 14, improving its insulation protection level.

[0063] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A push rod structure, which cooperates with a magnetic flux trip unit (14) and an operating mechanism (13) of a circuit breaker, said operating mechanism (13) including a traction rod (11), characterized in that, include, The top rod (12) is rotatably configured. One side of the top rod (12) is engaged with the magnetic flux release device (14), and the other side of the top rod (12) is engaged with the operating mechanism (13). The traction rod (11) is equipped with an avoidance structure; In the first state, the magnetic flux release device (14) drives the top rod (12) to rotate, and the top rod (12) is linked with the traction rod (11) through the avoidance structure.

2. The top rod structure according to claim 1, characterized in that, The top rod (12) and the traction rod (11) are coaxially arranged.

3. The top rod structure according to claim 1, characterized in that, The traction rod (11) is provided with a groove (111), the groove (111) is open on the side facing the top rod (12), the bottom surface of the groove (111) is located on the rotation trajectory of the top rod (12), and the groove (111) forms the avoidance structure.

4. The top rod structure according to claim 1, characterized in that, The operating mechanism (13) includes a fixed frame (131), the traction rod (11) rotates relative to the fixed frame (131), the top rod (12) is provided with a limiting protrusion (122), and the fixed frame (131) is located on the rotation trajectory of the limiting protrusion (122).

5. The top rod structure according to claim 1, characterized in that, It also includes a handle (16), which cooperates with the operating mechanism (13). In the second state, the handle (16) drives the top rod (12) to rotate, and the top rod (12) drives the magnetic flux trip device (14) to reset; or, in the second state, the operating mechanism (13) drives the top rod (12) to rotate, and the top rod (12) drives the magnetic flux trip device (14) to reset.

6. A circuit breaker, characterized in that, Includes the top rod structure as described in any one of claims 1-5.

7. The circuit breaker according to claim 6, characterized in that, It also includes a body (17), which includes a multi-phase circuit, each phase circuit is fixed with the operating mechanism (13), and the multiple operating mechanisms (13) are set independently of each other.

8. The circuit breaker according to claim 7, characterized in that, It also includes a drive member (18). The body (17) includes a middle cover (171) and a base (172). The middle cover (171) and the base (172) cooperate to form a first chamber (173) for accommodating the operating mechanism (13). The bottom surface of the base (172) is provided with a fixed cavity (174). The fixed cavity (174) accommodates a micro switch (19). The operating mechanism (13) includes a rotating shaft (132). One end of the drive member (18) is located in the first chamber (173) and on the rotation trajectory of the rotating shaft (132). The other end of the drive member (18) extends to the fixed cavity (174). The micro switch (19) is located on the movement trajectory of the other end of the drive member (18).

9. The circuit breaker according to claim 8, characterized in that, It also includes a circuit board (20), the micro switch (19) is connected and fixed to the circuit board (20), and the circuit board (20) is connected and fixed to the bottom surface of the base (172).

10. The circuit breaker according to claim 8, characterized in that, It also includes a transformer housing (21), which is housed in the first chamber (173). The top surface of the transformer housing (21) is provided with a first slot (211), and the middle cover (171) is provided with a second slot (175) on the side facing the base (172). The magnetic flux trip device (14) is partially embedded in the first slot (211) and partially embedded in the second slot (175).

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