A leakage tripping mechanism for a leakage circuit breaker

Abstract

The present invention relates to a leakage tripping mechanism for a leakage circuit breaker, comprising a circuit breaker housing, a handle, a tripper disposed within the circuit breaker housing, and a tripping mechanism, the tripping mechanism comprising a lock, a tripping latch, and a lock spring, the tripping mechanism further comprising a bracket, a paddle, and a lever, the bracket being rotatably disposed within the housing via a first mounting shaft, the first mounting shaft being rotatably provided with a lock, the paddle being rotatably disposed within the housing via a second mounting shaft, the paddle being disposed in contact with a top rod on the tripper, the lever being provided with a first arm and a second arm, the first arm being disposed in contact with an upper end surface of the paddle, the second arm being provided with a long slot, the lock and the second arm being linked and coordinated via a pull rod, one end of the pull rod being fixed to the lock, and the other end being slidably disposed within the long slot. By adopting the above-mentioned technical solution, the present invention provides a leakage tripping mechanism for a leakage circuit breaker, which has a reasonable layout, high space utilization, and does not affect the space occupied by the magnetic ring.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a leakage tripping mechanism of a leakage circuit breaker. Background Art

[0002] Electromagnetic leakage circuit breakers, especially multi-pole leakage circuit breakers, require a large space for the magnetic ring. Some products have unstable product performance due to the small space for the magnetic ring. Therefore, a reasonable trip mechanism is needed to reasonably utilize the space. Summary of the Invention

[0003] Purpose of the present invention: In order to overcome the defects of the prior art, the present invention provides a leakage tripping mechanism of a leakage circuit breaker, which has a reasonable layout and high space utilization and does not affect the space occupied by the magnetic ring.

[0004] The technical solution of the present invention is as follows: a leakage tripping mechanism of a leakage circuit breaker, comprising a circuit breaker housing, a handle, a tripper arranged in the circuit breaker housing, and a tripping mechanism, wherein the tripping mechanism comprises a lock, a jumper, and a lock spring, wherein the jumper is rotatably arranged in the circuit breaker housing, and the jumper and the handle are linked by a connecting rod, the lock is rotatably arranged, and the lock spring acts on the lock, prompting one end of the lock to form a conflict with the jumper to realize the closing operation of the handle, and the tripping mechanism also comprises a bracket, a paddle, and a paddle, wherein the jumper is rotatably arranged on the bracket, and the bracket is rotatably arranged in the circuit breaker housing through a first mounting shaft, the lock is arranged on the first mounting shaft, and the paddle is passed through the paddle. The second mounting shaft is rotatably arranged in the circuit breaker housing and is located above the tripper. The paddle is arranged to be in contact with the top rod on the tripper. The paddle rod is provided with a first arm and a second arm. The first arm is arranged to be in contact with the upper end surface of the paddle. The second arm is provided with a long slot. The lock and the second arm are linked by a pull rod. One end of the pull rod is fixed on the lock, and the other end is slidably arranged in the long slot. The tripper pushes the paddle to swing, driving the paddle rod to swing, thereby driving the lock to swing to achieve tripping. A paddle spring for resetting the paddle and a bracket spring for resetting the bracket are also provided in the housing. The paddle spring is arranged on the paddle, and one end is in contact with or spaced apart from the bracket.

[0005] The cam is then pulled back to engage the first mounting shaft, which is then pushed back to engage the first mounting shaft, and the spring is ... The movable pull rod moves to the left side of the long slot, and the product is in the closed position. When leakage current occurs in the circuit and is greater than the current that the trip device can withstand, the top rod on the trip device moves upward, the pull piece rotates around the second mounting axis, and drives the pull rod to rotate, thereby driving the pull rod placed in the long slot to move, pulling the lock to unlock the lock and the jump lock, and the bracket returns to its position under the action of the bracket spring. The handle returns to its position under the action of the handle spring, and the pull rod moves to the right side of the long slot. At this time, under the action of the pull piece spring force, the pull piece pushes the top rod into the trip device, and the product is completely disconnected. The setting of the long slot allows the pull rod to move freely and the angle and space for the pull rod to rotate are small, which is conducive to saving space. During the disconnection process, the bracket contacts the pull piece spring. This leakage trip mechanism has a small overall size, is easy to install, and has good stability.

[0006] Further configuration of the present invention: the paddle spring is arranged using a torsion spring, the paddle is provided with a placement groove, a first contact surface and a second contact surface, the paddle spring is installed in the placement groove, and the first side of the paddle spring contacts the first contact surface, and the second side contacts the second contact surface, the bracket is provided with a boss, the first side of the paddle spring is arranged to contact the boss or is spaced apart from the boss, when the product is closed, the first side of the paddle spring is spaced apart from the boss, and when the product is disconnected, the first side of the paddle spring is arranged to contact the boss.

[0007] With the above further arrangement, there is a gap between the paddle spring and the boss, which makes it easier when the tripper push rod is pushed upward, thereby ensuring that the product is tripped. When the product is disconnected, the boss abuts against the first side of the paddle spring, and the tripper push rod can be pushed back. The torsion spring is sleeved on the paddle with fewer parts, and the assembly is simple and reliable.

[0008] The present invention is further provided with: a partition is provided in the circuit breaker housing, the bracket and the shift rod are both rotatably arranged on the partition, a mounting groove is provided on the partition, a positioning boss is provided on the bracket, the bracket spring is arranged in the mounting groove, and one end is abutted against the side wall of the mounting groove, and the other end is sleeved on the positioning boss.

[0009] By adopting the above-mentioned further arrangement, the bracket spring is limited to prevent it from falling off, and the installation is convenient.

[0010] The present invention is further configured as follows: the lock spring is configured as a torsion spring, the bracket is provided with a positioning column and a resistance boss, the lock spring is sleeved on the positioning column, the lock is provided with a positioning groove, the first side of the lock spring is located in the positioning groove, and the second side is set in resistance on the resistance boss.

[0011] With the above arrangement further adopted, the lock is provided with spaced protrusions, and the positioning groove is formed between the two protrusions, so that the two elastic corners of the lock spring respectively contact the contact protrusion and the positioning groove on the bracket, so that the structure is stable and reset is convenient.

[0012] The present invention is further provided with: the pull rod is arranged in a "U" shape, the lock buckle is provided with a slot, one end of the pull rod is inserted into the slot, and the other end is movably arranged in the long groove.

[0013] By adopting the above-mentioned further arrangement, the structure is firm, the pull rod is not easy to fall off, and it is better to move in the long groove.

[0014] The present invention is further provided with: an arc groove and a mounting boss are provided on the bracket, the jump buckle is provided on the mounting boss, and the connecting rod passes through the jump buckle and is slidably provided in the arc groove.

[0015] The above-mentioned further arrangement is adopted to facilitate the movement of the connecting rod, thereby driving the jump buckle movement.

[0016] The present invention is further provided with an extension plate extending away from the partition plate on the bracket, a receiving groove is formed between the extension plate and the bracket, and the bracket spring is located in the receiving groove.

[0017] By adopting the above-mentioned further arrangement, the spring structure of the bracket is stable and not easy to fall off, so the bracket can be reset better.

[0018] The present invention is further provided with: two mounting posts are provided on the partition, and at least two mounting holes are provided on the release, and the two mounting posts are passed through the corresponding mounting holes to realize the installation of the release.

[0019] By adopting the above-mentioned further configuration, the tripper structure is stabilized, and the top rod of the tripper can better drive the paddle to swing.

[0020] The present invention further provides that: the circuit breaker housing includes a base, a middle base and an upper cover which are separately arranged; the trip mechanism and the tripper are located between the base and the middle base; an installation space for installing a magnetic ring is provided on one side of the trip mechanism on the base; and a through hole is provided on the middle base corresponding to the position of the magnetic ring.

[0021] By adopting the above-mentioned further arrangement, the structure is simple and the assembly and disassembly are convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a specific embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of a tripping mechanism according to a specific embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of a specific embodiment of the present invention when tripping;

[0025] Figure 4 is a schematic diagram of a tripping mechanism according to a specific embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of a specific embodiment of the present invention when it is completely disconnected;

[0027] Figure 6 is a schematic diagram of a plectrum according to a specific embodiment of the present invention;

[0028] Figure 7 is a schematic diagram of a paddle spring according to a specific embodiment of the present invention;

[0029] Figure 8 is a schematic diagram of a shift lever according to a specific embodiment of the present invention;

[0030] Figure 9 is a schematic diagram of a lock according to a specific embodiment of the present invention;

[0031] Figure 10 Schematic diagram of a bracket and a lock buckle according to a specific embodiment of the present invention;

[0032] Figure 11 A schematic diagram of a separator according to a specific embodiment of the present invention;

[0033] Figure 12 Schematic diagram of a bracket and a partition according to a specific embodiment of the present invention;

[0034] Figure 13 is a schematic diagram of a bracket according to a specific embodiment of the present invention;

[0035] Figure 14 is a schematic diagram of the rear side of a bracket according to a specific embodiment of the present invention;

[0036] Figure 15 This is a schematic diagram of a positioning groove on a lock buckle according to a specific embodiment of the present invention;

[0037] Figure 16 Schematic diagram of a seat in a specific embodiment of the present invention. Implementation Method

[0038] The following will clearly and completely describe the technical solutions in this embodiment with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] It should be noted that in the description of the present invention, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being described. In the description of this disclosure, "several" means at least two, such as two or three, unless otherwise specifically defined.

[0041] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] like Figure 1-16As shown, a leakage tripping mechanism of a leakage circuit breaker includes a circuit breaker housing 1, a handle 2, a tripper 3 arranged in the circuit breaker housing 1, and a tripping mechanism 4. The tripping mechanism includes a lock 41, a tripping buckle 42, and a lock spring 43. The tripping buckle 42 is rotatably arranged in the circuit breaker housing 1. The tripping buckle 42 and the handle 2 are linked by a connecting rod 8. The lock is rotatably arranged, and the lock spring 43 acts on the lock 41, prompting one end of the lock 41 to form a conflict with the tripping buckle 42 to realize the handle closing operation. The circuit breaker housing 1 includes a base 15, a middle base 16, and an upper cover that are separately arranged. The tripping mechanism 4 and the tripper 3 are located between the base 15 and the middle base 16. The base 15 is provided with a spring for releasing the tripping mechanism 4 on one side. The installation space 151 for installing the magnetic ring 100 is provided with a through hole 161 on the middle seat 16 corresponding to the position of the magnetic ring 100. The tripping mechanism 4 also includes a bracket 44, a paddle 45 and a lever 46. The trip buckle 42 is rotatably set on the bracket 44. The bracket 44 is rotatably set in the circuit breaker housing 1 through the first installation shaft 5. The lock 41 is set on the first installation shaft 5. The paddle 45 is rotatably set in the circuit breaker housing 1 through the second installation shaft 6 and is located above the tripper 3. The paddle 45 is set in contact with the top rod 30 on the tripper 3. The lever 46 is provided with a first arm 461 and a second arm 462. The first arm 461 is set in contact with the upper end surface of the paddle 45. The second arm 462 is provided with a long slot 4621. The long slot 4621 is set in an elliptical shape, and the lock buckle 41 and the second arm 462 are linked by the pull rod 7. One end of the pull rod 7 is fixed on the lock buckle 41, and the other end is slidably set in the long groove 4621. The pull rod 7 is set in a "U" shape, and a slot 412 is provided on the lock buckle 41. One end of the pull rod 7 is inserted in the slot 412, and the other end is movably set in the long groove 4621. Specifically, an arc groove 445 and a mounting boss 446 are provided on the bracket 44, and the jump buckle 42 is set on the mounting boss 446. The connecting rod 8 passes through the jump buckle 42 and is slidably set in the arc groove 445. The tripper 3 pushes the paddle 45 to swing, drives the paddle 46 to swing, and thereby drives the lock buckle 41 to swing to achieve tripping. A paddle spring 11 for resetting the paddle 45 and a bracket spring 12 for resetting the bracket 44 are also provided. The paddle spring 11 is arranged on the paddle 45, and one end is arranged to conflict with or spaced from the bracket 44. The first mounting shaft 5 is passed through the shaft hole of the bracket 44 and placed into the circuit breaker housing 1. The lock 41 is then placed on the first mounting shaft 5, and the jump buckle 42 and the lock spring 43 are placed on the bracket 44. The bracket spring 12 is located on the lower side of the bracket 44. The trip unit 3 is installed below the paddle 45, and the paddle spring 11 is installed in the paddle 45. The paddle 45 with the paddle spring 11 installed is installed in the circuit breaker housing 1 through the second mounting shaft 6, and the top rod 30 of the trip unit 3 conflicts with the paddle 45. The paddle rod 46 is installed in the circuit breaker housing 1.The first arm 461 of the lever 46 contacts the paddle 45, and the two ends of the pull rod 7 are respectively inserted into the slot 412 of the lock buckle 41 and the long slot 4621 of the pull rod 46, and the handle 2 is pushed. The jump buckle 42 and the lock buckle 41 are engaged under the action of the lock buckle spring 43, and the connecting rod 8 pushes the jump buckle 42 to push the lock buckle 41 and the bracket 44 to rotate clockwise around the first mounting axis 5. The bracket 44 is separated from one end of the paddle spring 11, and the lock buckle 41 drives the pull rod 7 to move to the left side of the long slot 4621. The product is in the closed position. When a leakage current appears in the circuit and is greater than the current that the tripper can withstand, the top rod 30 on the tripper 3 moves upward, and the paddle 45 rotates around the second mounting axis 6. The lever 46 rotates, thereby driving the pull rod 7 placed in the long slot 4621 to move, pulling the lock catch 41 to unlock the lock catch 41 and the trip catch 42. The bracket 44 returns to its original position under the action of the bracket spring 12. The handle 2 returns to its original position under the action of the handle spring, and the pull rod 7 moves to the right side of the long slot 4621. At this time, under the action of the pull piece spring, the pull piece 45 pushes the push rod 30 into the release 3, and the product is completely disconnected. The setting of the long slot 4621 allows the pull rod 7 to move freely and the rotation angle and space of the pull rod 7 are small, which is conducive to saving space. During the disconnection process, the bracket contacts the pull piece spring. This leakage tripping mechanism has a small overall size, is easy to install, and has good stability.

[0043] The paddle spring 11 is provided with a torsion spring, and the paddle 45 is provided with a placement groove 451, a first contact surface 452 and a second contact surface 453. The paddle spring 11 is installed in the placement groove 451, and the first side 111 of the paddle spring 11 contacts the first contact surface 452, and the second side 112 contacts the second contact surface 453. The bracket 44 is provided with a boss 441, and the first side 111 of the paddle spring 11 contacts the boss 441 or contacts the boss 441. The bosses 441 are arranged at intervals. When the product is closed, the first side 111 of the paddle spring 11 is arranged at intervals with the boss 441. When the product is disconnected, the first side 111 of the paddle spring is set in contact with the boss 441. There is a gap between the paddle spring and the boss, which makes it easier when the tripper top rod 30 is pushed upward, and the product can be ensured to be tripped. When the product is disconnected, the boss contacts the first side of the paddle spring, and the tripper top rod 30 can be pushed back. The torsion spring is sleeved on the paddle with fewer parts, and the assembly is simple and reliable.

[0044] A partition 13 is provided in the circuit breaker housing 1, and the bracket 44 and the lever 46 are both rotatably set on the partition 13. A mounting column 133 is provided on the partition 13, and the lever 46 is set on the mounting column 133. The partition 13 is provided with a mounting groove 131, and the bracket 44 is provided with a positioning boss 442. The bracket spring 12 is set in the mounting groove 131, and one end is abutted on the side wall of the mounting groove 131, and the other end is sleeved on the positioning boss 442. The bracket 44 is provided with an extension plate 447 extending away from the partition 13, and a receiving groove 9 is formed between the extension plate 447 and the bracket 44. The bracket spring 12 is located in the receiving groove 9, which limits the bracket spring 12 to prevent it from detaching and is easy to install. The partition 13 is provided with two mounting posts 132, and the release 3 is provided with at least two mounting holes 31. The two mounting posts 132 are passed through the corresponding mounting holes 31 to realize the installation of the release 3, so that the release structure is stable and the top rod 30 of the release can better drive the paddle to swing.

[0045] The lock spring 43 is set as a torsion spring, and the bracket 44 is provided with a positioning column 443 and a contact boss 444. The lock spring 43 is sleeved on the positioning column 443, and the lock 41 is provided with a positioning groove 411. The first side of the lock spring 43 is located in the positioning groove 411, and the second side is set to contact the contact boss 444. The lock 41 is provided with spaced protrusions 413, and the positioning groove 411 is formed between the two protrusions 413. The two elastic corners of the lock spring 43 are respectively contacted with the contact boss 444 and the positioning groove 411 on the bracket 44, so that the structure is stable and reset is convenient.

Claims

1. A leakage tripping mechanism of a leakage circuit breaker, comprising a circuit breaker housing (1), a handle (2), a tripper (3) arranged in the circuit breaker housing (1), and a tripping mechanism (4), wherein the tripping mechanism comprises a lock catch (41), a trip catch (42), and a lock catch spring (43), wherein the trip catch (42) is rotatably arranged in the circuit breaker housing (1), and the trip catch (42) and the handle (2) are linked by a connecting rod (8), the lock catch (41) is rotatably arranged, and the lock catch spring (43) acts on the lock catch (41), prompting one end of the lock catch (41) to form a conflicting fit with the trip catch (42) to realize a handle closing operation, characterized in that The tripping mechanism (4) further comprises a bracket (44), a paddle (45) and a lever (46); the tripping catch (42) is rotatably mounted on the bracket (44); the bracket (44) is rotatably mounted in the circuit breaker housing (1) via a first mounting shaft (5); the lock catch (41) is mounted on the first mounting shaft (5); the paddle (45) is rotatably mounted in the circuit breaker housing (1) via a second mounting shaft (6) and is located above the tripper (3); the paddle (45) is disposed in contact with a top rod (30) on the tripper (3); and the lever (46) is provided with a first arm (461) and a second arm (462); the first arm (461) is disposed in contact with an upper end surface of the paddle (45). The second arm (462) is provided with a long slot (4621), and the lock catch (41) and the second arm (462) are linked together by a pull rod (7). One end of the pull rod (7) is fixed on the lock catch (41), and the other end is slidably arranged in the long slot (4621). The tripper (3) pushes the paddle (45) to swing, driving the paddle (46) to swing, thereby driving the lock catch (41) to swing and achieve tripping. A paddle spring (11) for resetting the paddle (45) and a bracket spring (12) for resetting the bracket (44) are also provided in the circuit breaker housing (1). The paddle spring (11) is arranged on the paddle (45), and one end is arranged to contact or spaced from the bracket (44).

2. The leakage tripping mechanism of the leakage circuit breaker according to claim 1, characterized in that: The paddle spring (11) is arranged as a torsion spring. The paddle (45) is provided with a placement groove (451), a first contact surface (452) and a second contact surface (453). The paddle spring (11) is installed in the placement groove (451), and the first side (111) of the paddle spring (11) contacts the first contact surface (452), and the second side (112) contacts the second contact surface (453). The bracket (44) is provided with a boss (441). The first side (111) of the paddle spring (11) contacts the boss (441) or is spaced apart from the boss (441). When the product is closed, the first side (111) of the paddle spring (11) is spaced apart from the boss (441). When the product is disconnected, the first side (111) of the paddle spring (11) contacts the boss (441).

3. The leakage tripping mechanism of the leakage circuit breaker according to claim 1 or 2, characterized in that: A partition (13) is provided in the circuit breaker housing (1), the bracket (44) and the shift rod (46) are both rotatably arranged on the partition (13), the partition (13) is provided with a mounting groove (131), the bracket (44) is provided with a positioning boss (442), and the bracket spring (12) is arranged in the mounting groove (131), with one end abutting against the side wall of the mounting groove (131) and the other end sleeved on the positioning boss (442).

4. The leakage tripping mechanism of the leakage circuit breaker according to claim 1 or 2, characterized in that: The locking spring (43) is configured as a torsion spring. A positioning column (443) and a contact boss (444) are provided on the bracket (44). The locking spring (43) is sleeved on the positioning column (443). A positioning groove (411) is provided on the lock (41). The first side (111) of the locking spring (43) is located in the positioning groove (411), and the second side (112) is contacted on the contact boss (444).

5. The leakage tripping mechanism of the leakage circuit breaker according to claim 1 or 2, characterized in that: The pull rod (7) is arranged in a "U" shape, and a slot (412) is provided on the lock buckle (41). One end of the pull rod (7) is inserted into the slot (412), and the other end is movably arranged in the long groove (4621).

6. The leakage tripping mechanism of the leakage circuit breaker according to claim 1 or 2, characterized in that: The bracket (44) is provided with an arcuate groove (445) and a mounting boss (446), the jump buckle (42) is arranged on the mounting boss (446), and the connecting rod (8) passes through the jump buckle (42) and is slidably arranged in the arcuate groove (445).

7. The leakage tripping mechanism of the leakage circuit breaker according to claim 3, characterized in that: An extension plate (447) extending in a direction away from the partition (13) is provided on the bracket (44), a receiving groove (9) is formed between the extension plate (447) and the bracket (44), and the bracket spring (12) is located in the receiving groove (9).

8. The leakage tripping mechanism of the leakage circuit breaker according to claim 7, characterized in that: Two mounting columns (132) are provided on the partition (13), and at least two mounting holes (31) are provided on the release (3). The two mounting columns (132) are inserted into the corresponding mounting holes (31) to realize the installation of the release (3).

9. The leakage tripping mechanism of the leakage circuit breaker according to claim 1 or 2, characterized in that: The circuit breaker housing (1) comprises a base (15), a middle base (16) and an upper cover which are separately arranged; the tripping mechanism (4) and the tripper (3) are located between the base (15) and the middle base (16); an installation space (151) for installing a magnetic ring is provided on one side of the tripping mechanism (4) on the base (15); and a through hole (161) is provided on the middle base (16) at a position corresponding to the magnetic ring.

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