Multi-pole linkage mechanism suitable for hydraulic electromagnetic circuit breaker

Abstract

The utility model discloses a multi-pole linkage mechanism suitable for a hydraulic electromagnetic circuit breaker. The multi-pole linkage mechanism comprises a shell, a handle, a movable feeler lever, a tripping structure and a linkage structure, the handle and the movable feeler lever are both rotationally installed on the shell and connected through a tripping structure, the circuit breaker is powered on when the handle is located at the switching-on position, and the circuit breaker is powered off when the handle is located at the switching-off position; the linkage structure comprises a trigger rod, a synchronous piece and a reset piece used for driving the synchronous piece to reset, the trigger rod is movably installed in the shell, the synchronous piece is rotatably installed in the shell, one end of the trigger rod is connected with the synchronous piece, and the other end of the trigger rod can abut against the tripping structure; the synchronizing pieces of the two circuit breakers can be in transmission connection through a transmission piece; when the tripping structure is unlocked, the triggering rod can be pushed to move, so that the synchronous piece rotates; when the trigger rod moves, the tripping structure can be driven to unlock, so that the circuit breaker is powered off. The structure is simpler, the number of required components is smaller, the overall structure of the circuit breaker is thinner, and the breaking action of the circuit breaker is sensitive.

Description

Technical Field

[0001] The utility model relates to the field of electrical protection equipment, in particular to a multi-pole linkage mechanism applicable to a hydraulic electromagnetic circuit breaker. Background Art

[0002] In the existing multi-pole linkage mode of a hydraulic electromagnetic circuit breaker, generally, a multi-pole trigger rod is sleeved on a frame, and the unlocking of a tripping mechanism inside a certain pole circuit breaker is utilized to push the action of the multi-pole trigger rod, so as to realize the synchronous tripping of a multi-pole product. Generally, the hydraulic electromagnetic circuit breakers adopting a four-bar linkage mechanism inside all adopt this multi-pole linkage mode, and well-known domestic and foreign brands such as the NDB3-50 series of Liangxin and the 6700 series of AIRPAX are all using it.

[0003] The prior art with the publication number of CN201655705U discloses a handle operating structure of a bipolar hydraulic electromagnetic circuit breaker. A handle operating structure of a bipolar hydraulic electromagnetic circuit breaker includes a handle a and a handle b which are fixedly connected, and a link a and a link b which are fixedly connected; the handle a is hinged to a circuit breaker support a and a tripping mechanism a, the tripping mechanism a is hinged to a moving contact bracket a through a rivet a, and a latch a is arranged on the tripping mechanism a; the link a is hinged to the circuit breaker support a. The structures of the handle b and the link b are the same as those of the handle a and the link a. When a certain pole circuit breaker trips, the tripping mechanism of this pole resets, the rivet on the tripping mechanism pushes the link of this pole, so that the two links move simultaneously, and the other link pushes the corresponding latch, and the latch drives its tripping mechanism to reset, so as to promote the tripping of the other pole.

[0004] In the prior art, the circuit breaker adopts a multi-link structure, and when a fault current occurs in one circuit breaker, the other circuit breaker simultaneously performs a tripping short-circuit action; this makes the structure of the circuit breaker linkage relatively complex, the transmission path complex and the volume large and other disadvantages. Summary of the Utility Model

[0005] In order to solve the problem of the complex structure of the multi-pole linkage of a multi-pole circuit breaker in the prior art, the purpose of the utility model is to provide a multi-pole linkage mechanism applicable to a hydraulic electromagnetic circuit breaker, the linkage structure is simpler, the volume is smaller and the action is more sensitive.

[0006] In order to achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a multi-pole linkage mechanism suitable for a hydraulic electromagnetic circuit breaker, comprising a housing, a handle, a moving contact rod, a tripping structure and a linkage structure; the handle and the moving contact rod are both rotatably mounted on the housing, the handle and the moving contact rod are connected by a tripping structure, the position of the handle includes a closing position and an opening position, the circuit breaker is energized when the handle is in the closing position, and the circuit breaker is de-energized when the handle is in the opening position; the linkage structure comprises a trigger rod, a synchronizing member and a reset member for driving the synchronizing member to reset, the trigger rod is movably mounted in the housing, the synchronizing member is rotatably mounted in the housing, one end of the trigger rod is connected to the synchronizing member, and the other end of the trigger rod can be abutted against the tripping structure; the synchronizing members of the two circuit breakers can be connected by a transmission member; when the tripping structure is unlocked, it can push the trigger rod to move, causing the synchronizing member to rotate; when the trigger rod moves, it can drive the tripping structure to unlock, causing the circuit breaker to de-energize.

[0007] Preferably, the handles of the two circuit breakers are fixedly connected.

[0008] Preferably, a second hole is provided on the synchronizer, and a first column is protruding on the inner wall of the shell cavity. The first column is inserted into the second hole, so that the synchronizer is rotatably installed on the shell; a non-circular transmission hole is provided in the second hole, and the end of the transmission member matches the transmission hole. A through hole is provided on the first column, and the transmission member passes through the through hole of the shell and is plugged into the transmission hole.

[0009] Preferably, a second connecting arm is protruded from the synchronizer, a third hole is provided on the second connecting arm, one end of the trigger rod is bent to form a second connecting portion, and the second connecting portion is inserted into the third hole.

[0010] Preferably, the reset member includes a second torsion spring, a second column protrudes on the inner wall of the shell cavity, the second torsion spring is sleeved on the second column, and a hook-shaped first connecting portion is provided on the synchronizer, the first connecting portion hooks one leg of the second torsion spring, and the other leg of the second torsion spring is against the shell.

[0011] Preferably, a recessed avoidance groove is provided on the inner wall of the cavity of the shell 11, and the main body of the trigger rod is located in the avoidance groove. After the two ends of the trigger rod extend from the avoidance groove, they can respectively drive the tripping structure and the synchronization member.

[0012] Preferably, the tripping structure includes a buckle, a linkage and a lock; the handle is hinged to the buckle, the buckle is rotatably connected to the handle, the buckle is rotatably connected to the linkage, the linkage is hinged to the moving contact rod, the lock is rotatably installed on the linkage, and the lock can be engaged with the buckle; after the lock rotates, the lock is disengaged from the buckle.

[0013] Preferably, a notch is provided on the lock buckle and a stepped portion is provided on the buckle piece; when the release structure is locked, part of the buckle piece extends into the notch, and the stepped portion of the buckle piece buckles the side of the notch, so that the lock buckle and the buckle piece are fixedly connected; after the lock buckle is rotated, the lock buckle and the buckle piece are unlocked.

[0014] Preferably, one end of the latch has a third connecting arm protruding therefrom, and a driving arm protrudes from the third connecting arm. By touching the driving arm, the latch can be unlocked from the buckle piece.

[0015] The beneficial effects of the technical solution of the present utility model are as follows: The above structure realizes the linkage of the multi-pole circuit breaker only through four simple-structured components, making the overall structure of the circuit breaker more compact and thinner; and through the structural form of the trigger rod, the opening action of the circuit breaker is sensitive; the above linkage structure is independently arranged and can be self-reset, enabling the circuit breaker to be normally closed again. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the connection structure of two circuit breakers;

[0017] Figure 2 It is a schematic diagram of the connection structure of two circuit breakers after removing the housing;

[0018] Figure 3 It is a schematic diagram of the structure of the circuit breaker after removing the cover plate;

[0019] Figure 4 It is a schematic diagram of the connection structure of the bracket, armature, handle, trip assembly and linkage assembly;

[0020] Figure 5 It is a schematic diagram of the connection structure of the armature, handle, trip assembly and linkage assembly;

[0021] Figure 6 It is a schematic diagram of the connection structure of the handle, trip assembly and linkage assembly;

[0022] Figure 7 It is a schematic diagram of the connection structure of the trip assembly and the linkage assembly;

[0023] Figure 8 It is a schematic diagram of the connection structure of the buckle piece and the linkage member;

[0024] Figure 9 It is a schematic diagram of the structure of the buckle piece;

[0025] Figure 10 It is a schematic diagram of the structure of the latch;

[0026] Figure 11 It is a schematic diagram of the structure of the trigger rod;

[0027] Figure 12 It is a schematic diagram of the structure of the synchronizer;

[0028] Figure 13 It is a schematic diagram of the structure of the housing.

[0029] Reference numerals: 11, housing; 111, first column; 112, second column; 113, avoidance groove; 114, third column; 12, cover plate; 13, handle; 131, first connecting arm; 14, first shaft; 15, moving contact rod; 151, waist-shaped groove; 16, limiting shaft; 17, fifth shaft;

[0030] 2. Electromagnetic coil; 21, bracket; 22, armature; 221, driving part; 23, second shaft; 24, first torsion spring;

[0031] 3. Tripping structure; 31, buckle piece; 32, fourth shaft; 33, protective cover; 34, linkage member; 35, lock; 351, third connecting arm; 352, driving arm; 353, notch; 36, third shaft;

[0032] 4. Linkage structure; 41, synchronizing member; 411, second connecting arm; 412, third hole; 413, first connecting portion; 414, transmission hole; 42, trigger rod; 421, second connecting portion; 422, hook pulling portion; 43, reset member;

[0033] 5. Transmission member. Detailed implementation manners

[0034] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

[0037] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature. Embodiment

[0039] As Figures 1 to 13 A multi-pole linkage mechanism applicable to a hydraulic electromagnetic circuit breaker shown as follows includes a housing, a handle 13, a moving contact rod 15, a tripping structure 3, and a linkage structure 4; the handle 13 and the moving contact rod 15 are both rotatably installed on the housing, the handle 13 and the moving contact rod 15 are connected by the tripping structure 3, the positions of the handle 13 include a closing position and a tripping position, when the handle 13 is in the closing position, the circuit breaker is powered on, and when the handle 13 is in the tripping position, the circuit breaker is powered off;

[0040] The linkage structure 4 includes a trigger rod 42, a synchronizer 41, and a reset member 43 for driving the synchronizer 41 to reset. The trigger rod 42 is movably installed inside the housing, the synchronizer 41 is rotatably installed inside the housing, one end of the trigger rod 42 is connected to the synchronizer 41, and the other end of the trigger rod 42 can abut against the tripping structure 3; the synchronizers 41 of two circuit breakers can be drivingly connected through a transmission member 5; when the tripping structure 3 is unlocked, it can push the trigger rod 42 to move, causing the synchronizer 41 to rotate; when the trigger rod 42 moves, it can drive the tripping structure 3 to unlock, causing the circuit breaker to power off.

[0041] With such a setting, the above structure realizes the linkage of a multi-pole circuit breaker only through four components with simple structures, the overall structure of the circuit breaker is more compact and thinner; and through the structural form of the trigger rod 42, the breaking action of the circuit breaker is made sensitive; the above linkage structure 4 is independently arranged and can be self-reset, enabling the circuit breaker to be closed again normally.

[0042] In this embodiment, as Figures 2 to 4 shown, the bracket 21 is fixed inside the housing. The handle 13, the moving contact rod 15 and the armature 22 are all rotatably mounted on the bracket 21. An oil cup is also mounted on the bracket 21, and an electromagnetic coil 2 is wound around the oil cup. The armature 22 is hinged to the bracket 21. When a faulty circuit passes through the electromagnetic coil 2, the magnetic force of the oil cup becomes larger and attracts the armature 22 to rotate. When the armature 22 rotates, it can drive the tripping structure 3 to unlock.

[0043] Further preferably, the handle 13 is hinged to the bracket 21 through a first shaft 14, the armature 22 is hinged to the bracket 21 through a second shaft 23, a first torsion spring 24 is sleeved on the second shaft 23, and the two legs of the first torsion spring 24 are respectively abutted against the armature 22 and the bracket 21. After the circuit breaker is powered off, the magnetic force of the oil cup disappears, and the first torsion spring 24 can drive the armature 22 to reset. A third torsion spring for driving the handle 13 to reset is arranged between the handle 13 and the housing.

[0044] In this embodiment, as Figure 1 、 Figure 2 、 Figure 3 and Figure 6 shown, the housing includes a housing body 11 and a cover plate 12. The housing body 11 and the cover plate 12 are fixedly connected. A cavity is formed by recessing on the housing body 11. A first connecting arm 131 protrudes from the handle 13, and the first connecting arm 131 extends out of the inner cavity of the housing body 11. Further, among two interlocked circuit breakers, the handles 13 of the two circuit breakers are fixedly connected. Specifically, a first hole is formed in the first connecting arm 131 of the handle 13, and a connecting shaft can be inserted into the first hole. The handles 13 of the two circuit breakers are connected by a connecting shaft. With such a setting, when manually adjusting the circuit breaker, the two circuit breakers can move synchronously.

[0045] In this embodiment, as Figure 12 shown, a second hole is formed in the synchronizing member 41. As Figure 13 shown, a first post 111 protrudes from the inner wall of the cavity of the housing body 11. As Figure 3 shown, the first post 111 is inserted into the second hole, so that the synchronizing member 41 is rotatably mounted on the housing. A non-circular transmission hole 414 is arranged in the second hole. The end of the transmission member 5 is matched with the transmission hole 414. A through hole is formed in the first post 111, and the transmission member 5 passes through the through hole of the housing and is inserted into the transmission hole 414. With such a setting, the connection structure between the two interlocked circuit breakers is more compact, and the assembly and positioning of the two circuit breakers are simpler and more convenient.

[0046] In this embodiment, as Figure 12 shown, a second connecting arm 411 protrudes from the synchronizing member 41, and a third hole 412 is formed in the second connecting arm 411. As Figure 11 shown, one end of the trigger rod 42 is bent to form a second connecting portion 421. As Figures 5 to 7As shown, the second connecting portion 421 is inserted into the third hole 412, so that the trigger lever 42 is linked with the synchronizing member 41.

[0047] In this embodiment, the reset member 43 includes a second torsion spring. As Figure 13 shown, a second post 112 protrudes from the inner wall of the cavity of the housing 11. As Figure 3 shown, the second torsion spring is sleeved on the second post 112. As Figures 2 to 7 shown, the end of the second connecting arm 411 is a hook-shaped first connecting portion 413. The first connecting portion 413 hooks one leg of the second torsion spring, and the other leg of the second torsion spring abuts against the housing 11.

[0048] In this embodiment, as Figure 3 and Figure 13 shown, a recessed avoidance groove 113 is provided on the inner wall of the cavity of the housing 11. The avoidance groove 113 is located on the side of the bracket 21. The trigger lever 42 is located in the avoidance groove 113. The second connecting portion 421 of the trigger lever 42 extends out of the avoidance groove 113 and is connected to the synchronizing member 41. With such a setting, the circuit breaker can be made thinner. Further preferably, a third post 114 protrudes in the avoidance groove 113. The trigger lever 42 can pass through between the third post 114 and the side wall of the avoidance groove 113, and the third post 114 and the inner wall of the avoidance groove 113 limit the movement range of the trigger lever 42. Further preferably, part of the tripping mechanism extends into the avoidance groove 113.

[0049] In this embodiment, as Figures 2 to 7 shown, when the tripping structure 3 is in the locked state, neither manual closing nor manual tripping will change the state of the tripping structure 3, and the tripping structure 3 does not contact the trigger lever 42; when the tripping structure 3 becomes unlocked, the tripping structure 3 pushes the trigger lever 42 to move. Among them, the specific structure of the tripping structure can refer to the patent documents with publication numbers CN115020160A and CN110211850A.

[0050] Specifically, the tripping structure 3 includes a buckle piece, a linkage member 34 and a lock. The buckle piece 31 is rotatably connected to the handle 13 through a third shaft 36, the buckle piece 31 is rotatably connected to the linkage member 34 through a fourth shaft 32, the linkage member 34 is hinged to the moving contact rod 15 through a fifth shaft 17, the lock 35 is rotatably installed on the linkage member 34, and the lock 35 can be snap-connected to the buckle piece 31; both the armature 22 and the trigger rod 42 can drive the lock 35 to rotate to unlock the tripping structure 3; after the tripping structure 3 is unlocked, the linkage member 34 can rotate relative to the buckle piece 31, the linkage member 34 drives the lock 35 to move, the linkage member 34 drives the trigger rod 42 to move through the lock 35, the trigger rod 42 drives the synchronizing member 41 to rotate, and the synchronizing member 41 drives another circuit breaker to act through the transmission member 5. With such a setting, it can be ensured that when manually adjusting the state of the circuit breaker, the tripping structure 3 remains in the locked state when the user manually turns the handle 13, and the linkage structure 4 will not be triggered, thereby ensuring the overall stability of the circuit breaker and making the circuit breaker more reliable.

[0051] In this embodiment, a limiting shaft 16 is installed in the housing 11, and a kidney-shaped groove 151 is formed in the moving contact rod 15, and the limiting shaft 16 passes through the kidney-shaped groove, so as to limit the movement path of the moving contact rod 15.

[0052] In this embodiment, as Figure 10 shown, a notch 353 is provided on the lock 35, as Figure 9 shown, a stepped portion 311 is provided on the buckle piece 31; as Figure 7 and Figure 8 shown, when the tripping structure 3 is locked, a part of the buckle piece 31 extends into the notch 353, and the stepped portion 311 of the buckle piece 31 buckles the side of the notch 353, so that the lock 35 and the buckle piece 31 are fixedly connected; the stepped portion 311 on the buckle piece 31 and the notch 353 on the lock 35 can form two placement states. One is: when in the locked state, the stepped portion 311 abuts against the end of the notch 353 to keep the buckle piece 31 and the lock 35 connected; the other is: when in the unlocked state, the lock 35 rotates so that the end of the notch 353 disengages from the stepped portion 311 and provides a passing space for the stepped portion 311.

[0053] In this embodiment, as Figure 10 shown, a third connecting arm 351 protrudes from one end of the lock 35, a driving arm 352 protrudes from the third connecting arm 351, a driving portion 221 protrudes from the armature 22, and the end of the trigger rod 42 is bent upward to form a hooking portion 422. The driving portion 221 of the armature 22 and the trigger rod 42 drive the lock 35 to rotate by pushing against the driving arm 352 of the lock 35.

[0054] In this embodiment, as Figure 7 and Figure 8As shown, the linkage member 34 is bent to form a groove, the buckle piece 31 and the moving contact rod 15 are both inserted into the groove, and the notch 353 on the lock 35 is located in the groove. With such a setting, the tripping mechanism can be effectively protected and positioned.

[0055] In this embodiment, as Figure 5 and Figure 7 shown, the tripping structure 3 includes a protective cover which is fixed on the buckle piece 31. The buckle piece 31 is located inside the protective cover 33. Two symmetrically arranged inclined baffles are provided on the protective cover 33. On one side of the buckle piece 31 facing the inclined baffle, a beveled surface 31 of the buckle piece is formed. The beveled surface 31 of the buckle piece is placed between the two inclined baffles and abuts against the inclined baffle. By means of the arranged inclined baffle cooperating with the beveled surface 31 of the buckle piece, further limiting of the buckle piece 31 is realized. At the same time, when the buckle piece 31 trips, there will be no random reset phenomenon. That is to say, after the buckle piece 31 trips, the tripped state can be maintained, which is convenient for maintenance personnel to check. Exemplarily, in a specific embodiment, the inclined baffle is an elastic plate, so that when the buckle piece 31 rotates, the inclined baffle can undergo elastic deformation to make way when the buckle piece 31 moves relative to the protective cover 33.

[0056] Further preferably, protective cover protrusions 33 are formed at the opposite side ends of the two inclined baffles. The protective cover protrusions 33 abut against the ends of the beveled surface 31 of the buckle piece to further limit the inclined baffle and prevent the buckle piece 31 from tripping during the opening and closing process of the circuit breaker. Exemplarily, in a specific embodiment, the protective cover protrusion 33 is arranged in a hemispherical structure, so that when the beveled surface 31 of the buckle piece protrudes, an inclined extrusion force can be formed between the beveled surface 31 of the buckle piece and the protective cover protrusion 33, which is convenient for pushing the inclined baffle away.

[0057] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and purposes of the present invention.

Claims

1. A multi-pole linkage mechanism applicable to a hydraulic electromagnetic circuit breaker, characterized in that: The circuit breaker comprises a housing, a handle (13), a movable contact rod (15), a tripping structure (3) and a linkage structure (4); the handle (13) and the movable contact rod (15) are both rotatably mounted on the housing, the handle (13) and the movable contact rod (15) are connected via the tripping structure (3), the position of the handle (13) comprises a closing position and an opening position, the circuit breaker is energized when the handle (13) is in the closing position, and the circuit breaker is de-energized when the handle (13) is in the opening position; The linkage structure (4) includes a trigger rod (42), a synchronous member (41), and a reset member (43) for driving the synchronous member (41) to reset. The trigger rod (42) is movably mounted in the housing, and the synchronous member (41) is rotatably mounted in the housing. One end of the trigger rod (42) is connected to the synchronous member (41), and the other end of the trigger rod (42) can abut against the tripping structure (3). The synchronizing members (41) of the two circuit breakers can be connected by transmission via a transmission member (5); when the tripping structure (3) is unlocked, the triggering rod (42) can be pushed to move, causing the synchronizing member (41) to rotate; when the triggering rod (42) moves, the tripping structure (3) can be driven to unlock, causing the circuit breaker to be powered off.

2. The multi-pole linkage mechanism applicable to a hydraulic electromagnetic circuit breaker according to claim 1, wherein: The handles (13) of the two circuit breakers are fixedly connected.

3. The multi-pole linkage mechanism applicable to a hydraulic electromagnetic circuit breaker according to claim 1, wherein: A second hole is provided on the synchronizer (41), and a first column (111) is protruded on the inner wall of the housing cavity. The first column (111) is inserted into the second hole, so that the synchronizer (41) is rotatably mounted on the housing. A non-circular transmission hole (414) is provided in the second hole, and the end of the transmission member (5) matches the transmission hole (414). A through hole is provided on the first column (111), and the transmission member (5) passes through the through hole of the housing and is plugged into the transmission hole (414).

4. A multi-pole linkage mechanism applicable to a hydraulic electromagnetic circuit breaker according to claim 1, characterized in that: A second connecting arm (411) is protruded from the synchronizer (41), a third hole (412) is provided on the second connecting arm (411), one end of the trigger rod (42) is bent to form a second connecting portion (421), and the second connecting portion (421) is inserted into the third hole (412).

5. A multi-pole linkage mechanism applicable to a hydraulic electromagnetic circuit breaker according to claim 1, characterized in that: The reset member (43) includes a second torsion spring, a second column (112) protrudes from the inner wall of the shell cavity, the second torsion spring is sleeved on the second column (112), and a hook-shaped first connecting portion (413) is provided on the synchronization member (41), the first connecting portion (413) hooks one leg of the second torsion spring, and the other leg of the second torsion spring is against the shell.

6. The multi-pole linkage mechanism applicable to a hydraulic electromagnetic circuit breaker according to claim 1, characterized in that: The inner wall of the housing 11 cavity is provided with a recessed avoidance groove (113), the main body of the trigger rod (42) is located in the avoidance groove (113), and the two ends of the trigger rod (42) are respectively capable of driving the tripping structure (3) and the synchronizing member (41) after extending from the avoidance groove (113).

7. A multi-pole linkage mechanism applicable to a hydraulic electromagnetic circuit breaker according to claim 1, characterized in that: The tripping structure (3) includes a buckle (31), a linkage member (34) and a lock (35); the handle (13) is hinged to the buckle (31), the buckle (31) is rotatably connected to the handle (13), the buckle (31) is rotatably connected to the linkage member (34), the linkage member (34) is hinged to the moving contact rod (15), the lock (35) is rotatably mounted on the linkage member (34), and the lock (35) can be engaged with the buckle (31); After the lock buckle (35) is rotated, the lock buckle (35) is separated from the buckle plate (31).

8. A multi-pole linkage mechanism applicable to a hydraulic electromagnetic circuit breaker according to claim 7, characterized in that: The latch (35) is provided with a notch (353), and the buckle piece (31) is provided with a stepped portion (311). When the release structure (3) is locked, a part of the buckle piece (31) extends into the notch (353), and the stepped portion (311) of the buckle piece (31) buckles the side of the notch (353), so that the latch (35) and the buckle piece (31) are fixedly connected; after the latch (35) rotates, the latch (35) and the buckle piece (31) are unlocked.

9. A multi-pole linkage mechanism applicable to a hydraulic electromagnetic circuit breaker according to claim 7, characterized in that: One end of the latch (35) protrudes with a third connecting arm (351), and the third connecting arm (351) protrudes with a driving arm (352). By touching the driving arm (352), the latch (35) can be driven to unlock from the buckle piece (31).

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