CN217333964U

CN217333964U - Circuit breaker

Info

Publication number: CN217333964U
Application number: CN202123024429.9U
Authority: CN
Inventors: 单小龙; 葛伟骏; 潘友义
Original assignee: Shanghai Chint Intelligent Technology Co Ltd
Current assignee: Shanghai Chint Intelligent Technology Co Ltd
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-08-30
Anticipated expiration: 2031-12-02

Abstract

A circuit breaker comprises a shell, a handle, a first connecting rod, a jump buckle, a lock catch, a second connecting rod, a lever, a moving contact and a static contact, wherein the jump buckle and the lock catch are respectively pivotally mounted on the shell, and the jump buckle is provided with a sliding groove and a jump buckle buckling part which is used for being in hasp fit with a buckle platform of the lock catch; the handle is pivotally arranged on the shell, one end of the first connecting rod is connected with the handle, the other end of the first connecting rod is hinged with one end of the second connecting rod, the other end of the second connecting rod is connected with the lever, and the hinged ends of the first connecting rod and the second connecting rod are in sliding fit with the chute of the jump buckle; the lever is pivotally installed on the shell, one end of the moving contact is installed on the lever, and the other end of the moving contact is arranged corresponding to the fixed contact. The invention provides a breaker with compact structure and high operation reliability.

Description

Circuit breaker

Technical Field

The invention relates to the technical field of low-voltage electric appliances, in particular to a circuit breaker.

Background

With the development of economy, miniaturization and intellectualization have become the development trend of low-voltage electrical components, and electrical products are expected to have multiple functions in the smallest possible volume so as to be applied to different occasions. The operating mechanism is the most basic functional module in the electric appliance product, occupies a larger space proportion in the structural layout of the whole electric appliance product, and the miniaturization and the compactness of the operating mechanism are the main directions for realizing the miniaturization and the intellectualization of the electric appliance product. The existing circuit breaker products mostly adopt four-bar operating mechanisms, the components are distributed dispersedly, the limited space is divided into fragments, the effective utilization can not be obtained, and the multifunctional development of the products is limited.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a circuit breaker which is compact and small in structure and high in operation reliability.

In order to achieve the purpose, the invention adopts the following technical scheme:

a circuit breaker comprises a shell, a handle, a first connecting rod, a jump buckle, a lock catch, a second connecting rod, a lever, a moving contact and a fixed contact, wherein the jump buckle and the lock catch are respectively and pivotally installed on the shell, and the jump buckle is provided with a chute and a jump buckle buckling part which is used for being in hasp fit with a buckle table of the lock catch; the handle is pivotally arranged on the shell, one end of the first connecting rod is connected with the handle, the other end of the first connecting rod is hinged with one end of the second connecting rod, the other end of the second connecting rod is connected with the lever, and the hinged ends of the first connecting rod and the second connecting rod are in sliding fit with the chute of the jump buckle; the lever is pivotally mounted on the shell, one end of the moving contact is mounted on the lever, and the other end of the moving contact is arranged corresponding to the fixed contact.

Preferably, the handle rotates the installation through first pivot, the hasp rotates the installation through the third pivot, jump knot one end and rotate the installation through the second pivot, the hasp edge and the hasp meshing cooperation of the other end, first pivot, third pivot and second pivot are located an obtuse triangle's three summit department, wherein first pivot is located this obtuse triangle's obtuse vertex department.

Preferably, jump and detain one end and rotate the installation, the other end is equipped with and detains hasp portion of hasp snap-fit jump, the spout sets up between the rotation axis of jumping the knot and the hasp portion of jumping the knot, hasp one end is rotated the installation, and the other end is equipped with the dropout drive division that is used for triggering the dropout, and the hasp be equipped with jump detain hasp portion sliding fit's of jumping the knot glide plane, be equipped with on the glide plane with jump detain hasp portion snap-fit's bellied hasp platform.

Preferably, the hasp and the lever are arranged in the same rotating shaft, the lever is rotatably sleeved on a third rotating shaft of the shell through a third shaft hole on the lever, a lever elastic part for resetting the lever is arranged between the lever and the shell, the hasp is rotatably sleeved on the third rotating shaft of the shell through a fourth shaft hole on the hasp, and a hasp elastic part for resetting the hasp is arranged between the hasp and the shell.

Preferably, when the circuit breaker is in a closed state, the pressure of the hinged end of the first link and the hinged end of the second link on the chute of the jump buckle is F1, the moment arm is L1, the positive pressure of the buckled buckle table of the jump buckle part of the jump buckle is F2, the moment arm is L2, and the length ratio of the moment arm L1 to the moment arm L2 is less than 1/4.

Preferably, jump and detain rotation portion, chute section and jump knot hasp arm including consecutive jump knot, jump detain rotation portion and be equipped with the second shaft hole, the chute section is equipped with the spout, the tip corner of jump knot hasp arm is equipped with bellied hasp and colludes, the terminal surface of jump knot hasp arm is equipped with bellied and hasp sliding fit's slip arc, the slip arc with hasp meet the department be can with the hasp edge of the hasp platform lock of hasp.

Preferably, a connecting line from the rotation axis of the jump buckle to the sliding arc surface through the center O of the sliding arc surface is L3, a connecting line from the rotation axis of the jump buckle to the buckle edge is L4, an angle α is formed between the connecting line L3 and the connecting line L4, the angle α is an acute angle, and the length of the connecting line L3 is greater than that of the connecting line L4.

Preferably, one end of the lock catch is provided with a fourth shaft hole, and the bottom surface of the other end of the lock catch is provided with a downward convex tripping driving part; be equipped with downward convex hasp convex part on the bottom surface that the middle part of hasp is close to fourth shaft hole position, the groove of dodging the second connecting rod is formed between hasp convex part and the dropout drive division, be equipped with on the hasp convex part to the convex direction arch of side as with jump knot complex glide plane, be equipped with on the side of hasp convex part with jump knot hasp complex hasp platform, the direction arch sets up with the bottom surface interval of hasp.

Preferably, a downward-protruding linkage shaft is arranged on the bottom surface of the lock catch, and a linkage groove is arranged on the top surface of the lock catch at a position corresponding to the linkage shaft.

Preferably, the second connecting rod includes two connecting rod pieces and connects the splice bar between two connecting rod pieces, the joint clearance has between two connecting rod pieces for dodge jump knot and or hasp, the one end of two connecting rod pieces is aimed at and is equipped with and is used for with first connecting rod articulated second hinge hole, the other end of two connecting rod pieces is aimed at and is equipped with and is used for with lever articulated third hinge hole.

Preferably, the movable contact is pivotally mounted on a lever, and the movable contact is rotatably connected to the lever; and a third torsion spring is arranged at the joint of the moving contact and the lever, one leg of the third torsion spring is abutted against the lever, and the other leg of the third torsion spring is abutted against the moving contact.

Preferably, the moving contact is provided with a stopping protrusion, and the lever is provided with a stopping boss corresponding to the stopping protrusion.

Preferably, the lever comprises a lever plate and a support boss arranged on the lever plate, and a fourth rotating shaft for pivotally mounting the moving contact is arranged on the support boss; one corner of the lever plate extends outwards to form an extending part, one side of the extending part, which is connected with the lever plate, is provided with a limiting inclined plane for matching with a limiting cylinder of the shell, and the other side of the extending part is provided with a fourth hinge hole for being hinged with the second connecting rod; the end of the extension part is provided with a third shaft hole for the pivotal installation of the lever.

Preferably, the first connecting rod is a U-shaped rod, one end of the U-shaped rod is hinged to the first hinge hole of the handle, and the other end of the U-shaped rod is hinged to the second hinge hole of the second connecting rod and inserted into the sliding groove of the jump buckle.

The circuit breaker has the advantages of compact and small structure, centralized occupied space and small proportion, the operating mechanism fully utilizes the internal limited space, more functional modules can be integrated in the internal limited space of the product, and more using functions of the product are realized.

Drawings

Fig. 1 is a perspective view of the inventive circuit breaker in an open state;

fig. 2 is a front view of the inventive circuit breaker in an open state;

fig. 3 is a partial structural anatomy view of the trip catch being separated from the latch when the circuit breaker contact is in the open position in accordance with the present invention;

fig. 4 is a perspective view of the inventive circuit breaker in a closed state;

fig. 5 is a front view of the inventive circuit breaker in a closed state;

fig. 6 is a partial structural anatomy view of the snap and latch snap in the circuit breaker contact closed position of the present invention;

fig. 7 is a partial structural schematic diagram of the state one of the inventive circuit breaker in tripping process;

fig. 8 is a partial structural view of the state two of the circuit breaker in the tripping process of the invention;

fig. 9 is a partial structural anatomy diagram of the state three of the inventive circuit breaker in the tripping process;

fig. 10 is a perspective view of the circuit breaker of the present invention in a trip process state three;

FIG. 11 is a schematic view of the base structure of the inventive housing;

FIG. 12 is a schematic view of the structure of the inventive handle;

fig. 13 is a perspective view of the inventive jump buckle;

fig. 14 is a front view of the inventive jump buckle;

FIG. 15 is a front perspective view of the inventive latch of the present invention;

FIG. 16 is a reverse perspective view of the inventive latch of the present invention;

FIG. 17 is a perspective view of the inventive connecting rod of the present invention;

FIG. 18 is a perspective view of the inventive lever;

fig. 19 is a schematic structural diagram of the moving contact of the invention.

Detailed Description

The following describes the circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 19. The circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1 to 10, the circuit breaker of the present invention includes a housing 1, an operating mechanism, a movable contact 8, a fixed contact 9 and a release 101. Operating device includes handle 2, first connecting rod 3, jump and detains 4, hasp 5, second connecting rod 7 and lever 6, jump and detain 4 and hasp 5 pivot respectively and install on the base bottom plate of casing 1, hasp 5 is equipped with the dropout drive division 56 that corresponds with release 101, jump and detain 4 be equipped with spout 42 and be used for with the jump buckle hasp portion of hasp platform 53 lock of hasp 5, in this embodiment jump buckle hasp portion is for being used for with hasp platform 53 lock's of hasp 5 hasp edge 43. The handle 2 is pivotally mounted on a base bottom plate of the shell 1, one end of the first connecting rod 3 is connected with the handle 2, the other end of the first connecting rod 3 is hinged with one end of the second connecting rod 7, the other end of the second connecting rod 7 is connected with the lever 6, and the hinged ends of the first connecting rod 3 and the second connecting rod 7 are inserted into a sliding groove 42 of the jump buckle 4 and are in sliding fit along the sliding groove 42; the lever 6 is pivotally mounted on the housing 1, one end of the movable contact 8 is mounted on the lever 6, and the other end of the movable contact 8 is arranged corresponding to the fixed contact 9. The circuit breaker is a cam-five-link mechanism which is composed of a jump buckle 4 with a chute 42, a shell 1, a handle 2, a first link 3, a second link 7 and a lever 6. The five-link mechanism formed by the shell 1, the handle 2, the first connecting rod 3, the second connecting rod 7 and the lever 6 has two degrees of freedom, and one end of the first connecting rod 3 and the hinged end of the second connecting rod 7 are limited to move on a cam formed by the fixed sliding groove 42, so that one degree of freedom is limited, and the cam-five-link transmission mechanism with one degree of freedom is formed. The tripping mechanism and the transmission mechanism which are composed of the jump buckle and the lock catch are basically separated and independent mechanisms, so that the tripping mechanism is basically in a static state when the operating mechanism is normally closed and opened, and the operation reliability of the whole mechanism is greatly improved.

Preferably, the handle 2 of this embodiment is installed through first pivot 12 rotation, hasp 5 is installed through third pivot 14 rotation, jump 4 one end is installed through second pivot 11 rotation, and the hasp edge 43 and the hasp 5 snap-fit of the other end, first pivot 12, third pivot 14 and second pivot 11 are located the three summit of an obtuse triangle, wherein first pivot 12 is located the obtuse vertex department of this obtuse triangle. The lever 6 is rotatably mounted through a third rotating shaft 14, a movable quadrangle is formed by taking the hinged end of the lever 6 and the second connecting rod 7 as a movable vertex and taking the first rotating shaft 12, the second rotating shaft 11 and the third rotating shaft 14 as fixed vertices, wherein the first rotating shaft 12 and the third rotating shaft 14 are positioned at two obtuse vertex points on a common side of the movable quadrangle, and the hinged end of the lever 6 and the second connecting rod 7 and the second rotating shaft 11 are positioned at two acute vertex points on the common side of the movable quadrangle. It should be noted that the obtuse angle feature, the acute angle feature, the triangle, and the order of the vertices of the triangle in this embodiment are only one embodiment, and cannot represent all other embodiments, and the maximum protection scope of this disclosure is not limited. The obtuse triangle and the parallelogram are not actually connected, but are assumed to be shapes for convenience of description of relative positions between the handle 2, the jump button 4, the locker 5, the lever 6, and the second link 7. Specifically, as shown in fig. 1-10, one end of the jump buckle 4 is rotatably installed below one side of the handle 2 and located between the handle 2 and the release 101, the latch 5 and the lever 6 are rotatably installed on the other side of the handle 2, the other end of the jump buckle 4 extends from below the handle 2 to the other side of the handle 2 in a substantially horizontal manner to be in snap-fit with the latch 5, the second link 7 is substantially horizontally arranged below the handle 2 and located between the handle 2 and the release 101, one end of the second link 7 is hinged with the first link 3 and slides along the chute 42, the other end is connected with the lever 6, by respectively arranging the jump buckle 4 and the latch 5 at two sides of the handle 2, the space between the handle 2 and the release 101 is fully utilized, and the arm of force L2 of the release force can be effectively enlarged, the circuit breaker created by the present invention has a compact structure and a reasonable layout, the occupied space is concentrated, the proportion is small, the operating mechanism fully utilizes the internal limited space, more functional modules can be integrated in the internal limited space of the product, and more use functions of the product are realized.

The release 101 of this embodiment is an electromagnetic release, and can trigger the latch 5 when the circuit breaker is short-circuited, and release the snap-fit between the latch 5 and the trip 4, so that the circuit breaker is tripped and broken, and circuit protection is realized. The tripper 101 is connected with the static contact 9, an arc extinguish chamber can be further arranged below the tripper 101, wiring terminals are further respectively arranged on two sides of the circuit breaker, and the static contact 9 is located above the inlet side of the arc extinguish chamber. Of course, the release 101 may also be an electric leakage release or an overload release, and an electromagnetic release, an electric leakage release or an overload release may also be disposed in the circuit breaker as needed, and is used to drive the latch 5 when the circuit breaker fails, which is the prior art in the field and is not described again.

As shown in fig. 11, the housing 1 of the present invention includes an upper cover (not shown in the figure) and a base that can be matched and fastened, and a base bottom plate of the housing 1 is provided with a first rotating shaft 12 for pivotally mounting the handle 2, a second rotating shaft 11 for pivotally mounting the jump buckle 4, a third rotating shaft 14 for pivotally mounting the lever 6 and the lock catch 5, a first stopping boss 13, and a limiting cylinder 15. In the embodiment, the lock catch 5 and the lever 6 are coaxially and rotatably mounted on the third rotating shaft 14 and are arranged in a stacked manner, so that the space is saved; of course, the axes of the lock catch 5 and the lever 6 may be different.

As shown in fig. 12, the handle 2 of the present invention comprises a hand-held portion 21 and a rotating portion 22 which are integrally connected, the hand-held portion 21 at one end of the handle 2 extends out of the housing 1 for pulling operation, and the rotating portion 22 at the other end is provided with a first shaft hole 23 for pivotally mounting on the housing 1 and a first hinge hole 24 for hinging with the first link 3. The handle 2 is rotatably sleeved on the first rotating shaft 12 of the housing 1 through the first shaft hole 23 on the rotating part 22. A fourth torsion spring for resetting the handle 2 is arranged at the pivot joint of the handle 2 and the shell 1, one foot of the fourth torsion spring is abutted against the shell 1, and the other foot of the fourth torsion spring is abutted against the handle 2. The two ends of the rotation stroke of the handle 2 are matched with the operation stop piece of the shell 1 to limit the two ends of the stroke of the handle 2. As shown in fig. 2, when the circuit breaker is in an off state, the holding portion 21 of the handle 2 is blocked by the stop member operated by the housing 1 at the left end; as shown in fig. 5, when the circuit breaker is in a closed state, the holding portion 21 of the handle 2 is stopped by the operation stop member of the housing 1 at the right end.

In this embodiment, the first link 3 is a U-shaped rod, one end of the U-shaped rod is hinged to the first hinge hole 24 of the handle 2, the other end of the U-shaped rod is hinged to the second hinge hole 71 of the second link 7, the U-shaped rod is inserted into the sliding groove 42 of the jump buckle 4, and one end of the U-shaped rod connected to the second link 7 is directly used as a hinge shaft inserted into the sliding groove 42.

As shown in fig. 13-14, the jump buckle 4 created by the present invention is an integrally formed structure, and includes a jump buckle rotating portion 401, a chute section 402 and a jump buckle arm 403, which are connected in sequence, the jump buckle rotating portion 401 is cylindrical, the chute section 402 is square block, the jump buckle arm 403 is L-shaped, the chute section 402 and the jump buckle arm 403 are connected in a bending manner, and the jump buckle arm is slightly inclined toward the lower side far from the handle 2, wherein the chute section 402 and the jump buckle arm 403 can be matched with the clamping gap 75 of the second connecting rod 7, the chute section 402 and the jump buckle arm 403 are arranged in parallel and level, the jump buckle rotating portion 401 protrudes from the top surface of the chute section 402, and the jump buckle rotating portion 401 is provided with a notch avoiding the second connecting rod 7; the jump buckle rotating part 401 is provided with a second shaft hole 41, and the jump buckle 4 is rotatably sleeved on the second rotating shaft 11 of the shell 1 through the second shaft hole 41 on the jump buckle; the chute section 402 is provided with a chute 42, preferably, the chute 42 is a long strip-shaped kidney-shaped hole, and the chute 42 is a straight chute slightly inclined from the rotating axis of the jump buckle 4 to the upper part close to the handle 2. Preferably, a convex buckle hook is arranged on the outer side of a corner of the L-shaped block-shaped jump buckle arm 403, a convex sliding arc surface 44 in sliding fit with the buckle 5 is arranged on the end surface of the jump buckle arm 403, and a buckle edge 43 capable of being buckled with the buckle table 53 of the buckle 5 is arranged at the joint of the sliding arc surface 44 and the buckle hook.

As shown in fig. 14, a point where the connection line of the center O of the sliding arc surface 44 where the snap edge 43 is located and the rotation axis of the jump buckle 4 intersects with the sliding arc surface 44 is a position where the sliding arc surface 44 where the snap edge 43 is located farthest from the rotation axis of the jump buckle 4 and is located above the snap hook, so as to form a cam. Namely, a connecting line from the rotation axis of the jump buckle 4 to the sliding arc surface 44 through the center O of the sliding arc surface 44 where the buckle edge 43 is located is L3, a connecting line from the rotation axis of the jump buckle 4 to the buckle edge 43 is L4, an angle α is formed between the connecting line L3 and the L4, the angle α is an acute angle and is smaller, under the condition that the lengths of L3 and L4 are not changed, the smaller the angle α is, the faster the lock catch 5 rotates, and the length of the connecting line L3 is greater than the length of the connecting line L4.

As shown in fig. 7, after the jumper 4 and the lock catch 5 are tripped, the operating mechanism is converted into a five-bar mechanism (excluding the jumper 4) composed of the housing 1, the handle 2, the first link 3, the second link 7 and the lever 6, the five-bar mechanism has two degrees of freedom, the lever 6 rotates counterclockwise under the action of the first torsion spring 102 to drive the second link 7 and the first link 3 to move, the jumper 4 is pulled by the second link 7 to rotate rapidly around the second rotating shaft 11, as shown in fig. 8, the sliding arc surface 44 of the jumper 4 slides tangentially along the guide protrusion 54 (fig. 16) of the lock catch 5 as a sliding surface to push the lock catch 5 to rotate, and the rotation angle of the lock catch 5 is determined by the difference between the connecting line L3 and the connecting line L4 of the jumper 4 and is proportional to the difference between the connecting line L3 and the connecting line L4. As shown in fig. 9-10, when the connecting line of the first shaft hole 23 and the first hinge hole 24 of the handle 2 and the line of the first link 3 main body are rotated to be in a straight line, the jump buckle 4 is rotated by a maximum angle, and the sharp point feature 45 of the jump buckle 4 cannot exceed the surface of the guide protrusion 54 of the lock catch 5, so as to prevent the lock catch 5 from blocking the jump buckle 4 and preventing the jump buckle 4 from being reset. When the lever 6 moves to a disconnected state, namely the limit inclined plane 64 of the lever 6 abuts against the limit cylinder 15 of the shell 1, at the moment, the lever 6 is supported by the limit cylinder 15 of the shell 1 to be in a static state, the handle 2, the first connecting rod 3, the second connecting rod 7 and the shell 1 form a four-bar mechanism, the handle 2 rotates anticlockwise under the action of a fourth torsion spring, so that the first connecting rod 3 and the second connecting rod 7 are driven to move, the first connecting rod 3 drives the jump buckle 4 to rotate anticlockwise through the sliding groove 42 of the jump buckle 4, when the handle 2 rotates to a disconnected position, the sliding arc surface 44 of the jump buckle 4 returns along the guide bulge 54 of the lock catch 5, at the moment, the buckle edge 43 of the jump buckle 4 is positioned on the upper side of the buckle table 53 of the lock catch 5, and preparation is made for the re-buckling of the tripping mechanism.

As shown in fig. 15-16, one end of the latch 5 provided by the present invention is provided with a fourth shaft hole 51, the latch 5 is rotatably sleeved on the third rotating shaft 14 of the housing 1 through the fourth shaft hole 51 thereon, and the bottom surface of the other end of the latch 5 is provided with a trip driving portion 56 protruding downward, which is arranged corresponding to the thimble of the trip 101 of the circuit breaker and is located at the side of the trip 101; be equipped with convex hasp convex part 50 downwards on the bottom surface that the middle part of hasp 5 is close to fourth shaft hole 51 position, form between hasp convex part 50 and the dropout drive division 56 and dodge the groove of dodging second connecting rod 7, be equipped with convex universal driving shaft 52 downwards on the hasp convex part 50, to the convex direction arch 54 of side as with jump knot 4 complex glide plane, be equipped with hasp platform 53 on the side of hasp convex part 50, can with jump knot 4's hasp edge 43 lock, direction arch 54 sets up with the bottom surface interval of hasp 5 to do not dodge second connecting rod 7, direction arch 54 can stretch in the joint clearance 75 of second connecting rod 7, the top surface of hasp 5 is equipped with linkage groove 55 on the position corresponding with universal driving shaft 52. One side of the lock catch 5 is provided with a linkage shaft 52 which can be inserted into a linkage groove 55 adjacent to the circuit breaker, the other side of the lock catch 5 is provided with a linkage groove 55 into which another linkage shaft 52 adjacent to the circuit breaker can be inserted, the lock catch 5 can be respectively linked with operating mechanisms adjacent to the two circuit breakers through the linkage shaft 52 and the linkage groove 55 on the lock catch 5, when the tripping mechanism is tripped, the lock catch 5 is pushed by the trip catch 4 to rotate for a certain angle, and the operating mechanisms adjacent to the circuit breakers are driven to trip through the linkage shaft 52 or the linkage groove 55, so that inter-pole linkage of the circuit breakers is realized. Of course, the latch 5 may be provided with only the link shaft 52 or the link groove 55 for connecting with the operating mechanism of the adjacent circuit breaker.

As shown in fig. 17, the second link 7 of the present invention includes two link plates 73 and two connecting ribs 74 connected between the two link plates 73, where the two connecting ribs 74 are spaced apart and located on the same side of the two link plates 73, a clamping gap 75 is provided between the two link plates 73 for avoiding the jump buckle 4 and/or the buckle 5 and/or the lever 6, one end of the two link plates 73 is aligned to be provided with a second hinge hole 71 for being hinged to the first link 3, and the other end of the two link plates 73 is aligned to be provided with a third hinge hole 72 for being hinged to the lever 6. When the sliding groove section 402 of the jump buckle 4 is clamped in the clamping gap 75 of the second connecting rod 7, the second hinge hole 71 of the second connecting rod 7 is opposite to the sliding groove 42 of the jump buckle 4, and one end of the first connecting rod 3 can simultaneously penetrate through the sliding groove 42 of the jump buckle 4 and the two second hinge holes 71 at one end of the second connecting rod 7. The second connecting rod 7 adopts two connecting rod sheets 73 to form a clamping gap 75 for avoiding and connecting the jump buckle 4 and the lever 6, is not connected reliably and occupies small space.

As shown in fig. 18, the lever 6 of the present invention includes a lever plate 60, a connecting rib 600 disposed on the lever plate 60, a supporting boss 68, a stopping boss 66, and a third stopping boss 65, where the connecting rib 600 is disposed along an edge of the lever plate 60 and located between the stopping boss 66 and the third stopping boss 65, a fourth rotating shaft 67 for pivotally mounting the movable contact 8 is disposed on the supporting boss 68, the supporting boss 68 is connected with the stopping boss 66 and the connecting rib 600 and is lower than the stopping boss 66 and the connecting rib 600 so as to form an avoiding space for avoiding the movable contact 8, and one end of the movable contact 8 is rotatably sleeved on the fourth rotating shaft 67 of the lever 6 through a fifth shaft hole 82 formed thereon and falls on the supporting boss 68; the third resisting boss 65 is arranged at one corner of the lever plate 60, the corner of the lever plate 60 extends outwards to form an extending portion 601, a limiting inclined surface 64 is arranged at one side of the connecting position of the extending portion 601 and the lever plate 60 and matched with the limiting cylinder 15 of the shell 1, a circular clamping portion 602 is arranged at the other side of the extending portion and matched with the clamping gap 75 of the second connecting rod 7, and a fourth hinge hole 63 is formed in the clamping portion 602 and used for being connected with the second connecting rod 7; the bottom surface of the middle part of the extending part 601 is provided with a second resisting boss 62 for resisting one leg of the first torsion spring 102, and the end part of the extending part 601 is provided with a third shaft hole 61 for pivotally mounting the lever 6, and is matched with the third rotating shaft 14 of the shell 1. The limit inclined plane 64 of the lever 6 is in contact with the limit cylinder 15 of the housing 1, and the movable contact 8 and the fixed contact 9 are at separated positions so as to position and limit the position end point of the lever 6 in the state that the circuit breaker is disconnected or tripped. One end of the first connecting rod 3 is hinged with the first hinge hole 24 of the handle 2, and the other end of the first connecting rod 3 is hinged with the second hinge hole 71 of the second connecting rod 7 and inserted into the sliding groove 42 of the jump buckle 4; the clamping portion 602 of the lever 6 is clamped in the clamping gap 75 of the second connecting rod 7, the third hinge hole 72 of the second connecting rod 7 is aligned with the fourth hinge hole 63 of the lever 6, and the second connecting rod 7 can be hinged to the lever 6 by inserting a pin.

As shown in fig. 1 to 10, one end of the latch 5 is pivotally mounted on the housing 1 to be located at the side of the handle 2, the other end is located at the side of the trip unit 101, one end of the lever 6 is pivotally mounted on the housing 1 to be located at the side of the handle 2, and the other end of the lever 6 is located at the side of the trip unit 101. Preferably, the latch 5 is stacked on the lever 6 and is arranged on the same rotating shaft with the lever 6, the lever 6 is rotatably sleeved on the third rotating shaft 14 of the housing 1 through a third shaft hole 61 on the lever 6, a lever elastic member for resetting the lever 6 is arranged between the lever 6 and the housing 1, the latch 5 is rotatably sleeved on the third rotating shaft 14 of the housing 1 through a fourth shaft hole 51 on the latch 5, and a latch elastic member for resetting the latch 5 is arranged between the latch 5 and the housing 1. Specifically, the lever elastic member is a first torsion spring 102, a first torsion spring 102 for resetting the lever 6 is installed at the pivot connection position of the lever 6 and the housing 1, one leg of the first torsion spring 102 abuts against the first abutting boss 13 of the housing 1, and the other leg abuts against the second abutting boss 62 of the lever 6; the lock catch elastic part is a second torsion spring 103, the pivot joint of the lock catch 5 and the shell 1 is provided with the second torsion spring 103 for resetting the lock catch 5, one leg of the second torsion spring 103 is abutted against the shell 1, and the other leg of the second torsion spring is abutted against the lock catch 5. When the operating mechanism is normally closed and opened, the tripping mechanism consisting of the jump buckle 4 and the lock catch 5 is in a static state, when the circuit fault current triggers the action of the tripper 101, the tripper 101 drives the lock catch 5 to rotate anticlockwise, the hasp edge 43 is separated from the hasp table 53, the lock catch 5 rotates around the third rotating shaft 14, the cam-five-bar mechanism is changed into a six-bar mechanism, the six-bar mechanism has two degrees of freedom, and the lever 6 is restored to an open position under the drive of the first torsion spring 102.

As shown in fig. 1-10, the movable contact 8 of the present invention is pivotally mounted on the lever 6, an over-travel elastic element is disposed between the movable contact 8 and the lever 6, and the movable contact 8 is rotatably sleeved on the fourth rotating shaft 67 of the lever 6 through a fifth shaft hole 82 thereon; the over travel elastic element is a third torsion spring 104, the pivot connection between the movable contact 8 and the lever 6 is provided with the third torsion spring 104, one leg of the third torsion spring 104 abuts against the third resisting boss 65 of the lever 6, and the other leg abuts against the resisting side 83 on one side of the movable contact 8. As shown in fig. 19, the other side of the movable contact 8 is provided with a stopping protrusion 81, and the lever 6 is provided with a stopping boss 66 corresponding to the stopping protrusion 81. Further, as shown in fig. 19, a convex contact arc surface 84 is provided on a side of the movable contact 8, and can be in contact connection with the stationary contact 9. The stopping protrusion 81 of the moving contact 8 is in contact with the stopping boss 66, when the moving contact 8 and the static contact 9 are in a disconnected state, the third torsion spring 104 applies an initial pressure to the moving contact 8 and the lever 6, the moving contact 8 and the lever 6 form an integral motion, after the moving contact 8 is in contact with the static contact 9, the moving contact 8 rotates a certain angle around the fourth rotating shaft 67 relative to the lever 6, the stopping protrusion 81 is separated from the stopping boss 66, and the third torsion spring 104 applies a final pressure to the moving contact, so that reliable contact between the moving contact 8 and the static contact 9 is ensured. A pressure torsion spring is arranged between the moving contact 8 and the lever 6, so that reliable contact between the moving contact and the fixed contact is ensured; the lever 6, the moving contact 8 and the static contact 9 form a rocker slider mechanism, and the contact arc surface 84 slides and rubs along the surface of the static contact 9, so that an oxidation film on the surface of the moving contact and the static contact can be effectively removed, and the conductivity between the moving contact and the static contact is improved.

As shown in fig. 2-3, when the circuit breaker is in an off state, the handheld portion 21 of the handle 2 swings to the left side to contact with the housing 1, the end of the first link 3 connected to the handle 2 is located on the right side of the rotation axis of the handle 2, the end of the first link 3 connected to the second link 7 slides to the end of the chute 42 away from the rotation axis of the trip buckle 4, the buckle edge 43 of the trip buckle 4 is buckled with the buckle platform 53 of the buckle 5, the limit inclined surface 64 (fig. 18) of the lever 6 contacts with the limit cylinder 15 of the housing 1, and the movable contact 8 and the static contact 9 are located at separate positions. When the circuit breaker is in a closed state, as shown in fig. 5-6, the handheld portion 21 of the handle 2 swings to the right side to contact with the housing 1, the end of the first link 3 connected with the handle 2 swings to the left side of the rotation axis of the handle 2, the end of the first link 3 connected with the second link 7 slides to the left side to the end of the chute 42 away from the rotation axis of the trip buckle 4, so that the second link 7 pulls the lever 6, the lever 6 drives the moving contact 8 to swing to the left side to contact with the static contact 9, the first link 3 and the handle 2 form a certain closing angle, and the moving contact 8 and the static contact 9 are in a closed state. When the breaker has a fault such as a short circuit, the thimble of the release 101 impacts the release driving part 56 of the latch 5, so that the latch 5 rotates counterclockwise, the snap-fit between the trip 4 and the latch 5 is released, the lever 6 drives the moving contact to swing to the right side to be separated from the static contact, the trip 4 rotates clockwise, and the hinge shaft of the first connecting rod 3 and the second connecting rod 7 slides to the right side along the chute 42.

The foregoing is a more detailed description of the invention, taken in conjunction with the accompanying preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the inventive concept, and all should be considered as falling within the protection scope of the invention.

Claims

1. The utility model provides a circuit breaker, includes casing (1), handle (2), first connecting rod (3), jump and detain (4), hasp (5), second connecting rod (7), lever (6), moving contact (8) and static contact (9), its characterized in that: the jump buckle (4) and the lock catch (5) are respectively pivotally mounted on the shell (1), and the jump buckle (4) is provided with a sliding groove (42) and a jump buckle buckling part which is in hasp fit with a buckling platform (53) of the lock catch (5); the handle (2) is pivotally mounted on the shell (1), one end of the first connecting rod (3) is connected with the handle (2), the other end of the first connecting rod (3) is hinged with one end of the second connecting rod (7), the other end of the second connecting rod (7) is connected with the lever (6), and the hinged ends of the first connecting rod (3) and the second connecting rod (7) are in sliding fit with the sliding groove (42) of the jump buckle (4); the lever (6) is pivotally arranged on the shell (1), one end of the moving contact (8) is arranged on the lever (6), and the other end of the moving contact (8) is arranged corresponding to the static contact (9).

2. The circuit breaker of claim 1, wherein: handle (2) rotate the installation through first pivot (12), hasp (5) rotate the installation through third pivot (14), jump knot (4) one end and rotate the installation through second pivot (11), hasp edge (43) and hasp (5) meshing cooperation of the other end, first pivot (12), third pivot (14) and second pivot (11) are located an obtuse triangle's three summit department, wherein first pivot (12) are located this obtuse triangle's obtuse vertex department.

3. The circuit breaker of claim 1, wherein: jump and detain (4) one end and rotate the installation, the other end be equipped with hasp (5) hasp portion of jumping of hasp complex, spout (42) set up jump detain (4) the rotation axle center with jump detain between the hasp portion, hasp (5) one end is rotated the installation, and the other end is equipped with and is used for triggering dropout drive division (56) of dropout, and hasp (5) be equipped with jump detain hasp portion sliding fit's glide plane of jumping detaining (4), be equipped with on the glide plane with jump detain hasp portion hasp complex bellied hasp platform (53).

4. The circuit breaker of claim 1, wherein: hasp (5) and lever (6) are with the pivot setting, lever (6) are rotationally overlapped on third pivot (14) of casing (1) through third shaft hole (61) on it, are equipped with the lever elastic component that is used for lever (6) to reset between lever (6) and casing (1), hasp (5) are rotationally overlapped on third pivot (14) of casing (1) through fourth shaft hole (51) on it, are equipped with the hasp elastic component that is used for hasp (5) to reset between hasp (5) and casing (1).

5. The circuit breaker of claim 1, wherein: when the circuit breaker is in a closed state, the pressure of the chute (42) of the jump buckle (4) at the hinged end of the first connecting rod (3) and the second connecting rod (7) is F1, the moment arm is L1, the positive pressure of the jump buckle part of the jump buckle (4) at the buckle table (53) of the buckle (5) is F2, the moment arm is L2, and the length ratio of the moment arm L1 to the L2 is less than 1/4.

6. The circuit breaker of claim 3, wherein: jump and detain (4) including consecutive jump knot rotation portion (401), spout section (402) and jump knot hasp arm (403), jump and detain rotation portion (401) and be equipped with second shaft hole (41), spout section (402) are equipped with spout (42), the tip corner of jump knot hasp arm (403) is equipped with bellied hasp and colludes, the terminal surface of jump knot hasp arm (403) be equipped with bellied and hasp (5) sliding fit's slip arc surface (44), slip arc surface (44) with hasp collude the hasp edge (43) that department of meeting is hasp platform (53) lock that can with hasp (5).

7. The circuit breaker of claim 6, wherein: a connecting line from the rotating axis of the jump buckle (4) to the sliding arc surface (44) through the center O of the sliding arc surface (44) is L3, a connecting line from the rotating axis of the jump buckle (4) to the hasp edge (43) is L4, an angle alpha is formed between the connecting line L3 and the L4, the angle alpha is an acute angle, and the length of the connecting line L3 is greater than that of the connecting line L4.

8. The circuit breaker of claim 3, wherein: a fourth shaft hole (51) is formed in one end of the lock catch (5), and a downward-protruding tripping driving part (56) is arranged on the bottom surface of the other end of the lock catch (5); be equipped with convex hasp convex part (50) downwards on the bottom surface that the middle part of hasp (5) is close to fourth shaft hole (51) position, form between hasp convex part (50) and the dropout drive division (56) and dodge the groove of dodging of second connecting rod (7), be equipped with protruding direction (54) to side on hasp convex part (50) as with jump knot (4) complex glide plane, be equipped with on the side of hasp convex part (50) with jump knot (4) hasp platform (53) of hasp complex, the bottom surface interval setting of protruding (54) and hasp (5) of direction.

9. The circuit breaker according to any one of claims 1-8, wherein: the bottom surface of the lock catch (5) is provided with a downward convex linkage shaft (52), and the top surface of the lock catch (5) is provided with a linkage groove (55) at the position corresponding to the linkage shaft (52).

10. The circuit breaker according to any one of claims 1-8, wherein: second connecting rod (7) include two connecting rod pieces (73) and connect link (74) between two connecting rod pieces (73), joint clearance (75) have between two connecting rod pieces (73) for dodge jump knot (4) and or hasp (5), the one end alignment of two connecting rod pieces (73) is equipped with and is used for articulating second hinge hole (71) with first connecting rod (3), and the other end alignment of two connecting rod pieces (73) is equipped with and is used for articulating third hinge hole (72) with lever (6).

11. The circuit breaker according to any one of claims 1-8, wherein: the moving contact (8) is pivotally arranged on the lever (6), and the moving contact (8) is rotatably connected to the lever (6); and a third torsion spring (104) is arranged at the joint of the movable contact (8) and the lever (6), one leg of the third torsion spring (104) is abutted against the lever (6), and the other leg is abutted against the movable contact (8).

12. The circuit breaker of claim 11, wherein: the moving contact (8) is provided with a stop protrusion (81), and the lever (6) is provided with a stop boss (66) corresponding to the stop protrusion (81).

13. The circuit breaker according to any one of claims 1-8, wherein: the lever (6) comprises a lever plate (60) and a support boss (68) arranged on the lever plate (60), and a fourth rotating shaft (67) for pivotally mounting the moving contact (8) is arranged on the support boss (68); one corner of the lever plate (60) extends outwards to form an extending part (601), one side of the connecting part of the extending part (601) and the lever plate (60) is provided with a limiting inclined plane (64) which is used for being matched with a limiting cylinder (15) of the shell (1), and the other side of the extending part is provided with a fourth hinge hole (63) which is used for being hinged with the second connecting rod (7); the end of the extension part (601) is provided with a third shaft hole (61) for the pivotal installation of the lever (6).

14. The circuit breaker according to any one of claims 1-8, wherein: the first connecting rod (3) is a U-shaped rod, one end of the U-shaped rod is hinged to the first hinge hole (24) of the handle (2), the other end of the U-shaped rod is hinged to the second hinge hole (71) of the second connecting rod (7), and the U-shaped rod is inserted into the sliding groove (42) of the jump buckle (4).