CN113871265A - Opening and closing mechanism of circuit breaker - Google Patents

Abstract

The invention discloses a switching-off and switching-on mechanism of a circuit breaker, which relates to the field of circuit breakers and comprises a shell, a handle, a contact support, a moving contact, a lock catch and a jump buckle, wherein the contact support and the handle are respectively rotatably installed in the shell, the lock catch and the moving contact are respectively and hingedly installed on the contact support, the contact support is provided with a third installation part, a second installation part and a first installation part, the third installation part is used for installing the moving contact and is positioned at the lower end, the second installation part is used for installing the lock catch and is larger than the third installation part in thickness and size and positioned in the middle, the first installation part is used for installing the jump buckle and is positioned at the upper end, the moving contact is provided with a lug extending outwards in the radial direction and is positioned between the lock catch and the contact support, and one side of the lock catch facing the moving contact is provided with a first recess avoiding the movement range of the lug. The invention has the advantages of small occupied space and reasonable layout.

Description

Opening and closing mechanism of circuit breaker

Technical Field

The invention relates to the field of circuit breakers, in particular to a switching-on and switching-off mechanism of a circuit breaker.

Background

The breaker is a switch capable of providing various protection functions, and can effectively improve the safety and reliability of electrical equipment and power lines. In order to meet the increasingly diversified demands of users, specification diversification and miniaturization of circuit breakers are a trend; the thickness direction of the opening and closing mechanism of the traditional circuit breaker at present generally needs 18mm of space to place, and the requirement of the miniaturization of the circuit breaker volume can not be met.

Disclosure of Invention

In order to overcome the defects of the background art, the invention provides the switching-on and switching-off mechanism of the circuit breaker, which has small occupied space and meets the miniaturization requirement of the circuit breaker.

The technical scheme adopted by the invention is as follows: the utility model provides a divide-shut brake mechanism of circuit breaker, includes shell, handle, contact support, moving contact, hasp and jump and detain, contact support, handle rotate respectively and install in the shell, hasp and moving contact are articulated respectively to be installed on the contact support, the contact support is equipped with the confession the third installation department of moving contact installation and being located the lower extreme, confession the hasp installation and thickness dimension are greater than the third installation department and are located middle second installation department and supply jump detain the installation and are located the first installation department of upper end, the moving contact is equipped with along radial outside extension and is located the lug between hasp and the contact support.

One side of the lock catch facing the moving contact is provided with a first recess avoiding the motion range of the convex piece.

Jump and detain the articulated installation in on the contact supports, and it is equipped with the hasp face that corresponds the hasp, the hasp upper end is equipped with the sand grip, the sand grip be equipped with down set up and with hasp face complex recess.

The second installation department is equipped with the second erection column that supplies the articulated installation of hasp, one side of second erection column is equipped with the second and caves in, the sunken downside of second is equipped with the support the lug just rather than the first boss of sliding fit, the third installation department is equipped with the fourth boss that just supplies the moving contact installation such as height with first boss, the second erection column is located the place ahead of lug swing orbit and the two constitutes spacing cooperation.

The sunken upside of second is equipped with the third boss, the hasp is equipped with the second mounting hole with second erection column articulated, first sunken being located one side of second mounting hole, the opposite side of second mounting hole is equipped with slides complex fifth boss with the third boss, the lateral wall of fifth boss is equipped with a plurality of sixth bosses even as an organic whole with second mounting hole inner wall.

A second boss is arranged on the left side of the second recess, a seventh boss which is matched with the second boss in a sliding manner is arranged on one side of the first recess, which is far away from the second mounting hole, a first step surface is arranged above the second boss, and a second step surface corresponding to the first step surface is arranged above the seventh boss;

the surface of the contact support far away from the second mounting column is provided with a counter bore corresponding to the position of the second mounting column, a through hole is formed in the second mounting column, and the shell is provided with a convex block embedded into the counter bore and a mounting shaft inserted into the convex block and penetrating through the through hole.

The shell is provided with first limiting bosses at positions corresponding to two sides of the handle, and the handle and the jump buckle are connected in a linkage mode through a U-shaped connecting rod.

The shell is internally provided with a second limit boss corresponding to the side wall of the contact support, the upper end supported by the contact is provided with a positioning column, the shell is provided with a spring installation position above the second limit boss, and a reset piece for abutting against the second limit boss is arranged between the positioning column and the spring installation position.

The shell is equipped with the elastic component in the top position department that is located the hasp, elastic component one end is contradicted at the shell lateral wall and the other end is put and is put on the sand grip.

The invention has the beneficial effects that: this technical scheme is in order to adapt to the miniaturized demand of miniature circuit breaker, to the jump hasp, the overall arrangement that moving contact and contact supported is adjusted, with the moving contact centre gripping between hasp and contact support, and what the contact supported in addition divide into first installation department, second installation department and third installation department, the three is the echelonment, the thickness dimension when the hasp that has significantly reduced, moving contact and contact support installation, it is little to have occupation space, advantage that the overall arrangement is reasonable.

Drawings

Fig. 1 is a schematic structural diagram of a switching-on/off mechanism of a circuit breaker according to an embodiment of the present invention.

Fig. 2 is a schematic back structure diagram of the opening and closing mechanism of the circuit breaker.

Fig. 3 is a schematic structural view of the contact support.

Fig. 4 is a schematic structural diagram of a contact support, a trip and a movable contact.

Fig. 5 is a schematic structural view of the latch.

Fig. 6 is a schematic view of the back structure of the latch.

Fig. 7 is a schematic structural view of the housing.

Fig. 8 is a schematic structural diagram of the breaker during opening.

Fig. 9 is a schematic structural diagram of the circuit breaker when closing.

Fig. 10 is a schematic diagram of the circuit breaker tripping moment.

Detailed Description

The embodiments of the invention will be further described with reference to the accompanying drawings in which:

as shown in the figure, the opening and closing mechanism of the circuit breaker comprises a shell 1, a handle 2, a contact support 3, a movable contact 4, a latch 5 and a trip catch 6, wherein the contact support 3 and the handle 2 are respectively rotatably installed in the shell 1, the latch 5 and the movable contact 4 are respectively and hingedly installed on the contact support 3, the contact support 3 is provided with a third installation part 33, a second installation part 32 and a first installation part 31, the third installation part 33 is used for installing the movable contact 4 and is located at the lower end, the second installation part 32 is used for installing the latch 5 and is larger than the third installation part in thickness and is located in the middle, the first installation part 31 is used for installing the trip catch 6 and is located at the upper end, the movable contact 4 is provided with a lug 41 which extends outwards in the radial direction and is located between the latch 5 and the contact support 3, and one side of the latch 5 facing the movable contact 4 is provided with a first recess 51 which avoids the movement range of the lug 41; this technical scheme is in order to adapt to the miniaturized demand of miniature circuit breaker, to the jump hasp, the overall arrangement that moving contact and contact supported is adjusted, with the moving contact centre gripping between hasp and contact support, and what the contact supported in addition divide into first installation department, second installation department and third installation department, the three is the echelonment, the thickness dimension when the hasp that has significantly reduced, moving contact and contact support installation, it is little to have occupation space, advantage that the overall arrangement is reasonable.

Jump and detain 6 articulated installation on the contact supports 3, and it is equipped with the hasp face 61 that corresponds hasp 5, 5 upper ends of hasp are equipped with sand grip 52, the sand grip is equipped with and sets up down and with hasp face 61 complex recess 53, the upper end that the contact supported is made thin, and install the back with jumping and pass through rivet connection the two.

The second mounting part 32 is provided with a second mounting column 34 for the hinged mounting of the lock catch 5, one side of the second mounting column 34 is provided with a second recess 35, the lower side of the second recess 35 is provided with a first boss 36 for supporting the protruding piece 41 and matched with the protruding piece in a sliding manner, the third mounting part 33 is provided with a fourth boss 37 which has the same height as the first boss 36 and is used for mounting the movable contact 4, the second mounting column 34 is positioned in front of the swinging track of the protruding piece 41, and the second mounting column 34 and the protruding piece 41 form limit matching; the first boss and the fourth boss can be used for supporting the moving contact, so that the friction force generated by supporting contact with the contact can be reduced in the swinging process of the moving contact under the action of the spring force, the moving contact can stably swing horizontally and cannot swing up and down in the vertical direction; the third mounting column 371 for the moving contact to be mounted on the fourth boss 37 is located below the lock catch, the height of the third mounting column is flush with the height of the lock catch, and the lock catch completely avoids the contact spring and the third mounting column during movement, so that the mounting position supported by the moving contact and the contact has no influence of the height of the lock catch, and the size of the operating mechanism is reduced. And because there is not influence of the height of the lock catch, the thickness of the contact support at the position is enhanced, the strength of the contact support is increased, the force transmitted to the contact support by the handle through the U-shaped connecting rod and the jump buckle can not deform the contact support, and the service life of the mechanism is prolonged.

A third boss 38 is arranged on the upper side of the second recess 35, a second mounting hole 54 hinged with the second mounting column 34 is arranged on the lock catch 5, the first recess 51 is positioned on one side of the second mounting hole 54, a fifth boss 55 matched with the third boss in a sliding manner is arranged on the other side of the second mounting hole 54, and a plurality of sixth bosses 56 integrated with the inner wall of the second mounting hole 54 are arranged on the side wall of the fifth boss 55;

a second boss 39 is arranged on the left side of the second recess 35, a seventh boss 57 in sliding fit with the second boss 39 is arranged on one side of the first recess 51 away from the second mounting hole 54, a first step surface 391 is arranged above the second boss 39, and a second step surface 571 corresponding to the first step surface is arranged above the seventh boss 57; the second mounting hole of the lock catch is hinged to the second mounting column, the fifth boss and the third boss of the lock catch are in contact with each other, and the seventh boss and the second boss of the lock catch are in contact with each other, so that the thickness of the lock catch is reduced, the strength of the lock catch is ensured, and the stable mounting of the lock catch is ensured;

the surface of the contact support far away from the second mounting column 34 is provided with a counter bore 341 corresponding to the position of the second mounting column 34, the second mounting column 34 is provided with a through hole 342, the shell is provided with a lug 15 embedded in the counter bore 341 and a mounting shaft (not shown) inserted into the lug 15 and passing through the through hole, and under the condition that the whole thickness is limited, the strength of the contact support can be increased under the condition that the thickness is not increased only by adding a concave counter bore to the contact support.

Through setting up the second and sunken, make first boss, third boss and second boss shaping, first boss, fifth boss and second boss all are the narrow limit, and first boss all can reduce frictional force with lug, second boss and seventh boss and fifth boss respectively when sliding the cooperation with the third boss.

The shell 1 is provided with a first limiting boss 11 at positions corresponding to two sides of the handle 2, and the handle 2 and the jump buckle 6 are in linkage connection through a U-shaped connecting rod 7.

Be equipped with the spacing boss 12 of second that corresponds contact support 3 lateral walls in the shell 1, the upper end that contact supported 3 is equipped with reference column 8, shell 1 is equipped with spring mounting position in the spacing boss's of second top, be equipped with the piece 14 that resets of contradicting the two between reference column 8 and the spring mounting position 13.

When a product is in a brake-off state, the handle is pushed to rotate anticlockwise, the handle drives the trip buckle to rotate around the rivet through the U-shaped connecting rod, when the hasp surface of the trip buckle abuts against the groove of the buckle, the trip buckle drives the buckle to rotate, the buckle abuts against the contact support, the drive contact support rotates, the contact support drives the moving contact to rotate, when the side surface of the handle touches the first limiting boss 11 rotating to the shell, the handle stops rotating, the moving contact contacts with the fixed contact, and the product is switched on.

When a short circuit fault occurs to a circuit, the electromagnetic mechanism acts under the driving of the coil and pushes the ejector rod in the electromagnetic mechanism to act rightwards, the ejector rod pushes the lock catch to rotate anticlockwise, the groove of the lock catch and the hasp surface of the jump buckle are separated when the lock catch rotates, and the mechanism is unlocked.

The contact supports counterclockwise rotation under the action of the reset piece 14, when the contact supports against the second limit boss 12 of the shell, the contact supports stop rotating, the contact supports and returns to the initial position, the shell 1 is provided with an elastic piece 58 at the position above the lock catch 5, one end of the elastic piece 58 is abutted against the side wall of the shell, and the other end is lapped on the convex strip 52; the latch also returns to the initial position by the resilient member 58. The jump buckle continues to rotate clockwise under the action of the U-shaped connecting rod at the moment of disengaging from the lock catch, and stops moving after rotating to the rightmost point. Then, the handle drives the jump buckle to rotate through the U-shaped connecting rod under the action of the reverse force of the handle spring, when the jump buckle is in contact with the lock catch, the jump buckle overcomes the reverse force of the lock catch return spring under the action force of the handle spring, the buckle surface of the jump buckle is pressed back to the position below the groove of the lock catch, when the side surface of the handle is in contact with the first limiting boss 11 which rotates to the other side of the shell, the handle stops rotating, and the handle and the jump buckle return to the initial position.

The elastic component adopts the torsional spring, just the elastic component does not set up the direction of height at the hasp, and the elastic component of current circuit breaker hasp all sets up the direction of height at the hasp, can make the thickness size increase like this, and this application adopts the setting at the same horizontal plane position of hasp, and as shown in the drawing setting is in hasp top position, the effectual whole height that has reduced the mechanism, has optimized structural configuration.

When the overload fault appears in the product, through great electric current in the bimetal, the bimetal generates heat and bends right under the effect of electric current, drives the pull rod and moves right, and the pull rod drives the hasp anticlockwise rotation through the rivet, and the recess of hasp and the hasp face of jump knot separate when the hasp rotates, and mechanism unblock.

The contact support is rotated counterclockwise by the reset member 14, and when the contact support abuts against the boss on the housing, the contact support stops rotating, the contact support returns to the initial position, and at this time, the latch returns to the initial position by the latch return spring. Jump detain and continue clockwise rotation under the effect of U type connecting rod in the twinkling of an eye that breaks away from with the hasp, rotate and stop motion behind the rightmost point, then drive to jump detain toward gyration by the handle through U type connecting rod under the counter-rotating force effect of handle spring, when jumping detain and hasp contact, jump detain under the effort of handle spring and overcome the counter-acting force of hasp reset spring, press the hasp face of jumping detain back under the recess face of hasp, when the boss of rotating the shell is touchhed to the side of handle, handle stall, handle and jump detain and get back to initial position.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the invention has been described in terms of the above specific embodiments, the inventive concept is not limited thereto and any modification applying the inventive concept is intended to be included within the scope of the patent claims.

Claims (9)

1. The utility model provides a divide-shut brake mechanism of circuit breaker, includes shell (1), handle (2), contact support (3), moving contact (4), hasp (5) and jump buckle (6), its characterized in that: contact support (3), handle (2) rotate respectively and install in shell (1), hasp (5) and moving contact (4) articulate respectively and install on contact support (3), contact support (3) are equipped with the confession moving contact (4) installation and be located third installation department (33), the confession of lower extreme second installation department (32) and confession that just the thickness dimension is greater than the third installation department and is located the centre hasp (5) installation and thickness dimension jump and detain (6) installation and be located first installation department (31) of upper end moving contact (4) are equipped with along radial outside extension and are located lug (41) between hasp (5) and contact support (3).

2. The opening/closing mechanism of a circuit breaker according to claim 1, characterized in that: one side of the lock catch (5) facing the movable contact (4) is provided with a first recess (51) avoiding the movement range of the convex piece (41).

3. The opening/closing mechanism of a circuit breaker according to claim 1, characterized in that: jump and detain (6) articulated installation on contact support (3), and it is equipped with hasp face (61) that corresponds hasp (5), hasp (5) upper end is equipped with sand grip (52), the sand grip be equipped with down set up and with hasp face (61) complex recess (53).

4. The opening/closing mechanism of a circuit breaker according to claim 1, characterized in that: second installation department (32) are equipped with second erection column (34) that supplies hasp (5) articulated installation, one side of second erection column (34) is equipped with second sunken (35), the downside of second sunken (35) is equipped with the support lug (41) and rather than first boss (36) of sliding fit, third installation department (33) are equipped with fourth boss (37) of just supplying moving contact (4) installation such as height with first boss (36), second erection column (34) are located the place ahead and the two of lug (41) swing orbit constitute spacing cooperation.

5. The opening/closing mechanism of a circuit breaker according to claim 2, characterized in that: the upside that the second is sunken (35) is equipped with third boss (38), hasp (5) are equipped with second mounting column (34) articulated second mounting hole (54), first sunken (51) are located one side of second mounting hole (54), the opposite side of second mounting hole (54) is equipped with slides complex fifth boss (55) with the third boss, the lateral wall of fifth boss (55) is equipped with a plurality of sixth boss (56) even as an organic whole with second mounting hole (54) inner wall.

6. The opening/closing mechanism of a circuit breaker according to claim 4, characterized in that: a second boss (39) is arranged on the left side of the second recess (35), a seventh boss (57) which is matched with the second boss (39) in a sliding manner is arranged on one side, away from the second mounting hole (54), of the first recess (51), a first step surface (391) is arranged above the second boss (39), and a second step surface (571) corresponding to the first step surface is arranged above the seventh boss (57);

the surface of the contact support, which is far away from the second mounting column (34), is provided with a counter bore (341) corresponding to the position of the second mounting column (34), a through hole (342) is arranged in the second mounting column (34), and the shell is provided with a convex block (15) embedded into the counter bore (341) and a mounting shaft inserted into the convex block (15) and penetrating through the through hole.

7. The opening/closing mechanism of a circuit breaker according to claim 1, characterized in that: the shell (1) is provided with a first limiting boss (11) at the position corresponding to the two sides of the handle (2), and the handle (2) and the jump buckle (6) are connected in a linkage manner through a U-shaped connecting rod (7).

8. The opening/closing mechanism of a circuit breaker according to claim 1, characterized in that: be equipped with second spacing boss (12) that correspond contact support (3) lateral wall in shell (1), the upper end that contact supported (3) is equipped with reference column (8), shell (1) is equipped with spring mounting position in the top of the spacing boss of second, be equipped with conflict two between reference column (8) and spring mounting position (13) and reset piece (14).

9. A switching on/off mechanism of a circuit breaker according to claim 3, characterized in that: the shell (1) is provided with an elastic piece (58) at the position above the lock catch (5), one end of the elastic piece (58) is abutted against the side wall of the shell, and the other end of the elastic piece is overlapped on the convex strip (52).

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