CN214043570U - Plastic case circuit breaker - Google Patents

Abstract

The utility model relates to the field of low-voltage electrical appliances, in particular to a plastic shell breaker, a jump buckle and a lock catch are respectively arranged at the middle part of a bracket and are matched with the lock catch, one end of an upper connecting rod is rotationally arranged on the jump buckle, the other end is hinged with one end of a lower connecting rod, the other end of the lower connecting rod is connected with a moving contact mechanism in a driving way, one end of a rocker arm is pivotally arranged on the bracket, the rocker arm is matched with the jump buckle in a driving way, a traction rod is rotationally arranged at one side of the bracket, the draw bar comprises a draw bar positioning shoulder, the bracket comprises a first side wall and a second side wall which are oppositely arranged at intervals, the first side wall comprises a first side wall main body with a flat plate structure, when the molded case circuit breaker has overload or short circuit fault, the protection mechanism drives the traction rod to rotate, so that the positioning shoulder of the traction rod is in butt fit with the edge of the first side wall main body; the utility model discloses a moulded case circuit breaker, its operating device's traction lever action uniformity is good.

Description

Plastic case circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus field, concretely relates to moulded case circuit breaker.

Background

The existing molded case circuit breaker has the following problems:

the turntable of the electric operating device of the existing molded case circuit breaker is only provided with three indicating areas, and the tripping indicating accuracy is not high during closing during manual operation; and adopt the riveting cooperation between carousel and the electric operating means's the main shaft, it is easy not hard up, need rivet again after the dismantlement, the operation is inconvenient.

Secondly, in the existing molded case circuit breaker, the operating mechanism of the circuit breaker body has more re-buckling and bending times, the re-buckling turnover limit is a shaft on the bracket, and the consistency of the tripping stroke is not high; when the traction rod of the operating mechanism is turned, the re-buckling on the traction rod is matched with the bending part of the support for limiting, the turning angle is limited by the bending part of the support, and the support is complex in processing technology and low in consistency.

Third, the static contact reverse current section of the breaker body of the existing molded case circuit breaker is small, and the poor current limiting effect becomes a short plate factor of a breaking test.

Fourth, current moulded case circuit breaker, the explosion chamber volume of its circuit breaker body is less relatively, when carrying out the breaking test, appears the casing easily and explodes the problem such as split, the striking effect is not good.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a moulded case circuit breaker, its operating device's traction lever action uniformity is good.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a molded case circuit breaker comprises a circuit breaker body 1, wherein the circuit breaker body 1 comprises an operating mechanism, a moving contact mechanism 14a and a protection mechanism, and the operating mechanism comprises a bracket 11a, a traction rod 15a, a re-buckle 16a, a jump buckle 17a, a lock catch 19a, an upper connecting rod 12a, a lower connecting rod 13a and a rocker arm 18 a; the jump buckle 17a and the lock catch 19a are respectively arranged in the middle of the bracket 11a and matched with each other in a lock catch manner; one end of the upper connecting rod 12a is rotatably arranged on the jump buckle 17a, the other end of the upper connecting rod is hinged with one end of the lower connecting rod 13a, and the other end of the lower connecting rod 13a is in driving connection with the moving contact mechanism 14 a; one end of the rocker 18a is pivotally arranged on the bracket 11a, and the rocker 18a is in driving fit with the jump buckle 17 a; the traction rod 15a is rotatably arranged on one side of the bracket 11a and is in driving fit with the protection mechanism, the relocking 16a is arranged on the traction rod 15a and rotates synchronously with the traction rod, and the relocking 16a is in driving fit with the lock catch 19 a; the draw bar 15a comprises a draw bar positioning shoulder 150a, the bracket 11a comprises a first side wall 110a and a second side wall 111a which are arranged at intervals, the first side wall 110a comprises a first side wall main body 110-0a with a flat plate structure, and when the molded case circuit breaker is overloaded or has a short-circuit fault, the protection mechanism drives the draw bar 15a to rotate, so that the draw bar positioning shoulder 150a is abutted and matched with the edge of the first side wall main body 110-0 a.

Preferably, the drawbar positioning shoulder 150a is positioned at one side of the rebuckling 16 a; the first side wall 110a comprises a first positioning surface 1100a arranged on the edge of the first side wall main body 110-0a and is in butt fit with the draw bar positioning shoulder 150 a; the axial direction of the traction rod 15a is perpendicular to the plane of the first sidewall body 110-0 a.

Preferably, the traction rod 15a is of an integrated structure, and comprises a first passive part, a second passive part and a third passive part which are sequentially arranged side by side and are respectively in driving fit with the three groups of protection mechanisms; the rebuckling 16a is arranged on the second driven portion, the draw bar positioning shoulder 150a is arranged on the second driven portion and located on one side of the rebuckling 16a, and a draw bar rotating shaft portion is respectively arranged between the first driven portion and the second driven portion and between the second driven portion and the third driven portion and is respectively connected with the first shell 10 of the breaker body 1 in a rotating mode.

Preferably, the rebuckling 16a includes a rebuckling connection part 163a, a rebuckling transition part 162a and a rebuckling first arm 160a with an L-shaped structure, the rebuckling connection part 163a is connected with the drawbar 15a, and two ends of the rebuckling transition part 162a are respectively connected with the rebuckling connection part 163a and the rebuckling first arm 160a in a bending manner; the refastening first arm 160a comprises a first arm connecting part 1601a and a first arm limiting part 1600a, and two ends of the first arm connecting part 1601a are respectively connected with the refastening transition part 162a and the first arm limiting part 1600a in a bending way;

the second side wall 111a includes a second side wall main body 111-0a of a flat plate structure, and when the molded case circuit breaker is switched on or switched off, the first arm limiting portion 1600a is in abutting fit with the edge of the second side wall main body 111-0 a.

Preferably, the second sidewall 111a includes a re-buckling limiting groove 1110a disposed at an edge of the second sidewall main body 111-0a, an opening of the re-buckling limiting groove 1110a faces the first arm limiting portion 1600a, and when the molded case circuit breaker is switched on or switched off, the first arm limiting portion 1600a is in abutting fit with a bottom wall of the re-buckling limiting groove 1110 a.

Preferably, the first positioning surface 1100a of the first sidewall 110a and the refastening limit groove 1110a are located at the same end of the bracket 11 a.

Preferably, the refastening 16a further includes a refastening second arm 161a, the refastening first arm 160a and the refastening second arm 161a are both bent toward the same side of the refastening transition portion 162a, and the refastening first arm 160a and the refastening second arm 161a are oppositely disposed at intervals; the refastening connection 163a is located on the other side of the refastening transition 162a and between the refastening first arm 160a and the refastening second arm 161 a.

Preferably, an installation space 11-1a is formed between the first side wall 110a and the second side wall 111a, and the secondary buckle 16a, the jump buckle 17a, the lock catch 19a, the upper link 12a and the lower link 13a are respectively arranged in the installation space 11-1 a; the movable contact mechanism 14a and the traction rod 15a are respectively positioned outside two ends of the bracket 11 a.

The utility model discloses moulded case circuit breaker, its operating device's traction lever 15a, through the cooperation of the border butt of the first side wall main part 110-0a of the direct dull and stereotyped structure of traction lever location shoulder 150a with first side wall 110a, and it is spacing with support 11a not to detain 16a again, has realized traction lever 15a and support 11 a's direct cooperation, is favorable to improving the uniformity of traction lever 15a rotation angle (being traction lever 15a is by pivoted angle behind the protection machanism drive).

Furthermore, the utility model discloses moulded case circuit breaker, its spacing portion 1600a of first arm of detaining 16a again, when moulded case circuit breaker combined floodgate or separating brake, with the cooperation of the border butt of second lateral wall 111 a's second lateral wall main part 111-0a, reduced the number of times of bending of detaining 16a again, be favorable to improving the uniformity of dropout stroke.

Drawings

Fig. 1 is a schematic view of an assembly structure of the molded case circuit breaker of the present invention, showing at least a positional relationship between a circuit breaker body and an electrically operated device;

fig. 2 is a schematic view of an assembly structure of the molded case circuit breaker of the present invention, in which a second case of the electric operating device is removed as compared with fig. 1;

fig. 3 is an enlarged schematic view of a portion C of fig. 2 according to the present invention;

fig. 4 is a schematic view of an assembly structure of the molded case circuit breaker of the present invention, showing at least an operating mechanism and an arc extinguishing system;

fig. 5 is a schematic structural view of the electric operating device of the present invention, at which the molded case circuit breaker is in a tripping state;

fig. 6 is a schematic structural view of the electric operating device of the present invention, in which the molded case circuit breaker is in an open state;

fig. 7 is a schematic structural view of the electric operating device of the present invention, at which the molded case circuit breaker is in a closing state;

fig. 8 is a schematic view of the assembly structure of the turntable, the main shaft and the cam assembly of the present invention;

fig. 9 is a schematic structural view of the slider of the present invention, showing at least the slider passive slot;

fig. 10 is a schematic structural view of the slider of the present invention, showing at least the slider drive slot;

fig. 11 is a schematic structural view of the spindle of the present invention;

fig. 12 is a schematic side view of the turntable of the present invention;

fig. 13 is an enlarged schematic view of a portion a of fig. 12 according to the present invention;

fig. 14 is another schematic structural view of the turntable of the present invention;

fig. 15 is an enlarged schematic view of a portion B of fig. 14 according to the present invention;

fig. 16 is a schematic structural diagram of the operating mechanism of the present invention;

fig. 17 is a schematic structural view of the operating mechanism of the present invention, at least showing the positional relationship of the bracket, the rebutch and the drawbar;

fig. 18 is a schematic structural view of the operating mechanism of the present invention, showing at least the upper link, the lower link, the bracket, the rocker, the drawbar, the rebuckle and the jump-lock;

fig. 19 is a schematic structural view of the operating mechanism of the present invention, showing at least the rocker, the bracket, the rebutch, the drawbar and the lower link;

fig. 20 is a schematic view of the structure of the drawbar and the bracket according to the present invention;

fig. 21 is a schematic view of the structure of the drawbar and rebuckling assembly of the present invention;

fig. 22 is a schematic structural view of a traction rod of the present invention;

fig. 23 is a schematic structural view of a first side wall of the present invention;

FIG. 24 is a schematic view of the structure of the present invention;

fig. 25 is a schematic structural view of a second side wall of the present invention;

fig. 26 is a schematic structural view of the arc extinguishing system of the present invention;

fig. 27 is an assembly structure diagram of the arc extinguishing base, the static contact and the small arc extinguishing chamber of the utility model;

fig. 28 is a schematic structural view of an arc extinguishing base according to the present invention;

fig. 29 is a schematic structural view of the static contact of the present invention;

figure 30 is a schematic view of the assembly structure of the arc-extinguishing chamber and the large arc-extinguishing chamber of the present invention;

fig. 31 is a schematic structural view of a first arc chute of the present invention;

fig. 32 is a schematic structural view of a small arc-extinguishing chamber of the present invention;

fig. 33 is a schematic structural view of a second arc chute of the present invention;

fig. 34 is a schematic structural diagram of the operating mechanism of the present invention, at least showing the connection relationship between the rebuckling and the bracket and the matching relationship between the rebuckling and the lock catch.

Detailed Description

The following describes the specific embodiments of the molded case circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 33. The molded case circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1, 2 and 4, the utility model discloses moulded case circuit breaker includes circuit breaker body 1 and electrically operated device 2, and circuit breaker body 1 includes operating device 1a, the moving contact 140b that links to each other with the drive of operating device 1a and the static contact 2b that uses with the cooperation of moving contact 140b, and electrically operated device 2 makes circuit breaker body 1 close a floodgate/separating brake through handle 10a and the cooperation of operating device 1a drive.

Preferably, as shown in fig. 2 to 15, the electric operation device 2 includes an electric motor, a gear set 2c, a main shaft 2e, a turntable 2d, a cam assembly and a slider 2 a; the turntable 2d is arranged on the main shaft 2e, is coaxial with the main shaft and synchronously rotates; the motor drives the main shaft 2e to rotate through the gear set 2c, the main shaft 2e drives the sliding block 2a to reciprocate through the gear set 2c, and the sliding block 2a drives the breaker body 1 to switch on/off through the handle 10a of the breaker body 1; the turntable 2d comprises a turntable shaft hole 21d, and the turntable shaft hole 21d is in limit fit with the spindle 2e to prevent the turntable 2d from rotating relative to the spindle 2 e; the turntable 2d is also in snap fit with the spindle 2e, and the turntable 2d is prevented from moving relative to the spindle 2e along the axial direction of the spindle 2 e. The clamping matching mode of the turntable 2d and the main shaft 2e is simple, and the turntable 2d and the main shaft 2e are convenient to assemble and disassemble.

Preferably, as shown in fig. 4 and 16-25, the molded case circuit breaker of the present invention further includes a moving contact mechanism 14a and a protection mechanism, wherein the operating mechanism includes a support 11a, a traction rod 15a, a rebuckling 16a, a skip buckle 17a, a latch 19a, an upper link 12a, a lower link 13a, and a rocker 18 a; the jump buckle 17a and the lock catch 19a are respectively arranged in the middle of the bracket 11a and matched with each other in a lock catch manner; one end of the upper connecting rod 12a is rotatably arranged on the jump buckle 17a, the other end of the upper connecting rod is hinged with one end of the lower connecting rod 13a, and the other end of the lower connecting rod 13a is in driving connection with the contact mechanism 14 a; one end of the rocker 18a is pivotally arranged on the bracket 11a, and the rocker 18a is in driving fit with the jump buckle 17 a; the traction rod 15a is rotatably arranged on one side of the bracket 11a and is in driving fit with the protection mechanism, the re-buckle 16a is arranged on the traction rod 15a and rotates synchronously with the traction rod, and the re-buckle 16a is in driving fit with the jump buckle 17 a; the draw bar 15a comprises a draw bar positioning shoulder 150a, the bracket 11a comprises a first side wall 110a and a second side wall 111a which are arranged at intervals, the first side wall 110a comprises a first side wall main body 110-0a with a flat plate structure, and when the molded case circuit breaker is overloaded or has a short-circuit fault, the protection mechanism drives the draw bar 15 to rotate, so that the draw bar positioning shoulder 150a is abutted and matched with the edge of the first side wall main body 110-0 a. The utility model discloses moulded case circuit breaker, its operating device's traction lever 15a, through the cooperation of the border butt of the first side wall main part 110-0a of the direct dull and stereotyped structure of traction lever location shoulder 150a with first side wall 110a, and it is spacing with support 11a not to detain 16a again, has realized traction lever 15a and support 11 a's direct cooperation, is favorable to improving the uniformity of traction lever 15a rotation angle (being traction lever 15a is by pivoted angle behind the protection machanism drive). Further, as shown in fig. 20, 21, 24 and 25, the rebuckling 16a includes a rebuckling connection part 163a, a rebuckling transition part 162a and a rebuckling first arm 160a, the rebuckling connection part 163a is connected to the drawbar 15a, and two ends of the rebuckling transition part 162a are respectively connected to the rebuckling connection part 163a and the rebuckling first arm 160a in a bending manner; the refastening first arm 160a comprises a first arm connecting part 1601a and a first arm limiting part 1600a, and two ends of the first arm connecting part 1601a are respectively connected with the refastening transition part 162a and the first arm limiting part 1600a in a bending way; the second side wall 111a includes a second side wall main body 111-0a of a flat plate structure, and when the molded case circuit breaker is switched on or switched off, the first arm limiting portion 1600a is in abutting fit with the edge of the second side wall main body 111-0 a. The utility model discloses moulded case circuit breaker, it detains 16 a's the spacing portion 1600a of first arm again, when moulded case circuit breaker combined floodgate or separating brake, with the cooperation of second lateral wall 111 a's second lateral wall main part 111-0 a's border butt, reduced the number of times of bending of detaining 16a again, be favorable to improving the uniformity of dropout stroke.

Preferably, as shown in fig. 26 and 27, the molded case circuit breaker of the present invention further includes an arc extinguishing system, the arc extinguishing system includes an arc extinguishing cover 16b, an arc extinguishing base 15b and an arc extinguishing chamber set, the arc extinguishing base 15b is disposed on the stationary contact 2 b; the static contact 2b comprises a first static contact plate 20b, a second static contact plate 21b and a static contact 22b, one end of the first static contact plate 20b is connected with one end of the second static contact plate 21b, the other end of the first static contact plate 20b is provided with the static contact 22b, the second static contact plate 21b and the first static contact plate 20b comprise parts opposite to the spacing layer, and the middle part of the part, opposite to the first static contact plate 20b, of the second static contact plate 21b is provided with a first avoidance hole 210b for the moving contact 140b to pass through; the arc extinguishing chamber group comprises a large arc extinguishing chamber 17b and a small arc extinguishing chamber 13b, the large arc extinguishing chamber 17b is arranged between an arc extinguishing cover 16b and a second static contact plate 21b, and the small arc extinguishing chamber 13b is arranged between the second static contact plate 21b and a first static contact plate 20 b. The utility model discloses moulded case circuit breaker, its first stationary contact plate 20 b's length is longer, and the electric current direction that flows through first stationary contact plate 20b and moving contact 140b is opposite, can be when moving contact 140a and static contact 2b separate, for moving contact 140a provide bigger electronic repulsion to make moving contact 140a and static contact 2b separate fast; the large arc extinguish chamber 17b is matched with the small arc extinguish chamber 13b, so that the stroke of the moving contact 140a is covered more completely, and the arc extinguish efficiency and the performance of an arc extinguish system are improved.

Preferably, as shown in fig. 27 and 29, the arc extinguishing system further includes an arc runner 14b fixed to the first stationary contact plate 20b, and the stationary contact 22b is located between the arc runner 14b and an end of the first stationary contact plate 20b connected to the second stationary contact plate 21 b. Further, as shown in fig. 27 and 29, one end of the small arc-separating plate 130b of the small arc-extinguishing chamber 13b is in snap fit with the arc striking corner 14b, and the small arc-extinguishing chamber 13b is located between the arc striking corner 14b and the second stationary contact plate 21 b. The arc striking angle 14b is beneficial to improving the speed of the electric arc entering the arc extinguishing chamber group and improving the arc extinguishing efficiency and performance of the arc extinguishing system.

The plastic case circuit breaker of the present invention will be further described with reference to the drawings and the specific embodiments.

As shown in fig. 1, 2 and 4, the molded case circuit breaker of the present invention includes a circuit breaker body 1 and an electric operation device 2; the circuit breaker body 1 comprises a first shell 10, an operating mechanism 1a, a movable contact mechanism 14a and a static contact 2b, wherein the operating mechanism 1a, the movable contact mechanism 14a and the static contact 2b are respectively arranged in the first shell 10; the moving contact mechanism 14a comprises a moving contact 140a matched with the fixed contact 2 b; the electric operating device 2 is in driving fit with the operating mechanism 1a, and the operating mechanism 1a drives the moving contact mechanism 14a to drive the moving contact 140a and the fixed contact 2b to be closed/opened, so that the circuit breaker body 1 is switched on/off.

Specifically, as shown in fig. 1, 2, 4, 16, the utility model discloses moulded case circuit breaker is a three-phase circuit breaker, including three circuit breaker pole circuits that set up side by side of group, each circuit breaker pole circuit all includes moving contact 10a and the static contact 2b that the cooperation was used, and each moving contact 140a shares same contact and supports and constitute moving contact mechanism 14a, and operating device 1a supports the drive with the contact and links to each other.

Preferably, as shown in fig. 2 to 8, the electric operation device 2 includes an electric motor (not shown), a gear set 2c, a main shaft 2e, a rotary table 2d, a cam assembly and a slider 2 a; the turntable 2d is arranged on the main shaft 2e, is coaxial with the main shaft and synchronously rotates; the motor drives the main shaft 2e to rotate through the gear set 2c, the main shaft 2e drives the sliding block 2a to reciprocate through the cam assembly, and the sliding block 2a drives the circuit breaker body 1 to switch on/off through the handle 10a of the operating mechanism 1 a.

Preferably, as shown in fig. 11 to 15, the turntable 2d includes a turntable shaft hole 21d, and the turntable shaft hole 21d is in limit fit with the spindle 2e to prevent the turntable 2d from rotating relative to the spindle 2 e; the turntable 2d is also in snap fit with the spindle 2e, and the turntable 2d is prevented from moving relative to the spindle 2e along the axial direction of the spindle 2 e.

Preferably, as shown in fig. 12 to 15, the turntable 2d includes at least one first limit stop 22d, and the first limit stop 22d is disposed at one radial end of the turntable shaft hole 21 d; the main shaft 2e comprises at least one first limiting groove 20e, the first limiting groove 20e is arranged at one radial end of the main shaft 2e, and the first limiting table 22d is matched with the first limiting groove 20e to prevent the rotary table 2d from rotating relative to the main shaft 2 e. Specifically, as shown in fig. 12 to 14, the turntable 2d includes two first limiting tables 22d respectively disposed at two radial ends of the turntable shaft hole 21 d; as shown in fig. 11, the main shaft 2e includes two first limiting grooves 20e, which are respectively disposed at one axial end of the main shaft 2e and located at two radial ends of the main shaft 2 e. It should be noted that the shape of the first limit stop 22d (limit stop of the arch structure) and the shape of the first limit groove 20e (limit groove of the arch structure) are not limited to those shown in fig. 11-15, as long as reliable limit of the turntable 2d and the spindle 2e can be achieved, and the turntable 2d is prevented from rotating relative to the spindle 2 e.

Preferably, as shown in fig. 12 to 15, the rotating disc 2d further includes a first clamping arm 23d, and the first clamping arm 23d includes a first connecting arm 230d and a first hook 231d disposed at one end of the first connecting arm 230 d; as shown in fig. 11, the main shaft 2e includes a first engaging groove 21e, and the first hook 231d is engaged with the first engaging groove 21e to prevent the rotary table 2d from moving relative to the main shaft 2e along the axial direction of the main shaft 2 e. Further, as shown in fig. 12 and 14, the turntable 2d includes a turntable main body 20d, a turntable shaft hole 21d is formed in the middle of the turntable main body 20d, one end of the first connecting arm 230d is connected to the peripheral side wall of the turntable shaft hole 21d, and the other end is provided with a first hook 231 d.

Preferably, as shown in fig. 12-15, the first position-limiting platform 22d has a first position-limiting platform slot 220d in the middle thereof opposite to the first latch arm 23 d.

Specifically, as shown in fig. 12 to 15, the turntable 2d includes two first clamp arms 23d respectively disposed at the outer sides of the radial two ends of the turntable shaft hole 21d, the axes of the two first clamp arms 23d and the symmetry axes of the two first limiting tables 22d are located on the same diameter of the turntable shaft hole 21d, a first limiting table slot 220d is disposed at the center line position of each first limiting table 22d, and the first limiting table slot 220d and the first clamp arms 23d are disposed in close proximity to each other one by one; as shown in fig. 11, the first engaging groove 21e is an annular groove disposed on the main shaft 2e, and facilitates the engagement of the first hook 231d with the first engaging groove 21 e. It should be noted that the first engaging groove 21e may also be two limiting grooves respectively disposed at two radial ends of the main shaft 2e, but the requirement on the machining accuracy is high, and therefore the first engaging groove 21e is preferably an annular groove.

Preferably, as shown in fig. 8, the rotary disk 2d and the cam assembly are respectively disposed at both axial ends of the main shaft 2 e.

Preferably, as shown in fig. 8, the cam assembly includes a cam turntable 2g and a cam 2h, one end of the cam turntable 2g is connected with the main shaft 2e, and the other end is provided with the cam 2 h; as shown in fig. 9 and 10, the slider 2a includes a slider driven groove 20a and a slider driving groove 21a respectively provided at both sides thereof, the cams 2h are provided in the slider driven groove 20a and respectively drivingly engaged with a pair of side walls of the slider driven groove 20a, and the slider driving groove 21a is drivingly engaged with the handle 10 a.

Preferably, as shown in fig. 5 to 8, the rotating disc 2d includes a status indicator for indicating an operating status (a closing status, an opening status, and a releasing status) of the molded case circuit breaker, and the status indicator is disposed on a side of the rotating disc 2d away from the cam assembly. Further, the state identifier comprises a text identifier, a color identifier and/or a symbol identifier.

Preferably, as shown in fig. 1 and 2, the electric operation device further includes a second housing 20 and a first mounting bracket 2i provided in the second housing 20; the first housing 20 includes a first viewing aperture 200; the first mounting rack 2i comprises a first assembly bin 20i, the rotary disc 2d is arranged in the first assembly bin 20i, and the first assembly bin 20i comprises a first assembly bin opening 200i oppositely matched with the first observation hole 200; the status indication of the rotating disk 2d is visible through the first assembly bin opening 200i and the first observation hole 200 in sequence.

Preferably, as shown in fig. 2 and 3, the electric operating device 2 further comprises a first microswitch 2f arranged on the first mounting bracket 2i, the first microswitch 2f comprising a first driving rod; the first assembly bin 20i further comprises a second assembly bin opening 21i formed in the circumferential side wall of the first assembly bin, and the circumferential side wall of the rotary disc 2dd is in driving fit with the first driving rod through the second assembly bin opening 21 i. Further, as shown in fig. 5-8 and 12, the turntable 2d includes a small arc sidewall 200d and a large arc sidewall 201d sequentially disposed on the circumference of the turntable 2d, and the radius of the small arc sidewall 200d is smaller than that of the large arc sidewall 201 d; when the small arc side wall 200d is opposite to the first driving rod, the first driving rod is released; when the large arc sidewall 201d faces the first driving rod, the first driving rod is pressed, and the first microswitch 2f is triggered. Specifically, as shown in fig. 5 and 7, when the molded case circuit breaker is in a closing state or a tripping state, the first driving rod is pressed, and the first micro switch 2f is triggered; as shown in fig. 6, when the molded case circuit breaker is in the open state, the first driving rod is released, and the first micro switch 2f is not triggered.

Preferably, as shown in fig. 2, the electric operating device 2 further includes a manual-automatic switching plate 2j and a second microswitch 2k, the manual-automatic switching plate 2j is slidably disposed on the upper side of the first assembly bin 20i, the second microswitch 2k is disposed on the first assembly bin 2i and located on one side of the manual-automatic switching plate 2j, and the second microswitch 2k is connected in series in a power supply circuit of the motor; the first assembly bin 20i is provided with a manual operation hole opposite to the main shaft 2e, when the manual-automatic switching plate 2j is located at an automatic position, the manual operation hole is shielded, the second microswitch 2k is released, and the second microswitch 2k is in a closed state; when the manual-automatic switching plate 2j slides to the manual position, the manual-automatic switching plate 2j leaves the manual operation hole, and the manual-automatic switching plate 2j abuts against the second driving rod of the second microswitch 2k, so that the second microswitch 2k is switched off. Further, as shown in fig. 1, a housing insertion hole correspondingly matched with the manual operation hole is formed in the second housing 20, and a user sequentially passes through the housing insertion hole and the manual operation hole by a handle to drive the main shaft 2e to rotate.

Preferably, as shown in fig. 16, the utility model discloses molded case circuit breaker, its circuit breaker body 1 still include with operating device 1a drive complex protection machanism, when molded case circuit breaker appears transshipping or short-circuit fault, protection machanism drive operating device 1a makes molded case circuit breaker separating brake or tripping operation. Further, as shown in fig. 16, the protection mechanism includes a short-circuit protection mechanism and an overload protection mechanism, the short-circuit protection mechanism is an electromagnetic trip mechanism, and the overload protection mechanism includes a bimetal.

Preferably, as shown in fig. 16-19, the operating mechanism 1a further includes a bracket 11a, a traction rod 15a, a re-buckle 16a, a jump buckle 17a, a latch 19a, an upper link 12a, a lower link 13a, and a rocker 18 a; the jump buckle 17a and the lock catch 19a are respectively arranged in the middle of the bracket 11a and matched with each other in a lock catch manner; one end of the upper connecting rod 12a is rotatably arranged on the jump buckle 17a, the other end of the upper connecting rod is hinged with one end of the lower connecting rod 13a, and the other end of the lower connecting rod 13a is in driving connection with the contact mechanism 14 a; one end of the rocker 18a is pivotally arranged on the bracket 11a, the rocker 18a is in driving fit with the jump buckle 17a, and the handle 10 is connected with the rocker 18 a; the traction rod 15a is rotatably arranged on one side of the bracket 11a and is in driving fit with the protection mechanism, the relocking 16a is arranged on the traction rod 15a and rotates synchronously with the traction rod, and the relocking 16a is in driving fit with the lock catch 19 a. Further, as shown in fig. 16-20, an installation space 11-1a is formed between the first side wall 110a and the second side wall 111a, and the secondary buckle 16a, the jump buckle 17a, the lock catch 19a, the upper link 12a, and the lower link 13a are respectively disposed in the installation space 11-1 a; the moving contact mechanism 14a and the traction rod 15a are respectively positioned at the outer sides of two ends of the bracket 11 a; the rocker arm 18a is of a U-shaped structure, and includes a first leg and a second leg which are oppositely disposed at an interval, and free ends of the first leg and the second leg are respectively disposed at two sides of the first side wall 110a and the second side wall 111a, and are respectively rotatably connected to the first side wall 110a and the second side wall 111 a.

Preferably, as shown in fig. 19 to 23, the pull rod 15a includes a pull rod positioning shoulder 150a, the bracket 11a includes a first side wall 110a and a second side wall 111a that are disposed at an interval, the first side wall 110a includes a first side wall main body 110-0a having a flat plate structure, and when the molded case circuit breaker has an overload or short-circuit fault, the protection mechanism drives the pull rod 15a to rotate, so that the pull rod positioning shoulder 150a is abutted against and matched with an edge of the first side wall main body 110-0 a. The traction rod 15a drives the rebuckling 16a when rotating, the limit of the rebuckling 16a on the locking buckle 19a is released, and the tripping buckle 17a and the locking buckle 19a are released from locking and matching, so that the circuit breaker is tripped; referring to fig. 34, after tripping the circuit breaker, the sharp corner of the detainer 16a enters the slot 190a of the catch 19a (the slot 190a is provided on the side wall of the catch 19a facing the sharp corner of the detainer 16 a). Further, as shown in fig. 19-22, the drawbar locating shoulder 150a is located on one side of the rebuckling 16 a; the first side wall 110a comprises a first positioning surface 1100a arranged on the edge of the first side wall main body 110-0a and is in butt fit with the draw bar positioning shoulder 150 a; the axial direction of the traction rod 15a is perpendicular to the plane of the first sidewall body 110-0 a. Specifically, as shown in fig. 20-22, the drawbar locating shoulder 150a is a section of transverse rib that extends parallel to the axial direction of the drawbar 15 a.

Preferably, as shown in fig. 21 and 22, the traction rod 15a is an integrated structure, and includes a first passive part, a second passive part and a third passive part which are sequentially arranged side by side, and are respectively in driving fit with the three groups of protection mechanisms; the rebuckling 16a is arranged on the second driven portion, the draw bar positioning shoulder 150a is arranged on the second driven portion and located on one side of the rebuckling 16a, and a draw bar rotating shaft portion is respectively arranged between the first driven portion and the second driven portion and between the second driven portion and the third driven portion and is respectively connected with the first shell 10 of the breaker body in a rotating mode.

Preferably, as shown in fig. 20, 21 and 24, the rebuckling 16a includes a rebuckling connection part 163a, a rebuckling transition part 162a and a rebuckling first arm 160a with an L-shaped structure, the rebuckling connection part 163a is connected to the drawbar 15a, and two ends of the rebuckling transition part 162a are respectively connected to the rebuckling connection part 163a and the rebuckling first arm 160a in a bending manner; the refastening first arm 160a comprises a first arm connecting part 1601a and a first arm limiting part 1600a, and two ends of the first arm connecting arm 1601a are respectively connected with the refastening transition part 162a and the first arm limiting part 1600a in a bending way; as shown in fig. 20 and 25, the second side wall 111a includes a second side wall main body 111-0a having a flat plate structure, and when the molded case circuit breaker is switched on or switched off, the first arm-limiting portion 1600a is in abutting engagement with an edge of the second side wall main body 111-0 a. Further, as shown in fig. 20 and 25, the second side wall 111a includes a re-buckling limiting groove 1110a disposed at an edge of the second side wall main body 111-0a, an opening of the re-buckling limiting groove 1110a faces the first arm limiting portion 1600a, and when the molded case circuit breaker is switched on or switched off, the first arm limiting portion 1600a is in abutting fit with a bottom wall of the re-buckling limiting groove 1110 a.

Preferably, as shown in fig. 21 and 24, the refastening 16a further includes a refastening second arm 161a, the refastening first arm 160a and the refastening second arm 161a are both bent toward the same side of the refastening transition portion 162a, and the refastening first arm 160a and the refastening second arm 161a are oppositely disposed at intervals; the refastening connection 163a is located on the other side of the refastening transition 162a and between the refastening first arm 160a and the refastening second arm 161 a. Further, as shown in fig. 24 and 34, the refastening second arm 161a is pointed.

Preferably, as shown in fig. 34, the rebutch 16a and the traction rod 15a are pivotally disposed on the bracket 11a through a rebutch rotating shaft 16-15 a.

Preferably, as shown in fig. 20, the first positioning surface 1100a and the refastening limit groove 1110a are located at the same end of the bracket 11 a. Specifically, as shown in fig. 20, the first positioning surface 1100a is located at the upper portion of the left end of the first sidewall body 110-0a, and the second retaining groove 1110a is located at the middle portion of the left end of the second sidewall body 111-0 a.

Preferably, as shown in fig. 4, 16 and 26, the molded case circuit breaker of the present invention further includes an arc extinguishing system in the breaker body 1.

Preferably, as shown in fig. 26, the arc extinguishing system includes an arc extinguishing cover 16b, an arc extinguishing base 15b and an arc extinguishing chamber group, and the arc extinguishing base 15b is disposed on the stationary contact 2 b; as shown in fig. 29, the fixed contact 2b includes a first fixed contact plate 20b, a second fixed contact plate 21b and a fixed contact 22b, one end of the first fixed contact plate 20b is connected to one end of the second fixed contact plate 21b, the other end of the first fixed contact plate 20b is provided with the fixed contact 22b, and a first avoidance hole 210b through which the movable contact 140b passes is formed in the middle of a portion of the second fixed contact plate 21b opposite to the first fixed contact plate 20 b; the arc extinguishing chamber group comprises a large arc extinguishing chamber 17b and a small arc extinguishing chamber 13b, the large arc extinguishing chamber 17b is arranged between an arc extinguishing cover 16b and a second static contact plate 21b, and the small arc extinguishing chamber 13b is arranged between the second static contact plate 21b and a first static contact plate 20 b.

Preferably, as shown in fig. 26, 27 and 29, the arc extinguishing system further comprises an arc striking horn 14b fixedly arranged on the first stationary contact plate 20b, and the stationary contact 22b is positioned between the arc striking horn 14b and the end of the first stationary contact plate 20b connected with the second stationary contact plate 21 b; the small arc extinguishing chamber 13b is arranged between the arc ignition horn 14b and the second stationary contact plate 21 b.

Specifically, as shown in the direction of fig. 26, the right end of the first stationary contact plate 20b is connected to the left end of the second stationary contact plate 21a, the left end of the first stationary contact plate 20b is provided with a stationary contact 22b, the arc striking angle 14b is arranged at the left end of the first stationary contact plate 20b and is located on the left side of the stationary contact 22b, and the second stationary contact plate 21b is located above the first stationary contact plate 20 b; big explosion chamber 17b and little explosion chamber 13b set up respectively in the upside and the downside of second stationary contact board 21b, and arc extinguishing chamber 16b sets up in big explosion chamber 17b top.

Preferably, as shown in fig. 30 and 31, the large arc-extinguishing chamber 17b includes two large arc-isolating plates 170b arranged oppositely and a plurality of first arc-extinguishing bars 171b arranged between the two large arc-isolating plates 170b at intervals side by side. Further, as shown in fig. 31, the first arc-extinguishing grid 171b includes a first grid body 1710b, a first large slot 1711b disposed at one end of the first grid body 1710b, and a first slit 1712b disposed in the middle of the bottom wall of the first large slot 1711b, and two top corners of the other end of the first grid body 1710b are respectively provided with an arc notch.

Preferably, as shown in fig. 26 and 30, the two ends of the large arc-isolating plate 170b are respectively and limitedly matched with the arc-extinguishing cover 16b and the arc-extinguishing base 15 b. Specifically, as shown in the direction of fig. 26, the upper end and the lower end of the large arc-isolating plate 170b are respectively in limit fit with the arc-extinguishing chamber 16b and the arc-extinguishing base 15b, so that reliable assembly of the large arc-extinguishing chamber 17b is ensured, and the arc-extinguishing chamber 16b is matched with the large arc-extinguishing chamber 17b to form a semi-closed space, which is beneficial to enhancing the arc-extinguishing effect. Preferably, as shown in fig. 26, 27 and 32, the small arc-extinguishing chamber 13b includes two small arc-separating plates 130b arranged oppositely and a plurality of second arc-extinguishing grids 131b arranged between the two small arc-separating plates 130b at intervals side by side. Further, the second arc chute 131b includes a second chute 1310b, a second large slot 1311b disposed at one end of the second chute 1310b, and a second slit 1312b disposed in the middle of the bottom wall of the second large slot 1311b, wherein two corners of the other end of the second chute 1310b are provided with a chamfer structure, and an arc protrusion is disposed in the middle of the end.

Preferably, as shown in fig. 26-27, one end of the small arc separating plate 130b is snap-fitted with the arc striking angle 14 b. Specifically, as shown in fig. 32, a small arc baffle clamping groove 1300b is formed at one end of the small arc baffle 130b, and the arc striking angle 14b is clamped in the small arc baffle clamping groove 1300 b. Further, one end of the connecting portion 154b of the arc-extinguishing base 15b is provided with a small arc-extinguishing chamber limiting pin 153b, and the small arc-extinguishing chamber limiting pin 153b is in limiting fit with one end, close to the second arc-extinguishing grid piece 131b of the second stationary contact plate 21b, of the second arc-extinguishing grid piece 131b at the outlet of the small arc-extinguishing chamber 13 b. Specifically, one end of the connecting portion 154b is provided with two small arc-extinguishing chamber limiting pins 153b, and the two small arc-extinguishing chamber limiting pins 153b are located on two sides of the arc-shaped protrusion of the second arc-extinguishing grid piece 131b on the uppermost layer and are in limiting fit with the second arc-extinguishing grid piece 131 b.

Specifically, as shown in fig. 26 and 27, the lower end of the small arc-separating plate 130b is in clamping fit with the arc striking angle 14b through a small arc-separating plate clamping groove 1300b, and the left end of the second arc-extinguishing grid piece 131b on the upper portion of the small arc-extinguishing chamber 13b is in limit fit with the small arc-extinguishing chamber limit pin 153 b.

Preferably, as shown in fig. 26 to 28, the arc extinguishing base 15b includes a base portion 152b, two reflecting plate portions 151b and a connecting portion 154b, the base portion 152b is disposed at one end of the first stationary contact plate 20b connected to the second stationary contact plate 21b, the two reflecting plate portions 151b are disposed at an interval and have one ends respectively connected to the base portion 152b, the other ends of the two reflecting plate portions 151b are respectively opposite to the arc extinguishing chamber 16b, a base slit 150b for the moving contact 140a to pass through is disposed between the two reflecting plate portions 151b, and the base slit 150b is respectively opposite to the entrance of the large arc extinguishing chamber 17b and the entrance of the small arc extinguishing chamber 13 b; one end of the connecting portion 154b is connected to the two reflecting plate portions 151b, a second slit is formed in the middle of the connecting portion 154b for the movable contact 14a to pass through and communicate with the base slit 150b, and the connecting portion 154b covers the second stationary contact plate 21 b. Further, as shown in figure 26, the base slot 150b tapers in width from its end adjacent the arc chute 16b to the end of the base slot 150b adjacent the base portion 152 b. Arc extinguishing base 15b and big explosion chamber 17b and the cooperation of little explosion chamber 13b guarantee that most electric arcs all get into in the explosion chamber and are extinguished, and can not follow the escape in arc extinguishing base 15b, are favorable to improving arc extinguishing system's arc extinguishing performance.

Preferably, as shown in fig. 27 and 28, the reflecting plate portion 151b includes a reflecting plate pillar 1510b, an upper reflecting plate 1511b and a lower reflecting plate 1512b, wherein one end of the reflecting plate pillar 1510b is connected to the base portion 152b, and the other end is oppositely fitted to the arc chute 16 b; the upper reflection plate 1511b and the lower reflection plate 1512b are respectively connected to the reflection plate columns 1510b, the upper reflection plate 1511b and the lower reflection plate 1512b are arranged side by side along the axial direction of the reflection plate columns 1510b and are respectively located at two sides of the connecting portion 154b, and the upper reflection plate 1511b and the lower reflection plate 1512b are both located between the reflection plate columns 1510b and the connecting portion 154 b; the two upper reflecting plates 1511b are positioned between the two large arc-isolating plates 170b, and the slot between the two large arc-isolating plates is in opposite fit with the first large slot 1711b of the first arc-extinguishing grid 171 b; the two lower reflection plates 1512b are located between the two small arc-separating plates 130b, and the slot between the two small arc-separating plates is in opposite fit with the second large slot 1311b of the second arc-extinguishing grid 131 b.

Preferably, as shown in fig. 26, the molded case circuit breaker further includes a fixed contact wire holder engaged with the other end of the second fixed contact plate 21b, a front shield 11b is disposed between the fixed contact wire holder and the large arc-extinguishing chamber 17b, and the front shield 11b is provided with a plurality of shield exhaust holes, so that when the circuit breaker body performs arc-extinguishing in a breaking manner, an exhaust path is smooth.

Preferably, as shown in fig. 29, the static contact 2b is an embodiment of: the static contact 2b comprises a first static contact plate 20b, a second static contact plate 21b and a static contact 22 b; the first stationary contact plate 20b is of a chevron structure and comprises a first stationary contact plate main body and two first stationary contact plate connecting arms positioned on two sides of the first stationary contact plate main body; the second static contact plate 21b comprises a second static contact plate wiring portion and two second static contact plate connecting arms arranged at one end of the second static contact plate wiring portion at intervals, a first avoiding hole 210b is formed between the two second static contact plate connecting arms, the two second static contact plate connecting arms are respectively connected with the two first static contact plate connecting arms, each second static contact plate connecting arm comprises a vertical portion of a connecting arm and a horizontal portion of the connecting arm, two ends of the vertical portion of the connecting arm are respectively bent and connected with the horizontal portion of the connecting arm and the first static contact plate connecting arms, the second static contact plate wiring portion and the horizontal arm of the connecting arm are arranged side by side at intervals with the first static contact plates, and the second static contact plate wiring portion is matched with the static contact wiring seat.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (8)

1. A molded case circuit breaker comprises a circuit breaker body (1), wherein the circuit breaker body (1) comprises an operating mechanism, a moving contact mechanism (14a) and a protection mechanism, and the operating mechanism comprises a bracket (11a), a traction rod (15a), a re-buckle (16a), a jump buckle (17a), a lock catch (19a), an upper connecting rod (12a), a lower connecting rod (13a) and a rocker arm (18 a); the jump buckle (17a) and the lock catch (19a) are respectively arranged in the middle of the bracket (11a) and matched with each other in a lock catch manner; one end of the upper connecting rod (12a) is rotatably arranged on the jump buckle (17a), the other end of the upper connecting rod is hinged with one end of the lower connecting rod (13a), and the other end of the lower connecting rod (13a) is in driving connection with the moving contact mechanism (14 a); one end of the rocker arm (18a) is pivotally arranged on the bracket (11a), and the rocker arm (18a) is in driving fit with the jump buckle (17 a); the traction rod (15a) is rotatably arranged on one side of the bracket (11a) and is in driving fit with the protection mechanism, the re-buckle (16a) is arranged on the traction rod (15a) and rotates synchronously with the traction rod, and the re-buckle (16a) is in driving fit with the lock catch (19 a); the method is characterized in that: the draw bar (15a) comprises a draw bar positioning shoulder (150a), the bracket (11a) comprises a first side wall (110a) and a second side wall (111a) which are arranged at intervals oppositely, the first side wall (110a) comprises a first side wall main body (110-0a) of a flat plate structure, and when the molded case circuit breaker is overloaded or has a short-circuit fault, the protection mechanism drives the draw bar (15a) to rotate, so that the draw bar positioning shoulder (150a) is abutted and matched with the edge of the first side wall main body (110-0 a).

2. The molded case circuit breaker according to claim 1, wherein: the draw bar positioning shoulder (150a) is positioned at one side of the rebuckling (16 a); the first side wall (110a) comprises a first positioning surface (1100a) arranged on the edge of the first side wall main body (110-0a) and is in butt fit with the traction rod positioning shoulder (150 a); the axial direction of the traction rod (15a) is perpendicular to the plane of the first side wall main body (110-0 a).

3. A molded case circuit breaker according to claim 1 or 2, characterized in that: the traction rod (15a) is of an integrated structure, comprises a first driven part, a second driven part and a third driven part which are sequentially arranged side by side and is respectively matched with the three groups of protection mechanisms in a driving way; the relocking device is characterized in that the relocking (16a) is arranged on the second driven part, the draw bar positioning shoulder (150a) is arranged on the second driven part and located on one side of the relocking (16a), and a draw bar rotating shaft part is respectively arranged between the first driven part and the second driven part and between the second driven part and the third driven part and is respectively connected with the first shell (10) of the breaker body (1) in a rotating mode.

4. The molded case circuit breaker according to claim 1, wherein: the rebuckling (16a) comprises a rebuckling connecting part (163a), a rebuckling transition part (162a) and a rebuckling first arm (160a) of an L-shaped structure, the rebuckling connecting part (163a) is connected with the traction rod (15a), and two ends of the rebuckling transition part (162a) are respectively connected with the rebuckling connecting part (163a) and the rebuckling first arm (160a) in a bending mode; the refastening first arm (160a) comprises a first arm connecting part (1601a) and a first arm limiting part (1600a), and two ends of the first arm connecting part (1601a) are respectively connected with the refastening transition part (162a) and the first arm limiting part (1600a) in a bending manner;

the second side wall (111a) comprises a second side wall main body (111-0a) of a flat plate structure, and when the molded case circuit breaker is switched on or switched off, the first arm limiting part (1600a) is in butt joint with the edge of the second side wall main body (111-0 a).

5. The molded case circuit breaker according to claim 4, wherein: the second side wall (111a) comprises a re-buckling limiting groove (1110a) arranged at the edge of the second side wall main body (111-0a), an opening of the re-buckling limiting groove (1110a) faces to the first arm limiting part (1600a), and when the molded case circuit breaker is switched on or switched off, the first arm limiting part (1600a) is in butt joint with the bottom wall of the re-buckling limiting groove (1110 a).

6. A molded case circuit breaker according to claim 5, wherein the first positioning surface (1100a) of the first sidewall (110a) and the rebuckling prevention groove (1110a) are located at the same end of the cradle (11 a).

7. The molded case circuit breaker according to claim 4, wherein: the rebuckling (16a) further comprises a rebuckling second arm (161a), the rebuckling first arm (160a) and the rebuckling second arm (161a) are both bent towards the same side of the rebuckling transition part (162a), and the rebuckling first arm (160a) and the rebuckling second arm (161a) are arranged at an interval relatively; the refastening connection (163a) is located on the other side of the refastening transition (162a) and between the refastening first arm (160a) and the refastening second arm (161 a).

8. The molded case circuit breaker according to claim 1, wherein: an installation space (11-1a) is formed between the first side wall (110a) and the second side wall (111a), and the secondary buckle (16a), the jump buckle (17a), the lock catch (19a), the upper connecting rod (12a) and the lower connecting rod (13a) are respectively arranged in the installation space (11-1 a); the moving contact mechanism (14a) and the traction rod (15a) are respectively positioned at the outer sides of two ends of the bracket (11 a).

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