CN210429704U - Frame circuit breaker - Google Patents

Abstract

A frame circuit breaker comprises a drawer seat, a breaker body and a secondary circuit device, wherein the breaker body and the secondary circuit device are slidably arranged in the drawer seat, the drawer seat comprises two side plates which are oppositely arranged, a top cover connected between the top ends of the two side plates and a base connected between the bottom ends of the two side plates, a static contact mechanism of the secondary circuit device is arranged on one side of a cross beam on the inner side of the drawer seat and is positioned between the two side plates, the other side of the crossbeam is an inner cover plate of the top cover, one side of the crossbeam far away from the top cover is provided with a screw, the side of the crossbeam is provided with a screw hole connected with the screw, a gap is reserved between the position of the inner cover plate corresponding to the screw hole and the crossbeam, the screw is connected with the static contact mechanism, the screw penetrates through the screw hole and extends between the other side of the crossbeam and the inner cover plate of the top cover, a nut for connecting the screw is not required to be arranged between the other side of the crossbeam and the inner cover plate of the top cover, and the loss of the static contact mechanism caused by secondary installation and the loss of the.

Description

Frame circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus field especially relates to a frame circuit breaker.

Background

The frame circuit breaker is an important component of the electrical appliance industry, and when an electrical circuit works normally, the circuit breaker can achieve the functions of power failure, power supply, circuit conversion and the like by closing and opening the circuit; when the electric circuit breaks down, the frame circuit breaker can automatically cut off the circuit, so that the safety of workers and the normal operation of equipment are prevented from being endangered due to the circuit failure.

The conventional frame circuit breaker usually fixes a static contact mechanism of a secondary circuit device on a beam in a screw and nut mode, but because the frame circuit breaker is compact in structure, the difficulty of screwing the nut is very high when the static contact mechanism is installed and disassembled, the nut needs to be exposed by disassembling the beam from a drawer seat, the nut can be screwed, after the static contact mechanism is installed and disassembled, the beam is assembled back to the drawer seat, the beam is disassembled from the drawer seat and then is assembled back, the time and labor are wasted, the service life of the beam is prolonged, and the performance of the frame circuit breaker can be influenced.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a simple structure, high frame circuit breaker of reliability.

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

a frame circuit breaker comprises a drawer base, a circuit breaker body and a secondary circuit device, wherein the circuit breaker body and the secondary circuit device are slidably mounted in the drawer base, the drawer base comprises two side plates which are oppositely arranged, a top cover connected between the top ends of the two side plates and a base connected between the bottom ends of the two side plates, the top cover comprises a top cover plate, an inner cover plate and an outer cover plate which are vertically arranged between the two side plates, the inner cover plate and the outer cover plate are oppositely arranged on the side edges of the two sides of the top cover plate, the drawer base further comprises a cross beam which is vertically connected between the top ends of the two side plates, a static contact mechanism of the secondary circuit device is mounted on one side of the cross beam and positioned between the two side plates, the inner cover plate of the top cover is arranged on the other side of the cross beam, a screw hole connected with a screw is arranged on one side of the cross beam, the screw is connected with the static contact mechanism and extends between the other side of the cross beam and the inner cover plate of the top cover through the screw hole.

Preferably, the static contact mechanism comprises two supports and a plurality of static terminals arranged between the two supports, the two supports are respectively provided with a limiting hole matched with a screw, the screw penetrates through the limiting hole, one end of the screw is in limiting fit with one side of the connecting plate, and the other end of the screw is connected with the screw hole in the cross beam.

Preferably, the limiting hole in at least one bracket is long-strip-shaped, and the length direction of the limiting hole is parallel to the length direction of the cross beam.

Preferably, the cross beam is U-shaped, and the cross beam comprises two side arms arranged oppositely and a cross arm connected between the side edges of one side of the two side arms, the two side arms are respectively positioned on one side of the cross arm away from the top cover, the two side arms are respectively connected with the side plates on the two sides, screw holes are arranged on the cross arm, and the static contact mechanism is arranged between the two side arms and connected with the cross arm.

Preferably, a top arm is arranged on the side edge of the top side of the cross arm, the top arm and the two side walls are located on the same side of the cross arm, and the static contact mechanism is arranged between the two side arms and located below the top arm.

Preferably, the top cover comprises a top cover plate, side cover plates oppositely arranged on the side edges of the two sides of the top cover plate, an inner cover plate and an outer cover plate oppositely arranged on the side edges of the other two sides of the top cover plate, the inner cover plate is oppositely arranged with the cross beam, and the side cover plates are provided with connecting holes connected with the side plates; the inner cover plate comprises a first inner cover plate and a third inner cover plate which are arranged in parallel with the cross beam respectively, and a second inner cover plate connected between the first inner cover plate and the third inner cover plate, the third inner cover plate is correspondingly arranged on one side of the screw hole in the cross beam, the third inner cover plate is arranged on one side of the first inner cover plate far away from the cross beam, and a space for avoiding screws is formed between the third inner cover plate and the second inner cover plate.

Preferably, a nut is welded on one side, far away from the static contact mechanism, of the cross beam, and a screw penetrates through a screw hole to be connected with the nut.

Preferably, the support is L-shaped, the support comprises a connecting plate and clamping plates which are vertically connected, the plurality of static terminals are fixed between the clamping plates of the two supports, the connecting plates of the two supports are respectively arranged opposite to the cross beam, limiting holes are respectively formed in the connecting plates of the two supports, and the heights of the limiting holes in the connecting plates of the two supports are different.

Preferably, the secondary circuit device comprises a static contact mechanism and a dynamic contact mechanism which are oppositely arranged, the static contact mechanism is arranged on the beam, and the dynamic contact mechanism is arranged on the breaker body; the side of every quiet terminal of quiet contact mechanism is equipped with two stationary contacts respectively, move contact mechanism include with set up the movable contact bridge between two stationary contacts, the circuit breaker body can drive the both ends of movable contact bridge respectively with two stationary contacts contact when moving to the quiet terminal direction, make and form the route between two stationary contacts.

Preferably, be equipped with the drive mechanism with this body coupling of circuit breaker on the base, drive mechanism includes pushing mechanism and rotary mechanism, pushing mechanism includes the worm, the cover is on the worm with worm screw-thread fit's push pedal, the slide of being connected with the push pedal, rotary mechanism includes the swivel mount, pivot mounting is in the pivot on the swivel mount and set up in the pivot with this body coupling of circuit breaker cantilever and with slide complex gear, be equipped with a plurality ofly on the slide with gear engagement complex draw-in groove, the worm drives the push pedal drive slide through the screw thread when rotating and removes, it rotates to drive the pivot through draw-in groove drive gear drive pivot when the slide removes, it removes to drive the circuit breaker body through the cantilever when the.

The utility model discloses a frame circuit breaker, quiet contact mechanism passes through the screw hole connection on screw and the crossbeam side, need not set up the nut of connecting screw between the opposite side of crossbeam and the inner shroud of overhead guard, can avoid setting up the nut that is used for connecting screw in the space between crossbeam and overhead guard, thereby just also need not take off the crossbeam from the curb plate in order to expose the nut when dismantling and installing quiet contact mechanism, not only can effectively improve the efficiency of assembly and maintenance, avoid the position that secondary installation leads to quiet contact mechanism to change, guarantee the reliability of quiet contact mechanism, and can also reduce the distance between the opposite side of crossbeam and the overhead guard, make the structure compacter, the volume is littleer. In addition, the service life of the cross beam can be prevented from being lost in the process of repeated installation and disassembly.

In addition, through set up the spacing hole that length direction is parallel with the length direction of crossbeam on the connecting plate, the support can be in order to adjust the mounted position along the length direction in spacing hole when the installation, uses more in a flexible way, and the installation is also more convenient.

Drawings

Fig. 1 is a schematic structural diagram of a frame circuit breaker according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a drawer base according to an embodiment of the present invention;

fig. 3 is another schematic structural view of a drawer base according to an embodiment of the present invention;

FIG. 4 is a schematic view of the stationary contact mechanism, the cross beam and the top cover of the embodiment of the present invention respectively cooperating with the side plates;

fig. 5 is a first embodiment of a stationary contact mechanism according to an embodiment of the present invention;

fig. 6 is a second embodiment of the stationary contact mechanism according to the embodiment of the present invention;

FIG. 7 is a schematic structural view of a limiting hole according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a cross beam according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a transmission mechanism according to an embodiment of the present invention;

fig. 10 is another schematic structural view of the transmission mechanism according to the embodiment of the present invention;

fig. 11 is a schematic structural diagram of a transmission mechanism according to an embodiment of the present invention.

Detailed Description

The following describes the frame circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 8. The frame circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1-5, the frame circuit breaker of the present invention includes a drawer base 1, a breaker body 2 slidably mounted in the drawer base 1, and a secondary circuit device, wherein the drawer base 1 includes two side plates 11 disposed opposite to each other, a top cover 14 connected between top ends of the two side plates 11, and a base 13 connected between bottom ends of the two side plates 11, the top cover 14 includes a top cover plate 141, an inner cover plate 144 and an outer cover plate 145 vertically disposed between the two side plates 11, the inner cover plate 144 and the outer cover plate 145 are disposed opposite to each other on both side edges of the top cover plate 141, the drawer base 1 further includes a beam 12 vertically connected between top ends of the two side plates 11, a static contact mechanism 3 of the secondary circuit device is mounted on one side of the beam 12 and located between the two side plates 11, the inner cover plate 144 of the top cover 14 is disposed on the other side of the beam 12, a screw 30 is disposed on one side of the beam, the side surface of the cross beam 12 is provided with a screw hole 120 connected with the screw 30, a gap is left between the position of the inner cover plate 144 corresponding to the screw hole 120 and the cross beam 12, one end of the screw 30 is connected with the static contact mechanism 3, and the other end of the screw 30 passes through the screw hole 120 and extends between the other side of the cross beam 12 and the inner cover plate 144 of the top cover 14.

The utility model discloses a frame circuit breaker, quiet contact mechanism 3 passes through screw 30 and is connected with screw hole 120 on the crossbeam 12 side, need not set up the nut of connecting screw 30 between the opposite side of crossbeam 12 and dome 14, can avoid setting up the nut that is used for connecting screw 30 in the space between crossbeam 12 and dome 14, thereby just also need not take off crossbeam 12 from curb plate 11 in order to expose the nut when dismantling and installing quiet contact mechanism 3, not only can effectively improve the efficiency of assembly and maintenance, avoid the position that secondary installation leads to quiet contact mechanism 3 to change, guarantee the reliability of quiet contact mechanism 3, and can also reduce the distance between the opposite side of crossbeam 12 and the dome 14, make the structure compacter, the volume is littleer. In addition, the service life of the cross beam 12 can be prevented from being lost during repeated mounting and dismounting.

As shown in fig. 6, as a second embodiment of the cross beam 12, the screw hole 120 on the side of the cross beam 12 is not provided with a thread, one side of the cross beam 12 away from the stationary contact mechanism 3 is welded with a nut, and the screw 30 passes through the screw hole 120 and is connected with the nut, which all belong to the protection scope of the present invention.

As shown in fig. 1-2 and 9-10, a transmission mechanism 15 connected to the circuit breaker body 2 is disposed on the base 13, the secondary circuit device includes a stationary contact mechanism 3 and a movable contact mechanism (not shown in the figure) disposed oppositely, the stationary contact mechanism 3 is mounted on the beam 12, the movable contact mechanism is mounted on the circuit breaker body 2, the transmission mechanism 15 can drive the circuit breaker body 2 to move, and the circuit breaker body 2 can drive the movable contact mechanism to approach and leave away from the stationary contact mechanism 3.

The transmission mechanism 15 includes a pushing mechanism and a rotating mechanism, the pushing mechanism pushes the rotating mechanism to rotate, and the rotating mechanism drives the circuit breaker to move when rotating. The pushing mechanism comprises a worm 151, a push plate 152 sleeved on the worm 151 and in threaded fit with the worm 151, and a sliding plate 153 connected with the push plate 152, the rotating mechanism comprises a rotating frame 159, a rotating shaft 154 pivotally mounted on the rotating frame 159, a cantilever 156 arranged on the rotating shaft 154 and connected with the circuit breaker body 2, and a gear 157 matched with the sliding plate 153, and a plurality of clamping grooves 158 in meshing fit with the gear 157 are arranged on the sliding plate 153. The worm 151 drives the push plate 152 to drive the sliding plate 153 to move through the screw thread when rotating, the sliding plate 153 drives the rotating shaft 154 to rotate through the clamping groove 158 and the driving gear 157 when moving, and the rotating shaft 154 drives the circuit breaker body 2 to move through the cantilever 156 when rotating.

The two sides of the circuit breaker body 1 are usually provided with a plurality of working positions, such as a separating position, a testing position and a connecting position, when the circuit breaker body 2 needs to be moved, the worm 151 is rotated through the handle to drive the circuit breaker body 1 to move between the working positions, and when the circuit breaker body 1 moves, the movable contact mechanism can be driven to contact with and separate from the static contact mechanism 3 so as to switch on and off the secondary wiring device.

As shown in fig. 5, the stationary contact mechanism 3 includes two brackets 31 and a plurality of stationary terminals 32 installed between the two brackets 31, the two brackets 31 are respectively provided with a limiting hole 33 engaged with the screw 30, the screw 30 passes through the limiting hole 33, one end of the screw 30 is engaged with one side of the connecting plate 311 in a limiting manner, and the other end of the screw 30 is connected to the screw hole 120 on the beam 12.

As shown in fig. 7, the limiting hole 33 of at least one of the brackets 31 is elongated, and the length direction of the limiting hole 33 is parallel to the length direction of the beam 12. By arranging the limiting hole 33 with the length direction parallel to the length direction of the cross beam 12 on the connecting plate 311, the mounting position of the bracket 31 can be adjusted along the length direction of the limiting hole 33 when the bracket is mounted, so that the use is more flexible, and the mounting is more convenient. Of course, the limiting hole 33 may also be a U-shaped structure open to the side, and has the characteristic of convenient assembly, all belonging to the protection scope of the present invention.

As shown in fig. 4, the cross beam 12 is U-shaped, the cross beam 12 includes two side arms 121 disposed opposite to each other and a cross arm 122 connected between side edges of the two side arms 121, the two side arms 121 are respectively located on a side of the cross arm 122 away from the top cover 14, the two side arms 121 are respectively connected to the side plates 11 on both sides, screw holes 120 are provided in the cross arm 122, and the stationary contact mechanism 3 is disposed between the two side arms 121 and connected to the cross arm 122.

Further, a top arm 123 is disposed at a side edge of the top side of the cross arm 122, the top arm 123 and the two side arms 121 are located at the same side of the cross arm 122, and the stationary contact mechanism 3 is disposed between the two side arms 121 and below the top arm 123.

As shown in fig. 4, the top cover 14 is used for protecting a zero-arcing cover, the top cover 14 includes a top cover plate 141, side cover plates 142 oppositely disposed on two side edges of the top cover plate 141, and an inner cover plate 144 and an outer cover plate 145 oppositely disposed on the other two side edges of the top cover plate 141, the inner cover plate 144 is disposed opposite to the beam 12, and the side cover plates 142 are provided with connecting holes 143 connected to the side plates 11. The attachment holes 143 may be attached by screws and bolts, or by a snap fit.

Further, the inner cover plate 144 includes a first inner cover plate 144a and a third inner cover plate 144c which are respectively arranged in parallel with the beam 12, and a second inner cover plate 144b connected between the first inner cover plate 144a and the third inner cover plate 144c, the third inner cover plate 144c is correspondingly arranged on one side of the screw hole 120 on the beam 12, the third inner cover plate 144c is arranged on one side of the first inner cover plate 144a far away from the beam 12, and a space for avoiding the screw 30 is formed between the third inner cover plate 144c and the second inner cover plate 144 b.

As shown in fig. 5, an embodiment of the stationary contact mechanism 3 is shown, where the stationary contact mechanism 3 includes two brackets 31 and a plurality of stationary terminals 32 installed between the two brackets 31, two brackets 31 are respectively provided with a limiting hole 33 engaged with the screw 30, the screw 30 passes through the limiting hole 33, one end of the screw 30 is in limiting engagement with one side of the connecting plate 311, and the other end of the screw 30 is connected with the screw hole 120 on the cross beam 12.

The support 31 is L-shaped, the support 31 comprises a connecting plate 311 and a clamping plate 312 which are vertically connected, a plurality of static terminals 32 are fixed between the clamping plates 312 of the two supports 31, two static contacts 34 are respectively arranged on the side surface of each static terminal 32, a movable contact mechanism comprises a movable contact bridge arranged between the two static contacts 34, the two ends of the movable contact bridge can be driven to be respectively contacted with the two static contacts 34 when the circuit breaker body 2 moves towards the static terminals 32, a passage is formed between the two static contacts 34, the connecting plates 311 of the two supports 31 are respectively arranged opposite to the cross beam 12, and limiting holes 33 are respectively arranged on the connecting plates 311 of the two supports 31.

Further, the height of the limiting holes 33 on the connecting plates 311 of the two brackets 31 is different. Fig. 5 shows an embodiment in which the limiting hole 33 of one bracket 31 is disposed at the top of the connecting plate 311, and the limiting hole 33 of the other bracket 31 is disposed at the bottom of the connecting plate 311. The two limiting holes 33 with different heights can limit the static contact mechanism 3 from two opposite vertex angles of the static contact mechanism 3 respectively, so that the static contact mechanism 3 can be more reliably installed on the cross beam 12.

Further, the connecting plates 311 of the two brackets 31 are respectively provided with a guide cylinder 313 on one side away from the beam 12, and the movable contact mechanism is provided with a guide shaft inserted into the guide cylinder 313 and slidably fitted.

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 (10)

1. The utility model provides a frame circuit breaker, includes drawer seat (1) and sliding mounting circuit breaker body (2) and secondary circuit device in drawer seat (1), drawer seat (1) including curb plate (11) of two relative settings, connect top shield (14) between two curb plate (11) tops and connect base (13) between two curb plate (11) bottoms, its characterized in that: the top cover (14) comprises a top cover plate (141), an inner cover plate (144) and an outer cover plate (145) which are vertically arranged between two side plates (11), the inner cover plate (144) and the outer cover plate (145) are oppositely arranged on the two side edges of the top cover plate (141), the drawer base (1) further comprises a cross beam (12) which is vertically connected between the top ends of the two side plates (11), a static contact mechanism (3) of the secondary circuit device is arranged on one side of the cross beam (12) and located between the two side plates (11), the other side of the cross beam (12) is the plate (144) of the top cover (14), a screw (30) is arranged on one side of the cross beam (12) far away from the top cover (14), a screw hole (120) connected with the screw (30) is arranged on the side surface of the cross beam (12), a gap is left between the position of the inner cover plate (144) corresponding to the screw hole (120) and the cross beam (12), and the screw (30) is, the screw (30) passes through the screw hole (120) and extends to the position between the other side of the cross beam (12) and the inner cover plate (144) of the top cover (14).

2. The frame circuit breaker of claim 1, wherein: the static contact mechanism (3) comprises two supports (31) and a plurality of static terminals (32) arranged between the two supports (31), the two supports (31) are respectively provided with a limiting hole (33) matched with the screw (30), the screw (30) penetrates through the limiting hole (33), one end of the screw (30) is in limiting fit with one side of the connecting plate (311), and the other end of the screw (30) is connected with the screw hole (120) in the cross beam (12).

3. The frame circuit breaker of claim 1, wherein: the limiting hole (33) in at least one support (31) is long-strip-shaped, and the length direction of the limiting hole (33) is parallel to the length direction of the cross beam (12).

4. The frame circuit breaker of claim 1, wherein: the cross beam (12) is U-shaped, the cross beam (12) comprises two side arms (121) which are arranged oppositely and a cross arm (122) connected between the side edges of one side of each side arm (121), the two side arms (121) are respectively located on one side, far away from the top cover (14), of the cross arm (122), the two side arms (121) are respectively connected with the side plates (11) on the two sides, screw holes (120) are formed in the cross arm (122), and the static contact mechanism (3) is arranged between the two side arms (121) and connected with the cross arm (122).

5. The frame circuit breaker of claim 4, wherein: the side edge of the top side of the cross arm (122) is provided with a top arm (123), the top arm (123) and the two side arms (121) are positioned at the same side of the cross arm (122), and the static contact mechanism (3) is arranged between the two side arms (121) and is positioned below the top arm (123).

6. The frame circuit breaker of claim 1, wherein: the top cover (14) comprises a top cover plate (141), side cover plates (142) oppositely arranged on two side edges of the top cover plate (141), an inner cover plate (144) and an outer cover plate (145) oppositely arranged on the other two side edges of the top cover plate (141), the inner cover plate (144) is oppositely arranged with the cross beam (12), and the side cover plate (142) is provided with a connecting hole (143) connected with the side plate (11); inner shroud (144) including respectively with crossbeam (12) parallel arrangement's first inner shroud (144a) and third inner shroud (144c), and connect second inner shroud (144b) between first inner shroud (144a) and third inner shroud (144c), third inner shroud (144c) correspond the one side that sets up screw hole (120) on crossbeam (12), and third inner shroud (144c) set up the one side of keeping away from crossbeam (12) in first inner shroud (144a), form the space that is used for dodging screw (30) between third inner shroud (144c) and second inner shroud (144 b).

7. The frame circuit breaker of claim 1, wherein: and nuts are welded on one side, far away from the static contact mechanism (3), of the cross beam (12), and the screws (30) penetrate through the screw holes (120) and are connected with the nuts.

8. The frame circuit breaker of claim 2, wherein: the support (31) is L-shaped, the support (31) comprises a connecting plate (311) and clamping plates (312) which are vertically connected, a plurality of static terminals (32) are fixed between the clamping plates (312) of the two supports (31), the connecting plate (311) of the two supports (31) is respectively arranged opposite to the cross beam (12), limiting holes (33) are respectively arranged on the connecting plates (311) of the two supports (31), and the heights of the limiting holes (33) on the connecting plates (311) of the two supports (31) are different.

9. The frame circuit breaker of claim 2, wherein: the secondary circuit device comprises a static contact mechanism (3) and a dynamic contact mechanism which are oppositely arranged, wherein the static contact mechanism (3) is arranged on the cross beam (12), and the dynamic contact mechanism is arranged on the breaker body (2); the side of every quiet terminal (32) of quiet contact mechanism (3) is equipped with two stationary contacts (34) respectively, move contact mechanism include with set up the moving contact bridge between two stationary contacts (34), can drive the both ends of moving contact bridge when circuit breaker body (2) move to quiet terminal (32) direction respectively with two stationary contacts (34) contact, make and form the route between two stationary contacts (34).

10. The frame circuit breaker of claim 1, wherein: be equipped with drive mechanism (15) of being connected with circuit breaker body (2) on base (13), drive mechanism (15) include pushing mechanism and rotary mechanism, pushing mechanism includes worm (151), the cover is on worm (151) with worm (151) screw-thread fit's push pedal (152), slide (153) of being connected with push pedal (152), rotary mechanism includes swivel mount (159), pivot shaft (154) of pivot installation on swivel mount (159) and set up cantilever (156) of being connected with circuit breaker body (2) and gear (157) of cooperating with slide (153) on pivot (154), be equipped with a plurality of draw-in grooves (158) of meshing fit with gear (157) on slide (153), worm (151) drive push pedal (152) through the screw when rotating and move slide (153), slide (153) drive pivot (154) rotation through draw-in groove (158) drive gear (157) when moving, when the rotating shaft (154) rotates, the circuit breaker body (2) is driven to move through the cantilever (156).

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