CN209822577U - Mechanism embedded type molded case circuit breaker - Google Patents
Mechanism embedded type molded case circuit breaker Download PDFInfo
- Publication number
- CN209822577U CN209822577U CN201920686634.5U CN201920686634U CN209822577U CN 209822577 U CN209822577 U CN 209822577U CN 201920686634 U CN201920686634 U CN 201920686634U CN 209822577 U CN209822577 U CN 209822577U
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- switch
- handle
- switching
- transmission plate
- position switch
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Abstract
The utility model discloses a mechanism embedded molded case circuit breaker, which comprises a base, a middle cover and an upper cover; the upper cover is provided with a handle through hole, the circuit breaker handle extends out of the handle through hole, the opening and closing operation mechanism comprises a motor device, a control circuit board, a screw rod assembly, a transmission plate and a mounting frame, and the upper part of the middle cover is provided with a first accommodating concave cavity and a second accommodating concave cavity; the motor device and the screw rod assembly are arranged on the mounting frame to form an assembly, the assembly is arranged in the first accommodating concave cavity, and the control circuit board is arranged in the second accommodating concave cavity; the lead screw assembly comprises a lead screw and a moving block, one end of a transmission plate is fixedly connected with the moving block, the other end of the transmission plate is provided with a handle sleeve hole, and a breaker handle is positioned in the handle sleeve hole; the control circuit board is electrically connected with a switch-on position switch, a switch-off position switch and an initial position switch, and the transmission plate/moving block is fixed with a trigger component. The utility model relates to a rationally, do benefit to the miniaturized design of product, have fine result of use.
Description
Technical Field
The utility model relates to an embedded moulded case circuit breaker of mechanism belongs to circuit breaker structural design field.
Background
The plastic shell type circuit breaker is usually adopted as a terminal switch or a branch switch in a low-voltage distribution system, plays a role in real-time protection on a power supply circuit and mechanical equipment, and can automatically cut off a circuit when the circuit and the equipment are overloaded or short-circuited and have undervoltage faults. There are various electric/manual dual-purpose switching on/off operation devices applied to a molded case circuit breaker, and a manual/electric switching mechanism is required to be provided for switching between the manual switching on/off operation and the electric switching on/off operation, as disclosed in patent document CN202772078U, a circuit breaker switching on/off operation device includes a manual operation mechanism, an electric operation mechanism, and a manual/electric switching mechanism. In the above patent document, a manual/electric switching mechanism is provided to switch between the manual switching on/off mode and the electric switching on/off mode, so that the electric switching on/off mode and the manual switching on/off mode are switched on and off in actual use according to actual conditions.
The following problems exist when the breaker opening and closing operation device is arranged in a breaker shell:
firstly, after the circuit breaker opening and closing operation device is installed, the whole opening and closing operation device protrudes out of the upper surface of the middle cover to be installed, and then the opening and closing operation device can be covered only by increasing the height of the upper cover, so that the appearance size (mainly embodied in height size) of the whole molded case circuit breaker is difficult to reduce, and the miniaturization design of a product is not facilitated; secondly, in the actual use process, before the manual opening and closing operation, a worker firstly manually operates the manual/electric switching mechanism to switch the opening and closing operation mode to the manual opening and closing operation mode, then pulls the operation handle to manually open or close the switch, and when the manual/electric switching mechanism needs to be switched to the electric opening and closing operation mode, the manual/electric switching mechanism needs to be operated to switch to the electric opening and closing operation mode, so that the operation steps are more, the operation is inconvenient, and the worker unfamiliar with the operation of the circuit breaker is easy to operate wrongly particularly in an emergency situation.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model aims at providing a moulded case circuit breaker, its structural design is reasonable, does benefit to the miniaturized design of product, and divide-shut brake convenient operation, has fine result of use.
Realize the utility model discloses the technical scheme of purpose is:
a mechanism embedded molded case circuit breaker comprises a base, a middle cover arranged on the upper part of the base and an upper cover arranged on the upper part of the middle cover, wherein a switching-on and switching-off operating mechanism is arranged on the middle cover; a handle through hole is formed in the middle cover and the upper cover in the opposite position, a breaker handle extends out of the handle through hole, the opening and closing operation mechanism comprises a motor device, a control circuit board, a lead screw assembly, a transmission plate and a mounting frame, and a first accommodating concave cavity and a second accommodating concave cavity which are recessed downwards are formed in the upper portion of the middle cover; the motor device and the screw rod assembly are arranged on the mounting frame to form an assembly, the assembly is arranged in the first accommodating cavity, and the control circuit board is arranged in the second accommodating cavity; the control circuit board is electrically connected with the motor device, the lead screw assembly comprises a lead screw driven by the motor device to rotate and a moving block matched with the lead screw, one end of the transmission plate is fixedly connected with the moving block, the other end of the transmission plate is provided with a handle sleeve hole, the handle of the circuit breaker is positioned in the handle sleeve hole, and the motor device drives the transmission plate to do linear motion along the axial direction of the lead screw when rotating; the control circuit board is electrically connected with three switches, the three switches are arranged at intervals along the axis direction of the lead screw, the three switches are respectively a switching-on position switch, a switching-off position switch and an initial position switch, the initial position switch is arranged between the switching-on position switch and the switching-off position switch, a triggering part suitable for triggering each switch is fixed on the transmission plate/the moving block, and when the triggering part is positioned at a position for triggering the initial position switch, a gap is formed between the hole wall of the handle trepan and the breaker handle so that the breaker handle can be manually switched between the switching-on position and the switching-off position, and manual switching-on and switching-off are realized; when the switch is switched on or switched off electrically, the control circuit board controls the motor device to rotate and drives the screw rod to rotate, so that the transmission plate and the trigger component are driven to move synchronously along the axial direction of the screw rod, when the trigger component moves to trigger the switch-on position switch or the switch-off position switch, the transmission plate pushes the breaker handle to the switch-on position or the switch-off position at the same time, and after the switch-on position switch or the switch-off position switch is triggered, the control circuit board controls the motor device to rotate reversely to drive the screw rod to rotate reversely so as to drive the transmission plate and the trigger component to move reversely until the trigger component triggers the initial position switch, the control circuit board controls the motor device to stop rotating.
In the above technical scheme, the motor device includes a driving motor and a reduction gear set, an input gear of the reduction gear set is fixed on a motor shaft of the driving motor, and an output gear of the reduction gear set is fixed at an end of the screw rod.
In the above technical scheme, the mounting frame is further provided with a guide structure for guiding the movement of the moving block.
In the above technical solution, the guide structure is a guide bar arranged on the mounting frame in the same direction as the lead screw, and the moving block is provided with a groove matched with the guide bar.
In the technical scheme, a supporting table board is arranged at the position, close to the handle of the circuit breaker, of the upper portion of the middle cover, limiting parts are arranged on two sides of the transmission plate, 7-shaped limiting hook plates are arranged on the limiting parts, and the limiting hook plates are matched with the supporting table board to limit the transmission plate.
In the above technical solution, the mounting bracket is fixed in the first accommodating cavity by a fixing screw;
be equipped with spacing draw-in groove on the first lateral wall that holds the cavity, have on the mounting bracket with spacing draw-in groove complex joint portion.
The utility model discloses has positive effect: in the scheme of the utility model, firstly, the opening and closing operation mechanism is basically embedded and installed in the middle cover, and does not occupy or occupies little height space above the upper surface of the middle cover, thereby reducing the height size of the upper cover, having compact and reasonable structure, and being beneficial to the miniaturization design of products (mainly reducing the height size); secondly, after the electric opening or closing is finished, the trigger part is always moved to the position for triggering the initial position switch, and when the trigger part reaches the position for triggering the initial position switch, the gap is formed between the breaker handle and the hole wall of the handle trepanning, so that the breaker handle can be directly and manually pulled to switch between the closing position and the opening position without being interfered by the transmission plate at the moment, in other words, the breaker handle is not linked with the transmission plate at the moment and can be freely and manually opened and closed, the operation convenience of opening and closing is improved, a manual/electric switching mechanism is not needed to be arranged externally to manually switch an operation mode, the misoperation caused by the manual/electric switching mechanism can be effectively avoided, and the use effect is good.
Drawings
Fig. 1 is a perspective view of the mechanism-embedded molded case circuit breaker of the present invention;
fig. 2 is a top view of the mechanism-embedded molded case circuit breaker of fig. 1;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
fig. 4 is a perspective view of the mechanism-embedded molded case circuit breaker of the present invention with the upper cover removed;
FIG. 5 is a schematic structural view of the middle cover of the present invention;
fig. 6 is a schematic structural view of a middle position limiting component of the present invention;
fig. 7 is a front view of the switching-on/off operation mechanism of the present invention;
fig. 8 is a perspective view of the opening and closing operation mechanism shown in fig. 7;
FIG. 9 is a front view of the trip actuator of FIG. 7 with parts broken away;
fig. 10 is an assembly view of the lead screw, the moving block and the guide block of the present invention;
fig. 11 is a schematic structural view of the mounting frame of the present invention;
fig. 12 is a schematic structural view of the middle transmission plate of the present invention.
The reference symbols shown in the figures are: 01-a base; 02-middle cover; 021-a first accommodation cavity; 022-a second receiving cavity; 023-supporting the table; 024-a limit slot; 03-covering; 04-perforating the handle; 05-a control circuit board; 06-a limiting part; 061-a limit hook plate; 1-an electric machine arrangement; 11-a drive motor; 12-a reduction gear set; 13-an input gear; 14-an output gear; 2-a transmission plate; 21-handle trepanning; 3-a circuit breaker handle; 4-a screw rod; 5-moving block; 51-groove; 6-closing position switch; 7-opening position switch; 8-initial position switch; 9-a trigger member; 10-a mounting frame; 101-a guide bar; 102-snap-in part.
Detailed Description
The specific structure of the present invention is described below with reference to the attached drawings:
a mechanism-embedded molded case circuit breaker, as shown in fig. 1 to 9, comprising a base 01, a middle cover 02 mounted on the upper portion of the base 01, and an upper cover 03 mounted on the upper portion of the middle cover 02, wherein a switching-on/off operation mechanism is mounted on the middle cover 02; a handle through hole 04 is formed in the middle cover 02 and the upper cover 03 in an opposite position, the breaker handle 3 extends out of the handle through hole 04, the switching-on/off operating mechanism comprises a motor device 1, a control circuit board 05, a screw rod assembly, a transmission plate 2 and an installation frame 10, and a first accommodating concave cavity 021 and a second accommodating concave cavity 022 which are recessed downwards are formed in the upper portion of the middle cover 02; the motor device 1 and the screw assembly are mounted on the mounting bracket 10 to form an assembly, the assembly is mounted in the first accommodating cavity 021, and the control circuit board 05 is mounted in the second accommodating cavity 022; the control circuit board 05 is electrically connected with the motor device 1, the lead screw assembly comprises a lead screw 4 driven by the motor device 1 to rotate and a moving block 5 matched with the lead screw 4, one end of the transmission plate 2 is fixedly connected with the moving block 5, the other end of the transmission plate 2 is provided with a handle sleeve hole 21, the breaker handle 3 is positioned in the handle sleeve hole 21, and the transmission plate 2 is driven to linearly move along the axis direction of the lead screw 4 when the motor device 1 rotates; the control circuit board 05 is electrically connected with three switches, the three switches are arranged at intervals along the axial direction of the lead screw 4, the three switches are respectively a switch-on position switch 6, a switch-off position switch 7 and an initial position switch 8, the initial position switch 8 is arranged between the switch-on position switch 6 and the switch-off position switch 7, a trigger component 9 suitable for triggering each switch is fixed on the transmission plate 2/the moving block 5, when the trigger component 9 is at a position for triggering the initial position switch 8, enough clearance is reserved between the hole wall of the handle trepanning 21 and the breaker handle 3 for the breaker handle 3 to be manually switched between the switch-on position and the switch-off position without being interfered by the transmission plate 2, so that manual switch-on and switch-off are realized; when the switch is switched on or switched off electrically, the control circuit board 05 controls the motor device 1 to rotate and drives the screw rod 4 to rotate, so as to drive the transmission plate 2 and the trigger part 9 to move synchronously along the axial direction of the screw rod 4, when the trigger part 9 moves to trigger the switch-on position switch 6 or the switch-off position switch 7, the transmission plate 2 pushes the breaker handle 3 to the switch-on position or the switch-off position at the same time, and after the switch-on position switch 6 or the switch-off position switch 7 is triggered, the control circuit board 05 controls the motor device 1 to rotate reversely to drive the screw rod 4 to rotate reversely, so as to drive the transmission plate 2 and the trigger part 9 to move reversely, until the trigger part 9 triggers the initial position switch 8, the control circuit board 05 controls the motor device 1 to stop rotating. In the scheme of the embodiment, firstly, the opening and closing operation mechanism is basically embedded and installed in the middle cover, so that the height space above the upper surface of the middle cover is not occupied or is rarely occupied, the height size of the upper cover is reduced, the structure is compact and reasonable, and the miniaturization design (mainly the reduction of the height size) of a product is facilitated; secondly, when the switching-on/off operating mechanism runs, when the electric switching-off or the electric switching-on is completed, the trigger part 9 is always moved to the position for triggering the initial position switch 8, when the trigger part 9 is at the position of triggering the initial position switch 8, the gap exists between the breaker handle 3 and the wall of the handle trepan 21, so that the breaker handle 3 can be manually pulled from the outside of the upper cover 03 to switch between the switching-on position and the switching-off position without being interfered by the transmission plate 2, in other words, the breaker handle is not linked with the transmission plate at the moment and can be freely and manually switched on and off, therefore, the operation convenience of switching on and off is improved, a manual/electric switching mechanism is not required to be arranged to manually switch on and off operation modes, misoperation caused by the manual/electric switching mechanism can be effectively avoided, and the use effect is good. And a manual/electric switching mechanism is not required to be arranged externally to manually switch the operation mode, so that misoperation caused by the manual/electric switching mechanism can be effectively avoided, and the use effect is good.
The three switches adopted in the embodiment can be micro switches, photoelectric switches and other existing switches, the driving motor adopts a miniature direct current motor, and the motor is high in efficiency, small in size and convenient to install.
In this embodiment, the motor device 1 includes a driving motor 11 and a reduction gear set 12, the driving motor 11 is transversely installed in the first accommodating cavity 021, an input gear 13 of the reduction gear set 12 is fixed on a motor shaft of the driving motor 11, and an output gear 14 of the reduction gear set 12 is fixed on an end of the screw rod 4, so that the output rotation speed of the driving motor 11 is adjusted to a proper rotation speed through the reduction gear set 12 and then is output to the screw rod 4.
Further, still be equipped with on the mounting bracket 10 for the removal of movable block 5 provides the guide structure of direction, it is specific the both ends of lead screw 4 respectively through the bearing with the both sides wallboard of mounting bracket 10 links to each other, constitute each gear of reduction gear set is respectively through the rotatable installation of installation axle on a side wallboard of mounting bracket 10, driving motor 11 passes through the screw fixation and is in on the side wallboard of mounting bracket 10, adopt above-mentioned structure, when assembling this divide-shut brake operating device, install driving motor 11 and reduction gear set 12 on the mounting bracket earlier, then during later stage assembly, cover in the circuit breaker with the mounting bracket fixing, in order to make things convenient for later stage assembly.
As a further improvement of the above embodiment, the guiding structure is a guiding rod 101 disposed on the mounting frame 10 and in the same direction as the lead screw 4, the moving block 5 has a groove 51 engaged with the guiding rod 101, and the guiding rod 101 is engaged with the groove 51, so that when the lead screw 4 rotates, the moving block 5 is ensured to move only along the axial direction of the lead screw 4 and cannot rotate in the circumferential direction under the guiding action of the guiding rod 101.
Well lid 02 upper portion is neighbouring the position of circuit breaker handle 3 is equipped with support mesa 023, well lid 02 upper portion is in 2 both sides of driving plate are provided with stop part 06, the spacing board 061 that colludes of "7" font is equipped with on the stop part 06, spacing board 061 that colludes with it is right to support the mesa 023 to cooperate the driving plate 2 carries out spacing prevention driving plate 2 and takes place the incline, and does not influence the normal removal of driving plate 2.
The mounting bracket 10 is fixed in the first accommodating cavity 021 through a fixing screw; a limiting clamping groove 024 is arranged on the side wall of the first accommodating concave cavity 021, and a clamping part 102 matched with the limiting clamping groove 024 is arranged on the mounting rack 10.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious changes and modifications which fall within the spirit of the invention are deemed to be covered by the present invention.
Claims (6)
1. A mechanism-embedded molded case circuit breaker comprises a base (01), a middle cover (02) arranged on the upper portion of the base (01) and an upper cover (03) arranged on the upper portion of the middle cover (02), wherein a switching-on and switching-off operating mechanism is arranged on the middle cover (02); a handle through hole (04) is formed in the middle cover (02) and the upper cover (03) in an opposite position, and a breaker handle (3) extends out of the handle through hole (04), and the switching-on/off operating mechanism is characterized by comprising a motor device (1), a control circuit board (05), a screw rod assembly, a transmission plate (2) and a mounting frame (10), wherein a first accommodating concave cavity (021) and a second accommodating concave cavity (022) which are recessed downwards are formed in the upper portion of the middle cover (02); the motor device (1) and the screw rod assembly are arranged on the mounting frame (10) to form an assembly, the assembly is arranged in the first accommodating cavity (021), and the control circuit board (05) is arranged in the second accommodating cavity (022); the control circuit board (05) is electrically connected with the motor device (1), the lead screw assembly comprises a lead screw (4) driven by the motor device (1) to rotate and a moving block (5) matched with the lead screw (4), one end of the transmission plate (2) is fixedly connected with the moving block (5), the other end of the transmission plate (2) is provided with a handle sleeve hole (21), the breaker handle (3) is positioned in the handle sleeve hole (21), and the motor device (1) drives the transmission plate (2) to do linear motion along the axis direction of the lead screw (4) when rotating; the control circuit board (05) is electrically connected with three switches, the three switches are arranged at intervals along the axis direction of the lead screw (4), the three switches are respectively a switching-on position switch (6), a switching-off position switch (7) and an initial position switch (8), the initial position switch (8) is arranged between the switching-on position switch (6) and the switching-off position switch (7), a trigger component (9) suitable for triggering each switch is fixed on the transmission plate (2)/the moving block (5), when the trigger component (9) is located at a position for triggering the initial position switch (8), a gap is formed between the hole wall of the handle trepan (21) and the breaker handle (3) to enable the breaker handle (3) to be manually switched between a switching-on position and a switching-off position, so that manual switching-on and switching-off are achieved; when the electric switch-on or the electric switch-off is carried out, the control circuit board (05) controls the motor device (1) to rotate and drives the screw rod (4) to rotate so as to drive the transmission plate (2) and the trigger part (9) to axially and synchronously move along the screw rod (4), when the trigger part (9) moves to trigger the switch-on position switch (6) or the switch-off position switch (7), the transmission plate (2) pushes the circuit breaker handle (3) to the switch-on position or the switch-off position at the same time, and after the switch-on position switch (6) or the switch-off position switch (7) is triggered, the control circuit board (05) controls the motor device (1) to reversely rotate so as to drive the transmission plate (2) and the trigger part (9) to reversely move until the trigger part (9) triggers the initial position switch (8), the control circuit board (05) controls the motor device (4) 1) The rotation is stopped.
2. The mechanism-embedded molded case circuit breaker according to claim 1, wherein the motor device (1) comprises a driving motor (11) and a reduction gear set (12), an input gear (13) of the reduction gear set (12) is fixed on a motor shaft of the driving motor (11), and an output gear (14) of the reduction gear set (12) is fixed on an end of the lead screw (4).
3. The mechanism-embedded molded case circuit breaker according to claim 2, wherein a guide structure for guiding the movement of the moving block (5) is further provided on the mounting frame (10).
4. The mechanism-embedded molded case circuit breaker according to claim 3, wherein the guide structure is a guide bar (101) provided on the mounting bracket (10) in the same direction as the lead screw (4), and the moving block (5) has a groove (51) fitted with the guide bar (101).
5. The mechanism embedded molded case circuit breaker according to any one of claims 1 to 4, wherein a supporting table (023) is provided at a position on the upper portion of the middle cover (02) adjacent to the breaker handle (3), a limiting part (06) is provided on both sides of the driving plate (2) on the upper portion of the middle cover (02), a 7-shaped limiting hook plate (061) is provided on the limiting part (06), and the limiting hook plate (061) is matched with the supporting table (023) to limit the driving plate (2).
6. The mechanism-embedded molded case circuit breaker according to any one of claims 1 to 4, wherein the mounting bracket (10) is fixed within the first accommodation cavity (021) by a fixing screw;
the side wall of the first containing concave cavity (021) is provided with a limiting clamping groove (024), and the mounting rack (10) is provided with a clamping part (102) matched with the limiting clamping groove (024).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018213089445 | 2018-08-04 | ||
| CN201821308944 | 2018-08-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209822577U true CN209822577U (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920686634.5U Active CN209822577U (en) | 2018-08-04 | 2019-05-07 | Mechanism embedded type molded case circuit breaker |
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| CN (1) | CN209822577U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109243928A (en) * | 2018-08-04 | 2019-01-18 | 佳电气有限公司 | The embedded breaker of plastic casing of mechanism |
| CN114242528A (en) * | 2020-09-09 | 2022-03-25 | 周口平高智能电气有限公司 | Intelligent circuit breaker of automatic divide-shut brake of remote control |
-
2019
- 2019-05-07 CN CN201920686634.5U patent/CN209822577U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109243928A (en) * | 2018-08-04 | 2019-01-18 | 佳电气有限公司 | The embedded breaker of plastic casing of mechanism |
| CN109243928B (en) * | 2018-08-04 | 2023-09-12 | 佳一电气有限公司 | Mechanism embedded molded case circuit breaker |
| CN114242528A (en) * | 2020-09-09 | 2022-03-25 | 周口平高智能电气有限公司 | Intelligent circuit breaker of automatic divide-shut brake of remote control |
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