CN109243928B - Mechanism embedded molded case circuit breaker - Google Patents
Mechanism embedded molded case circuit breaker Download PDFInfo
- Publication number
- CN109243928B CN109243928B CN201810921337.4A CN201810921337A CN109243928B CN 109243928 B CN109243928 B CN 109243928B CN 201810921337 A CN201810921337 A CN 201810921337A CN 109243928 B CN109243928 B CN 109243928B
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- Prior art keywords
- screw rod
- transmission plate
- position switch
- handle
- switching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
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Abstract
The invention discloses a mechanism embedded molded case circuit breaker, which comprises a base, a middle cover and an upper cover, wherein the middle cover is arranged on the base; the circuit breaker handle extends out of the handle perforation, and the opening and closing operating mechanism comprises a motor device, a control circuit board, a screw rod assembly, a transmission plate and a mounting frame; 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 screw rod assembly comprises a screw rod and a moving block, one end of a transmission plate is fixedly connected with the moving block, a handle sleeve hole is formed in the other end of the transmission plate, and a breaker handle is positioned in the handle sleeve hole; the control circuit board is electrically connected with a closing position switch, a separating position switch and an initial position switch, and the transmission plate/moving block is fixed with a triggering part. The mechanism embedded molded case circuit breaker has reasonable structural design, is beneficial to miniaturization design of products and has good use effect.
Description
Technical Field
The invention relates to a mechanism embedded molded case circuit breaker, and belongs to the field of circuit breaker structural design.
Background
In a low-voltage distribution system, a plastic shell type breaker is often adopted as a terminal switch or a branch switch, so that a real-time protection effect is achieved on a power line and mechanical equipment, and when overload or short circuit and undervoltage faults of the line and the equipment occur, the circuit can be automatically cut off. In order to realize switching between manual opening and closing operation and electric opening and closing operation, a manual/electric switching mechanism is required to be arranged, for example, patent document CN202772078U discloses an opening and closing operation device for a circuit breaker, which comprises a manual operation mechanism, an electric operation mechanism and a manual/electric switching mechanism. In the above patent document, the manual/electric switching mechanism is provided to switch between the manual opening and closing operation modes and the electric opening and closing operation modes, so that the electric opening and closing operation and the manual opening and closing operation are performed according to actual conditions in the actual use process.
The following problems exist in installing the breaker opening and closing operation device in a breaker shell:
firstly, after the installation of the opening and closing operation device of the circuit breaker is completed, 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 the height size) of the whole molded case circuit breaker is difficult to reduce, and the miniaturization design of products is not facilitated; secondly, before manual opening and closing operation, a worker needs to manually operate the manual/electric switching mechanism to switch the opening and closing operation mode to the manual opening and closing operation mode in the actual use process, then pulls the operation handle to manually open or close, and when the manual/electric switching mechanism needs to be switched to the electric opening and closing operation mode, the worker needs to operate the manual/electric switching mechanism to switch to the electric opening and closing operation mode, so that the operation steps are more, the operation is more inconvenient, and the worker who is unfamiliar with the operation of the circuit breaker is easy to operate by mistake in particular in emergency.
Disclosure of Invention
In this regard, the invention aims to provide a molded case circuit breaker which has reasonable structural design, is beneficial to miniaturization design of products, is convenient to operate in opening and closing, and has good use effect.
The technical scheme for realizing the aim of the invention is as follows:
the 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 the middle cover is provided with a switching-on and switching-off operating mechanism; the circuit breaker handle extends out of the handle perforation, the opening and closing operating mechanism comprises a motor device, a control circuit board, a screw rod assembly, a transmission plate and a mounting rack, and a first accommodating concave cavity and a second accommodating concave cavity which are sunken downwards are formed in the upper part 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 concave cavity, and the control circuit board is arranged in the second accommodating concave cavity; the control circuit board is electrically connected with the motor device, the screw rod assembly comprises a screw rod driven to rotate by the motor device and a moving block matched with the screw rod, one end of the transmission plate is fixedly connected with the moving block, a handle sleeve hole is formed in the other end of the transmission plate, the breaker handle is positioned in the handle sleeve hole, and the motor device drives the transmission plate to do linear motion along the axis direction of the screw rod 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 screw rod, the three switches are a closing position switch, a separating brake position switch and an initial position switch respectively, the initial position switch is arranged between the closing position switch and the separating brake position switch, a trigger component suitable for triggering each switch is fixed on the transmission plate/the moving block, when the trigger component is positioned at the position for triggering the initial position switch, a gap is formed between the hole wall of the handle sleeve hole and the breaker handle for the breaker handle to manually switch between the closing position and the separating brake position so as to realize manual switching on and off; when the electric switch-on or switch-off is carried out, 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 part are driven to axially and synchronously move along the screw rod, when the trigger part 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, after the switch-on position switch or the switch-off position switch is triggered, the control circuit board controls the motor device to reversely rotate to drive the screw rod to reversely rotate, so as to drive the transmission plate and the trigger part to reversely move, and until the trigger part triggers the initial position switch, the control circuit board controls the motor device to stop rotating.
In the above technical scheme, the motor device comprises 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 the end part of the screw rod.
In the above technical scheme, the mounting frame is also provided with a guide structure for guiding the movement of the moving block.
In the above technical scheme, the guide structure is a guide rod which is arranged on the mounting frame and is arranged in the same direction as the screw rod, and the moving block is provided with a groove matched with the guide rod.
In the technical scheme, the position of the upper part of the middle cover, which is adjacent to the handle of the circuit breaker, is provided with a supporting table surface, the two sides of the transmission plate are provided with limiting parts, the limiting parts are provided with 7-shaped limiting hook plates, and the limiting hook plates are matched with the supporting table surface to limit the transmission plate.
In the above technical scheme, the mounting rack is fixed in the first accommodating concave cavity through a fixing screw;
the side wall of the first accommodating concave cavity is provided with a limiting clamping groove, and the mounting rack is provided with a clamping part matched with the limiting clamping groove.
The invention has the positive effects that: in the scheme of the invention, firstly, the opening and closing operating mechanism is basically embedded and arranged in the middle cover, does not occupy or occupies little height space above the upper surface of the middle cover, reduces the height dimension of the upper cover, has compact and reasonable structure, and is beneficial to the miniaturization design (mainly the height dimension is reduced) of products; secondly, after the electric opening or the electric closing is finished, the trigger part always moves to a 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 wall of the handle sleeve hole, so that the breaker handle can be directly manually pulled to switch between the closing position and the opening position at the moment and is not interfered by a transmission plate, in other words, the breaker handle and the transmission plate are not linked and can be freely manually opened and closed, thus the convenience of opening and closing operation is improved, a manual/electric switching mechanism is not required to be arranged for manually switching an operation mode, misoperation caused by the manual/electric switching mechanism can be effectively avoided, and the electric switching mechanism has a good use effect.
Drawings
Fig. 1 is a perspective view of a mechanical built-in molded case circuit breaker of the present invention;
FIG. 2 is a top view of the mechanical built-in 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 mechanical embedded molded case circuit breaker of the present invention with the upper cover removed;
FIG. 5 is a schematic view of the structure of the middle cover in the present invention;
FIG. 6 is a schematic view of a limiting member according to the present invention;
FIG. 7 is a front view of the opening and closing operating 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 opening and closing operating mechanism of FIG. 7 with parts omitted;
FIG. 10 is an assembly view of a screw, a moving block and a guide block according to the present invention;
FIG. 11 is a schematic view of the structure of the mounting frame of the present invention;
fig. 12 is a schematic structural view of a driving plate in the present invention.
The reference numerals shown in the figures are: 01-base; 02-middle cover; 021-first receiving cavity; 022-a second receiving cavity; 023-support table top; 024-limit clamping groove; 03-upper cover; 04-handle perforation; 05-a control circuit board; 06-a limiting component; 061-a limit hook plate; 1-a motor device; 11-a drive motor; 12-a reduction gear set; 13-an input gear; 14-an output gear; 2-a transmission plate; 21-a handle trepanning; 3-a breaker handle; 4-a screw rod; 5-moving blocks; 51-groove; 6-switching-on position switch; 7-a switch-off position switch; 8-an initial position switch; 9-a trigger member; 10-mounting frame; 101-a guide rod; 102-clamping part.
Detailed Description
The following describes the specific structure of the present invention with reference to the drawings:
the mechanism embedded molded case circuit breaker comprises a base 01, a middle cover 02 arranged on the upper part of the base 01 and an upper cover 03 arranged on the upper part of the middle cover 02, wherein an opening and closing operation mechanism is arranged on the middle cover 02 as shown in fig. 1 to 9; the handle perforation 04 is arranged at the opposite position of the middle cover 02 and the upper cover 03, the breaker handle 3 extends out of the handle perforation 04, the opening and closing operation mechanism comprises a motor device 1, a control circuit board 05, a screw rod assembly, a transmission plate 2 and a mounting frame 10, and a first accommodating concave cavity 021 and a second accommodating concave cavity 022 which are sunken downwards are arranged at the upper part 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 screw rod assembly comprises a screw rod 4 driven to rotate by the motor device 1 and a moving block 5 matched with the screw rod 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 axial direction of the screw rod 4 when rotating; the control circuit board 05 is electrically connected with three switches, the three switches are arranged at intervals along the axial direction of the screw rod 4, the three switches are a closing position switch 6, a separating brake position switch 7 and an initial position switch 8 respectively, the initial position switch 8 is arranged between the closing position switch 6 and the separating brake position switch 7, a trigger part 9 suitable for triggering each switch is fixed on the transmission plate 2/the moving block 5, when the trigger part 9 is positioned at the position for triggering the initial position switch 8, a sufficient gap is reserved between the hole wall of the handle sleeve hole 21 and the breaker handle 3 for the manual switching of the breaker handle 3 between the closing position and the separating brake position and is not interfered by the transmission plate 2, so that the manual switching on/off is realized; when the motor device 1 is controlled to rotate and drive the screw rod 4 to rotate by the control circuit board 05 during electric switching-on or switching-off, the transmission plate 2 and the trigger part 9 are driven to move synchronously along the axial direction of the screw rod 4, when the trigger part 9 moves to trigger the switching-on position switch 6 or the switching-off position switch 7, the transmission plate 2 pushes the breaker handle 3 to a switching-on position or a switching-off position at the same time, after the switching-on position switch 6 or the switching-off position switch 7 is triggered, the control circuit board 05 controls the motor device 1 to reversely rotate to drive the screw rod 4 to reversely rotate, so as to drive the transmission plate 2 and the trigger part 9 to reversely move, and the control circuit board 05 controls the motor device 1 to stop rotating until the trigger part 9 triggers the initial position switch 8. In the scheme of the embodiment, firstly, the opening and closing operating mechanism is basically embedded and installed in the middle cover, does not occupy or occupies little height space above the upper surface of the middle cover, reduces the height dimension of the upper cover, has compact and reasonable structure, and is beneficial to miniaturized design of products (mainly height dimension reduction); secondly, when the opening and closing operation mechanism is operated, after the electric opening and closing operation or the electric closing operation is completed, the trigger part 9 is always moved to the position for triggering the initial position switch 8, and when the trigger part 9 is positioned at the position for triggering the initial position switch 8, the gap exists between the breaker handle 3 and the wall of the handle sleeve hole 21, so that the breaker handle 3 can be directly manually pulled from the outside of the upper cover 03 to switch between the closing position and the opening and closing position at the moment and is not interfered by the transmission plate 2, in other words, the breaker handle and the transmission plate are not linked at the moment, and the opening and closing operation can be freely performed by manual operation, thereby improving the operation convenience of opening and closing, and the manual/electric switching mechanism is not required to be arranged for manually switching the opening and closing operation mode, thereby the misoperation caused by the gap can be effectively avoided, and the opening and closing operation mechanism has good use effect. The manual/electric switching mechanism is not required to be arranged to manually switch the operation modes, so that misoperation caused by the manual/electric switching mechanism can be effectively avoided, and the operation device has a good use effect.
The three switches adopted in the embodiment can be existing switches such as a micro switch and a photoelectric switch, and the driving motor adopts a miniature direct current motor, so that the motor is high in efficiency and small in size and is 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 mounted 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 portion of the screw rod 4, so that an output rotation speed of the driving motor 11 is adjusted to a proper rotation speed by the reduction gear set 12 and then is output to the screw rod 4.
Further, the mounting frame 10 is further provided with a guiding structure for guiding the movement of the moving block 5, two ends of the screw rod 4 are respectively connected with two side wall plates of the mounting frame 10 through bearings, gears forming the reduction gear set are respectively rotatably mounted on one side wall plate of the mounting frame 10 through mounting shafts, the driving motor 11 is fixed on the side wall plate of the mounting frame 10 through screws, and when the opening and closing operation mechanism is assembled, the driving motor 11 and the reduction gear set 12 are firstly mounted on the mounting frame, and then when the circuit breaker is assembled in a later period, the mounting frame is fixed on a middle cover of the circuit breaker, so that the circuit breaker is convenient to assemble in the later period.
As a further improvement of the above embodiment, the guide structure is a guide rod 101 arranged on the mounting frame 10 and arranged in the same direction with the screw rod 4, the moving block 5 is provided with a groove 51 matched with the guide rod 101, and the guide rod 101 is matched with the groove 51, so that when the screw rod 4 rotates, under the guiding action of the guide rod 101, the moving block 5 can only move along the axial direction of the screw rod 4 and cannot rotate circumferentially.
The position of well lid 02 upper portion is adjacent circuit breaker handle 3 is equipped with supporting table 023, well lid 02 upper portion is in drive plate 2 both sides are provided with spacing part 06, be equipped with the spacing board 061 that colludes of "7" font on the spacing part 06, spacing board 061 with supporting table 023 cooperatees to drive plate 2 carries out spacing prevent that drive plate 2 from taking place the skew, and does not influence drive plate 2's normal movement.
The mounting frame 10 is fixed in the first accommodating concave cavity 021 through a fixing screw; the side wall of the first accommodating cavity 021 is provided with a limiting clamping groove 024, and the mounting frame 10 is provided with a clamping part 102 matched with the limiting clamping groove 024.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While those obvious variations or modifications which come within the spirit of the invention remain within the scope of the invention.
Claims (4)
1. The mechanism embedded molded case circuit breaker comprises a base (01), a middle cover (02) arranged on the upper part of the base (01) and an upper cover (03) arranged on the upper part of the middle cover (02), wherein an opening and closing operation mechanism is arranged on the middle cover (02); the circuit breaker is characterized in that the opening and closing operating mechanism comprises a motor device (1), a control circuit board (05), a screw rod assembly, a transmission plate (2) and a mounting frame (10), wherein a handle perforation (04) is arranged at the opposite position of the middle cover (02) and the upper cover (03), a breaker handle (3) extends out of the handle perforation (04), and a first accommodating concave cavity (021) and a second accommodating concave cavity (022) which are concave downwards are formed in the upper part 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 screw rod assembly comprises a screw rod (4) driven to rotate by the motor device (1) and a moving block (5) matched with the screw rod (4), one end of the transmission plate (2) is fixedly connected with the moving block (5), a handle sleeve hole (21) is formed in the other end of the transmission plate (2), the breaker handle (3) is located in the handle sleeve hole (21), and the motor device (1) drives the transmission plate (2) to do linear motion along the axial direction of the screw rod (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 screw rod (4), the three switches are a closing position switch (6), a separating brake position switch (7) and an initial position switch (8), the initial position switch (8) is arranged between the closing position switch (6) and the separating brake position switch (7), a trigger part (9) suitable for triggering each switch is fixed on the transmission plate (2)/the moving block (5), when the trigger part (9) is positioned at a position for triggering the initial position switch (8), a gap is reserved between the hole wall of the handle sleeve hole (21) and the breaker handle (3) for manual switching of the breaker handle (3) between the closing position and the separating brake position so as to realize manual switching on-off; when the motor device (1) is controlled to rotate and drive the screw rod (4) to rotate by the control circuit board (05) during electric switching-on or switching-off, the transmission plate (2) and the triggering part (9) are driven to axially and synchronously move along the screw rod (4), when the triggering part (9) moves to trigger the switching-on position switch (6) or the switching-off position switch (7), the transmission plate (2) pushes the breaker handle (3) to a switching-on position or a switching-off position, the control circuit board (05) controls the motor device (1) to reversely rotate after the switching-on position switch (6) or the switching-off position switch (7) is triggered so as to drive the screw rod (4) to reversely rotate, and the transmission plate (2) and the triggering part (9) are driven to reversely move until the control circuit board (05) controls the motor device (1) to stop rotating when the triggering part (9) triggers the initial position switch (8); the upper part of the middle cover (02) is provided with a supporting table top (023) adjacent to the breaker handle (3), the two sides of the transmission plate (2) are provided with limiting parts (06) on the upper part of the middle cover (02), the limiting parts (06) are provided with limiting hook plates (061) in a shape of 7, the limiting hook plates (061) are matched with the supporting table top (023) to limit the transmission plate (2), and the mounting frame (10) is fixed in the first accommodating concave cavity (021) through fixing screws; the side wall of the first accommodating concave cavity (021) is provided with a limiting clamping groove (024), and the mounting frame (10) is provided with a clamping part (102) matched with the limiting clamping groove (024).
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 at an end of the screw rod (4).
3. The mechanical built-in molded case circuit breaker according to claim 2, characterized in that the mounting frame (10) is further provided with a guiding structure for guiding the movement of the moving block (5).
4. A mechanism embedded molded case circuit breaker according to claim 3, characterized in that the guiding structure is a guiding rod (101) arranged on the mounting frame (10) and arranged in the same direction with the screw rod (4), and the moving block (5) is provided with a groove (51) matched with the guiding rod (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810921337.4A CN109243928B (en) | 2018-08-04 | 2018-08-04 | Mechanism embedded molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810921337.4A CN109243928B (en) | 2018-08-04 | 2018-08-04 | Mechanism embedded molded case circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109243928A CN109243928A (en) | 2019-01-18 |
| CN109243928B true CN109243928B (en) | 2023-09-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810921337.4A Active CN109243928B (en) | 2018-08-04 | 2018-08-04 | Mechanism embedded molded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109243928B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110556274A (en) * | 2019-08-23 | 2019-12-10 | 浙江智轩电气有限公司 | Circuit breaker |
| CN113725031A (en) * | 2020-05-26 | 2021-11-30 | 天津首瑞智能电气有限公司 | Electric switch |
| CN114068259A (en) * | 2020-08-06 | 2022-02-18 | 上海正泰智能科技有限公司 | Electric operating mechanism of reclosing circuit breaker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU44766A1 (en) * | 1962-11-08 | 1964-01-07 | ||
| CN105609383A (en) * | 2016-03-23 | 2016-05-25 | 德力西电气有限公司 | Opening-closing operation control device and circuit breaker |
| CN209822577U (en) * | 2018-08-04 | 2019-12-20 | 佳一电气有限公司 | Mechanism embedded type molded case circuit breaker |
-
2018
- 2018-08-04 CN CN201810921337.4A patent/CN109243928B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU44766A1 (en) * | 1962-11-08 | 1964-01-07 | ||
| CN105609383A (en) * | 2016-03-23 | 2016-05-25 | 德力西电气有限公司 | Opening-closing operation control device and circuit breaker |
| CN209822577U (en) * | 2018-08-04 | 2019-12-20 | 佳一电气有限公司 | Mechanism embedded type molded case circuit breaker |
Also Published As
| Publication number | Publication date |
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| CN109243928A (en) | 2019-01-18 |
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