Manual self-locking mechanism of molded case circuit breaker

Abstract

The utility model discloses a manual self-locking mechanism of a molded case circuit breaker, which comprises a seat body and a cover body covering the seat body, an electric operating mechanism is arranged in the seat body, the electric operating mechanism comprises a speed reduction shell and a speed reduction motor unit arranged in the speed reduction shell, an operating shaft body and a rotating lock body which are exposed out of the cover body are arranged in the seat body, and the rotating lock body is arranged in the seat body. A sliding cover capable of covering the operation shaft body is arranged in the seat body, a push block exposed out of the cover body is arranged on the sliding cover, a transmission gear driven by a speed reduction motor unit is arranged on the speed reduction shell, a meshing gear meshed with the transmission gear is arranged on the operation shaft body, a mounting frame is fixedly arranged in the seat body, and the rotating lock body is rotationally arranged on the mounting frame. A guide groove and an arc-shaped groove communicated with the guide groove are formed in the mounting frame. According to the utility model, the structural design is reasonable, and the sliding cover can be limited by improving the structures of the sliding cover and the mounting frame, so that the safety during manual operation is ensured, and the potential safety hazard caused by misoperation is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electrical apparatus technical field, more specifically, relate to a kind of hand self-locking mechanism of moulded case circuit breaker. BACKGROUND

[0002] The existing moulded case circuit breaker with energy storage type electric operating mechanism generally has free tripping, reclosing and closing states, and the operating form of the energy storage type electric operating mechanism generally has manual and automatic two kinds, and the two can be switched and operate the circuit breaker matched therewith, wherein the energy storage is that electric energy is stored in compressed spring by motor and speed reduction mechanism, and the stored energy is released instantaneously to push the circuit breaker handle when needed, to realize the closing operation of the moulded case circuit breaker. In manual state, the energy storage mechanism is energized by operating the manual operating mechanism, that is, the reclosing operation of the matched circuit breaker is completed, to prepare for the next closing. In automatic state, an electric signal is given to the electric operation, and the motor is driven by multi-stage transmission gear to realize the energy storage operation of the energy storage mechanism, and the reclosing operation of the matched circuit breaker is completed synchronously, to prepare for the next closing. The above-mentioned manual state is suitable for on-site operation, and the operator can operate the circuit breaker on site. The automatic state is suitable for remote operation, and the operator can operate the electric operation mechanism remotely through communication control to realize the closing and opening operation of the circuit breaker.

[0003] And in the manual and automatic operation of the electric operating mechanism, the manual operation and the automatic operation need to be distinguished, to prevent confusion in manual and automatic operation, and a corresponding locking mechanism is needed to limit the corresponding operation, to prevent the safety hazard caused by misoperation of the moulded case circuit breaker. UTILITY MODEL CONTENTS

[0004] The utility model overcomes the deficiency of prior art, and the structure design is reasonable, the limit of sliding cover can be realized by improving the structure of sliding cover and mounting frame, to ensure the safety in manual operation, and reduce the safety hazard caused by misoperation.

[0005] To achieve the above object, the utility model provides the following technical scheme.

[0006] The hand-automatic locking mechanism of the molded case circuit breaker comprises a base body and a cover body arranged on the base body, the base body is internally provided with an electric operating mechanism, the electric operating mechanism comprises a reduction shell and a reduction motor unit arranged in the reduction shell, the base body is internally provided with an operating shaft body and a rotating lock body exposed to the cover body, the base body is internally provided with a sliding cover capable of covering the operating shaft body, the sliding cover is provided with a push block exposed to the cover body, the reduction shell is provided with a transmission gear driven by the reduction motor unit, the operating shaft body is provided with an engagement gear engaged with the transmission gear, the base body is fixedly provided with a mounting frame, the rotating lock body is rotatably arranged on the mounting frame, the mounting frame is provided with a guide groove and an arc-shaped groove communicated with the guide groove, the sliding cover is slidably arranged between the reduction shell and the cover body, the sliding cover is provided with a guide section located in the guide groove, the guide section is provided with a lock groove, and the rotating lock body is provided with a lock block capable of moving in the arc-shaped groove and located in the lock groove.

[0007] By adopting the above technical scheme, the transmission gear is rotated to drive other components of the electric operating mechanism to realize the switching of the free tripping, re-tripping and closing states of the circuit breaker. When automatic operation is performed, the reduction motor unit drives the transmission gear to rotate; when manual operation is performed, a special tool is inserted into the operating shaft body to rotate the operating shaft body, and the engagement gear drives the transmission gear to rotate. Since the sliding cover is arranged, the operating shaft body is covered by rotating the push block, and manual operation cannot be performed at this time. By arranging the rotating lock body, the key is inserted into the rotating lock body and the rotating lock body is rotated, the lock block rotates with the rotating lock body, the lock block moves along the arc-shaped groove and is located in the lock groove, thereby limiting the sliding cover, and the safety during manual operation is ensured to prevent misoperation.

[0008] Preferably, the communication part of the guide groove and the arc-shaped groove is provided with a slot, the arc-shaped groove extends into the guide groove, the end of the guide section away from the push block is provided with an abutting portion, the abutting portion can abut against the lock block located in the guide groove, the lock groove is arranged on the side wall of the guide section close to the slot, and the abutting portion is arranged at the top end of the side of the guide section close to the lock groove.

[0009] By adopting the above technical scheme, the slot is arranged to better realize the communication of the guide groove and the arc-shaped groove, so that the lock block can be located in the guide groove when moving in the arc-shaped groove. When the sliding cover is slid to expose the operating shaft body, the lock block is rotated and moved to the lock groove, so as to limit the sliding of the sliding cover; when the sliding cover is slid to cover the operating shaft body, the rotating lock body is rotated, the lock block is located in the guide groove, and the abutting portion abuts against the lock block, thereby limiting the sliding of the sliding cover.

[0010] Preferably, the reduction shell is provided with a sliding groove, the end of the sliding groove is provided with an extension slot, the sliding cover is provided with a sliding block slidably arranged in the sliding groove, and the side of the sliding block is provided with an extension section capable of being located in the extension slot.

[0011] By adopting the technical scheme, the cooperation of the sliding block and the sliding groove can realize the sliding of the sliding cover, of course, the sliding structure can be arranged between the sliding cover and the cover body, so as to further improve the sliding stability of the sliding cover, and the cooperation of the extension section and the extension groove facilitates the sliding cover to be located in the sliding groove more conveniently during installation.

[0012] Preferably, the sliding cover is provided with an opening, a flexible strip is arranged at the position of the opening, a protrusion is arranged on the flexible strip, and the cover body is provided with at least two grooves matched with the protrusion.

[0013] By adopting the technical scheme, the grooves can be two, corresponding to the covering and exposure of the operation shaft body by the sliding cover, the flexible strip can be separated from one groove and located in the other groove, and the operation hand feeling is provided when the push block is operated. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of a specific embodiment of the utility model;

[0015] Figure 2 It is a structural schematic view of a specific embodiment of the utility model without the cover body;

[0016] Figure 3 It is a partial structural schematic view of a specific embodiment of the utility model reflecting the cover body;

[0017] Figure 4 It is a structural schematic view of a specific embodiment of the utility model reflecting the mounting frame and the sliding cover;

[0018] Figure 5 It is a structural schematic view of a specific embodiment of the utility model reflecting the reduction shell.

[0019] In the figure: 1, seat body; 2, cover body; 21, groove; 3, reduction shell; 31, transmission gear; 32, sliding groove; 33, extension groove; 4, operation shaft body; 41, meshing gear; 5, rotating lock body; 51, lock block; 6, sliding cover; 61, push block; 62, guide section; 63, lock groove; 64, abutment part; 65, sliding block; 66, extension section; 67, opening; 68, flexible strip; 69, protrusion; 7, mounting frame; 71, guide groove; 72, arc-shaped groove; 73, slotted. DETAILED DESCRIPTION

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1-5 As shown, a manual / automatic locking mechanism for a molded case circuit breaker includes a base 1 and a cover 2 disposed on the base 1. An electric operating mechanism is installed inside the base 1, comprising a reduction gear housing 3 and a reduction motor unit disposed within the reduction gear housing 3. An operating shaft 4 and a rotary lock 5 are disposed inside the base 1, protruding from the cover 2. A sliding cover 6 is provided inside the base 1 to cover the operating shaft 4. A push block 61 protruding from the cover 2 is provided on the sliding cover 6. A transmission gear 31 driven by the reduction motor unit is provided on the reduction gear housing 3. The operating shaft 4 is provided with a meshing gear 41 that meshes with the transmission gear 31. The mounting bracket 7 is fixedly installed inside the base 1. The rotating lock body 5 is rotatably installed on the mounting bracket 7. The mounting bracket 7 is provided with a guide groove 71 and an arc groove 72 that communicates with the guide groove 71. The sliding cover 6 is slidably installed between the deceleration housing 3 and the cover 2. The sliding cover 6 is provided with a guide section 62 located in the guide groove 71. The guide section 62 is provided with a locking groove 63. The rotating lock body 5 is provided with a locking block 51 that can move in the arc groove 72 and is located in the locking groove 63.

[0022] By adopting the above technical solution, the rotation of the transmission gear will drive the other components of the electric operating mechanism to move, thereby realizing the switching of the circuit breaker's free tripping, re-tripping, and closing states. During automatic operation, the transmission gear 31 is driven to rotate by the geared motor unit; during manual operation, a special tool is inserted into the operating shaft 4, and the operating shaft 4 is rotated, driving the transmission gear 31 to rotate through the meshing gear 41. Due to the sliding cover 6, the operating shaft 4 is covered by the push block 61, preventing manual operation. However, by providing a rotating lock body 5, when the key is inserted into the rotating lock body 5 and the rotating lock body 5 is rotated, the lock block 51 rotates with the rotating lock body 5, moves along the arc-shaped groove 72, and is located in the lock groove 63, thereby limiting the sliding cover 6. This ensures safety during manual operation and prevents accidental operation.

[0023] And, the communication place of the guide groove 71 and the arc-shaped groove 72 is provided with a slot 73, the arc-shaped groove 72 extends into the guide groove 71, the guide segment 62 is provided with an abutting part 64 away from the end of the push block 61, the abutting part 64 can abut with the lock block 51 in the guide groove 71, the lock groove 63 is arranged on the side wall of the guide segment 62 close to the slot 73, and the abutting part 64 is arranged on the top end of the side of the guide segment 62 close to the lock groove 63. The slot 73 is better to realize the communication of the guide groove 71 and the arc-shaped groove 72, so that the lock block 51 can be located in the guide groove 71 when moving in the arc-shaped groove 72. When the sliding cover 6 slides to expose the operating shaft body 4, the lock block 51 is rotated and moved into the lock groove 63, so as to limit the sliding of the sliding cover 6; when the sliding cover 6 slides to cover the operating shaft body 4, the rotating lock body 5 is rotated, the lock block 51 is located in the guide groove 71, and the lock block 51 abuts against the abutting part 64, so as to limit the sliding of the sliding cover 6.

[0024] And the sliding groove 32 is arranged on the deceleration shell 3, the end of the sliding groove 32 is provided with an extension groove 33, the sliding block 65 is arranged on the sliding cover 6 and slides in the sliding groove 32, and the side of the sliding block 65 is provided with an extension segment 66 located in the extension groove 33. The cooperation of the sliding block 65 and the sliding groove 32 can realize the sliding of the sliding cover 6, of course, the sliding structure can also be arranged between the sliding cover 6 and the cover body 2, so as to further improve the sliding stability of the sliding cover 6, and the cooperation of the extension segment 66 and the extension groove 33 facilitates the sliding cover 6 to be located in the sliding groove 32 more conveniently during installation.

[0025] In addition, the sliding cover 6 is provided with an opening 67, the position of the sliding cover 6 in the opening 67 is provided with a flexible strip 68, the flexible strip 68 is provided with a protruding block 69, and the cover body 2 is provided with at least two recesses 21 matched with the protruding block 69. In this way, the recess 21 can be provided with two, corresponding to the sliding cover 6 covering and exposing the operating shaft body 4, the flexible strip 68 can be separated from one of the recesses 21 and located in the other recess 21, and the operation hand feeling is provided when the push block 61 is operated.

[0026] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the application concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A manual and automatic locking mechanism of a molded case circuit breaker, comprising a base body (1) and a cover body (2) arranged on the base body (1), wherein an electric operating mechanism is arranged in the base body (1), the electric operating mechanism comprising a reduction gear housing (3) and a reduction motor unit arranged in the reduction gear housing (3), an operating shaft body (4) and a rotating lock body (5) exposed to the cover body (2) are arranged in the base body (1), a sliding cover (6) capable of covering the operating shaft body (4) is arranged in the base body (1), and a push block (61) exposed to the cover body (2) is arranged on the sliding cover (6), characterized in that, The transmission gear (31) driven by the reduction motor unit is arranged on the reduction shell (3), the meshing gear (41) meshing with the transmission gear (31) is arranged on the operation shaft body (4), the mounting frame (7) is fixedly arranged in the seat body (1), the rotating lock body (5) is rotatably arranged on the mounting frame (7), the guide groove (71) and the arc-shaped groove (72) communicating with the guide groove (71) are arranged on the mounting frame (7), the sliding cover (6) is slidably arranged between the reduction shell (3) and the cover body (2), the guide section (62) located in the guide groove (71) is arranged on the sliding cover (6), the lock groove (63) is arranged on the guide section (62), the lock block (51) movably arranged in the arc-shaped groove (72) and located in the lock groove (63) is arranged on the rotating lock body (5).

2. The manual / automatic locking mechanism of a molded case circuit breaker according to claim 1, wherein The communication part of the guide groove (71) and the arc-shaped groove (72) is provided with the slot (73), and the arc-shaped groove (72) extends into the guide groove (71).

3. The manual / automatic locking mechanism of a molded case circuit breaker according to claim 2, wherein The end of the guide section (62) away from the push block (61) is provided with the abutting portion (64), and the abutting portion (64) can abut against the lock block (51) located in the guide groove (71).

4. The manual / automatic locking mechanism of a molded case circuit breaker according to claim 3, wherein The lock groove (63) is arranged on the side wall of the guide section (62) close to the slot (73), and the abutting portion (64) is arranged on the top end of the guide section (62) close to the lock groove (63).

5. A manual / automatic locking mechanism of a molded case circuit breaker according to claim 1 or 2 or 3, wherein The sliding groove (32) is arranged on the reduction shell (3), the end of the sliding groove (32) is provided with the extension groove (33), the sliding block (65) slidably arranged in the sliding groove (32) is arranged on the sliding cover (6), and the extension section (66) located in the extension groove (33) is arranged on the side of the sliding block (65).

6. The manual / automatic locking mechanism of a molded case circuit breaker according to claim 4, wherein The sliding cover (6) is provided with the opening (67), the flexible strip (68) is arranged at the position of the sliding cover (6) located in the opening (67), the protrusion (69) is arranged on the flexible strip (68), and the cover body (2) is provided with at least two recesses (21) matched with the protrusion (69).

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