Operating mechanism for molded case circuit breaker and molded case circuit breaker equipment

Abstract

The utility model relates to an operating mechanism for a molded case circuit breaker and molded case circuit breaker equipment. The operating mechanism includes: a housing; a motor providing power in an electric mode of the operating mechanism; the driving gear is operably connected to the motor and can be driven by the motor to rotate; the driven gear is meshed with the driving gear in an electric mode and can be driven by the driving gear to rotate; the rotating piece is operably connected to the driven gear and can be driven by the driven gear to rotate; and the extension rod is fixedly mounted on a handle of the molded case circuit breaker, and in the electric mode, when the rotating piece rotates, the rotating piece can push and press the extension rod to enable the extension rod to rotate, and then the handle of the molded case circuit breaker is driven to rotate.

Description

TECHNICAL FIELD

[0001] The present application relates to an operating mechanism for a molded case circuit breaker and a molded case circuit breaker device. BACKGROUND

[0002] The operating mechanism of the molded case circuit breaker is capable of switching between an electric mode and a manual mode. In the electric mode, the motor generally drives the handle of the molded case circuit breaker through a driving sliding mechanism, which results in a complicated driving process. In addition, in the manual mode, the existing operating mechanism allows the user to switch the state of the circuit breaker by inserting an additional handle into an operating hole. However, the handle can be rotated in both directions in the manual mode, which can cause potential safety problems and false indications. SUMMARY

[0003] The present application provides an operating mechanism for a molded case circuit breaker, which is installed to a housing of the molded case circuit breaker, configured to operate a handle of the molded case circuit breaker, and capable of switching between an electric mode and a manual mode, the operating mechanism comprising:

[0004] a housing;

[0005] a motor, which provides power in the electric mode of the operating mechanism;

[0006] a driving gear, which is operatively connected to the motor and is capable of being rotated by the motor;

[0007] a driven gear, which is engaged with the driving gear in the electric mode and is capable of being rotated by the driving gear;

[0008] a rotating member, which is operatively connected to the driven gear and is capable of being rotated by the driven gear;

[0009] an extension rod, which is fixedly installed to the handle of the molded case circuit breaker, and in the electric mode, the rotating member is capable of pushing and rotating the extension rod when the rotating member is rotated, thereby driving the handle of the molded case circuit breaker to rotate.

[0010] Advantageously, the housing is provided with a face cover and an opening, the face cover is configured to be able to translate between a first position and a second position, in the first position, the face cover covers the opening, and an external handle cannot be inserted into the opening to be connected with the extension rod, and the operating mechanism is in the electric mode, in the second position, the face cover exposes the opening, and the external handle can be inserted into the opening to be connected with the extension rod, and the operating mechanism is in the manual mode.

[0011] Advantageously, the rotating member has a waist-shaped hole, a portion of the extension rod extends through the waist-shaped hole, during the operation mechanism switches the handle of the molded case circuit breaker from the open position to the closed position in the electric mode, the motor drives the driving gear to rotate, then the driven gear and the rotating member rotate, so that the first end of the waist-shaped hole of the rotating member abuts against the extension rod and pushes the extension rod to rotate, thereby driving the handle of the molded case circuit breaker to rotate,

[0012] After the rotating member rotates a predetermined angle so that the handle of the molded case circuit breaker passes through the dead point position, the rotating member stops rotating, the handle of the molded case circuit breaker continues to rotate to the closed position under the action of its own energy storage spring, so that the extension rod rotates in the waist-shaped hole to disengage from the abutment with the first end of the waist-shaped hole and not abut against the opposite second end of the waist-shaped hole, at this time, the extension rod is away from the first end of the waist-shaped hole by a first angular gap and away from the second end of the waist-shaped hole by a second angular gap.

[0013] Advantageously, the operation mechanism further comprises a support frame fixedly installed to the housing, a compression spring is arranged on the support frame and abuts between the rotating member and the support frame,

[0014] During the operation mechanism switches the handle of the molded case circuit breaker from the open position to the closed position in the electric mode, the rotation of the rotating member compresses the compression spring, after the rotating member rotates a predetermined angle and stops rotating, the compression spring releases energy to make the rotating member reversely rotate another predetermined angle, so that the first angular gap increases and the second angular gap decreases.

[0015] Advantageously, the operation mechanism further comprises a clutch rod, the clutch rod is rotatably installed to the housing and operably connected to the driven gear, the clutch rod is configured to be able to rotate between a first posture and a second posture, when the clutch rod is in the first posture, the driven gear meshes with the driving gear, the operation mechanism is in the electric mode, when the clutch rod rotates from the first posture towards the second posture, the clutch rod pushes the driven gear to translate away from the driving gear, so that the driven gear gradually disengages from the meshing with the driving gear, in the second posture of the clutch rod, the driven gear completely disengages from the meshing with the driving gear, the operation mechanism is in the manual mode.

[0016] Advantageously, the driven gear has:

[0017] a first portion towards the driving gear, the first portion is configured to mesh with the driving gear;

[0018] a second portion away from the driving gear, the second portion is configured to cooperate with the rotating member, the second portion has a first arc-shaped tooth and a second arc-shaped tooth;

[0019] a groove between the first portion and the second portion, a portion of the clutch rod is capable of being inserted into the groove, so as to be capable of pushing the driven gear to translate.

[0020] Advantageously, the rotating member has a mating portion with a first arcuate arm having a first side and a second side opposite along the arcuate profile of the first arcuate arm, and a second arcuate arm having a third side and a fourth side opposite along the arcuate profile of the second arcuate arm,

[0021] The first arcuate teeth of the second portion are located between the first side of the first arcuate arm and the third side of the second arcuate arm, and the second arcuate teeth of the second portion are located between the second side of the first arcuate arm and the fourth side of the second arcuate arm.

[0022] The first side of the first arcuate arm is provided with a first compression spring, and the third side of the second arcuate arm is provided with a second compression spring, so that the first arcuate teeth of the second portion are spaced apart from the first side and the third side by a predetermined angular gap and can rotate between the first side and the third side.

[0023] Advantageously, the teeth of the driving gear have a first inclined surface, and the teeth of the first portion of the driven gear have a second inclined surface, the first inclined surface and the second inclined surface being opposite to each other.

[0024] Advantageously, the operating mechanism further comprises an auxiliary contact located on the path of the clutch lever rotating from the first posture to the second posture, so that when the clutch lever reaches the second posture, the auxiliary contact is pressed, and the auxiliary contact is electrically connected to the control circuit of the motor, thereby causing the motor to be powered off.

[0025] Advantageously, the operating mechanism further comprises a first auxiliary contact and a second auxiliary contact, both of which are arranged on the rotating path of the rotating member and are electrically connected to the control circuit of the motor. In the electric mode, when the rotating member drives the extension rod and in turn drives the handle of the molded case circuit breaker to rotate to the closed position, a part of the rotating member presses the first auxiliary contact. When the rotating member drives the extension rod and in turn drives the handle of the molded case circuit breaker to rotate to the open position, a part of the rotating member presses the second auxiliary contact.

[0026] Advantageously, the cover has a transparent portion, and in the first position of the cover, the cover covers the opening so that the transparent portion overlaps the opening.

[0027] Advantageously, the housing is further provided with an open position indicator, a closed position indicator and a tripped position indicator, and when the handle of the molded case circuit breaker is in the open position, the closed position and the tripped position, the position of the extension rod is respectively matched with the open position indicator, the closed position indicator and the tripped position indicator.

[0028] Advantageously, the extension rod is provided with a sealing plate located inside the opening on the housing and extending along the length direction of the opening, and the sealing plate is designed to be able to shield the opening during the rotation of the extension rod. BRIEF DESCRIPTION OF DRAWINGS

[0029] The above and other features and advantages of the exemplary embodiments of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, in which:

[0030] Figure 1 A perspective view of an operating mechanism according to the present application is shown, the operating mechanism being in the motorized mode.

[0031] Figure 2 A perspective view of an operating mechanism according to the present application is shown, the operating mechanism being in the manual mode and the external handle having been connected to the extension lever.

[0032] Figure 3 A plan view of an operating mechanism according to the present application is shown, the internal structure of the operating mechanism being shown, the operating mechanism being in the motorized mode.

[0033] Figure 4 A plan view of an operating mechanism according to the present application is shown, the internal structure of the operating mechanism being shown, the operating mechanism being in the manual mode.

[0034] Figure 5 A partial perspective view of an operating mechanism according to the present application is shown, the operating mechanism being in the motorized mode, the extension lever being rotated by the operating mechanism from the open position to the closed position by a predetermined angle.

[0035] Figure 6 A partial perspective view of an operating mechanism according to the present application is shown, the operating mechanism being in the motorized mode, the handle of the molded case circuit breaker being rotated to the closed position by its own energy storage spring after the extension lever has been rotated from the open position to the closed position by a predetermined angle.

[0036] Figure 7 A partial perspective view of an operating mechanism according to the present application is shown, the operating mechanism being in the motorized mode, the handle of the molded case circuit breaker being rotated to the closed position by its own energy storage spring after the extension lever has been rotated from the open position to the closed position by a predetermined angle and the rotating member being counter-rotated by another predetermined angle by its compression spring.

[0037] Figure 8 A corresponding schematic view is shown. Figure 6

[0038] A corresponding schematic view is shown. Figure 9 Figure 7 A corresponding schematic view is shown.

[0039] Figure 10 A corresponding schematic view is shown.

[0040] ​Figure 11 A perspective view of the drive gear is shown.

[0041] Figure 12 A perspective view of the driven gear is shown.

[0042] Figure 13 A perspective view of the rotating member is shown.

[0043] Figure 14 Another perspective view of the rotating member is shown.

[0044] Figure 15 A schematic view of the clutch lever in a second position is shown.

[0045] Figure 16 A schematic view of the rotating member in abutment with the first auxiliary contact is shown.

[0046] Figure 17 A view of the teeth of the first portion of the driven gear not aligned with the tooth gaps of the drive gear when in manual mode is shown.

[0047] Figure 18 An enlarged view of the teeth of the first portion of the driven gear not aligned with the tooth gaps of the drive gear when in manual mode is shown, along with the compression spring of the engaging portion of the rotating member.

[0048] Figure 19 A view of the compression spring of the engaging portion of the rotating member is shown.

[0049] Figure 20 A view of the sealing plate disposed on the extension lever is shown.

[0050] Figure 21 A perspective view of the operating mechanism mounted to the molded case circuit breaker is shown. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the technical solutions of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below in combination with the accompanying drawings of the embodiments of the present disclosure. The same reference signs in the drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without the need for creative labor fall within the scope of protection of the present disclosure.

[0052] Compared with the embodiments shown in the drawings, the feasible implementation solutions within the protection scope of the present disclosure can have fewer components, have other components not shown in the drawings, have different components, have differently arranged components or differently connected components, etc. In addition, two or more components in the drawings can be implemented in a single component, or a single component shown in the drawings can be implemented as multiple separate components.

[0053] Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description of the disclosure presented herein and the claims that follow is not intended to be limiting of the disclosure. Unless otherwise defined, all terms of art used herein have the same meaning as commonly used in the art to which this disclosure belongs. It will be appreciated that any form of hardware or software described herein can be replaced by an equivalent form of hardware or software to achieve the same functionality. The use of "first", "second" and like designations is not intended to imply an order of importance, but to distinguish one from another. Unless otherwise specified, the number of components can be one or more; similarly, the terms "one", "said" and "the" are not necessarily limited to a single component. The terms "comprise", "comprising", "comprises" and like terms mean that the elements or objects listed after the term are included in the composition, process, method, or apparatus comprising the term, but do not exclude other elements or objects. The terms "upper", "lower", "left", "right" and the like are used to indicate relative positions of the device when in use or the positions shown in the drawings, and the relative positions can change accordingly when the absolute positions of the described objects change.

[0054] Figure 1 and Figure 2 respectively show perspective views of the operating mechanism according to the present application in the electric mode and in the manual mode. The operating mechanism has a housing 1 and a face cover 2 arranged on the housing 1, the housing being provided with an opening 11, the face cover 2 being able to translate between a first position and a second position, in the first position, the face cover covers the opening 11, as shown in Figure 1 , so as not to allow an external handle 3 to be inserted into the opening of the housing for operation, the operating mechanism being in the electric mode. In the second position, the face cover exposes the opening 11, as shown in Figure 2 , so as to allow the external handle 3 to be inserted into the opening of the housing for operation, the operating mechanism being in the manual mode.

[0055] The face cover 2 is provided with a transparent portion 21, in the first position of the face cover, the face cover covers the opening, so that the transparent portion 21 overlaps the opening, so that the extension rod inside the opening can be observed.

[0056] The housing 1 is further provided with an open state indicator On, a closed state indicator Off and a tripped state indicator Trip, when the handle of the molded case circuit breaker is in the open position, the closed position and the tripped position, the position of the extension rod is respectively matched with the open state indicator, the closed state indicator and the tripped state indicator.

[0057] The operating mechanism includes a motor (not shown) arranged in the housing 1, a driving gear 4 (as shown in Figure 11 ), a driven gear 5, a rotating member 6 and an extension rod 7, the extension rod 7 is fixedly installed to the handle of the molded case circuit breaker. As Figure 3As shown, the operating mechanism is in the electric mode, the driving gear 4 is engaged with the driven gear 5. At this time, the motor can drive the driving gear 4 to rotate, and in turn drive the driven gear 5 and the rotating member 6 to rotate, so that the rotating member 6 pushes the extension rod 7 to rotate the handle of the MCCB between the open position and the closed position. The rotating member 6 has a waist-shaped hole 62, and the extension rod 7 extends through the waist-shaped hole.

[0058] The operating mechanism further comprises a clutch rod 8, which is operably connected to the driven gear 5 and is configured to be rotatable between a first posture (as shown in Figure 3 ) and a second posture (as shown in Figure 4 ). When the clutch rod rotates from the first posture to the second posture, the clutch rod 8 pushes the driven gear 5 to translate away from the driving gear 4 and gradually disengage from the driving gear. In the second posture of the clutch rod, as shown in Figure 4 , the driven gear is completely disengaged from the driving gear, and the operating mechanism can be switched to the manual mode.

[0059] In the present example, as shown in Figure 12 , the driven gear has a first portion 51 facing the driving gear, a second portion 52 away from the driving gear, and a groove 53 between the first portion and the second portion. A portion of the clutch rod is inserted into the groove 53, so as to be able to push the driven gear to translate.

[0060] The second portion 52 of the driven gear is configured to cooperate with the cooperating portion 61 of the rotating member 6, and the second portion has a first arc-shaped tooth 521 and a second arc-shaped tooth 522. As shown in Figure 13 and Figure 14 , the cooperating portion 61 of the rotating member 6 has a first arc-shaped arm 611 and a second arc-shaped arm 612, the first arc-shaped arm 611 has a first side surface 6111 and a second side surface opposite along the arc-shaped profile of the first arc-shaped arm, and the second arc-shaped arm has a third side surface 6121 and a fourth side surface opposite along the arc-shaped profile of the second arc-shaped arm. The first arc-shaped tooth 521 of the second portion of the driven gear is located between the first side surface 6111 of the first arc-shaped arm and the third side surface 6121 of the second arc-shaped arm, and the second arc-shaped tooth 522 of the second portion is located between the second side surface of the first arc-shaped arm and the fourth side surface of the second arc-shaped arm.

[0061] The process that the operating mechanism operates the MCCB to switch from the open state to the closed state in the electric mode is described below.

[0062] The motor drives the driving gear 4, the driven gear 5 and the rotating member 6 to rotate, and the rotation of the rotating member 6 causes the first end of the waist-shaped hole 62 to abut against the extension rod 7, thereby pushing the extension rod 7 to rotate. After rotating by a predetermined angle, as shown in Figure 5As shown, at this point, extension rod 7 is at its dead position. Next, the rotating component stops rotating, meaning the motor stops driving. Extension rod 7, along with the handle of the molded case circuit breaker, continues to rotate towards the closing position under the action of the circuit breaker's own energy storage spring. Extension rod 7 disengages from its contact with the first end of the oblong hole and rotates within the oblong hole, reaching the position shown... Figure 6 The closed position is shown. At this time, the extension rod 7 is at a first angular clearance from the first end of the oblong hole and at a second angular clearance from the opposite second end of the oblong hole. This can be achieved by reasonably designing the size of the oblong hole.

[0063] Based on the above process, those skilled in the art will understand how to switch a molded case circuit breaker from the closed state to the open state; therefore, this article will not elaborate further.

[0064] When the circuit breaker is closed, if a fault occurs and the molded case circuit breaker needs to trip, the extension rod will rotate in the opposite direction to the tripping position. To prevent the extension rod from colliding with the rotating component and causing damage, the operating mechanism also includes a compression spring 9, which is mounted on the support frame 91 and abuts against the rotating component 6 and the support rod 91.

[0065] like Figure 8 As shown, it is similar to Figure 6 Correspondingly, at this point, the rotating component has rotated by a predetermined angle and stopped rotating. During rotation, the rotating component gradually compresses the compression spring 9. When the rotating component stops rotating, the compression spring 9 releases its energy, causing the rotating component to rotate in the opposite direction by another predetermined angle, reaching the desired position. Figure 9 The location shown Figure 9 Corresponding to Figure 7 This increases the first angular gap and decreases the second angular gap.

[0066] Figure 10 The diagram shows the extension rod 7 in the disengaged position. It can be seen that, through the design of this application, the extension rod 7 will not collide with the rotating part in the disengaged position.

[0067] The operating mechanism also includes an auxiliary contact 10 (e.g., a micro switch) located on the path of the clutch lever 8 as it rotates from the first position to the second position, such that the auxiliary contact is pressed when the clutch lever reaches its second position. Figure 15 As shown, the auxiliary contact is electrically connected to the motor's control circuit, thereby de-energizing the motor. How the auxiliary contact is electrically connected to the control circuit and how it de-energizes the motor are well known to those skilled in the art and are not the focus of this application; therefore, they will not be described further herein.

[0068] The operating mechanism further comprises a first auxiliary contact 12 and a second auxiliary contact 13 disposed on the housing and arranged on the rotation path of the rotating member 6, and electrically connected to the control circuit of the motor. In the electric mode, when the rotating member 6 drives the extension rod 7 and further drives the handle of the MCCB to rotate to the closed position, a portion 62 of the rotating member 6 presses against the first auxiliary contact 12, as shown in Figure 16 Correspondingly, when the rotating member drives the extension rod and further drives the handle of the MCCB to rotate to the open position, a portion of the rotating member presses against the second auxiliary contact 13. Similar to the auxiliary contact 9, the connection of the first and second auxiliary contacts with the control circuit will not be described again.

[0069] In the manual mode, the driven gear is disengaged from the driving gear. In the event that it is desired to operate in the electric mode, the driven gear needs to be driven to translate by the clutch rod 8 to engage with the driving gear. However, in this case, there is a situation that the driven gear cannot engage with the driving gear, for example, the teeth of the first portion of the driven gear are not aligned with the tooth space of the driving gear, but are aligned with the teeth of the driving gear, as shown in Figure 17 and Figure 18 At this time, if the driven gear is driven to translate towards the driving gear by the clutch rod 8, it can not be translated. Therefore, in order to avoid this situation, the present application is provided with a first compression spring 6112 on the first side surface 6111 of the first arc-shaped arm 611 and a second compression spring 6122 on the third side surface 6121 of the second arc-shaped arm 612, so that the first arc-shaped teeth 521 of the second portion are spaced apart from the first and third side surfaces by a predetermined angular gap.

[0070] When the above-mentioned situation occurs, the first arc-shaped teeth 521 can rotate between the first and third side surfaces to compress the corresponding compression springs, so that the teeth of the first arc-shaped teeth 521 are aligned with the tooth space of the driving gear. Thus, the clutch rod 8 can drive the driven gear to engage with the driving gear.

[0071] In addition, in order to facilitate the engagement of the driven gear with the driving gear, the teeth of the driving gear have a first inclined surface, as shown in Figure 11 and the teeth of the first portion of the driven gear have a second inclined surface, the first and second inclined surfaces being opposite to each other. In this way, when the driven gear translates towards the driving gear, the first and second inclined surfaces contact each other, so that the teeth of the driven gear are smoothly moved into the tooth space of the driving gear.

[0072] In the manual mode of the operating mechanism, the external handle is connected to the extension rod, allowing manual rotation of the external handle to move the extension rod and the handle of the molded case circuit breaker to switch the molded case circuit breaker. During this process, the extension rod drives the rotating component to rotate, which in turn drives the driven gear to rotate. However, at this point, the driven gear has disengaged from the driving gear, so it will not further adversely affect the motor. The process of the manual mode of the operating mechanism will not be described in detail here, but it is similar to that known to those skilled in the art, i.e., manually rotating the external handle to the designated position, thereby rotating the handle of the extension rod and the molded case circuit breaker to the designated position.

[0073] In manual mode, since the opening of the housing is exposed, a sealing plate 71 is provided on the extension rod 7 to prevent foreign objects from entering the housing through the opening, such as... Figure 20 As shown, the sealing plate 71 is located inside the opening of the housing and extends substantially along the length of the opening. The sealing plate is sized to block the opening during the rotation of the extension rod.

[0074] Figure 21 A schematic diagram showing the operating mechanism of the molded case circuit breaker according to this application is provided, thus disclosing the molded case circuit breaker device.

[0075] The operating mechanism of this application simplifies the product structure by using a motor to drive the driving gear to rotate, which in turn drives the driven gear and rotating components to rotate. This application avoids the problem of existing operating mechanisms where the handle can rotate in both directions in manual mode, ensuring that the operation is consistent with the circuit breaker, thus avoiding potential safety risks. The operating mechanism of this application provides clearer and more reliable circuit breaker status indication, avoiding the reliability issues that may arise from existing electric operations. The clutch lever enables mechanical disengagement between electric and manual modes, ensuring more stable switching between them.

[0076] Although the present invention has been described in the specification and illustrated in the accompanying drawings with reference to various embodiments, those skilled in the art will understand that the above embodiments are merely preferred embodiments, and some technical features in the embodiments may not be necessary for solving specific technical problems, so these technical features may be omitted or omitted without affecting the solution to the technical problem or the formation of the technical solution; moreover, the features, elements and / or functions of one embodiment may be appropriately combined, combined or coordinated with the features, elements and / or functions of one or more other embodiments, unless such combination, combination or coordination is obviously not feasible.

Claims

1. An operating mechanism for a molded case circuit breaker, the operating mechanism being mounted to a housing of the molded case circuit breaker, configured to operate a handle of the molded case circuit breaker, and being switchable between an electric mode and a manual mode, characterized in that, The operating mechanism comprises: a housing; a motor providing power in an electric mode of the operating mechanism; a driving gear operatively connected to the motor and capable of being driven to rotate by the motor; a driven gear meshing with the driving gear in the electric mode and capable of being driven to rotate by the driving gear; a rotating member operatively connected to the driven gear and capable of being driven to rotate by the driven gear; an extension rod fixedly installed to a handle of the molded case circuit breaker, in the electric mode, the rotating member is capable of pushing the extension rod to rotate the extension rod when the rotating member rotates, and in turn drives the handle of the molded case circuit breaker to rotate.

2. The operating mechanism of claim 1, wherein The housing is provided with a face cover and an opening, the face cover is configured to be able to translate between a first position and a second position, in the first position, the face cover covers the opening, an external handle cannot be inserted into the opening to be connected with the extension rod, the operating mechanism is in the electric mode, in the second position, the face cover exposes the opening, the external handle can be inserted into the opening to be connected with the extension rod, the operating mechanism is in a manual mode.

3. The operating mechanism of claim 2, wherein The rotating member has a waist-shaped hole, a portion of the extension rod extends through the waist-shaped hole, during switching of the handle of the molded case circuit breaker from an open position to a closed position by the operating mechanism in the electric mode, the motor drives the driving gear to rotate, and in turn drives the driven gear and the rotating member to rotate, so that a first end of the waist-shaped hole of the rotating member abuts against the extension rod and pushes the extension rod to rotate, and in turn drives the handle of the molded case circuit breaker to rotate, After the rotating member rotates by a predetermined angle so that the handle of the molded case circuit breaker passes through a dead point position, the rotating member stops rotating, the handle of the molded case circuit breaker continues to rotate to the closed position under the action of a self energy storage spring of the handle, so that the extension rod rotates in the waist-shaped hole to be disengaged from abutting against the first end of the waist-shaped hole and abutting against an opposite second end of the waist-shaped hole, at this time, the extension rod is spaced apart from the first end of the waist-shaped hole by a first angular gap and is spaced apart from the second end of the waist-shaped hole by a second angular gap.

4. The operating mechanism of claim 3, wherein The operating mechanism further comprises a support frame fixedly installed to the housing, a compression spring is arranged on the support frame and abuts between the rotating member and the support frame, During switching of the handle of the molded case circuit breaker from the open position to the closed position by the operating mechanism in the electric mode, the rotation of the rotating member compresses the compression spring, after the rotating member rotates by the predetermined angle and stops rotating, the compression spring releases energy to make the rotating member reversely rotate by another predetermined angle, so that the first angular gap increases and the second angular gap decreases.

5. Operating mechanism according to any one of claims 1 to 4, characterized in that The operating mechanism further comprises a clutch rod rotatably installed to the housing and operatively connected to the driven gear, the clutch rod is configured to be able to rotate between a first posture and a second posture, when the clutch rod is in the first posture, the driven gear meshes with the driving gear, the operating mechanism is in the electric mode, when the clutch rod rotates from the first posture towards the second posture, the clutch rod pushes the driven gear to translate away from the driving gear, so that the driven gear gradually disengages from the meshing with the driving gear, in the second posture of the clutch rod, the driven gear completely disengages from the meshing with the driving gear, the operating mechanism is in the manual mode.

6. The operating mechanism of claim 5, wherein The driven gear has: a first portion towards the driving gear, the first portion is configured to mesh with the driving gear; a second portion facing away from the driving gear, the second portion configured to cooperate with the rotating member, the second portion having a first arcuate tooth and a second arcuate tooth; a recess between the first portion and the second portion, a portion of the clutch lever being able to be inserted into the recess so as to be able to push the driven gear to translate.

7. The operating mechanism of claim 6, wherein the rotating member has a cooperating portion having a first arcuate arm and a second arcuate arm, the first arcuate arm having a first side and a second side opposite along an arcuate profile of the first arcuate arm, the second arcuate arm having a third side and a fourth side opposite along an arcuate profile of the second arcuate arm, the first arcuate tooth of the second portion is located between the first side of the first arcuate arm and the third side of the second arcuate arm, and the second arcuate tooth of the second portion is located between the second side of the first arcuate arm and the fourth side of the second arcuate arm, the first side of the first arcuate arm is provided with a first compression spring, and the third side of the second arcuate arm is provided with a second compression spring, so that the first arcuate tooth of the second portion is spaced apart from the first side and the third side by a predetermined angular gap and is able to rotate between the first side and the third side.

8. The operating mechanism of claim 7, wherein the teeth of the driving gear have a first inclined surface, and the teeth of the first portion of the driven gear have a second inclined surface, the first inclined surface and the second inclined surface being opposite to each other.

9. The operating mechanism of claim 5, wherein the operating mechanism further comprises an auxiliary contact located on a path of the clutch lever rotating from the first posture to the second posture, so that the clutch lever abuts against the auxiliary contact when it reaches the second posture, and the auxiliary contact is electrically connected to a control circuit of the motor, thereby causing the motor to be powered off.

10. The operating mechanism of claim 5, wherein the operating mechanism further comprises a first auxiliary contact and a second auxiliary contact, both of which are arranged on a rotating path of the rotating member and are electrically connected to a control circuit of the motor, in the electric mode, when the rotating member drives the extension rod to rotate the handle of the molded case circuit breaker to the closed position, a portion of the rotating member abuts against the first auxiliary contact, and when the rotating member drives the extension rod to rotate the handle of the molded case circuit breaker to the open position, a portion of the rotating member abuts against the second auxiliary contact.

11. The operating mechanism of claim 2, wherein the cover transparent portion overlaps with the opening when the cover covers the opening in the first position of the cover.

12. The operating mechanism of claim 11, wherein the housing is further provided with an open position indicator, a closed position indicator and a tripped position indicator, and the extension rod is located at the open position indicator, the closed position indicator and the tripped position indicator when the handle of the molded case circuit breaker is in the open position, the closed position and the tripped position, respectively.

13. The operating mechanism of claim 2, wherein the extension rod is provided with a sealing plate located inside the opening on the housing and extending along the length direction of the opening, and the sealing plate is designed to be able to shield the opening during rotation of the extension rod.

14. A molded case circuit breaker device comprising the operating mechanism according to any one of claims 1 to 13 and a molded case circuit breaker.

Images