CN220306196U - Electric operating mechanism - Google Patents

Abstract

The utility model discloses an electric operating mechanism which is arranged on a molded case circuit breaker for use and comprises an upper shell, a mounting rack, a pushing block, an electric driving assembly and a manual driving assembly; the installation frame is provided with a cover plate, a safety lock, a lock rod, a first micro switch and a second micro switch, the push block is provided with a locking part, the lock rod can move up and down between a first position and a second position, and the safety lock is locked and unlocked through rotation; the cover plate, the safety lock, the lock rod and the locking part are matched as follows: when the push block is at the opening position: when the safety lock rotates to lock, the lock rod is driven to move to a first position to limit the cover plate at a closing position; when the safety lock rotates to an unlocking state, the lock rod moves to a second position under the action of a spring to release the limit of the cover plate to enable the cover plate to be opened and closed, and when the cover plate is opened, the lock rod is locked to enable the safety lock to be kept in the unlocking state. The electric operating mechanism is safe and reliable to use and has good protection performance.

Description

Electric operating mechanism

Technical Field

The utility model relates to the field of design of operating mechanisms of molded case circuit breakers, in particular to an electric operating mechanism.

Background

The plastic case circuit breaker is an electric micro-switch device capable of protecting a circuit, and can bear, close and break the current in a normal loop in real time according to the states of the circuit, such as normal, overload, short circuit, undervoltage and the like, so that the safety of the circuit is ensured. The operating mechanism is an important component part of the molded case circuit breaker and is used for controlling the opening (closing) and closing (opening) of the molded case circuit breaker. In order to realize on-site manual control opening and closing and remote automatic control opening and closing of the molded case circuit breaker, a manual driving assembly is arranged on the electric operating mechanism, so that the electric operating mechanism has a manual operation opening and closing function on the basis of the original electric operation opening and closing function. However, the existing electric operating mechanism lacks an effective protection structure, for example, after a worker controls the breaker to break after overhauling a load circuit, it is difficult to ensure that the operating mechanism is always in break before overhauling is completed, misoperation is easy to occur in actual operation, for example, the situation that other people control the electric operating mechanism to close by an electric operation or manual operation mode under the condition of unknowing is easy to cause safety accidents, and therefore the existing electric operating mechanism has the problem of lower safety, and in view of the problem, the structure of the existing electric operating mechanism needs to be improved.

Disclosure of Invention

In this respect, the utility model aims to provide an electric operating mechanism which is safe and reliable to use.

The technical scheme for realizing the aim of the utility model is as follows:

the utility model provides an electric operating mechanism which comprises an upper shell, a mounting frame arranged in the upper shell, a pushing block arranged on the mounting frame, an electric driving assembly and a manual driving assembly, wherein the pushing block is arranged on the mounting frame; the electric driving assembly and the manual driving assembly are in transmission connection with the transmission piece, and drive the pushing block to reciprocate between the opening position and the closing position when the transmission piece rotates; the upper shell is provided with a manual operation hole;

the installation frame is provided with a cover plate, a safety lock, a lock rod, a first micro-switch and a second micro-switch, the push block is provided with a locking part, the cover plate is used for closing and opening the manual operation hole, the lock rod can move up and down between a first position and a second position, the safety lock is used for locking and unlocking switching through rotation, the safety lock triggers the first micro-switch to power off the electric driving assembly when in a locking state, and triggers the second micro-switch to power off the electric driving assembly when in an opening position;

the cover plate, the safety lock, the lock rod and the locking part are matched as follows:

when the push block is at the opening position: the safety lock drives the lock rod to move to a first position when rotating and locking, and the cover plate is limited at a closing position; when the safety lock rotates to an unlocking state, the lock rod moves to a second position under the action of a spring to release the limit of the cover plate to enable the cover plate to be opened and closed, and when the cover plate is opened, the lock rod is locked to enable the safety lock to be kept in the unlocking state;

when the push block is in a closing position: the safety lock is in an unlocking state, the lock rod is in a second position under the action of a spring, the locking part blocks the lock rod to prevent the first position of the lock rod from moving, at the moment, the safety lock is limited by the lock rod and cannot be locked, and meanwhile, the lock rod releases the limitation of the cover plate to enable the cover plate to be opened and closed.

In a further technical scheme, a first locking part and a first triggering part are arranged on the safety lock;

the cover plate is provided with a second locking part and a second triggering part;

the lock rod is provided with a resisting part, a clearance part and a stop part, and the clearance part and the resisting part are arranged in a staggered manner in the up-down direction;

when the push block is at the opening position: when the safety lock is rotationally locked, the first locking part and the stop part are in limit fit to drive the lock rod to move to a first position, at the moment, the stop part and the second locking part are in stop fit to limit the cover plate to a closed position, and the first trigger part triggers the first micro switch; the first locking part releases the limit of the stop part when the safety lock rotates to an unlocking state, the lock rod moves to a second position under the action of a spring, the stop part releases the limit of the second locking part at the moment, meanwhile, the clearance part is positioned on a movable path of the second locking part and can be used for the second locking part to extend in so that a cover plate can be opened and closed, when the cover plate is opened, the second locking part extends into the clearance part and prevents the lock rod from moving to the first position, the stop part resists the first locking part to enable the safety lock not to be locked, and meanwhile, the second triggering part triggers the second micro switch;

when the push block is in a closing position: the safety lock is in an unlocking state, the lock rod is in a second position under the action of a spring, the locking part is positioned below the lock rod to prevent the lock rod from moving to a first position, the stop part resists the first locking part at the moment to enable the safety lock not to be locked, and the clearance part is positioned on a movable path of the second locking part and can be used for the second locking part to extend in, so that the cover plate can be opened and closed.

In a further technical scheme, the safety lock comprises a rotatable lock column and a locking piece connected with the lower end of the lock column, a key hole for a key to be inserted is formed in the upper end of the lock column, a first through hole is formed in the upper shell corresponding to the upper end of the safety lock, the first locking part is a spiral surface which is arranged on the side peripheral wall of the locking piece, faces to the stopping part and is gradually changed in height, and the stopping part is a boss structure arranged on the side wall of the lock rod.

In a further technical scheme, the first triggering part is a cam structure arranged on the side wall of the locking piece, and the cam structure is provided with a cam surface gradually far away from the central axis of the locking piece along the circumferential direction.

In a further technical scheme, the cover plate is rotatably installed on the installation frame, the second locking part and the second triggering part are boss structures arranged on the side part of the cover plate, and the clearance part is a groove structure arranged on the lock rod.

In a further technical scheme, the cover plate is provided with an upward protruding rotating handle, and the upper shell is provided with a second perforation for the rotating handle to extend out.

In a further technical scheme, the electric operating mechanism comprises a test button capable of moving up and down, a clamping groove is formed in the side face of the test button, a clamping table is arranged on the safety lock, and the clamping table is clamped into the clamping groove when the safety lock rotates to be locked; and a third perforation is arranged at the upper part of the upper shell at a position corresponding to the upper end of the test button.

The utility model has the positive effects that:

in the electric operating mechanism, after the structure is improved, a good protection effect can be achieved, the safety of the electric operating mechanism in use is ensured, when the circuit breaker is in an unlocking state in use, the circuit breaker can be normally controlled to be closed in an electric operation or manual operation mode, and when the circuit breaker is in the unlocking state, the circuit breaker cannot be controlled to be closed in an electric operation or manual operation mode; in the switch-on state of the circuit breaker, the switch-off of the circuit breaker can be controlled in an electric operation or manual operation mode.

When the circuit breaker is in a switching-off state (the push block is in a switching-off position), the electric driving assembly keeps on and can normally conduct electric operation switching-on when the safety lock is in an unlocking state, the cover plate can be freely opened and closed, and the electric driving assembly can be powered off and can conduct manual operation switching-on when the cover plate is opened; when the circuit is maintained, the circuit breaker is disconnected and the cover plate is closed, and then the safety lock is controlled to be locked, so that the electric driving assembly is powered off to close the electric operation mode, and meanwhile, the manual operation hole is closed and cannot be manually operated because the cover plate is limited at the closing position by the lock rod, namely, in the circuit breaker disconnection state, the safety lock cannot be electrically operated or manually operated when being in the locking state, thereby ensuring that a load circuit is cut off during circuit maintenance and ensuring operation safety; when the circuit breaker is in a closing state (the pushing block is in a closing position), the locking part plays a stop limiting role on the locking rod, so that the locking rod is limited to move to the first position, the safety lock can only be in an unlocking state, at the moment, the electric driving assembly keeps on to realize electric operation brake separation, and at the moment, the cover plate can be freely opened and closed, so that manual operation brake separation can be performed at the moment.

Drawings

These and/or other aspects, features and advantages of the present disclosure will become more apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is a block diagram of an electric operating mechanism in the present utility model;

FIG. 2 is an exploded view of the electric operating mechanism shown in FIG. 1;

FIG. 3 is a top view of the electric actuator of the present utility model with the upper housing removed (shown with the cover closed);

FIG. 4 is a diagram showing a mating relationship among a cover plate, a safety lock, a lock rod and a locking part (in the drawing, a push block is in a brake separating position, the cover plate is closed, the lock rod is in a first position, and the safety lock is locked);

FIG. 5 is a diagram showing another mating relationship among the cover plate, the safety lock, the lock lever and the locking part (in the diagram, the push block is in a closing position, the cover plate is in an opening position, the lock lever is in a second position, and the safety lock is in an unlocking position);

FIG. 6 is a block diagram of a security lock of the present utility model;

FIG. 7 is a block diagram of another view of the security lock of FIG. 6;

FIG. 8 is a block diagram of the lock lever of the present utility model;

FIG. 9 is a view of the lock lever of FIG. 8 from another perspective;

fig. 10 is a structural view of a cover plate in the present utility model.

The reference numerals shown in the figures are: 1-an upper shell; 11-a manual operation hole; 12-first perforation; 13-a second perforation; 14-test button; 141-a clamping groove; 15-a third perforation; 16-a guide rod; 17-a manual handle; 18-a handle positioning cavity; 2-mounting frames; 21-a first microswitch; 22-a second microswitch; 3-pushing blocks; 31-a locking part; 4-an electric drive assembly; 5-a manual drive assembly; 6-a transmission piece; 7-a circuit board; 8-cover plate; 81-a second locking portion; 82-a second trigger; 83-turning handle; 9-a safety lock; 91-a first locking portion; 92-a first trigger; 93-a keyhole; 94-locking the column; 95-locking piece; 96-clamping table; 97-bump; 10-a lock rod; 101-a resisting part; 102-a clearance part; 103-a stop; 104-springs.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model.

Fig. 1 to 10 show an electric operating mechanism for use in a molded case circuit breaker.

The electric operating mechanism of the embodiment comprises an upper shell 1, a mounting frame 2 arranged in the upper shell 1, a pushing block 3 arranged on the mounting frame 2, an electric driving assembly 4 and a manual driving assembly 5; the electric driving assembly 4 and the manual driving assembly 5 are in transmission connection with the transmission piece 6, and drive the push block 3 to reciprocate between the opening position and the closing position when the transmission piece 6 rotates; the upper shell 1 is provided with a manual operation hole 11; the electric operating mechanism is arranged on the upper part of the molded case circuit breaker, the push block 3 is connected with the circuit breaker handle, the electric driving component 4 drives the transmission piece 6 to rotate during electric operation, and the transmission piece 6 drives the push block 3 to move during rotation, so as to drive the circuit breaker handle to switch on or off; during manual operation, a manual operation handle passes through the manual operation hole 11 to be connected with the manual driving assembly 5, the transmission piece 6 is driven to rotate by rotating the manual operation handle, and the push block 3 is driven to move by the transmission piece 6, so that the breaker handle is driven to be switched on and off; the structure of the electric drive assembly (typically including the motor, gear set, circuit board 7, etc.) and the manual drive assembly 5 is prior art and will not be described in detail herein.

Specifically, a cover plate 8, a safety lock 9, a lock rod 10, a first micro switch 21 and a second micro switch 22 are installed on the installation frame 2, a locking part 31 is installed on the push block 3, the cover plate 8 is used for closing and opening the manual operation hole 11, the cover plate 8 closes the manual operation hole 11 when being closed, so that the manual operation handle cannot be inserted into the manual operation hole 11, the cover plate 8 fully opens the manual operation hole 11 when being opened, so that the manual operation handle can be inserted into the manual operation hole 11, the lock rod 10 can move up and down between a first position and a second position relative to the installation frame 2, the safety lock 9 locks and unlocks through rotation, the safety lock 9 triggers the first micro switch 21 to disconnect the electric driving assembly 4 when in a locking state, and triggers the second micro switch 22 to disconnect the electric driving assembly 4 when in an opening position, that is triggered by either the first micro switch 21 or the second micro switch 22, so that the electric driving assembly 4 cannot be disconnected when the electric driving assembly 4 is not powered off when the first micro switch 21 and the second micro switch 22 are triggered;

in the embodiment shown in fig. 1 to 10, the first position is set as a lower limit position, the second position is set as an upper limit position, and the lock lever 10 is moved upward to reach an upper limit position by being moved downward to reach the lower limit position.

Further, the cover plate 8, the safety lock 9, the lock lever 10 and the locking portion 31 are in the following fit relationship:

referring to fig. 4, when the push block 3 is in the opening position (i.e. the breaker is correspondingly in the opening state): the safety lock 9 rotates and locks to drive the lock rod 10 to move to the first position to limit the cover plate 8 to the closed position, at the moment, the electric driving assembly 4 cannot be electrically operated because the safety lock 9 triggers the first micro switch 21 to cut off the power, and meanwhile, the manual operation hole 11 is closed and cannot be manually operated because the lock rod 10 limits the cover plate 8 to the closed position, that is, in the state that the circuit breaker is separated from the gate, the safety lock 9 cannot be electrically operated or manually operated when being in the locked state; and the displacement of the locking part 31 and the locking rod 10 at the moment does not influence the movement of the locking rod 10 to the first position;

when the push block 3 is at the opening position, the lock rod 10 moves to the second position under the action of the spring 104 when the safety lock 9 rotates and is unlocked, the cover plate 8 is released from being limited to be opened and closed, the first micro switch 21 is reset when the safety lock 9 is in the unlocking state, at the moment, the electric driving assembly 4 is electrified, and the electric operation function is recovered; and the limitation of the lock rod 10 to the cover plate 8 is released, the cover plate 8 can be freely opened and closed, at the moment, after the cover plate 8 is opened, the second micro switch 22 can be triggered to cut off the power of the electric driving assembly 4 so as to close the electric operation function, and the manual operation can be performed by inserting the manual operation handle through the manual operation hole 11, so that the safety lock 9 is prevented from being locked under the condition that the cover plate 8 is opened, and the lock rod 10 is locked when the cover plate 8 is opened so as to keep the safety lock 9 in an unlocking state, so that the safety lock 9 cannot be rotated to be locked.

Referring to fig. 5, when the push block 3 is in a closing position (i.e. the circuit breaker is correspondingly in a closing state): when the safety lock 9 is in the unlocking state, the lock rod 10 is in the second position under the action of the spring 104, the locking part 31 blocks the lock rod 10 to prevent the lock rod 10 from moving to the first position, at this time, the safety lock 9 is limited by the lock rod 10 and cannot be locked in a rotating way, and meanwhile, the lock rod 10 releases the limitation on the cover plate 8 to enable the cover plate 8 to be opened and closed, under the condition, the electric driving assembly 4 resumes the energization to enable the electric operation to open and close, and the cover plate 8 can be opened and closed freely, so that the opening can be manually operated, and the circuit breaker can be opened manually or electrically at any time in the closing state, so that the electric safety is ensured.

By adopting the scheme in the embodiment, when the circuit breaker is in a switching-off state (the push block 3 is in a switching-off position) and the safety lock 9 is in an unlocking state and the cover plate 8 is closed, the first micro switch 21 and the second micro switch 22 are not triggered, the electric driving assembly 4 keeps on and can be normally electrically operated to switch on, the cover plate 8 can be freely opened and closed, and when the cover plate 8 is opened, the electric driving assembly 4 can be powered off and can be manually operated to switch on by triggering the second micro switch 22; when the circuit breaker is required to be maintained, the cover plate 8 is closed after the circuit breaker is opened, then the safety lock 9 is controlled to be locked, the first micro switch 21 is triggered at the moment, so that the electric driving assembly 4 is powered off to close the electric operation mode, meanwhile, the cover plate 8 is limited at the closing position through the lock rod 10, so that the manual operation hole 11 is closed, and cannot be manually operated, namely, in the state that the circuit breaker is opened, the safety lock 9 cannot be electrically operated or manually operated when being in the locking state, so that the load circuit is effectively cut off during the circuit maintenance, and the operation safety is ensured; when the circuit breaker is in a closing state (the push block 3 is in a closing position), the locking part 31 plays a role in stopping and limiting the lock rod 10, so that the lock rod 10 is prevented from moving to the first position, the safety lock 9 can only be in an unlocking state, the first micro switch 21 can not be triggered at this time, the electric driving assembly 4 can be kept on to realize electric operation brake separation, and the cover plate 8 can be freely opened and closed at this time, so that manual operation brake separation can be carried out when the cover plate 8 is opened.

In order to ensure the integrity and compactness of the structure of the electric operating mechanism, the electric operating mechanism is suitable for assembling the push block 3, the electric driving assembly 4, the manual driving assembly 5, the transmission piece 6 and other parts on the mounting frame 2, the mounting frame 2 adopts a multi-layer structure assembled by a plurality of mounting parts, the parts can be adaptively mounted in the space between two adjacent layers, two guide rods 16 are fixed in the space between the bottommost layer and the secondary layer, two guide rod trepanning holes are arranged on the push block 2 and are respectively sleeved with the two guide rods 16 and can axially slide along the guide rods 16, a handle trepanning hole is arranged at the bottom of the push block 2 and is sleeved with a breaker handle through the handle trepanning hole, and the push block 2 drives the breaker handle to act when axially moving along the guide rods 16.

Specifically, as shown in fig. 2 to 5, the safety lock 9 is provided with a first locking portion 91 and a first triggering portion 92; the cover plate 8 is provided with a second locking part 81 and a second triggering part 82; the lock rod 10 is provided with a resisting part 101, a clearance part 102 and a stop part 103, the clearance part 102 and the resisting part 101 are arranged in a staggered manner in the vertical direction, a limiting hole for installing the lock rod 10 is arranged on the mounting frame 2, the lock rod 10 is inserted into the limiting hole to move up and down, the spring 104 is preferably a spiral pressure spring, and can be sleeved on the lock rod 10 during installation, so that two ends of the spring are respectively connected with the mounting frame 2 and the lock rod 10, and elasticity is provided for the lock rod 10 through the spring 104.

Specifically, when the push block 3 is at the opening position: in the process of rotating and locking the safety lock 9, the first locking part 91 and the stop part 103 are in limit fit to drive the lock rod 10 to move to the first position, at this time, the blocking part 101 and the second locking part 81 are in blocking fit to limit the cover plate 8 to the closed position, so that the cover plate 8 cannot be opened, and manual operation and closing cannot be performed, and meanwhile, the first trigger part 92 triggers the first micro switch 21 to control the electric driving assembly 4 to be powered off, and electric operation and closing cannot be performed; the first triggering part 92 does not trigger the first micro switch 21 when the safety lock 9 rotates to an unlocking state, meanwhile, the first locking part 91 releases the limit on the stop part 103, the lock rod 10 moves to a second position under the action of the spring 104, at the moment, the resisting part 101 releases the limit on the second locking part 81, meanwhile, the empty part 102 is positioned on the moving path of the second locking part 81 and can allow the second locking part 81 to extend into so as to enable the cover plate 8 to be opened and closed, the second locking part 81 extends into the empty part 102 when the cover plate 8 is opened and prevents the lock rod 10 from moving to the first position, at the moment, the stop part 103 also resists the first locking part 91 so that the safety lock 9 cannot be locked, at the same time, the second triggering part 82 triggers the second micro switch 22, and the second triggering part 82 does not trigger the second micro switch 22 when the cover plate 8 is closed;

when the push block 3 is in a closing position: when the safety lock 9 is in the unlocking state, the lock rod 10 is in the second position under the action of the spring 104, the locking part 31 is located on the moving path of the lock rod 10 so as to stop the lock rod 10 to prevent the lock rod 10 from moving to the first position, at this time, the stop part 103 resists the first locking part 91 so that the safety lock 9 cannot be locked, the clearance part 102 is located on the moving path of the second locking part 81 and can be used for the second locking part 81 to extend in, so that the cover plate 8 can be opened and closed, and likewise, the second triggering part 82 triggers the second micro switch 22 when the cover plate 8 is opened.

In a further embodiment, as shown in fig. 1 and 2, a handle positioning cavity 18 is provided at the side of the upper case 1, and the manual handle 17 is inserted into the handle positioning cavity 18 after being used up, so as to facilitate the use of the manual handle 17.

Further, as shown in fig. 4 to 7, the safety lock 9 includes a lock housing, a rotatable lock column 94 and a locking member 95 connected to the lower end of the lock column 94, wherein the upper end of the lock column 94 is provided with a key hole 93 for inserting a key, and when the lock column 94 is driven to rotate after the key is inserted into the key hole 93, the locking member 95 is driven to rotate to realize the switching of locking and unlocking; the upper shell 1 is provided with a first through hole 12 corresponding to the upper end of the safety lock 9, the first locking part 91 is a spiral surface which is arranged on the side peripheral wall of the locking piece 95, faces to the stop part 103 and has gradually changed height, the stop part 103 is a boss structure arranged on the side wall of the lock rod 10, the stop part 103 is abutted against the first locking part 91 under the action of the elasticity of the spring 104, and the first locking part 91 adopts a spiral surface structure, so that the relative movement between the first locking part and the stop part 103 is smooth when the safety lock 9 rotates and switches; when the safety lock 9 is in a locking state, the spiral surface abuts against the stop part 103 so that the lock rod 10 is limited at a first position and cannot move to a second position, when the safety lock 9 is rotated from locking to unlocking, the stop part 103 abuts against the spiral surface under the action of the elastic force of the spring 104 on the lock rod 10 moving to the second position, along with rotation of the safety lock 9, the contact part between the spiral surface and the stop part 103 gradually changes along the spiral surface, when the safety lock 9 is rotated by a certain angle to an unlocking state, the lock rod 10 moves to the second position, when the cover plate 8 is in an opening state, the second locking part 81 on the cover plate 8 stretches into the clearance part 102 so as to limit the lock rod 10 to move to the first position, and then the stop part 103 abuts against the spiral surface so as to limit the safety lock 9, thereby playing a role of preventing misoperation of the safety lock.

The locking piece 95 shown in fig. 7 is provided with a protruding projection 97 on its side peripheral surface, and the above-mentioned helicoid is formed on the projection 97.

Referring to fig. 6, the first triggering portion 92 is a cam structure disposed on a sidewall of the locking member 95, and the cam structure has a cam surface gradually away from a central axis of the locking member 95 along a circumferential direction, and generates linear pressure with a button of the first micro switch 21 through the cam surface during rotation of the locking member 95, and triggers a pressing rod of the first micro switch 21 on an end of the cam surface away from the central axis of the locking member 95 to switch the state of the first micro switch 21.

In this embodiment, the cover plate 8 is rotatably mounted on the mounting frame 2, and the cover plate 8 may be specifically configured as follows: the cover plate 8 is provided with a shaft hole, the mounting frame 2 is provided with a mounting shaft, the cover plate 8 is rotatably mounted on the mounting frame 2 through the shaft hole and the mounting shaft in a sleeving manner, the cover plate 8 is opened and closed in a rotating manner around the mounting shaft by rotating the cover plate 8, in order to facilitate the rotation of the cover plate 8, the cover plate 8 is provided with an upward protruding rotating handle 83, the upper shell 1 is provided with a second perforation 13 for the extending of the rotating handle 83, and when the cover plate 8 is rotated, the rotating handle 83 is pinched by a hand to rotate so as to drive the cover plate 8 to rotate; as a variant embodiment, the cover plate 8 is not provided with a rotating handle 83, and a slotted hole structure is correspondingly arranged, so that a tool is inserted into the slotted hole structure to rotate the cover plate 8; the second locking portion 81 and the second triggering portion 82 are boss structures arranged on the side portion of the cover plate 8.

Referring to fig. 5, the space avoiding portion 102 is a groove structure formed on the lock rod 10, when the cover plate 8 is in an open state, the second locking portion 81 on the cover plate 8 extends into the space avoiding portion 102 of the groove structure, when the inner wall of the groove structure abuts against the second locking portion 81, the movement of the ejector rod 10 to the first position can be prevented, the groove structure has a stop surface facing the second locking portion 81, and when the cover plate 8 is opened, the second locking portion 81 is stopped by the stop surface to prevent the cover plate 8 from rotating too much. The abutment 101 is an abutment surface, which is preferably provided to face the plane of the second locking portion 81.

In a further embodiment based on the above embodiment, the electric operating mechanism further includes a test button 14 capable of moving up and down, a clamping groove 141 is provided on a side surface of the test button 14, the structure of the test button 14 is shown in fig. 2, a clamping table 96 is provided on the safety lock 9, and the clamping table 96 is clamped into the clamping groove 141 when the safety lock 9 rotates to be locked; the upper part of the upper case 1 is provided with a third through hole 15 at a position corresponding to the upper end of the test button 14, and the test button 14 can be restricted from moving up and down after the clamping table 96 is clamped into the clamping groove 141, in which case the test button 14 cannot be pressed.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. 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 utility model remain within the scope of the utility model.

Claims (7)

1. An electric operating mechanism comprises an upper shell (1), a mounting frame (2) arranged in the upper shell (1), a pushing block (3) arranged on the mounting frame (2), an electric driving assembly (4) and a manual driving assembly (5); the electric driving assembly (4) and the manual driving assembly (5) are in transmission connection with the transmission piece (6), and drive the pushing block (3) to reciprocate between the opening position and the closing position when the transmission piece (6) rotates; a manual operation hole (11) is formed in the upper shell (1);

the method is characterized in that: the novel electric power transmission device comprises a mounting frame (2), wherein a cover plate (8), a safety lock (9), a lock rod (10), a first micro-switch (21) and a second micro-switch (22) are arranged on the mounting frame (2), a locking part (31) is arranged on a push block (3), the cover plate (8) is used for closing and opening a manual operation hole (11), the lock rod (10) can move up and down between a first position and a second position, the safety lock (9) is used for locking and unlocking switching through rotation, the safety lock (9) triggers the first micro-switch (21) to enable an electric driving assembly (4) to be powered off when in a locking state, and triggers the second micro-switch (22) to enable the electric driving assembly (4) to be powered off when in an opening position;

the cover plate (8), the safety lock (9), the lock rod (10) and the locking part (31) are matched as follows:

when the push block (3) is at the opening position: the safety lock (9) drives the lock rod (10) to a first position to limit the cover plate (8) at a closed position when being rotationally locked; the lock rod (10) moves to a second position under the action of the spring (104) when the safety lock (9) rotates to an unlocking state, the cover plate (8) is released from being limited to be opened and closed, and the lock rod (10) is locked when the cover plate (8) is opened, so that the safety lock (9) is kept in the unlocking state;

when the push block (3) is in a closing position: the safety lock (9) is in an unlocking state, the lock rod (10) is in a second position under the action of the spring (104), the lock part (31) blocks the lock rod (10) to prevent the lock rod (10) from moving in a first position, at the moment, the safety lock (9) is limited by the lock rod (10) and cannot be locked, and meanwhile, the lock rod (10) releases the limit on the cover plate (8) to enable the cover plate (8) to be opened and closed.

2. The electric operating mechanism of claim 1, wherein:

the safety lock (9) is provided with a first locking part (91) and a first triggering part (92);

the cover plate (8) is provided with a second locking part (81) and a second triggering part (82);

the lock rod (10) is provided with a resisting part (101), a clearance part (102) and a stop part (103), and the clearance part (102) and the resisting part (101) are arranged in a staggered manner in the up-down direction;

when the push block (3) is at the opening position: when the safety lock (9) is rotationally locked, the first locking part (91) is in limit fit with the stop part (103) to drive the lock rod (10) to move to a first position, at the moment, the blocking part (101) is in blocking fit with the second locking part (81) to limit the cover plate (8) to a closed position, and meanwhile, the first trigger part (92) triggers the first micro switch (21); the first locking part (91) releases the limit on the stop part (103) when the safety lock (9) rotates to an unlocking state, the lock rod (10) moves to a second position under the action of a spring (104), the limit on the second locking part (81) is released by the resisting part (101), meanwhile, the clearance part (102) is positioned on the moving path of the second locking part (81) and can enable the second locking part (81) to extend in, so that the cover plate (8) can be opened and closed, the second locking part (81) extends into the clearance part (102) and prevents the lock rod (10) from moving to the first position when the cover plate (8) is opened, the stop part (103) resists the first locking part (91) to enable the safety lock (9) to be unlocked, and meanwhile, the second micro switch (22) is triggered by the second triggering part (82);

when the push block (3) is in a closing position: the safety lock (9) is in an unlocking state, the lock rod (10) is in a second position under the action of a spring (104), the locking part (31) is positioned on the moving path of the lock rod (10) to stop the lock rod (10) to prevent the lock rod (10) from moving to a first position, at the moment, the stop part (103) is used for stopping the first locking part (91) to ensure that the safety lock (9) cannot be locked, and the clearance part (102) is positioned on the moving path of the second locking part (81) and can be used for the second locking part (81) to stretch in, so that the cover plate (8) can be opened and closed.

3. The electric operating mechanism according to claim 2, characterized in that: the safety lock (9) comprises a rotatable lock column (94) and a locking piece (95) connected with the lower end of the lock column (94), a key hole (93) for a key to be inserted is formed in the upper end of the lock column (94), a first through hole (12) is formed in the upper shell (1) corresponding to the upper end of the safety lock (9), a first locking portion (91) is a spiral surface which is arranged on the side peripheral wall of the locking piece (95) and faces to a stopping portion (103) and is gradually changed in height, and the stopping portion (103) is a boss structure arranged on the side wall of the lock rod (10).

4. An electrically operated mechanism according to claim 3, wherein: the first triggering part (92) is a cam structure arranged on the side wall of the locking piece (95), and the cam structure is provided with a cam surface gradually far away from the central axis of the locking piece (95) along the circumferential direction.

5. The electric operating mechanism according to claim 2, characterized in that: the cover plate (8) is rotatably installed on the installation frame (2), the second locking part (81) and the second triggering part (82) are boss structures arranged on the side part of the cover plate (8), and the clearance part (102) is a groove structure arranged on the lock rod (10).

6. The electric operating mechanism of claim 5, wherein: the cover plate (8) is provided with a rotating handle (83) protruding upwards, and the upper shell (1) is provided with a second perforation (13) for the rotating handle (83) to extend out.

7. The electric operating mechanism of claim 1, wherein: the electric operating mechanism comprises a test button (14) capable of moving up and down, a clamping groove (141) is formed in the side face of the test button (14), a clamping table (96) is arranged on the safety lock (9), and the clamping table (96) is clamped into the clamping groove (141) when the safety lock (9) rotates to be locked; the upper part of the upper shell (1) is provided with a third perforation (15) at a position corresponding to the upper end of the test button (14).