阅读说明：本技术 一种即插即用开关操作机构 (Plug-and-play switch operating mechanism ) 是由 叶建川 杨孝洪 于 2021-05-31 设计创作，主要内容包括：本发明属于低压配电技术领域,具体涉及一种即插即用开关操作机构。其技术方案为：一种即插即用开关操作机构,包括固定板,固定板上设置有若干限位挡板,固定板与限位挡板之间设置有安装机构,开关功能单元连接于安装机构上,固定板上连接有用于推进开关功能单元的推进机构；所述开关功能单元上滑动连接有分合指示机构,分合指示机构移动到其中一个极限位置时阻挡开关功能单元的拨动手柄的接通位置,分合指示机构移动到另一个极限位置时阻挡推进机构推进后的位置。本发明提供了一种可对单个开关功能单元进行插拔操作且保证操作时开关功能单元处于断电状态的即插即用开关操作机构。(The invention belongs to the technical field of low-voltage power distribution, and particularly relates to a plug-and-play switch operating mechanism. The technical scheme is as follows: a plug-and-play switch operating mechanism comprises a fixing plate, wherein a plurality of limit baffles are arranged on the fixing plate, an installation mechanism is arranged between the fixing plate and the limit baffles, a switch function unit is connected onto the installation mechanism, and a propelling mechanism for propelling the switch function unit is connected onto the fixing plate; the switch function unit is connected with a switch-on and switch-off indicating mechanism in a sliding mode, the switch-on and switch-off indicating mechanism blocks the switch-on position of a toggle handle of the switch function unit when moving to one limit position, and the switch-on and switch-off indicating mechanism blocks the position of the pushing mechanism after pushing when moving to the other limit position. The invention provides a plug-and-play switch operating mechanism which can carry out plug-in and pull-out operation on a single switch functional unit and ensure that the switch functional unit is in a power-off state during operation.)

1. A plug-and-play switch operating mechanism is characterized by comprising a fixing plate (1), wherein a plurality of limit baffles (11) are arranged on the fixing plate (1), an installation mechanism (2) is arranged between the fixing plate (1) and the limit baffles (11), a switch functional unit (3) is connected onto the installation mechanism (2), and a propelling mechanism (4) for propelling the switch functional unit (3) is connected onto the fixing plate (1); the switch function unit (3) is connected with a switch-on and switch-off indicating mechanism (5) in a sliding mode, the switch-on and switch-off indicating mechanism (5) blocks the switch-on position of a toggle handle (321) of the switch function unit (3) when moving to one limit position, and the switch-on and switch-off indicating mechanism (5) blocks the position of a pushing mechanism (4) after being pushed when moving to the other limit position.

2. Plug and play switch operating mechanism according to claim 1, characterized in that the pushing mechanism (4) comprises an arc-shaped fork (41), the arc-shaped fork (41) being hinged to the fixed plate (1); the installation mechanism (2) comprises a switch movable mounting plate (21), the switch functional unit (3) is connected to the switch movable mounting plate (21), a propelling shaft (22) is connected to the installation movable mounting plate, and the propelling shaft (22) is sleeved in an arc-shaped groove of the arc-shaped shifting fork (41).

3. Plug and play switch operating mechanism according to claim 2, characterized in that a turning plate (42) is fixed to the arc fork (41), and a push rod (43) is connected to the turning plate (42).

4. The plug-and-play switch operating mechanism according to claim 2, wherein said switch movable mounting plate (21) is fixed with a plurality of limiting shafts (23), and the limiting shafts (23) are located on one side of the limiting baffle (11) close to the fixing plate (1).

5. The plug-and-play switch operating mechanism according to claim 1, wherein a notch is provided on the fixing plate (1), and a limit interlocking mechanism (6) is installed at the notch of the fixing plate (1); spacing interlocking gear (6) are fixed in on fixed plate (1) including fixed cover (61), and fixed cover (61) endotheca is equipped with and is used for carrying out spacing activity limiting plate (62) to installation mechanism (2) when removing breach department.

6. The plug-and-play switch operating mechanism according to claim 5, wherein a guide bar (621) is provided in said movable restriction plate (62), a spring (63) is sleeved in said guide bar (621), and the other end of said spring (63) is connected to one end of said fixed sleeve (61) in the pulling direction of said switch function unit (3).

7. A plug-and-play switch-operating mechanism, according to claim 6, characterized in that the upper side of the end of said movable stopper plate (62) remote from said spring (63) is beveled.

8. The plug-and-play switch operating mechanism according to claim 1, wherein the on-off indicating mechanism (5) comprises an on-off indicating cover plate (51) and an on-off indicating support (52), the on-off indicating support (52) is fixed on the switch functional unit (3), a sliding groove (521) is arranged on the on-off indicating support (52), a sliding head (511) is arranged at the bottom of the on-off indicating cover plate (51), and the sliding head (511) is sleeved in the sliding groove (521).

9. The plug-and-play switch operating mechanism according to claim 8, wherein the middle of the sliding head (511) is provided with a longitudinal slot (512), the two ends of the sliding slot (521) are communicated with a circular hole (522), the diameter of the circular hole (522) is larger than the width of the sliding slot (521), and the diameter of the sliding head (511) is larger than the width of the sliding slot (521).

10. The plug and play switch operating mechanism according to any one of claims 1 to 9, wherein the switch function unit (3) is connected with a propelling mechanism shield (7), and one end of the propelling mechanism (4) extending out of the fixing plate (1) is sleeved in the propelling mechanism shield (7).

Technical Field

The invention belongs to the technical field of low-voltage power distribution, and particularly relates to a plug-and-play switch operating mechanism.

Background

The switch function unit comprises a circuit breaker and a plug-in box which are connected with each other, when the switch function unit works, the plug-in box is plugged with the bus chamber valve, and the circuit breaker can be switched on and off. When the switch function unit needs to be overhauled, the switch function unit needs to be powered off, and then the switch function unit is taken out, namely, the toggle handle of the circuit breaker needs to be toggled to a disconnection position.

In the prior art, a drawer cabinet is adopted to install a switch function unit, and when a certain switch function unit needs to be overhauled, the drawer cabinet is integrally pulled out. However, when the drawer cabinet is used to install the switch function unit, the switch function unit which needs to be maintained cannot be taken out, and the operation is inconvenient. Moreover, the drawer cabinet has high cost and complex structure.

If a switch function unit is independently plugged, the toggle handle of the circuit breaker is in a disconnection state when plugging can not be guaranteed. If an operator forgets to toggle the toggle handle to a disconnection state when plugging the switch functional unit relative to the bus chamber valve, a large safety risk is caused.

Disclosure of Invention

In order to solve the above problems in the prior art, an object of the present invention is to provide a plug-and-play switch operating mechanism capable of performing a plugging operation on a single switch functional unit and ensuring that the switch functional unit is in a power-off state during the operation.

The technical scheme adopted by the invention is as follows:

a plug-and-play switch operating mechanism comprises a fixing plate, wherein a plurality of limit baffles are arranged on the fixing plate, an installation mechanism is arranged between the fixing plate and the limit baffles, a switch function unit is connected onto the installation mechanism, and a propelling mechanism for propelling the switch function unit is connected onto the fixing plate; the switch function unit is connected with a switch-on and switch-off indicating mechanism in a sliding mode, the switch-on and switch-off indicating mechanism blocks the switch-on position of a toggle handle of the switch function unit when moving to one limit position, and the switch-on and switch-off indicating mechanism blocks the position of the pushing mechanism after pushing when moving to the other limit position.

When the switch function unit is required to be plugged with the bus chamber valve, the pushing mechanism is operated to push the switch function unit forwards, and the limit baffle can accurately limit the installation mechanism and the switch function unit. Similarly, when the switch function unit needs to be overhauled, the switch function unit can be pulled out only by reversely operating the propelling mechanism. The on-off indicating mechanism blocks the on-position of a toggle handle of the switch functional unit when moving to one of the limit positions, and the on-off indicating mechanism blocks the position of the pushing mechanism after pushing when moving to the other limit position, namely, the pushing mechanism can be operated only under the condition that the switch function is powered off, and the breaker of the switch functional unit can be operated only when the pushing mechanism fails. The invention can avoid the hot plugging of the switch functional unit and ensure the safety.

As the preferred scheme of the invention, the propelling mechanism comprises an arc-shaped shifting fork, and the arc-shaped shifting fork is hinged on the fixing plate; the installation mechanism comprises a switch movable installation plate, the switch functional unit is connected to the switch movable installation plate, a propelling shaft is connected to the installation movable installation plate, and the propelling shaft is sleeved in an arc-shaped groove of the arc-shaped shifting fork.

When the arc-shaped shifting fork is rotated, the arc-shaped shifting fork can push the propelling shaft to move. Because the limit baffle can limit the installation mechanism, the installation mechanism drives the switch function unit to move linearly, and the plug box of the switch function unit can be accurately plugged with the bus chamber valve. The propulsion shaft is not fixedly connected with the arc-shaped shifting fork, so that when the switch functional unit is pulled out after the plug box is pulled out of the bus chamber valve, the propulsion shaft can be directly pulled out of the arc-shaped shifting fork, and the switch functional unit and the installation mechanism can be conveniently and quickly taken out of the whole body.

As a preferable scheme of the invention, a rotating plate is fixed on the arc-shaped shifting fork, and a pushing rod is connected on the rotating plate. When the pushing rod is pushed or pulled, the pushing rod drives the rotating plate to rotate, the rotating plate drives the arc-shaped shifting fork to rotate, and then the arc-shaped shifting fork can accurately push the pushing shaft to move.

As a preferable scheme of the invention, the switch movable mounting plate is fixed with a plurality of limiting shafts, and the limiting shafts are positioned on one side of the limiting baffle close to the fixing plate. The limiting shaft is located between the limiting baffle and the fixing plate, when the pushing mechanism pushes the mounting mechanism and the switch functional unit to move, the limiting baffle limits the limiting shaft, the mounting mechanism can move linearly all the time, and the plug box and the bus chamber valve can be accurately plugged.

As a preferred scheme of the invention, a gap is arranged on the fixing plate, and a limit interlocking mechanism is arranged at the gap of the fixing plate; the limiting interlocking mechanism comprises a fixing sleeve, the fixing sleeve is fixed on the fixing plate, and a movable limiting plate used for limiting the installation mechanism when the fixing sleeve moves to the notch is sleeved in the fixing sleeve. When the installation mechanism moves to the gap, the movable limiting plate of the limiting interlocking mechanism can limit the installation mechanism, so that the situation that the installation mechanism cannot be limited when moving to the gap section is avoided, and the switch function unit is guaranteed to move along a straight line all the time. When the switch functional unit needs to be taken out, the movable limiting plate is pulled, the movable limiting plate moves relative to the fixed sleeve, one section of the notch leaks, and the limiting part of the mounting mechanism can be separated from the notch, so that the switch functional unit can be taken out conveniently and quickly.

As a preferred scheme of the present invention, a guide rod is disposed in the movable limiting plate, a spring is sleeved in the guide rod, and the other end of the spring is connected to one end of the fixed sleeve located in the pulling direction of the switch function unit. When the movable limiting plate is pulled, the guide rod can limit the position of the spring, and the spring is prevented from being extruded when the movable limiting plate is pulled. After the switch functional unit and the mounting mechanism are mounted to form the whole, the movable limiting plate is released and resets under the thrust of the spring, so that the movable limiting plate can reliably limit the mounting mechanism. Under the effect of spring, when propelling switch functional unit and installation mechanism and forming the whole, the activity limiting plate can not backward move, security when guaranteeing the plug box.

As a preferable scheme of the present invention, an upper side of one end of the movable limiting plate, which is far away from the spring, is an inclined surface. The upper side of the movable limiting plate is an inclined plane, and when the movable limiting plate is released, the movable limiting plate can penetrate through the hole of the fixed sleeve under the action of the spring, so that the situation that the movable limiting plate and the fixed sleeve are clamped is avoided.

As a preferable mode of the present invention, the opening/closing indication mechanism includes an opening/closing indication cover plate and an opening/closing indication support, the opening/closing indication support is fixed to the switch function unit, a sliding groove is formed in the opening/closing indication support, a sliding head is arranged at the bottom of the opening/closing indication cover plate, and the sliding head is sleeved in the sliding groove. The sliding head of the opening and closing indicating cover plate can accurately slide in the sliding groove, and then the opening and closing indicating cover plate can reliably move to a position for blocking the switching-on position of the toggle handle or the pushing position of the pushing mechanism.

As a preferable scheme of the invention, the middle part of the sliding head is provided with a longitudinal groove, the two ends of the sliding groove are communicated with round holes, the diameter of the round hole is larger than the width of the sliding groove, and the diameter of the sliding head is larger than the width of the sliding groove. Because the diameter of the round hole is greater than the width of the sliding groove and the diameter of the sliding head is greater than the width of the sliding groove, when the split indication cover plate moves to any limit position, the sliding head opens, the sliding head can be clamped in the round hole, the sliding head is prevented from moving to the sliding groove, and the split indication cover plate is guaranteed to be stable in position.

As a preferable scheme of the present invention, the switch function unit is connected to a propelling mechanism shield, and one end of the propelling mechanism extending out of the fixing plate is sleeved in the propelling mechanism shield. The propelling mechanism shield can protect the propelling rod of the propelling mechanism, and misoperation of the propelling rod by workers is avoided.

The invention has the beneficial effects that:

the pushing mechanism can accurately push the switch functional unit to the position of inserting the bus chamber valve and can also accurately pull out the switch functional unit. The on-off indicating cover plate blocks the on-position of a toggle handle of the switch functional unit when moving to one of the limit positions, and the on-off indicating cover plate blocks the position of the pushing mechanism after pushing when moving to the other limit position, namely, the pushing mechanism can be operated only under the condition of switch function power-off, and the circuit breaker of the switch functional unit can be operated only when the pushing mechanism fails. The invention can avoid the hot plugging of the switch functional unit and ensure the safety.

Drawings

FIG. 1 is an assembly view of the present invention with a switch function unit;

FIG. 2 is an exploded view of the present invention and switch function unit;

FIG. 3 is a schematic structural view of a movable mounting plate of the switch;

FIG. 4 is a schematic view of the structure of the fixing plate;

FIG. 5 is a schematic diagram of the structure of the switch functional unit;

FIG. 6 is a front view of the clutch indicating cover plate and the clutch indicating bracket;

fig. 7 is a perspective view of the opening and closing indicating cover plate and the opening and closing indicating bracket;

FIG. 8 is an enlarged view of a portion of FIG. 7 at A;

FIG. 9 is an assembly view of the pushing mechanism and the stationary plate;

FIG. 10 is an assembly view of the propulsion mechanism and the propulsion shaft;

FIG. 11 is a schematic view of the fixing plate and the limit lock mechanism;

FIG. 12 is a schematic structural view of a limit lock mechanism;

FIG. 13 is a partial block diagram of the present invention;

fig. 14 is a schematic view of the structure of the propulsion mechanism shield.

In the figure, 1-fixed plate; 2-an installation mechanism; 3-a switching functional unit; 4-a propulsion mechanism; 5-a separation and combination indicating mechanism; 6-limiting interlocking mechanism; 7-propulsion mechanism shield; 11-a limit baffle; 21-a switch movable mounting plate; 22-a propulsion shaft; 23-a limiting shaft; 31-a plug box; 32-a circuit breaker; 41-arc shifting fork; 42-a rotating plate; 43-a push rod; 44-cartridge; 51-separation and combination indicating cover plate; 52-separation and combination indicating bracket; 61-fixing the sleeve; 62-movable limiting plate; 63-a spring; 321-a toggle handle; 511-a sliding head; 512-longitudinal grooves; 513-padlock holes; 521-a chute; 522-round hole; 621-guide bar.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1 to 4, the plug-and-play switch operating mechanism of the present embodiment includes a fixing plate 1, a plurality of limit baffles 11 are disposed on the fixing plate 1, an installation mechanism 2 is disposed between the fixing plate 1 and the limit baffles 11, a switch functional unit 3 is connected to the installation mechanism 2, and a propulsion mechanism 4 for propelling the switch functional unit 3 is connected to the fixing plate 1; the switch functional unit 3 is connected with a switching indicating mechanism 5 in a sliding mode, the switching indicating mechanism 5 blocks the switching position of the toggle handle 321 of the switch functional unit 3 when moving to one of the limit positions, and the switching indicating mechanism 5 blocks the position of the pushing mechanism 4 after pushing when moving to the other limit position.

As shown in fig. 5, the switching function unit 3 includes a circuit breaker 32 and a plug box 31 connected to each other, and when the pushing mechanism 4 pushes the mounting mechanism 2, the plug box 31 is plugged with the bus bar room shutter; when the pushing mechanism 4 pulls out the mounting mechanism 2, the plug box 31 is separated from the busbar compartment shutter. The circuit breaker 32 is provided with a toggle handle 321, and the toggle handle 321 is used for controlling the switch function unit 3 to be switched on or switched off.

When the switch function unit 3 needs to be plugged with the bus chamber valve, the pushing mechanism 4 is operated, the pushing mechanism 4 pushes the switch function unit 3 forwards, and the limit baffle 11 can accurately limit the installation mechanism 2 and the switch function unit 3. Similarly, when the switch function unit 3 needs to be overhauled, the switch function unit 3 can be pulled out only by reversely operating the propulsion mechanism 4. The invention can carry out pushing or pulling operation on one switch function unit 3, thereby avoiding the situation that all switch function units 3 can only be operated at the same time when the drawer cabinet is used. The invention has simple structure, convenient operation and low cost.

The on-off indicating mechanism 5 blocks the on position of the toggle handle 321 of the switch functional unit 3 when moving to one of the limit positions, and the on-off indicating mechanism 5 blocks the position of the pushing mechanism 4 after pushing when moving to the other limit position, that is, the pushing mechanism 4 can be operated only when the switch function is powered off, and the circuit breaker 32 of the switch functional unit 3 can be operated only when the pushing mechanism 4 is disabled. The invention can avoid the hot plugging of the switch functional unit 3 and ensure the safety.

Specifically, as shown in fig. 9 and 10, the pushing mechanism 4 includes an arc fork 41, and the arc fork 41 is hinged on the fixing plate 1; the installation mechanism 2 comprises a switch movable installation plate 21, the switch functional unit 3 is connected to the switch movable installation plate 21, a propelling shaft 22 is connected to the installation movable installation plate, and the propelling shaft 22 is sleeved in an arc-shaped groove of the arc-shaped shifting fork 41. A rotating plate 42 is fixed on the arc shifting fork 41, and a pushing rod 43 is connected on the rotating plate 42.

The number of the arc-shaped shifting forks 41 is two, a rotating shaft is fixedly connected between the two arc-shaped shifting forks 41, and the rotating shaft is sleeved in the round hole 522 of the fixing plate 1. Or, the rotating shaft is fixed to the fixing plate 1, and the circular holes 522 of the two arc-shaped shifting forks 41 are sleeved on the rotating shaft. Two ends of the propulsion shaft 22 are respectively sleeved in the arc-shaped grooves of the two arc-shaped shifting forks 41. The rotating plate 42 is fixed with one of the arc forks 41. The rotating plate 42 is provided with an inserting cylinder 44, and the pushing rod 43 is inserted in the inserting cylinder 44, so that the pushing rod 43 can be conveniently and quickly mounted or dismounted.

When the pushing rod 43 is pushed or pulled, the pushing rod drives the rotating plate 42 to rotate, the rotating plate 42 drives the arc-shaped shifting fork 41 to rotate, and then the arc-shaped shifting fork 41 can accurately push the pushing shaft 22 to move. Because the limit baffle 11 can limit the installation mechanism 2, the installation mechanism 2 drives the switch functional unit 3 to move linearly, and the plug box 31 of the switch functional unit 3 can be accurately plugged in and pulled out from the bus chamber valve. The propulsion shaft 22 is not fixedly connected with the arc-shaped shifting fork 41, so that when the switch functional unit 3 is pulled out after the plug box 31 is pulled out of the bus chamber valve, the propulsion shaft 22 can be directly pulled out of the arc-shaped shifting fork 41, and the switch functional unit 3 and the installation mechanism 2 can be conveniently and quickly taken out of the whole body.

As shown in fig. 1, the switching instruction mechanism 5 includes a switching instruction cover 51, and when the switching instruction cover 51 moves to one of the limit positions, the switching instruction cover 51 blocks the on position of the dial knob 321, and when the switching instruction cover 51 moves to the other limit position, the switching instruction cover 51 blocks the push lever 43 of the push mechanism 4. Therefore, after the push lever 43 pushes the attachment mechanism 2 and the switch function unit 3, the push lever 43 must be removed to allow the opening/closing indication cover 51 to be pulled. After the switching indication cover plate 51 is switched off, the toggle handle 321 of the circuit breaker 32 can be switched on and off normally.

As shown in fig. 3, the switch movable mounting plate 21 is fixed with a plurality of limiting shafts 23, and the limiting shafts 23 are located on one side of the limiting baffle 11 close to the fixing plate 1. The limiting shaft 23 is located between the limiting baffle 11 and the fixing plate 1, when the pushing mechanism 4 pushes the mounting mechanism 2 and the switch functional unit 3 to move, the limiting baffle 11 limits the limiting shaft 23, the mounting mechanism 2 can move along a straight line all the time, and the plug box 31 and the bus chamber valve are guaranteed to be accurately plugged and pulled out. Two limiting shafts 23 are arranged on two sides of the switch movable mounting plate 21, the limiting shafts 23 are blocked by the limiting baffle 11, when the mounting mechanism 2 moves, the limiting shafts 23 cling to the inner side of the limiting baffle 11 to move, and the switch functional unit 3 is guaranteed to move accurately along a straight line.

As shown in fig. 11, the fixing plate 1 is provided with a notch, and a limit interlocking mechanism 6 is installed at the notch of the fixing plate 1. As shown in fig. 12, the limit interlocking mechanism 6 includes a fixing sleeve 61, the fixing sleeve 61 is fixed on the fixing plate 1, and a movable limit plate 62 for limiting the mounting mechanism 2 when moving to the notch is sleeved in the fixing sleeve 61. When the mounting mechanism 2 moves to the notch, the movable limiting plate 62 of the limiting interlocking mechanism 6 can limit the mounting mechanism 2, so that the situation that the mounting mechanism 2 cannot be limited when moving to the notch section is avoided, and the switch function unit 3 is guaranteed to move along a straight line all the time. When the switch functional unit 3 needs to be taken out, the movable limiting plate 62 is pulled, the movable limiting plate 62 moves relative to the fixed sleeve 61, one section of the notch leaks, and the limiting part of the installation mechanism 2 can be disengaged from the notch, so that the switch functional unit 3 can be taken out conveniently and quickly.

A guide rod 621 is arranged in the movable limit plate 62, a spring 63 is sleeved in the guide rod 621, and the other end of the spring 63 is connected to one end of the fixed sleeve 61 located in the pulling-out direction of the switch function unit 3. When the movable limiting plate 62 is pulled, the guide rod 621 can limit the position of the spring 63, and the spring 63 is prevented from being extruded when the movable limiting plate 62 is pulled. After the switch function unit 3 and the mounting mechanism 2 are assembled into a whole, the movable limiting plate 62 is released, the movable limiting plate 62 is reset under the thrust of the spring 63, and the movable limiting plate 62 can reliably limit the mounting mechanism 2. Under the action of the spring 63, when the switch functional unit 3 and the mounting mechanism 2 are pushed to form a whole, the movable limiting plate 62 cannot move backwards, and the safety of plugging and unplugging the plug box 31 is ensured.

The upper side of one end of the movable limit plate 62 far away from the spring 63 is an inclined surface. The upside of activity limiting plate 62 is the inclined plane, and when release activity limiting plate 62, under the spring 63 effect, activity limiting plate 62 can pass from the downthehole of fixed cover 61, avoids activity limiting plate 62 and the dead condition of fixed cover 61 card.

As shown in fig. 6 to 8, the switching indication mechanism 5 includes a switching indication cover plate 51 and a switching indication holder 52, the switching indication holder 52 is fixed to the switch functional unit 3, a slide groove 521 is provided in the switching indication holder 52, a slider 511 is provided at the bottom of the switching indication cover plate 51, and the slider 511 is fitted in the slide groove 521. The sliding head 511 of the opening and closing indication cover plate 51 can accurately slide in the sliding groove 521, so that the opening and closing indication cover plate 51 can reliably move to a position for blocking the switching-on position of the toggle handle 321 or the pushing position of the pushing mechanism 4. As shown in fig. 6, the engagement and disengagement indicating cover 51 is provided with a locking hole 513, and when the engagement and disengagement indicating cover 51 is moved in place, the lock can be locked in the locking hole 513, so that the engagement and disengagement indicating cover 51 is prevented from moving by itself.

The middle part of the sliding head 511 is provided with a longitudinal groove 512, two ends of the sliding chute 521 are communicated with a round hole 522, the diameter of the round hole 522 is larger than the width of the sliding chute 521, and the diameter of the sliding head 511 is larger than the width of the sliding chute 521. Because the diameter of the round hole 522 is greater than the width of the sliding chute 521 and the diameter of the sliding head 511 is greater than the width of the sliding chute 521, when the opening and closing indication cover plate 51 moves to any limit position, the sliding head 511 is opened, the sliding head 511 can be clamped in the round hole 522, the sliding head 511 is prevented from moving into the sliding chute 521, and the stable position of the opening and closing indication cover plate 51 is ensured.

As shown in fig. 13 and 14, the switch function unit 3 is connected to a propulsion mechanism shield 7, and one end of the propulsion mechanism 4 extending out of the fixing plate 1 is sleeved in the propulsion mechanism shield 7. The propelling mechanism shield 7 can protect the propelling rod 43 of the propelling mechanism 4, and prevent workers from carrying out misoperation on the propelling rod 43. The propulsion mechanism shield 7 is provided with a semicircular slot, and one of the arc-shaped shifting forks 41 is positioned in the slot to avoid interference.

The working principle is as follows:

when the plug box 31 is plugged with the busbar chamber valve, the pushing rod 43 is pulled to approach the busbar chamber valve, and the pushing rod 43 drives the rotating plate 42 and the arc-shaped shifting fork 41 to rotate. Since the propulsion shaft 22 is sleeved in the arc-shaped groove of the arc-shaped shifting fork 41, the arc-shaped shifting fork 41 pushes the propulsion shaft 22 to advance. The limit shaft 23 on the switch movable mounting plate 21 clings to one side of the limit baffle plate 11 close to the fixed plate 1 to move, so that the limit baffle plate 11 can limit the limit shaft 23, and the switch functional unit 3 can move linearly. When the pushing rod 43 is snapped into place, the plug box 31 of the switch function unit 3 is accurately plugged into the busbar chamber shutter. The push lever 43 is removed, and the opening/closing indication cover 51 is pushed to release the on position of the push handle 321 of the circuit breaker 32, and the padlock is locked in the padlock hole 513 of the opening/closing indication cover 51. At this time, the opening/closing instruction cover plate 51 covers the insertion tube 44 for inserting the push lever 43, and the switch function unit 3 cannot be inserted and removed by inserting the push lever 43. At this time, the off position of the kick lever 321 of the circuit breaker 32 leaks, and the kick lever 321 of the circuit breaker 32 can be switched on and off.

When the plug box 31 is pulled out from the bus chamber shutter, the toggle handle 321 of the circuit breaker 32 is toggled to the open position, and then the opening and closing indication cover plate 51 is moved to make the plug cylinder 44 leak out, and the lock is locked in the padlock hole 513 of the opening and closing indication cover plate 51. At this time, when the switching instruction cover 51 covers the on position of the dial knob 321 of the circuit breaker 32, the dial knob 321 of the circuit breaker 32 cannot be switched. The pushing rod 43 is inserted into the inserting cylinder 44, and then the pushing rod 43 is pulled in the direction away from the bus bar room shutter, so that the pushing rod 43 drives the rotating plate 42 and the arc shifting fork 41 to rotate. Since the propulsion shaft 22 is sleeved in the arc-shaped groove of the arc-shaped shifting fork 41, the arc-shaped shifting fork 41 pulls the propulsion shaft 22, the mounting mechanism 2 and the switch function unit 3 to move. Since the limit baffle 11 limits the installation mechanism 2, the switch function unit 3 can move linearly along with the installation mechanism 2, and the plug box 31 can be accurately pulled out from the bus chamber valve. After the pushing rod 43 is pulled to the right position, the limiting shafts 23 move to the position of the gap of the fixing plate 1, and one of the limiting shafts 23 is located below the movable limiting plate 62. When the movable limit plate 62 is pulled, all the limit shafts 23 on the switch movable mounting plate 21 are not limited, and at this time, the switch function unit 3 can be directly taken out together with the mounting mechanism 2.

The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.