CN216435717U - Cable chamber door interlocking mechanism for switch cabinet and switch cabinet - Google Patents

Abstract

A cable compartment door interlocking mechanism for a switchgear cabinet and a switchgear cabinet are disclosed. Cable chamber door interlocking mechanism includes: mounting a bracket; a push block assembly configured to move upwardly relative to the mounting bracket under the urging of the upward lifting action of the cable chamber door; a follower including a pivot axis, the upward movement of the push block assembly being capable of pushing the follower into rotational movement, and the linkage being configured to selectively interact with the follower, the rotational travel of the follower being unrestricted in a first state of the main circuit of the switchgear, the rotational travel of the follower being restricted in a second state of the main circuit of the switchgear; a keeper member configured to move between a blocking position and an allowing position upon actuation by the follower, the keeper member allowing the push block assembly to move upwardly to the up-set position in the keeper member's allowing position, and the keeper member blocking the push block assembly from moving upwardly to the up-set position in the keeper member's blocking position. The switchgear cabinet includes a cable chamber door and a cable chamber door interlock.

Description

Cable chamber door interlocking mechanism for switch cabinet and switch cabinet

Technical Field

The utility model relates to a cable chamber door interlocking gear and including cable chamber door interlocking gear's cubical switchboard for cubical switchboard.

Background

The cable compartment door of a switchgear cabinet is usually of the pull-up type and comprises an interlocking mechanism. When the pull-up cable compartment door is opened, the operator first lifts the cable compartment door up to a certain height relative to the door frame, and then can remove the cable compartment door outward. In order to guarantee the personal safety of the maintenance personnel, the interlocking mechanism of the cable chamber door can limit the lifting of the cable chamber door when the switch cabinet is in certain stations, for example, a main switch or a main loop of the switch cabinet is in a closing state, so that the cable chamber door is prevented from being opened.

Existing 3-position interlocks typically rely on the location of a grounded large cam to limit the upward-lifting opening of the cable compartment door. When the grounded large cam limits the lifting of the cable compartment door open, each lift of the cable compartment door impacts the grounded large cam, which in turn may impact the internal components of the interlock mechanism. This may affect the performance of the linkage.

The 2-position interlocking mechanism does not include a large grounded cam. When such a 2-position interlock mechanism restricts the lifting open of the cable chamber door, the internal components of the interlock mechanism may be subjected to greater impact, which may affect the performance of the interlock mechanism.

Accordingly, there is a need for an improved cable chamber door interlock that overcomes at least some of the disadvantages of the prior art.

SUMMERY OF THE UTILITY MODEL

The present invention aims to overcome at least some of the above problems in the prior art.

According to an aspect of the utility model, a cable chamber door interlocking gear for cubical switchboard is provided, the cubical switchboard including have the primary circuit of first state and second state and with the link gear of the state linkage of the primary circuit of cubical switchboard, the link gear includes the link gear base, and cable chamber door interlocking gear includes:

a mounting bracket fixedly mounted relative to the linkage base;

a push block assembly configured to move upwardly relative to the mounting bracket under the urging of the upward lifting action of the cable compartment door;

a follower including a pivot axis and configured to be rotatable about the pivot axis relative to the linkage base, upward movement of the push block assembly being capable of pushing the follower into rotational movement about the pivot axis, and the linkage being configured to selectively interact with the follower so as to not limit rotational travel of the follower in a first state of the primary circuit and to limit rotational travel of the follower in a second state of the primary circuit;

a keeper member engaged with the follower and configured to move relative to the mounting bracket between a blocking position and an allowing position upon actuation of rotational movement of the follower, the keeper member allowing the pusher block assembly to move upwardly to the raised position in the blocking position, the keeper member preventing the pusher block assembly from moving upwardly to the raised position in the allowing position.

According to one or more embodiments of the present invention, the unrestricted rotational travel of the follower allows the keeper to move to the allow position, and the restricted rotational travel of the follower prevents the keeper from moving to the allow position.

According to one or more embodiments of the present invention, cable chamber door interlocking mechanism still includes main loop state stopper, main loop state stopper configure to can move under the rotary motion's of follower drive relative to the link gear base, main loop state stopper with the link gear interact, the link gear passes through main loop state stopper restricts the follower the rotatory stroke.

According to one or more embodiments of the utility model discloses a promote the position of lifting of block subassembly, major loop state stopper passes through link gear prevents the major loop is followed the first state gets into the second state.

According to one or more embodiments of the utility model, cable chamber door interlocking still includes cable chamber door hook locking mechanism, cable chamber door hook locking mechanism is including the movable hook spare that can remove between locking position and unblock position the locking position of movable hook spare, movable hook spare prevents promote the block subassembly follow lift the position and descend the unblock position of movable hook spare, movable hook spare allows promote the block subassembly follow lift the position and descend.

According to one or more embodiments of the present invention, a cable chamber door mounted to the switchgear cabinet is configured to enable the movable catch to be moved away from the locking position, while a cable chamber door removed from the switchgear cabinet allows the movable catch to enter the locking position.

According to one or more embodiments of the present invention, the keeper includes a blocking portion and a slot portion adjacent to the blocking portion, the push block assembly includes an impact portion the blocking position of the keeper, the blocking portion of the keeper with the impact portion of the push block assembly aligns the allowed position of the keeper, the slot portion of the keeper with the impact portion of the push block assembly aligns.

According to one or more embodiments of the present invention, the push block assembly is movable in a vertical direction relative to the mounting bracket, and the keeper piece is movable in a horizontal direction relative to the mounting bracket, the mounting bracket including an opening, the impact portion of the push block assembly can be in the blocking position the keeper piece abuts against the opening of the mounting bracket.

According to one or more embodiments of the present invention, the first state of the main circuit is an open state, and the second state of the main circuit is a closed state.

According to one or more embodiments of the present invention, the link gear includes a link gear part that links with the state of the main circuit of the cubical switchboard, the link gear part has first position and second position relative to the link gear base, the first position and the second position of link gear part respectively with the main circuit the first state and the second state correspond, the link gear part is configured to selectively interact with the follower, be in the first position the link gear part does not restrict the rotatory stroke of follower, be in the second position the link gear part restricts the rotatory stroke of follower.

In accordance with one or more embodiments of the present invention, the cable chamber door interlock is configured such that in a first state of the primary loop, the keeper member allows the push block assembly to move upward to the lift position, and in a second state of the primary loop, the keeper member prevents the push block assembly from moving upward to the lift position.

According to another aspect of the utility model, a cubical switchboard is provided, including cable chamber door and cable chamber door interlocking device.

Drawings

Fig. 1 illustrates a cable chamber door assembly, such as a cable chamber door assembly for a switchgear cabinet, according to some embodiments of the present invention;

2A-2C illustrate enlarged partial views of the cable compartment door assembly of FIG. 1, wherein FIG. 2A is a front view, FIG. 2B is a perspective view, and FIG. 2C is a side view;

fig. 3A illustrates a cable chamber door interlock mechanism, and fig. 3B illustrates a keeper piece of the cable chamber door interlock mechanism, according to some embodiments of the present disclosure;

4A-4E illustrate a cable chamber door and cable chamber door interlock in a raised position, where FIG. 4A is a front view, FIG. 4B is a partial perspective view, FIG. 4C is a partial enlarged view of the dashed box portion of FIG. 4B, and FIGS. 4D and 4E are views similar to FIGS. 4A and 4B with the mounting bracket removed to show some of the internal structure;

FIGS. 5A-5C illustrate a cable chamber door and cable chamber door interlock mechanism shown in a blocking position, wherein FIG. 5A is a front view, FIG. 5B is a partial perspective view, and FIG. 5C is a partial enlarged view of the dashed box portion of FIG. 5B;

fig. 6A shows a perspective view of a cable chamber door interlock mechanism including a cable chamber door hook latch mechanism, and fig. 6B shows a partial enlarged view of fig. 6A.

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 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 exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model provides a cable chamber door interlocking gear for cubical switchboard, interlocking gear include the installing support, promote block group spare, follower and keeper spare. Upward movement of the push block assembly when the cable compartment door is lifted up can cause rotational movement of the follower which in turn causes the latch member to move between the blocking and permitting positions. In the allowed position of the keeper member, the keeper member allows the push block assembly to move upwardly to the raised position, and in the blocked position of the keeper member, the keeper member blocks the push block assembly from moving upwardly to the raised position.

In the closed state of the switchgear cabinet, a linkage mechanism, which is linked to the state of the main circuit of the switchgear cabinet, limits the rotational travel of the follower, preventing the push block assembly from being moved to the raised position, preventing the cable compartment door from being removed. At this moment the utility model discloses a cable chamber door interlocking gear's keeper spare is also moved to the prevention position, acts as the prevention and promotes the piece subassembly and continue upwards to move to the essential element that the cable chamber door was opened. Through the utility model discloses a cable chamber door interlocking gear, the impact force when cable chamber door is lifted is mainly through the striking that promotes piece subassembly AND gate bolt spare and is absorbed by door bolt spare and installing support, and this impact force that has reduced the interlocking gear part greatly and received has protected the interlocking gear of cubical switchboard.

According to the utility model discloses a cable chamber door interlocking mechanism still includes cable chamber door hook locking mechanism, and this cable chamber door hook locking mechanism can prevent when cable chamber door removes from the cubical switchboard promote the piece subassembly from lifting the position and descending, and this and then can prevent the major loop of cubical switchboard from removing to the combined floodgate state from the separating brake state through cable chamber door interlocking mechanism and link gear, consequently guarantee maintenance personal's personal safety.

Fig. 1 shows a cable chamber door assembly 10, which is, for example, a cable chamber door assembly for a switchgear cabinet (not shown). Cable chamber door assembly 10 includes cable chamber door 20, linkage 30 and cable chamber door linkage 100 according to some embodiments of the present invention. Fig. 2A-2C show enlarged views of the cable chamber door assembly 10, wherein fig. 2A is a front view, fig. 2B is a perspective view, and fig. 2C is a side view.

The linkage 30 is a mechanism that links with the state of the main circuit of the switchgear, and includes a linkage base 32 and linkage components (not shown). In one or more embodiments according to the present disclosure, the linkage 30 may be a 2-position mechanism. The main circuit of the switchgear comprises at least a first state (e.g. an open state) and a second state (e.g. a closed state). The linkage 30 comprises a linkage part (not shown) which is linked to the state of the main circuit of the switchgear cabinet, the linkage part having a first position and a second position corresponding to the first state and the second state of the main circuit of the switchgear cabinet, respectively. In one or more embodiments according to the present disclosure, the linkage 30 may be a 3-position state. In this embodiment, the main circuit of the switchgear comprises at least three states, namely an open state, a closed state and a grounded state, and the linkage part of the linkage 30 has three positions corresponding to the three states of the main circuit of the switchgear, respectively. The linkage between the linkage mechanism 30 and the state of the main circuit of the switchgear and its realisation mechanism are known in the art and will not be described in detail here.

Fig. 3A illustrates a cable chamber door interlock 100, and fig. 3B illustrates a keeper piece 110 of the cable chamber door interlock 100, according to some embodiments of the present disclosure. As shown, the cable chamber door interlock 100 includes a keeper member 110, a mounting bracket 120, a pusher block assembly 130, a follower 140, and a main loop state stop 150. In one or more embodiments, the mounting bracket 120 is fixedly mounted to the linkage base 32. In other embodiments, the mounting bracket 120 may be fixedly mounted in other manners such that the mounting bracket 120 can be fixedly mounted relative to the linkage base 32.

The push block assembly 130 interacts with the cable compartment door 20 of the switchgear. Cable compartment door 20 is of the pull-up type, and when cable compartment door 20 is lifted up relative to door frame 24 for opening, push block assembly 130 is pushed up by the lifted cable compartment door 20, thereby moving upward relative to the mounting bracket 120, as indicated by arrow D1.

The follower 140 is pivotally mounted to the linkage base 32 by a pivot 142. As the pusher block assembly 130 moves upward as indicated by arrow D1, the pusher block 138 of the pusher block assembly 130 urges the follower 140 to rotate in a clockwise direction about the pivot axis 142 as indicated by arrow D2. The spring 148 applies a pulling force to the follower 140, biasing the follower 140 in a counterclockwise direction such that the follower 140 substantially rests on the pusher block 138 of the pusher block assembly 130 whether the pusher block assembly 130 is moved upwardly or downwardly.

The primary circuit state stop 150 is slidably mounted on the linkage base 32. When the follower 140 rotates in the clockwise direction indicated by the arrow D2, the follower 140 pushes the main circuit state stopper 150 to move in the direction indicated by the arrow D3. The movable travel of the main circuit state limiting block 150 in the direction indicated by the arrow D3 is dependent on the position of the linkage parts of the linkage 30, i.e. on the state of the main circuit of the switchgear. In the first state of the primary circuit (the open state), i.e., the first position of the linkage member, the primary circuit state limit block 150 may have an unrestricted first stroke in the direction indicated by arrow D3. In the second state of the main circuit (closed state), i.e., the second position of the linkage member, the movement of the main circuit state stopper 150 in the direction indicated by the arrow D3 is blocked by the linkage member to have a limited second stroke, which is shorter than the first stroke. Whether the travel of the main circuit state stopper 150 is limited herein refers to whether the travel of the main circuit state stopper 150 is limited by a link mechanism part of the link mechanism 30.

The keeper 110 is slidably mounted to the mounting bracket 120 and is capable of moving in a leftward or rightward direction with respect to the mounting bracket 120 as viewed in FIG. 3A. The keeper member 110 has a slot 112 formed therein and the follower 140 includes a protrusion 144. The protrusion 144 fits in the slot 112 so that rotational movement of the follower 140 about the pivot axis 142 can move the keeper 110 to the left and right. Specifically, clockwise movement of follower 140 will cause keeper 110 to move to the left and counterclockwise movement of the follower will cause keeper 110 to move to the right.

The mounting bracket 120 is provided with an opening 122. The latch member 110 includes a stopper 114 at a left end and a slot 116 adjacent to the stopper 114. When the keeper 110 is moved leftward, as indicated by arrow D4 of fig. 3A, a portion of the keeper 110, such as the blocking portion 114 of the keeper 110, may protrude from the opening 122 of the mounting bracket 120. The push block assembly 130 includes a striker portion 132. Depending on the position of the keeper 110, the strike portion 132 of the push block assembly 130 will be vertically aligned with the stop portion 114 of the keeper 110 or the slot portion 116 of the keeper 110. In the upward movement of the push block assembly 130, if the stop portion 114 of the keeper 110 is aligned with the strike portion 132 of the push block assembly 130, the stop portion 114 of the keeper 110 will block further upward movement of the push block assembly 130. The position of the keeper 110 at this time may be referred to as a blocking position. In the upward movement of the push block assembly 130, if the slot portion 116 of the keeper 110 is aligned with the strike portion 132 of the push block assembly 130, further upward movement of the push block assembly 130 is not prevented. The position of the keeper member 110 at this time may be referred to as an allow position, i.e., allowing further upward movement of the pusher block assembly 130. In the blocking position of the keeper 110, the pusher block assembly 130 is prevented from moving further upward, and thus the pull-up cable chamber door 20 is prevented from further upward, and thus the cable chamber door 20 cannot be removed.

Fig. 2A shows the initial position when cable chamber door 20 and cable chamber door interlock 100 are not lifted, i.e., the position when cable chamber door 20 is closed and not lifted, with cable chamber door 20, latch member 110 of cable chamber door interlock 100, mounting bracket 120, push block assembly 130, follower 140, and main loop state stop 150 all in their initial positions.

Fig. 4A-4E illustrate the lifted position of the cable chamber door 20 and the cable chamber door interlock 100, i.e., the position of the cable chamber door interlock 100 when the cable chamber door has been lifted, prepared for removal, or has been removed, wherein fig. 4A is a front view, 4B is a partial perspective view, fig. 4C is a partial enlarged view of the dashed-line box portion of fig. 4B, and fig. 4D and 4E are views similar to fig. 4A and 4B, wherein the mounting bracket 120 has been removed to clearly show the latch member 110.

When the main circuit of the switchgear is in the open state, the cable chamber door 20 is lifted ready for removal or has been removed, the cable chamber door interlock mechanism 100 is in the position shown in fig. 4A. At this time, since the main circuit is in the open state, the link mechanism part of the link mechanism 30 has no limitation on the stroke of the main circuit state limiting block 150, that is, the main circuit state limiting block 150 may have an unlimited first stroke. Further, the follower 140 and the push block assembly 130 each have an unlimited stroke, i.e., the stroke of the follower 140 and the push block assembly 130 is not limited by the linkage components of the linkage 30. As shown in fig. 4A, the push block assembly 130, the follower 140, the main circuit state stop 150, and the keeper member 110 have each reached their unlimited end of travel in the directions indicated by arrows D1, D2, D3, and D4, respectively. As best seen in fig. 4A and 4C, the blocking portion 114 of the keeper assembly 110 has now moved leftward beyond the strike portion 132 of the push block assembly 130, and the strike portion 132 of the push block assembly 130 is aligned with the slot portion 116 of the keeper assembly 110. Accordingly, the upward movement of the push block assembly 130 and the lifting of the cable chamber door 20 are not blocked by the blocking portion 114 of the latch member 110 and can reach the lifted position thereof.

Fig. 5A-5C illustrate blocking positions showing the cable compartment door 20 and the cable compartment door interlock 100, i.e., positions where the upward lifting of the cable compartment door and the upward movement of the push block assembly 130 are blocked by the keeper 110, wherein fig. 5A is a front view, 5B is a partial perspective view, and fig. 5C is a partial enlarged view of the dashed box portion of fig. 5B.

When the main loop of the switch cabinet is in a closed state, in order to ensure that the maintenance personnel can enter the switch cabinet and ensure the personal safety of the maintenance personnel, the cable chamber door interlocking mechanism 100 and the interlocking mechanism 30 can block the lifting of the cable chamber door 20, so that the lifting type cable chamber door 20 is prevented from being removed. At this time, since the main circuit is in the closed state, the link mechanism part of the link mechanism 30 limits the stroke of the main circuit state stopper 150 to the limited second stroke. The limited travel main circuit state stop 150, in turn, limits the rotational travel of the follower 140, and the limited rotational travel follower 140, in turn, limits the upward travel of the push block assembly 130. In the position shown in fig. 5A, the main circuit state stop 150, the follower 140, and the push block assembly 130 have all reached their limited end of travel. At this point, because of the limited travel of follower 140, keeper piece 110 of fig. 5A is relatively to the right compared to keeper piece 110 of fig. 4A. As best seen in fig. 5B and 5C, the stop portion 114 of the keeper member 110 is now aligned with the strike portion 132 of the push block assembly 130. Thus, the upward movement of push block assembly 130 and the lifting of cable compartment door 20 is blocked by blocking portion 114 of latch member 110, and cable compartment door 20 and cable compartment door interlock 100 cannot reach its lifted position. In some embodiments, the second stroke of the primary circuit state limit block 150 is 1/3 of its first stroke.

The dimensions of and positional relationship between the components of the cable chamber door interlock 100, such as the stop portion 114, the slot portion 116 of the latch member 110 and the strike portion 132 of the push block assembly 130, are precisely set such that when the primary circuit condition stop 150 initially reaches the end of its limited second travel, i.e., is limited to stopping by the linkage components of the linkage 30, the strike portion 132 of the push block assembly 130 has not yet moved upwardly into contact with the stop portion 114 of the latch member 110, and there is a small gap, such as a few millimeters, between the strike portion 132 of the push block assembly 130 and the stop portion 114 of the latch member 110. At this time, although the main circuit state stopper 150 has stopped due to the linkage mechanism component restriction of the linkage mechanism 30, under the upward force of the cable chamber door 20, since the components of the cable chamber door linkage 100, such as the push block assembly 130, are not completely rigid, they may be elastically deformed by a certain amount. The push block assembly 130 can continue to move upward due to elastic deformation of the components of the cable compartment door interlock 100 until its impact portion 132 strikes the stop portion 114 of the latch member 110. The upper surface of the blocking portion 114 of the keeper 110 contacts the upper surface of the opening 122 of the mounting bracket 120, thereby transmitting the impact force from the push block assembly 130 to the mounting bracket 120. Thus, cable chamber door interlock 100 of the present invention is able to transmit most of the impact force of the lifted cable chamber door 20 to mounting bracket 120 through blocking portion 114 of latch member 110 when the lifting of cable chamber door 20 is prevented. This greatly reduces the impact force on the linkage components of the linkage 30, protecting the linkage of the switchgear.

When the main circuit of the switch cabinet is in the open state, the link mechanism part of the link mechanism 30 has no limitation on the stroke of the main circuit state limiting block 150. At this time, when the main circuit state stopper 150 moves to a position corresponding to the limited stroke end shown in fig. 5A, there is a small gap between the striking portion 132 of the push block assembly 130 and the blocking portion 114 of the door bolt member 110. That is, at this time, the link mechanism part of the link mechanism 30 has no limitation on the stroke of the main circuit state stopper 150, and the stopper portion 114 of the keeper 110 does not block the push block assembly 130, so that the push block assembly 130 continues to move upward. Continued upward movement of the pusher block assembly 130, in turn, urges further rotation of the follower 140 in the clockwise direction, and further clockwise rotation of the follower 140 causes further movement of the keeper 110 in the leftward direction. Further movement of the keeper 110 in the leftward direction causes the blocking portion 114 of the keeper 110 to clear the strike portion 132 of the push block assembly 130 and the slot portion 116 of the keeper 110 to align with the strike portion 132 of the push block assembly 130. Thus, the components of the cable chamber door interlock mechanism 100 can reach the end of the unrestricted first stroke shown in fig. 4A.

As shown in fig. 3B and fig. 4D and 4E, a bevel 116a is provided between the blocking portion 114 and the slot portion 116 of the latch member 110. The bevel 116a helps to push the keeper 110 to its allowed position when the strike portion 132 of the pusher block assembly 130 collides with the keeper 110.

Fig. 6A shows a perspective view of the cable chamber door interlock mechanism 100 showing the cable chamber door hook latch mechanism 160, and fig. 6B shows a partial enlarged view of fig. 6A. The cable chamber door hook latch mechanism 160 includes a movable catch 162, the movable catch 162 including a hook portion 164. The pusher block assembly 130 includes a stop 134. The movable catch 162 of the cable chamber door catch locking mechanism 160 is movable between a locked position as shown in fig. 6A and 6B and an unlocked position (not shown). In the locked position of the movable catch 162, the movable catch 162 blocks the push block assembly 130 from descending from the raised position. As best shown in fig. 6B, in the locked position of the movable catch 162, the catch 164 of the movable catch 162 blocks the stop 134 of the push block assembly 130, thereby blocking the push block assembly 130 from descending from the raised position.

In addition, the cable chamber door of the switchgear cabinet can selectively interact with the movable catch 162 of the cable chamber door catch mechanism 160. When the cable compartment door of the switchgear cabinet is installed to the switchgear cabinet, the cable compartment door can move the movable catch 162 of the cable compartment door hook locking mechanism 160 from the locked position to the unlocked position. When the cable compartment door of the switchgear cabinet is removed from the switchgear cabinet, the cable compartment door removed from the switchgear cabinet allows the movable catch 162 of the cable compartment door hook locking mechanism 160 to enter the locked position from the unlocked position.

When the cable compartment door is lifted up and removed from the switchgear cabinet for, for example, service maintenance, the movable catch 162 of the cable compartment door catch mechanism 160 moves from the unlocked position to the locked position, for example, under the elastic force of a spring, thereby preventing the push block assembly 130 from falling from its lifted position. The push block assembly 130 in the raised position thereby ensures that the follower 140 and the main loop state stop 150 of the cable chamber door interlock 100 are in the position shown in fig. 4A. Since the main circuit state limiting block 150 is limited to the position shown in fig. 4A, it can prevent the main circuit of the switch cabinet from moving from the open state to the closed state through the linkage mechanism 30, thereby ensuring personal safety of the maintenance personnel.

When the cable compartment door is mounted to the switchgear cabinet, for example after the end of service maintenance, the cable compartment door mounted to the switchgear cabinet interacts with the movable catch 162 of the cable compartment door catch mechanism 160 to move it from the locked position to the unlocked position. Thereby pushing the block assembly 130 down from its raised position while the follower 140, the main circuit state stop 150 and the keeper 110 all return to the initial position shown in fig. 2A. The main circuit of the switchgear can now be safely moved from an open state to a closed state.

Some embodiments according to the present invention have been described above with reference to the accompanying drawings, however, the present invention is not limited thereto, and may have other modifications or embodiments. For example, in the embodiment shown in the drawings, the cable chamber door interlock includes a keeper member, a mounting bracket, a push block assembly, a follower, and a primary loop state stop that interacts with a linkage mechanism that limits the rotational travel of the follower via the primary loop state stop. In some other embodiments according to the present invention, the cable chamber door interlock may not include a primary loop state stop. At this time, the link mechanism may directly interact with the follower to limit the rotational stroke of the follower, or the link mechanism may limit the rotational stroke of the follower by other components than the main circuit state stopper.

In the embodiment shown in the figures, the cable chamber door interlock mechanism further includes a cable chamber door hook locking mechanism, however the invention is not limited thereto. In some other embodiments of the present invention, the cable compartment door interlock may not include a cable compartment door hook locking mechanism, or include other mechanisms for preventing the push block assembly from descending from its raised position when the cable compartment door is removed from the switchgear cabinet.

The figures illustrate specific forms and structures of the keeper member, mounting bracket, push block assembly, follower, and main loop state stop of the cable chamber door interlock, however the invention is not limited thereto. Within the scope of the present invention, the latch member, mounting bracket, push block assembly, follower and primary loop state stop of the cable chamber door interlock may have any suitable form and structure. For example, in the illustrated embodiment, the keeper 110 has a slot 112 formed therein and the follower 140 includes a protrusion 144. The protrusion 144 fits in the slot 112 so that rotational movement of the follower 140 about the pivot axis 142 can move the keeper 110 to the left and right. In other embodiments according to the invention, the follower may interact with the keeper member in any suitable manner, so long as the rotational movement of the follower about the pivot axis causes the left and right movement of the keeper member. For example, in the illustrated embodiment, the keeper 110 includes a stop and a slot adjacent the stop with a bevel disposed therebetween. In some other embodiments according to the invention, there may be no bevel between the blocking portion and the groove portion. In some other embodiments according to the invention, the blocking portion and/or the groove portion may have a different form or structure than that shown in the figures.

The above description is only for the purpose of illustrating exemplary embodiments of the principles of the present invention, and is not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also within the scope of the invention.

Claims (12)

1. A cable compartment door interlock for a switchgear cabinet, the switchgear cabinet including a primary circuit having a first state and a second state and a linkage mechanism that links with the state of the primary circuit of the switchgear cabinet, the linkage mechanism including a linkage mechanism base, the cable compartment door interlock comprising:

a mounting bracket fixedly mounted relative to the linkage base;

a push block assembly configured to move upwardly relative to the mounting bracket under the urging of the upward lifting action of the cable compartment door;

a follower including a pivot axis and configured to be rotatable about the pivot axis relative to the linkage base, upward movement of the push block assembly being capable of pushing the follower into rotational movement about the pivot axis, and the linkage being configured to selectively interact with the follower so as to not limit rotational travel of the follower in a first state of the primary circuit and to limit rotational travel of the follower in a second state of the primary circuit;

a keeper member engaged with the follower and configured to move relative to the mounting bracket between a blocking position and an allowing position upon actuation of rotational movement of the follower, the keeper member allowing the pusher block assembly to move upwardly to the raised position in the blocking position, the keeper member preventing the pusher block assembly from moving upwardly to the raised position in the allowing position.

2. The cable chamber door interlock mechanism for a switchgear cabinet of claim 1, wherein the unrestricted rotational travel of the follower allows the keeper to move to the allow position, and the restricted rotational travel of the follower prevents the keeper from moving to the allow position.

3. The cable chamber door interlock mechanism for a switchgear cabinet of claim 1, further comprising a main loop state stop configured to be movable relative to the linkage base driven by rotational movement of the follower, the main loop state stop interacting with the linkage, the linkage limiting the rotational travel of the follower by the main loop state stop.

4. The cable chamber door interlock mechanism for a switchgear cabinet of claim 3, wherein in the up-lifting position of the push block assembly, the main circuit state stop block prevents the main circuit from entering the second state from the first state through the interlock mechanism.

5. The cable chamber door interlock mechanism for a switchgear cabinet according to any one of claims 1 to 4, characterized in that the cable chamber door interlock mechanism further comprises a cable chamber door hook locking mechanism comprising a movable catch movable between a locked position, in which the movable catch prevents the push block assembly from descending from the lifted position, and an unlocked position, in which the movable catch allows the push block assembly to descend from the lifted position.

6. The cable chamber door interlock mechanism for a switchgear cabinet according to claim 5, characterized in that a cable chamber door mounted to the switchgear cabinet is configured to move the movable catch away from the locked position, while a cable chamber door removed from the switchgear cabinet allows the movable catch to enter the locked position.

7. The cable compartment door interlock mechanism for a switchgear cabinet of any one of claims 1-4, wherein the keeper member includes a blocking portion and a slot portion adjacent to the blocking portion, and the push block assembly includes an impact portion, and in the blocking position of the keeper member, the blocking portion of the keeper member is aligned with the impact portion of the push block assembly, and in the allowing position of the keeper member, the slot portion of the keeper member is aligned with the impact portion of the push block assembly.

8. The cable compartment door interlock mechanism for a switchgear cabinet of claim 7, wherein the movement of the push block assembly relative to the mounting bracket is a movement in a vertical direction and the movement of the keeper member relative to the mounting bracket is a movement in a horizontal direction, the mounting bracket including an opening against which the striker portion of the push block assembly can abut the keeper member in the blocking position.

9. The cable chamber door interlock mechanism for a switchgear cabinet according to any of claims 1-4, wherein the first state of the main circuit is an open state and the second state of the main circuit is a closed state.

10. The cable compartment door interlock mechanism for a switchgear cabinet according to any of claims 1-4, wherein the linkage mechanism comprises a linkage mechanism component that is linked with the state of the main circuit of the switchgear cabinet, the linkage mechanism component having a first position and a second position relative to a linkage mechanism base, the first and second positions of the linkage mechanism component corresponding to the first and second states of the main circuit, respectively, the linkage mechanism component being configured to selectively interact with the follower, the linkage mechanism component in the first position not limiting the rotational stroke of the follower, the linkage mechanism component in the second position limiting the rotational stroke of the follower.

11. The cable chamber door interlock mechanism for a switchgear cabinet according to any one of claims 1-4, wherein the cable chamber door interlock mechanism is configured such that in a first state of the main circuit, the door latch member allows the push block assembly to move upward to the raised position, and in a second state of the main circuit, the door latch member prevents the push block assembly from moving upward to the raised position.

12. A switchgear cabinet, characterized by comprising a cable compartment door and a cable compartment door interlocking mechanism for a switchgear cabinet according to any of claims 1-11.

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