A three-position knife switch operating device mechanism

Abstract

The application discloses a three-position knife switch switching operation device mechanism, which comprises a mechanism base, a knife switch switching handle, a linkage plate, a first limiting block, a second limiting block, a main shaft and a knife switch operation sleeve. The first limiting block is a grounding and switching limiting block. The second limiting block is a closing and switching limiting block. The first limiting block is arranged on the first side edge of the mechanism base. The second limiting block is arranged on the second side edge of the mechanism base. The first side edge and the second side edge are two non-adjacent side edges. The first limiting block and the second limiting block are both connected to the mechanism base in a sliding mode. The two ends of the linkage plate are connected to the first limiting block and the second limiting block respectively. The knife switch switching handle is arranged on the linkage plate. The knife switch operation sleeve is sleeved on the main shaft. The rotation center of the main shaft coincides with the rotation center of the knife switch operation sleeve. The mechanism is simple and reliable in structure, small in occupied space, easy to operate and maintain, and simple in knife switch switching and reliable in interlocking.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of three-position knife switch, in particular to a three-position knife switch switching operation device mechanism. BACKGROUND

[0002] At present, a part of the knife switch structure of vacuum circuit breaker is three-position structure, the so-called three-position structure is that the isolation knife and the grounding knife are the same knife installed on the pole upper movable contact seat position to make the sequence rotating action of closing, opening and grounding. This structure has the feature that the closing to opening and the opening to grounding must be operated in two steps, so a reliable knife switch switching operation device mechanism must be ensured to realize the opening, and the existing operation knife switch switching device mechanism in the market is a gear structure, which uses the operation handle to drive the gear linkage main shaft to realize the closing, opening and grounding. Although it is reliable, the structure is complex, the space is large, the two-step operation positions are separated in two places for operation, and it is not easy to operate. SUMMARY

[0003] In view of the defects of the prior art, the technical problem to be solved by the present application is to provide a three-position knife switch switching operation device mechanism, which aims to simplify the structure of the mechanism, reduce the overall size of the mechanism, reduce the occupied space of the mechanism, and simplify the knife switch switching operation of the mechanism.

[0004] To achieve the above-mentioned purpose, the present application provides a three-position knife switch switching operation device mechanism, which comprises a mechanism base, a knife switch switching handle, a linkage plate, a first limiting block, a second limiting block, a main shaft and a knife switch operation sleeve. The first limiting block is a grounding and opening limiting block. The second limiting block is a closing and opening limiting block. The first limiting block is arranged on the first side edge of the mechanism base. The second limiting block is arranged on the second side edge of the mechanism base. The first side edge and the second side edge are two non-adjacent side edges. The first limiting block and the second limiting block are connected with the mechanism base in a sliding connection mode. The two ends of the linkage plate are connected with the first limiting block and the second limiting block respectively. The knife switch switching handle is arranged on the linkage plate. The knife switch operation sleeve is sleeved on the main shaft. The rotation center of the main shaft coincides with the rotation center of the knife switch operation sleeve.

[0005] In the technical scheme, the first limiting block is provided with a sliding block structure, and the knife switch operating sleeve and the first limiting block jointly limit the three-position knife switch during grounding and opening operation of the vacuum circuit breaker; the second limiting block is provided with a sliding block structure, and the knife switch operating sleeve and the second limiting block jointly limit the three-position knife switch during closing and opening operation of the vacuum circuit breaker; the first limiting block and the second limiting block are provided with sliding block structures, which are different from the traditional gear structure, and the sliding block structure is simple and reliable, has few parts, is easy to process, and has low cost; the mechanism enables two-step operation positions to be operated in the same operation hole, thereby simplifying the operation and effectively reducing the operation difficulty; the linkage plate and the knife switch switching handle jointly switch the knife switch, and the operation is simple and the interlocking is reliable.

[0006] In an embodiment, the mechanism base is arranged on a circuit breaker panel.

[0007] In an embodiment, the main shaft has a rectangular cross section.

[0008] In the technical scheme, the main shaft has a rectangular cross section, so that the connection between the main shaft and the knife switch operating sleeve is more firm, and relative rotation between the main shaft and the knife switch operating sleeve during rotation of the knife switch operating sleeve is effectively prevented.

[0009] In an embodiment, the knife switch operating sleeve is provided with a first through hole matched with the main shaft; and the first through hole is in interference fit with the main shaft.

[0010] In the technical scheme, the first through hole is in interference fit with the main shaft, so that the knife switch operating sleeve is effectively prevented from falling off the main shaft.

[0011] In an embodiment, the linkage plate is connected to the end of the first limiting block and the end of the second limiting block at two ends thereof; and the first limiting block, the second limiting block and the linkage plate are rotationally connected.

[0012] In an embodiment, a first regular end is arranged at a first end of the first limiting block, and a first irregular end is arranged at a second end of the first limiting block; a second regular end is arranged at a third end of the second limiting block, and a second irregular end is arranged at a fourth end of the second limiting block; the first end and the third end are located on the same side and close to a third side edge of the mechanism base; and the second end and the fourth end are located on the same side and close to the knife switch operating sleeve.

[0013] In a specific embodiment, the linkage plate is rotationally connected with the mechanism base, and the connection point is located at the center of the linkage plate; the connection point and the center of the main shaft form a first connection line, and the first connection line is parallel to the first side.

[0014] The beneficial effects of the present application are as follows: in the present application, by setting the slider structure of the first limiting block, through the cooperation of the knife switch operating sleeve and the first limiting block, the limiting of the three-position knife switch is realized when grounding and opening the vacuum circuit breaker; by setting the slider structure of the second limiting block, through the cooperation of the knife switch operating sleeve and the second limiting block, the limiting of the three-position knife switch is realized when closing and opening the vacuum circuit breaker; by setting the slider structure of the first limiting block and the second limiting block, which is different from the traditional gear structure, the slider structure is simple and reliable, has few parts, is easy to process, and has low cost; through the mechanism, the two-step operation positions are operated in the same operation hole, the operation is simplified, and the operation difficulty is effectively reduced; through the cooperation of the linkage plate and the knife switch switching handle, the switching operation of the knife switch is realized, and the operation is simple and the interlocking is reliable; the mechanism occupies small space, has an attractive appearance, and is easy to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 FIG. 1 is a structural schematic diagram of a three-position knife switch switching operation device mechanism according to an embodiment of the present application;

[0016] Fig. 2 FIG. 2 is a connection relationship diagram of a three-position knife switch switching operation device mechanism and a vacuum circuit breaker according to an embodiment of the present application. DETAILED DESCRIPTION

[0017] The present application will be further described below in conjunction with the drawings and examples:

[0018] As Figs. 1-2As shown, in the specific embodiment of the present application, a three-position knife switch switching operation device mechanism is provided, which comprises a mechanism base 100, a knife switch switching handle 200, a linkage plate 300, a first limiting block 400, a second limiting block 500, a main shaft 600, and a knife switch operation sleeve 700. The first limiting block 400 is a grounding and switching limiting block. The second limiting block 500 is a closing and switching limiting block. The first limiting block 400 is arranged on the first side edge of the mechanism base 100. The second limiting block 500 is arranged on the second side edge of the mechanism base 100. The first side edge and the second side edge are two non-adjacent side edges. The first limiting block 400 and the second limiting block 500 are both connected to the mechanism base 100 in a sliding manner. The two ends of the linkage plate 300 are connected to the first limiting block 400 and the second limiting block 500, respectively. The knife switch switching handle 200 is arranged on the linkage plate 300. The knife switch operation sleeve 700 is sleeved on the main shaft 600. The rotation center of the main shaft 600 coincides with the rotation center of the knife switch operation sleeve 700.

[0019] In this embodiment, the mechanism base 100 is arranged on the circuit breaker panel 800.

[0020] In this embodiment, the cross section of the main shaft 600 is rectangular.

[0021] In this embodiment, the knife switch operation sleeve 700 is provided with a first through hole matched with the main shaft 600. The first through hole is in interference fit with the main shaft 600.

[0022] In this embodiment, the two ends of the linkage plate 300 are connected to the end of the first limiting block 400 and the end of the second limiting block 500, respectively. The first limiting block 400, the second limiting block 500, and the linkage plate 300 are all connected in a rotating manner.

[0023] In this embodiment, the first end of the first limiting block 400 is a first regular end, and the second end of the first limiting block 400 is a first irregular end. The third end of the second limiting block 500 is a second regular end, and the fourth end of the second limiting block 500 is a second irregular end. The first end and the third end are located on the same side and close to the third side edge of the mechanism base 100. The second end and the fourth end are located on the same side and close to the knife switch operation sleeve 700.

[0024] In this embodiment, the linkage plate 300 is connected to the mechanism base 100 in a rotating manner, and the connection point is located at the center of the linkage plate 300. The connection point and the center of the main shaft 600 form a first line, and the first line is parallel to the first side edge.

[0025] In the embodiment, the ground and open of the three-position knife switch 900 is realized by rotating the knife switch operating sleeve 700 in the counterclockwise direction, the close and open of the three-position knife switch 900 is realized by rotating the knife switch operating sleeve 700 in the clockwise direction, when the ground and open is to be operated, the first limiting block 400 is moved downward and the second limiting block 500 is moved upward by operating the knife switch switching handle 200, the ground and open is limited, when the close and open is to be operated, the second limiting block 500 is moved downward and the first limiting block 400 is moved upward by operating the knife switch switching handle 200, the close and open is limited, the mechanism is simple and reliable, the sliding block structure is used for limiting during operation, the parts are few, easy to process, the cost is less, the space is small, the appearance is beautiful, easy to maintain, the two-step operation position is operated in the same operation hole, easy to operate, the knife switch switching operation is simple and the interlocking is reliable.

[0026] The specific embodiments of the present application are described in detail above. It should be understood that the specific embodiments of the present application are not unique, and those skilled in the art can make many modifications and changes according to the concept of the present application within the scope of the claims. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the prior art according to the specific embodiments of the present application shall be within the protection scope determined by the claims.

Claims

1. A three-position knife switch switching operation device mechanism, characterized in that, The mechanism comprises a mechanism base, a knife gap switching handle, a linkage plate, a first limiting block, a second limiting block, a main shaft and a knife gap operating sleeve; the first limiting block is a grounding and switching limiting block; the second limiting block is a closing and switching limiting block; the first limiting block is arranged on a first side edge of the mechanism base; the second limiting block is arranged on a second side edge of the mechanism base; the first side edge and the second side edge are two non-adjacent side edges; the first limiting block and the second limiting block are both connected to the mechanism base in a sliding manner; two ends of the linkage plate are connected to the first limiting block and the second limiting block respectively; the knife gap switching handle is arranged on the linkage plate; the knife gap operating sleeve is sleeved on the main shaft; the rotation center of the main shaft coincides with the rotation center of the knife gap operating sleeve.

2. A triple position blade switching operating device mechanism as claimed in claim 1, characterized in that The mechanism base is arranged on a circuit breaker panel.

3. A triple position blade switch operating device mechanism as defined in claim 1, wherein The main shaft has a rectangular cross section.

4. A triple position blade switch operating device mechanism as defined in claim 1 wherein, The knife gap operating sleeve is provided with a first through hole matched with the main shaft; the first through hole is in interference fit with the main shaft.

5. A triple position blade switch operating device mechanism as defined in claim 1 wherein, Two ends of the linkage plate are connected to the end of the first limiting block and the end of the second limiting block respectively; the first limiting block, the second limiting block and the linkage plate are all connected in a rotating manner.

6. A triple position blade switch operating device mechanism as defined in claim 1 wherein, The first end of the first limiting block is a first regular end, and the second end of the first limiting block is a first irregular end; the third end of the second limiting block is a second regular end, and the fourth end of the second limiting block is a second irregular end; the first end and the third end are located on the same side and close to a third side edge of the mechanism base; the second end and the fourth end are located on the same side and close to the knife gap operating sleeve.

7. A triple position blade switch operating device mechanism as defined in claim 1 wherein, The linkage plate is connected to the mechanism base in a rotating manner, and the connection point is located at the center of the linkage plate; the connection point and the center of the main shaft form a first connection line, and the first connection line is parallel to the first side edge.

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