阅读说明：本技术 一种三相共箱开关 (Three-phase common-box switch ) 是由 魏建巍 谢世超 占小猛 江经华 谭盛武 段晓辉 柴影辉 孙清超 高远 张银穗 赵 于 2021-07-05 设计创作，主要内容包括：本发明涉及一种三相共箱开关,包括壳体,该壳体中设有三相触头结构,还包括操动机构,该操动机构包括机构箱和动力输出端,机构箱安装在壳体上；操动机构具有驱动轴,驱动轴由壳体外密封穿装入壳体内；所述驱动轴上设有动力输出部,所述传动杆上设有动力输入部,动力输入部位于一个边相触头触头结构与所述中相触头结构之间；所述动力输出部与所述动力输入部传动连接,以使得所述驱动轴驱动所述传动杆回转。驱动轴上的动力输出部与传功杆上的动力输入部传动连接,由于动力输入部位于一个边相触头结构与中相触头结构之间,减小了驱动轴与中相触头结构及边相触头结构之间的传动距离,提高了操动机构与各相触头结构之间的传动精度。(The invention relates to a three-phase common-box switch, which comprises a shell, an operating mechanism and a three-phase contact structure, wherein the shell is internally provided with the three-phase contact structure; the operating mechanism is provided with a driving shaft which is arranged in the shell in a penetrating way from the outer part of the shell; the driving shaft is provided with a power output part, the transmission rod is provided with a power input part, and the power input part is positioned between one side phase contact structure and the middle phase contact structure; the power output part is in transmission connection with the power input part, so that the driving shaft drives the transmission rod to rotate. The power output part on the driving shaft is in transmission connection with the power input part on the power transmission rod, and the power input part is positioned between the side phase contact structure and the middle phase contact structure, so that the transmission distance between the driving shaft and the middle phase contact structure and between the driving shaft and the side phase contact structure is reduced, and the transmission precision between the operating mechanism and each phase contact structure is improved.)

1. A three-phase common-box switch comprising:

the device comprises a shell (1), wherein a three-phase contact structure is arranged in the shell (1), the three-phase contact structure comprises two side-phase contact structures and a middle-phase contact structure (21), and a moving contact of the side-phase contact structure is in transmission connection with a moving contact of the middle-phase contact structure (21) through a transmission rod so as to realize synchronous action of the three-phase moving contact when the transmission rod rotates;

the operating mechanism (3), the operating mechanism (3) includes mechanism case (31) and power take-off, the power take-off drives the said drive link to rotate;

the method is characterized in that:

the mechanism box (31) is mounted on the shell (1);

the operating mechanism (3) is provided with a driving shaft (5), the driving shaft (5) is used as the power output end, and the driving shaft (5) is arranged in the shell (1) in a penetrating manner from the outer part of the shell (1);

a power output part is arranged on the driving shaft (5), a power input part is arranged on the transmission rod, and the power input part is positioned between one side phase contact structure and the middle phase contact structure (21);

the power output part is in transmission connection with the power input part, so that the driving shaft (5) drives the transmission rod to rotate.

2. A three-phase common-box switch according to claim 1, characterized in that the power input is exactly midway between the respective side and middle phase contact arrangement (21).

3. A three-phase common-box switch according to claim 1 or 2, characterized in that the driving shaft (5) is arranged crosswise to the transmission rod, and the power output of the driving shaft (5) and the power input of the transmission rod cooperate to form a worm gear transmission structure or a gear transmission structure.

4. A three-phase common box switch according to claim 3, characterized in that a support seat (6) is provided on the inner wall of the housing (1), the driving shaft (5) has an inner support end extending into the housing (1), and the inner support end is rotatably supported and fitted on the support seat (6).

5. The three-phase common-box switch according to claim 3, wherein the shell (1) comprises a shell body (11), the three-phase contact structure is arranged in the shell body (11), a through hole is arranged on the shell body (11), a sealing cover plate (12) is sealed at the position of the through hole, the mechanism box (31) is installed on the outer side of the sealing cover plate (12), and the driving shaft (5) penetrates through the sealing cover plate (12) in a sealing manner.

6. A three-phase common-box switch according to claim 5, characterized in that the driving shaft (5) and the cover plate (12) are in sealing fit by a shaft seal structure.

7. A three-phase common-box switch according to claim 3, characterized in that the drive shaft (5) is arranged perpendicularly crosswise to the drive rod.

8. A three-phase common-box switch according to claim 1 or 2, characterized in that the driving shaft (5) and the transmission rod extend in parallel, the power output part of the driving shaft (5) is a driving sprocket (51), the power input part of the transmission rod is a driven sprocket (411), and the driving sprocket (51) and the driven sprocket (411) are connected by a chain drive.

9. The three-phase common-box switch according to claim 8, wherein the housing (1) comprises a housing body (11), the three-phase contact structure is arranged in the housing body (11), a through hole is arranged on the housing body (11), a cover plate (12) is encapsulated in the through hole, a mounting shell (13) is integrally or separately arranged outside the cover plate (12), the mechanism box (31) is fixedly mounted on the housing body (11) or the mounting shell (13) so as to fixedly mount the mechanism box (31) on the housing (1), the driving shaft (5) penetrates into the mounting shell (13) in a sealing manner, and the driving sprocket (51) and the chain are located in the mounting shell (13).

10. The three-phase common box switch according to claim 9, wherein when the mechanism box (31) is fixedly installed at the installation shell (13), the installation shell (13) has a protruding support portion (130), a protruding extending direction of the protruding support portion (130) is parallel to the extending direction of the transmission rod, the mechanism box (31) is fixedly assembled with the protruding support portion (130), and the driving shaft (5) is sealingly penetrated into the protruding support portion (130), so that the driving shaft (5) is sealingly penetrated into the installation shell (13).

Technical Field

The invention relates to a three-phase common-box switch.

Background

High-voltage switchgear, especially GIS product gradually towards compact type development, especially the electric wire netting user puts forward standard interval requirement, under the convenient prerequisite of guaranteeing product fortune dimension, realizes high-voltage switchgear miniaturization and has become the key. The existing GIS product mostly adopts three-phase common box and three-phase mechanical linkage to realize product miniaturization design, as shown in fig. 1, a three-phase common box switch in the prior art comprises a shell, a three-phase contact structure is arranged in the shell, two adjacent phases in the three-phase contact structure are in transmission connection through a transmission rod, an operating mechanism is arranged outside the shell beside one side phase of the three-phase contact structure, the operating mechanism is in transmission connection with the side phase, but the interval between the operating mechanism and the contact structure is larger, an insulating rod for transmission needs to be added between the operating mechanism and the side phase contact structure, the cost is higher, the transmission distance between the output end of the operating mechanism and the side phase far away from the operating mechanism is too long, and the transmission precision is poor.

Disclosure of Invention

The invention aims to provide a three-phase common-box switch, which aims to solve the technical problem of poor transmission precision caused by overlong transmission part between an operating mechanism and a contact structure in the prior art.

In order to achieve the purpose, the technical scheme of the three-phase common-box switch provided by the invention is as follows: a three-phase common-box switch comprising:

the three-phase contact structure comprises two side phase contact structures and a middle phase contact structure, and a moving contact of the side phase contact structure is in transmission connection with a moving contact of the middle phase contact structure through a transmission rod so as to realize synchronous action of the three-phase moving contact when the transmission rod rotates;

the operating mechanism comprises a mechanism box and a power output end, and the power output end drives the transmission rod to rotate;

the mechanism box is arranged on the shell;

the operating mechanism is provided with a driving shaft which is used as the power output end, and the driving shaft is arranged in the shell in a penetrating way by being sealed from the outside of the shell;

the driving shaft is provided with a power output part, the transmission rod is provided with a power input part, and the power input part is positioned between one side phase contact structure and the middle phase contact structure;

the power output part is in transmission connection with the power input part, so that the driving shaft drives the transmission rod to rotate.

The beneficial effects are that: the three-phase common-box switch provided by the invention has the advantages that the mechanism box is directly arranged on the shell, the driving shaft of the mechanism box, which is used as a power output end, is directly and hermetically penetrated into the shell, in addition, the power output part on the driving shaft is in transmission connection with the power input part on the power transmission rod, and the power input part is positioned between the side phase contact structure and the middle phase contact structure, so that the synchronous action of the three-phase moving contact is ensured, the transmission distance between the driving shaft and the middle phase contact structure and between the driving shaft and the side phase contact structure is also reduced, and the transmission precision between the operating mechanism and each phase contact structure is improved. And in addition, the driving shaft is directly and hermetically arranged in the shell in a penetrating mode, the three-phase common-box switch is convenient to adapt, and the influence on the sealing performance of the three-phase common-box switch is reduced.

As a further improvement, the power input portion is in the middle of the respective side phase contact structure and the middle phase contact structure.

The beneficial effects are that: the power input part is positioned in the middle of the middle, so that the stress of the transmission rod is relatively uniform, the relative uniform stress of the transmission rod is ensured, and the rotation stability of the transmission rod is improved.

As a further improvement, the driving shaft and the transmission rod are arranged in a crossed manner, and the power output part of the driving shaft and the power input part of the transmission rod are matched to form a worm and gear transmission structure or a gear transmission structure.

The beneficial effects are that: the driving shaft and the transmission rod are arranged in a crossed manner, and a worm gear transmission structure or a gear transmission structure is formed, so that the internal transmission structure is simple and reliable, and is convenient to realize.

As a further improvement, a supporting seat is arranged on the inner wall of the shell, the driving shaft is provided with an inner supporting end, the inner supporting end extends into the shell, and the inner supporting end is rotatably supported and assembled on the supporting seat.

The beneficial effects are that: the supporting seat on the shell provides rotary support for the inner supporting end of the driving shaft, and can reduce radial runout of the driving shaft in the rotating process, so that the driving shaft can rotate stably.

As a further improvement, the housing comprises a housing body, the three-phase contact structure is arranged in the housing body, a through hole is arranged on the housing body, a sealing cover plate is packaged at the position of the through hole, the mechanism box is installed on the outer side of the sealing cover plate, and the driving shaft penetrates through the sealing cover plate in a sealing manner.

The beneficial effects are that: the casing includes shell body and closing cap board, installs the mechanism case in the closing cap board outside to make the drive shaft seal pass the closing cap board, simple structure conveniently realizes the assembly of mechanism case and casing.

As a further improvement, the driving shaft and the sealing cover plate are in sealing fit through a shaft seal structure.

The beneficial effects are that: set up the bearing seal structure between drive shaft and the closing plate, under the prerequisite of the sealed effect of effectively guaranteeing the three-phase and case the switch altogether, simplify the sealing measure and set up the degree of difficulty.

As a further improvement, the drive shaft is arranged perpendicularly across the drive rod.

The beneficial effects are that: the driving shaft and the transmission rod are vertically arranged, so that the driving shaft is convenient to mount, and the gear structure on the driving shaft is prevented from being separated from the gear structure on the transmission rod.

As a further improvement, the driving shaft and the transmission rod extend in parallel, the power output part of the driving shaft is a driving sprocket, the power input part of the transmission rod is a driven sprocket, and the driving sprocket and the driven sprocket are in transmission connection through a chain.

The beneficial effects are that: the driving shaft drives the corresponding transmission rod to rotate through the chain transmission mechanism, so that the driving precision is guaranteed, the accident is avoided, the whole structure is simple, and the realization is convenient.

As a further improvement, the housing includes a housing body, the housing body is provided with the three-phase contact structure, the housing body is provided with a through hole, a sealing cover plate is encapsulated at the position of the through hole, an installation housing is integrally or separately arranged on the outer side of the sealing cover plate, the mechanism box is fixedly installed on the housing body or the installation housing so as to fixedly install the mechanism box on the housing, the driving shaft penetrates into the installation housing in a sealing manner, and the driving sprocket and the chain are located in the installation housing.

The beneficial effects are that: set up on the shell body and seal the apron, set up the installation shell on sealing the apron, install the mechanism case on shell body or installation shell to make the drive shaft seal and penetrate in the installation shell, simple structure conveniently realizes the fixed Assembly of mechanism case and casing.

As a further improvement, when the mechanism case is fixedly mounted on the mounting case, the mounting case has a protruding support part, the protruding extending direction of the protruding support part is parallel to the extending direction of the transmission lever, the mechanism case is fixedly assembled with the protruding support part, and the driving shaft is hermetically penetrated into the protruding support part, so that the driving shaft is hermetically penetrated into the mounting case.

The beneficial effects are that: set up outstanding supporting part on the installation shell, conveniently realize the assembly of mechanism case and installation shell, simultaneously, conveniently realize that drive shaft and transfer line are arranged in parallel.

Drawings

FIG. 1 is a schematic diagram of a three-phase common-box switch in the prior art;

FIG. 2 is a schematic structural diagram of a three-phase common-box switch provided by the invention;

FIG. 3 is a schematic view of the assembly of the drive shaft and the drive link of FIG. 2;

fig. 4 is a schematic structural diagram of an embodiment 2 of the three-phase common-box switch provided by the present invention.

Description of reference numerals:

in fig. 1 to 3: 1. a housing; 11. a housing body; 12. sealing the cover plate; 121. mounting grooves; 2. a left phase contact structure; 21. a middle phase contact structure; 22. a right phase contact structure; 3. an operating mechanism; 31. a mechanism box; 311. an insertion part; 4. a left drive link; 41. a right drive link; 410. a driven helical gear; 5. a drive shaft; 51. a driving bevel gear; 6. a supporting seat; 61. a support groove; 7. a seal installation cylinder; 71. a Y-shaped seal ring; 72. sealing the mounting hole; 8. the cavity is sealed.

In fig. 4: 1. a housing; 11. a housing body; 12. sealing the cover plate; 13. mounting a shell; 130. a protruding support portion; 2. a left phase contact structure; 21. a middle phase contact structure; 22. a right phase contact structure; 3. an operating mechanism; 31. a mechanism box; 4. a left drive link; 41. a right drive link; 411. a driven sprocket; 5. a drive shaft; 51. a drive sprocket; 6. a Y-shaped seal ring; 7. sealing the cavity; 8. and a chain.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, which may be present in the embodiments of the present invention, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that "comprises an … …" is intended to indicate that there are additional elements of the same process, method, article, or apparatus that comprise the element.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

The present invention will be described in further detail with reference to examples.

Embodiment 1 of the three-phase common-box switch provided in the present invention:

as shown in fig. 1, in the prior art, in the three-phase common-box switch, the length of the link mechanism serving as the transmission part between the operating mechanism and the hexagonal shaft is large, so that the distance between the operating mechanism and the box body is long, the transmission part is easy to generate radial run-out, and most of the transmission part leaks out of the atmosphere, which is not favorable for sealing the box body. In the three-phase common-box switch provided by the invention, the operating mechanism 3 is in transmission connection with the transmission rod between the side phase contact structural member and the middle phase contact structure 21 in the three-phase contact structure, and the operating mechanism 3 is attached and sealed with the outer shell 1, so that the interval between the operating mechanism 3 and the shell 1 is reduced, and the operating mechanism 3 and the shell 1 are conveniently and hermetically mounted.

As shown in fig. 2 to 3, the three-phase common-box switch includes a casing 1, a three-phase contact structure is disposed in the casing 1, each phase contact structure is in transmission connection with a transmission rod, an operating mechanism 3 is mounted on an outer wall of the casing 1, and the operating mechanism 3 is in transmission connection with a right transmission rod 41 through a driving shaft 5 to drive the three-phase contact structure to synchronously operate.

The shell 1 comprises a shell body 11, the shell body 11 extends in the left-right direction, a three-phase contact structure is arranged in the shell body 11, a supporting seat 6 is fixedly arranged on the inner wall of the rear side of the shell body 11, a supporting groove 61 is arranged on the supporting seat 6, and the supporting groove 61 extends in the front-back direction to support the rear end of the driving shaft 5 to be rotatably inserted so as to increase the rotating stability of the driving shaft 5; the front side of the shell body 11 is provided with a through hole for the driving shaft 5 to pass through, a sealing cover plate 12 is arranged at the position of the through hole, the sealing cover plate 12 is connected with the shell body 11 through a bolt to form a complete shell 1, and the shell body 11 and the sealing cover plate 12 form a sealing cavity 8 for the sealing installation cylinder 7 to extend into.

The front side of closing cap board 12 is equipped with mounting groove 121 that caves in backward to supply mechanism case 31 seal installation, the trailing flank of closing cap board 12 is equipped with sealed installation section of thick bamboo 7, sealed installation section of thick bamboo 7 is arranged by extending forward backward, be equipped with sealed mounting hole 72 on the sealed installation section of thick bamboo 7, sealed mounting hole 72 link up closing cap board 12, pass in order to supply drive shaft 5 to support, sealed installation section of thick bamboo 7 still is equipped with a plurality of Y shape sealing rings, a plurality of Y type sealing rings 71 are along the suit in proper order on drive shaft 5 along fore-and-aft direction, in order to realize the sealed assembly of drive shaft 5 with closing cap board 12, and, sealed installation section of thick bamboo 7 stretches into sealed cavity 8 backward, further increase the sealing performance between drive shaft 5 and the closing cap board 12.

The operating mechanism 3 comprises a mechanism box 31, a driving component is arranged in the mechanism box 31 and drives the corresponding driving shaft 5 to rotate, and the driving shaft 5 serves as a power output end of the operating mechanism and is used for outputting opening and closing driving force to a three-phase contact structure of the three-phase common-box switch.

The mechanism box 31 is located at the front side of the housing 1, the rear side surface of the mechanism box 31 is provided with a plug-in part 311 in a protruding manner, the plug-in part 311 is plugged into the mounting groove 121 to form pre-positioning assembly, and the mechanism box 31 is conveniently connected with the cover plate 12 through bolts in the following process.

The three-phase contact structure is divided into a left phase contact structure 2, a middle phase contact structure 21 and a right phase contact structure 22 respectively, wherein the left phase contact structure 2 is in transmission connection with the middle phase contact structure 21 through a left transmission rod 4, the right phase contact structure 22 is in transmission connection with the middle phase contact structure 21 through a right transmission rod 41, and the left transmission rod 4 is in transmission connection with the right transmission rod 41, so that the left transmission rod 4 and the right transmission rod 41 synchronously act when the driving shaft 5 drives the right transmission rod 41 to transmit; the moving contact of each phase contact structure is provided with a rack which is used for being in transmission fit with straight gears on the left transmission rod and the right transmission rod, so that the moving contacts of the three-phase contact structure can synchronously act.

The left end of the left transmission rod 4 is provided with a left straight gear which is in transmission connection with the moving contact of the left phase contact structure 2 in a gear and rack matching mode, and the right end of the left transmission rod 4 is provided with a middle straight gear which is in transmission connection with the moving contact of the middle phase contact structure 21 in a gear and rack matching mode and is used for driving the moving contact of the middle phase contact structure 21 to move.

The driven bevel gear 410 is arranged in the middle of the right transmission rod 41, the driven bevel gear 410 serves as a power input part of the transmission rod and is used for being in meshing transmission with the driving bevel gear 51 of the driving shaft 5, and the right end of the right transmission rod 41 is provided with a right straight gear which is in transmission connection with the movable contact of the right phase contact structure 22 in a gear-rack matching mode and is used for driving the movable contact of the right phase contact structure 22 to act.

In order to connect the left transmission rod 4 and the right transmission rod 41 in a transmission manner, a connecting block is arranged between the left transmission rod 4 and the right transmission rod 41, square grooves are formed in the left side surface and the right side surface of the connecting block, a left square block is arranged at the right end of the left transmission rod 4, a right square block is arranged at the left end of the right transmission rod 41, the left square block is inserted into the left square groove of the connecting block, the right square block is inserted into the right square groove of the connecting block, and the transmission connection of the left transmission rod 4 and the right transmission rod 41 can be completed.

The driving shaft 5 extends along the front-back direction and is vertically crossed with the right transmission rod 41, the front end of the driving shaft 5 is in transmission connection with the operating mechanism 3 and is driven by the operating mechanism 3 to rotate so as to serve as the output end of the operating mechanism 3; the middle section of the driving shaft 5 extends into the shell body 11 through the cover plate 12; the rear end of the drive shaft 5 is inserted into the support groove 61; the driving bevel gear 51 is arranged on the driving shaft 5; the driving bevel gear 51 is sleeved on the driving shaft 5 and is in key connection with the driving shaft 5, the driving bevel gear 51 is used as a power output part of the driving shaft 5 to be meshed with the driven bevel gear 410 used as a power input part of the transmission rod, and when the driving shaft 5 is driven to rotate by the operating structure 3, the driving bevel gear 51 rotates to drive the driven bevel gear 410 to rotate so as to drive the transmission rod to rotate, and further, each phase contact structure is driven to synchronously act.

When the three-phase common-box switch is switched on, the operating mechanism 3 is started, the operating mechanism 3 drives the driving shaft 5 to rotate, the rotating driving shaft 5 drives the driving bevel gear 51 to rotate, the driving bevel gear 51 can drive the driven bevel gear 410 to rotate when rotating, the driving transmission rod is further driven to rotate, and the straight gear on the transmission rod rotates along with the transmission rod, so that the moving contact of the three-phase contact structure can synchronously perform switching-on action.

When the three-phase common-box switch is opened, the operating mechanism 3 is started, the operating mechanism 3 drives the driving shaft 5 to rotate reversely, the driving shaft 5 which rotates reversely drives the driving bevel gear 51 to rotate reversely, when the driving bevel gear 51 rotates reversely, the driven bevel gear 410 is driven to rotate reversely, the transmission rod is driven to rotate reversely, and the straight gear on the transmission rod rotates together with the transmission rod, so that the moving contact of the three-phase contact structure can be opened synchronously.

According to the three-phase common-box switch provided by the invention, the operating mechanism 3 is connected with the right transmission rod 41 between the right phase contact structure 22 and the middle phase contact structure 21, and the operating mechanism 3 is attached to the shell 1 and hermetically assembled, so that the transmission distance between the operating mechanism 3 and each phase contact structure is reduced, and the transmission precision between the operating mechanism 3 and the contact structure is improved.

Embodiment 2 of the three-phase common-box switch provided in the present invention:

the present embodiment is different from embodiment 1 in that in embodiment 1, the driving shaft 5 is arranged to intersect with the transmission rod, and the driving bevel gear 51 is used as a power output part of the driving shaft 5 to mesh with the driven bevel gear 411 used as a power input part of the transmission rod for transmission, so that when the driving shaft 5 rotates, the transmission rod is rotated. In the embodiment, the driving shaft 5 is arranged in parallel with the transmission rod, and the driving shaft 5 is in chain transmission connection with the transmission rod through a chain wheel.

In specific implementation, as shown in fig. 4, in order to mount the operating mechanism 3 on the housing 1, the outer side of the cover plate 12 is provided with a mounting shell 13, the mounting shell 13 is connected to the housing body 11 by bolts, the mounting shell 13 is provided with a protruding support portion 130, the mechanism box 31 of the operating mechanism 3 is fixedly assembled with the protruding support portion 130, specifically, the protruding support portion 130 is assembled in a flange connection manner, the protruding support portion 130 extends in the left-right direction, so that one end of the driving shaft 5, which is far away from the operating mechanism 3, horizontally extends into the protruding support portion 130, the driving shaft 5 is sleeved with a plurality of Y-shaped seal rings 6, so that the driving shaft 5 and the protruding support portion 130 are hermetically and rotatably assembled, one end of the driving shaft 5, which is close to the operating mechanism 3, is in transmission connection with the operating mechanism 3 to serve as a power output end of the operating mechanism 3, an end of the driving shaft 5, which extends into the protruding support portion 130, is provided with a driving sprocket 51, the driving sprocket 51 is sleeved on the driving shaft 5, and is fixedly connected with the driving shaft 5 by a key, and the driving chain wheel 51 is used as a power output part of the driving shaft 5; the right transmission rod 41 is provided with a driven sprocket 411 in the middle, the driven sprocket 411 is used as a power input part of the transmission rod and is in transmission connection with a driving sprocket 51 used as a power output part of the driving shaft 5 through a chain 8, the chain 8 hermetically extends into the shell body 1 through the mounting shell 13, when the driving shaft 5 rotates, the driving sprocket 51 is driven to rotate, and the rotating driving sprocket 51 drives the driven sprocket 411 to rotate through the chain 8, so that the transmission rod rotates.

Since the meshing accuracy between the sprocket and the chain is higher than that between the two gears, more accurate transmission between the drive shaft 5 and the transmission rod can be achieved in this embodiment than in embodiment 1.

Embodiment 3 of the three-phase common-box switch provided in the present invention:

the difference between this embodiment and embodiment 1 is that, in embodiment 1, the left phase contact structure 2 is in transmission connection with the middle phase transmission structure through the left transmission rod 4, the right phase contact structure 22 is in transmission connection with the middle phase transmission structure through the right transmission rod 41, and the left transmission rod 4 is in transmission connection with the right transmission rod 41 through the square structure. In the embodiment, the transmission rod is integrally designed, and the transmission rod is provided with straight gears corresponding to the positions of the contact structures, and each straight gear is in transmission fit with the rack of the corresponding contact structure.

Embodiment 4 of the three-phase common-box switch provided in the present invention:

the present embodiment is different from embodiment 1 in that embodiment 1, the driven helical gear 410 is arranged in the middle of the right rotating lever. In the present embodiment, the driven bevel gear 410 is disposed on the right transmission rod 41 in a manner of deviating from the middle phase transmission structure, so as to reduce the transmission distance between the driving shaft 5 and the middle phase contact structure 21 and the left phase contact structure 2, and accordingly improve the transmission accuracy between the driving shaft 5 and the middle phase contact structure 21 and the left phase contact structure 2, but the transmission accuracy between the driving shaft 5 and the right phase contact structure 22 is reduced.

Embodiment 5 of the three-phase common-box switch provided in the present invention:

the present embodiment is different from embodiment 1 in that, in embodiment 2, the mechanism case is mounted on the protruding support portion. In this embodiment, the mechanism box is fixedly installed on the housing body, and specifically, a flange connection structure may be disposed on another sealing cover plate on the housing body to install the mechanism box, and at the same time, the driving shaft of the operating mechanism is sealed to penetrate into the protruding supporting portion, so as to ensure that the driving shaft can normally drive the transmission rod to rotate.

In addition, in the embodiment 1, the mounting case provided with the protruding support portion is integrally provided on the sealing cover plate, and in this embodiment, the mounting case may also be fixedly mounted on the sealing cover plate by a flange connection structure.

Example 6 of the three-phase common-box switch provided in the present invention:

the present embodiment is different from embodiment 1 in that in embodiment 1, the driving bevel gear 51 is used as a power output part of the driving shaft 5 to mesh with the driven bevel gear 411 used as a power input part of the transmission rod for transmission, so that when the driving shaft 5 rotates, the transmission rod is driven to rotate. In the embodiment, the driving shaft 5 is provided with a worm section, the worm section is used as a power output part of the driving shaft 5, a worm wheel is arranged in the middle of the right transmission rod 41, the worm wheel is used as a power input part of the transmission rod, the worm and the worm wheel are in meshing transmission, and the worm section of the driving shaft 5 drives the worm wheel to rotate when rotating, so that the transmission rod rotates.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.