CN112735897B - Grounding switch and interphase coupling device thereof - Google Patents

Abstract

The utility model relates to a grounding switch and an inter-phase coupling device thereof, wherein the inter-phase coupling device comprises: two coupling members; each coupling piece is provided with a connecting plate part, and each connecting plate part is detachably or movably provided with a connecting rod fixing piece for press-fitting and fixing the corresponding side main shaft connecting rod on the corresponding connecting plate part through the connecting rod fixing piece; each coupling piece is provided with a clamping plate part, the clamping plate parts are vertically arranged with the connecting plate parts, and the two clamping plate parts are oppositely arranged at intervals to form a clamping gap for inserting a cutter bar correspondingly; the bolt fastening structure forces the two clamping plate parts to clamp and fix the corresponding cutter bar. The interphase coupling device is used for installing a main shaft for connection and fixedly installing a grounding cutter bar, is good in inheritance, and can concentrate installation positions on the interphase coupling device for a grounding switch, so that the assembly precision is conveniently and effectively controlled.

Description

A grounding switch and its interphase coupling device

Technical field

The invention belongs to the technical field of grounding switches, and specifically relates to a grounding switch and its interphase coupling device.

Background technique

The three-phase grounding switch is used to ensure the safety of the entire circuit grounding. In order to ensure the grounding effect, it is necessary to make the ground cutter bar and the static contact open and close synchronously. This puts forward higher requirements for the synchronous transmission, processing and transmission accuracy of the grounding switch. . Moreover, during the on-site installation and adjustment process of the grounding switch, repeated three-phase opening and closing operations are required to adjust the product to the optimal use state. During the adjustment process, the transmission mechanism needs to be repeatedly disassembled and assembled, and if during operation, If there is a gap between the parts of the grounding switch product, causing the components to not close properly, it is necessary to untie the transmission chain and readjust it, which is time-consuming and laborious.

The Chinese utility model patent with the authorization announcement number CN203013596U discloses a grounding switch structure with adjustable installation position, including interphase connecting rods. The interphase connecting rods are composed of sub-interphase connecting rods fixedly connected together through hoops. The interphase connecting rods are The rod is driven to rotate by the operating mechanism, and the interphase connecting rod is tightly held and fixed by the hoop to fix the three-phase movable contact assembly. When the interphase connecting rod rotates, the three-phase movable contact assembly and the corresponding static contact assembly are driven to open and close operations. By fixing the assembly with the hoop, the grounding switch has a detachable structure, and the hoop can be loosened during adjustment to achieve adjustment. In the above grounding switch, the moving contact assembly includes a support plate, an aluminum conductive voltage block, a hoop, an aluminum tube welding contact finger support and a copper contact finger. Among them, the aluminum conductive block and the support plate are clamped together by bolts. The contact finger support, as a whole, is tightly held on the alternating connecting rods through the holding hoop.

In the above-mentioned grounding switch, the sub-phase connecting rods are fixedly connected by clamps to form an interphase connecting rod, and then fixedly connected to the moving contact assembly by support plates, clamps and other structures. The connection positions of the sub-phase connecting rods and the connection positions of the moving contact assembly and the phase connecting rods are staggered. Each assembly structure is either only used to assemble the interphase connecting rods or only used to assemble the moving contact assembly, resulting in a large number of assembly positions in the entire transmission structure, which is prone to accumulate assembly errors and is not conducive to ensuring assembly accuracy.

Summary of the invention

The object of the present invention is to provide a phase-to-phase coupling device for a grounding switch to solve the problem that in the transmission structure of the grounding switch in the prior art, each assembly structure is only used to assemble the inter-phase connecting rods or is only used to assemble the movable contact assembly, resulting in the entire The technical problem of too many assembly positions in the transmission structure. At the same time, the present invention also provides a grounding switch using the above-mentioned inter-phase coupling device.

To achieve the above object, the technical solution of the interphase coupling device of the grounding switch provided by the present invention is: an interphase coupling device of the grounding switch, comprising:

Two coupling parts are arranged in sequence along the left and right directions, used in conjunction to clamp and fix the corresponding tool arbor and are drivingly connected to the spindle connecting rods on the corresponding sides;

Each coupling piece has a connecting plate portion, which extends along the left and right directions. Each connecting plate portion is detachably or movably equipped with a connecting rod fixing piece, or each connecting plate portion is provided with a fixing piece. An installation structure, which is used to detachably or movably assemble the connecting rod fixing part, and is used to press-fit and fix the corresponding spindle connecting rod on the corresponding connecting plate part through the connecting rod fixing part;

Each coupling piece has a clamping plate portion, which is arranged perpendicularly to the connecting plate portion. The two clamping plate portions are relatively spaced apart to form a clamping gap for the corresponding tool bar to be inserted;

The bolt tightening structure applies opposing forces to the two plywood parts, forcing the two plywood parts to clamp and fix the corresponding tool shank.

The beneficial effect is that in the interphase coupling device of the grounding switch provided by the present invention, the two connecting plate parts on the two coupling parts can be used to cooperate with the connecting rod fixing part to fix the corresponding side main shaft connecting rod on the connecting plate part, and the two clamping plate parts on the two coupling parts can be used to clamp and fix the corresponding grounding knife rod, so as to realize the fixed assembly of the grounding knife rod and the main shaft on the grounding switch. The interphase coupling device is used for both installing the main shaft connection and fixing the grounding knife rod, and has good inheritance. For the grounding switch, the installation positions can be concentrated on the interphase coupling device, which is convenient for effectively controlling the assembly accuracy. Moreover, the connecting rod fixing part and the bolt fastening structure are used to facilitate the position adjustment of the main shaft connecting rod and the grounding knife rod relative to the coupling part.

As a further improvement, the connecting plate portion of each coupling is provided with a connecting rod mounting groove respectively. The connecting rod mounting groove extends in the left and right directions, and has an open structure on one side for the main shaft connecting rod of the corresponding side to be assembled. The connecting rod fixing piece press-fits and fixes the corresponding spindle connecting rod in the connecting rod installation groove;

The relatively inner surfaces of the splint portions of each coupling are respectively provided with ground cutter bar mounting grooves for positioning and accommodating the ground cutter bar.

The beneficial effects are: utilizing the connecting rod installation groove to conveniently position and place the main shaft connecting rod, utilizing the ground tool rod installation groove to place the ground tool rod, thereby improving assembly efficiency and ensuring assembly effect.

As a further improvement, the connecting rod mounting groove is a semicircular groove.

As a further improvement, a weight reduction escape hole is provided in the center of each splint part, and the weight reduction escape hole corresponds to the connecting rod mounting groove on the corresponding coupling.

The beneficial effects are: setting up weight reduction avoidance holes can play an avoidance role on the one hand and eliminate the influence of assembly errors, and on the other hand can have a weight reduction effect.

As a further improvement, a plurality of grooves are provided on the inner wall surface of the connecting rod mounting groove to increase the friction between the connecting rod mounting groove and the corresponding main shaft connecting rod.

The beneficial effects are: setting grooves, increasing static friction, and improving the fastening assembly effect.

As a further improvement, the grooves extend in the left-right direction, and multiple grooves are sequentially distributed along the width direction of the connecting rod mounting groove.

The beneficial effect is: the groove extends in the left and right directions, which facilitates processing.

As a further improvement, the notches of the two connecting rod mounting grooves on the two coupling parts face opposite directions.

The beneficial effect is: the notches of the two connecting rod installation grooves are opposite, which facilitates the optimization of the force on the entire spindle in the grounding switch.

As a further improvement, the ground cutter bar mounting grooves on the two coupling parts have a through-groove structure with both ends open.

The beneficial effects are: the installation groove of the ground cutter bar is a through-groove structure, which facilitates the arrangement of the ground cutter bar.

As a further improvement, each coupling is detachably equipped with the connecting rod fixing part, and the connecting rod fixing part is a hoop or a U-shaped bolt.

The beneficial effect is: using hoops or U-shaped bolts as connecting rod fixings to facilitate fastening assembly.

The technical solution of the grounding switch using the above-mentioned inter-phase coupling device provided by the present invention is: a grounding switch, including:

A main shaft, the axial direction of which extends in the left-right direction, is used to be driven to rotate by the operating mechanism;

Three grounding rods are fixed on the main shaft in sequence and at intervals along the left and right directions, and are driven to rotate by the main shaft to control the opening and closing of the grounding switch;

The main shaft comprises four main shaft connecting rods arranged coaxially, the four main shaft connecting rods comprise two interphase connecting rods and two side connecting rods, any two adjacent connecting rods among the four main shaft connecting rods are respectively fixedly assembled by interphase coupling devices, so that the four main shaft connecting rods are fixedly assembled together by three interphase coupling devices, each ground knife rod is correspondingly fixedly assembled on an interphase coupling device, and each interphase coupling device comprises:

Two coupling parts are arranged in sequence along the left and right directions, used in conjunction to clamp and fix the corresponding tool arbor and are drivingly connected to the spindle connecting rods on the corresponding sides;

Each coupling piece has a connecting plate portion, which extends along the left and right directions. Each connecting plate portion is detachably or movably equipped with a connecting rod fixing piece, or each connecting plate portion is provided with a fixing piece. An installation structure, which is used to detachably or movably assemble the connecting rod fixing part, and is used to press-fit and fix the corresponding spindle connecting rod on the corresponding connecting plate part through the connecting rod fixing part;

Each coupling piece has a clamping plate portion, which is arranged perpendicularly to the connecting plate portion. The two clamping plate portions are relatively spaced apart to form a clamping gap for the corresponding tool bar to be inserted;

The bolt tightening structure applies opposing forces to the two plywood parts, forcing the two plywood parts to clamp and fix the corresponding tool shank.

The beneficial effects are: in the grounding switch provided by the present invention, three interphase coupling devices are used on the main shaft to realize the fastening assembly of four main shaft connecting rods. For the interphase coupling device, two couplings on the two coupling parts are used. The connecting plate part can cooperate with the connecting rod fixing piece to fix the main shaft connecting rod on the corresponding side on the connecting plate part, and use the two clamping plate parts on the two coupling parts to clamp and fix the corresponding ground knife rod, so as to realize the ground knife rod on the grounding switch. And the fixed assembly of the spindle, the interphase coupling device is used not only to install the spindle connection, but also to fix the installation of the tool bar, which has good inheritance. For the grounding switch, the installation positions can be concentrated on the interphase coupling device, which is convenient Effectively control assembly accuracy. Moreover, the position adjustment of the spindle connecting rod and the ground cutter bar relative to the coupling is facilitated by using the connecting rod fixing part and the bolt fastening structure.

As a further improvement, the connecting plate portion of each coupling is provided with a connecting rod mounting groove respectively. The connecting rod mounting groove extends in the left and right directions, and has an open structure on one side for the main shaft connecting rod of the corresponding side to be assembled. The connecting rod fixing piece press-fits and fixes the corresponding spindle connecting rod in the connecting rod installation groove;

The relatively inner surfaces of the splint portions of each coupling are respectively provided with ground cutter bar mounting grooves for positioning and accommodating the ground cutter bar.

The beneficial effects are: the connecting rod mounting groove is used to facilitate positioning and placement of the spindle connecting rod, and the ground cutter bar mounting groove is used to place the ground cutter bar, which can improve the assembly efficiency and ensure the assembly effect.

As a further improvement, the connecting rod mounting groove is a semicircular groove.

As a further improvement, a weight reduction escape hole is provided in the center of each splint part, and the weight reduction escape hole corresponds to the connecting rod mounting groove on the corresponding coupling.

The beneficial effects are: setting up weight reduction avoidance holes can play an avoidance role on the one hand and eliminate the influence of assembly errors, and on the other hand can have a weight reduction effect.

As a further improvement, a plurality of grooves are arranged on the inner wall surface of the connecting rod installation groove to increase the friction between the connecting rod installation groove and the corresponding main shaft connecting rod.

The beneficial effects are: setting grooves, increasing static friction, and improving the fastening assembly effect.

As a further improvement, the grooves extend in the left-right direction, and multiple grooves are sequentially distributed along the width direction of the connecting rod mounting groove.

The beneficial effect is: the groove extends in the left and right directions, which facilitates processing.

As a further improvement, the notches of the two connecting rod mounting grooves on the two coupling parts face opposite directions.

The beneficial effect is: the notches of the two connecting rod installation grooves are opposite, which facilitates the optimization of the force on the entire spindle in the grounding switch.

As a further improvement, the ground cutter bar mounting grooves on the two coupling parts have a through-groove structure with both ends open.

The beneficial effects are: the installation groove of the ground cutter bar is a through-groove structure, which facilitates the arrangement of the ground cutter bar.

As a further improvement, each coupling is detachably equipped with the connecting rod fixing part, and the connecting rod fixing part is a hoop or a U-shaped bolt.

The beneficial effect is: using hoops or U-shaped bolts as connecting rod fixings to facilitate fastening assembly.

Description of drawings

Figure 1 is a schematic structural diagram of the grounding switch provided by the present invention;

Figure 2 is a schematic structural diagram of the interphase coupling device in Figure 1;

Figure 3 is a schematic structural diagram of the coupling in Figure 2;

Figure 4 is a front view of the coupling shown in Figure 3;

Figure 5 is a top view of Figure 4;

FIG. 6 is a half-sectional view of FIG. 4 .

Description of reference numerals:

1. Ground tool rod; 2. Spindle connecting rod; 21. Left side connecting rod; 22. Left phase connecting rod; 23. Right phase connecting rod; 24. Right side connecting rod; 3. Phase coupling device; 30. Coupling; 31. Connecting plate; 310. Connecting rod mounting groove; 311. Groove; 312. Radial hole; 32. Clamping plate; 320. Ground tool rod mounting groove; 321. Weight reduction avoidance hole; 33. U-bolt; 34. Fastening bolt.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention. That is, the described embodiments are only some embodiments of the present invention, rather than all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the invention provided in the appended drawings is not intended to limit the scope of the claimed invention, but rather to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present invention.

It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations are mutually exclusive. any such actual relationship or sequence exists between them. Furthermore, the terms "comprises," "comprises," or any other variation thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment. Without further limitation, elements defined by the statement "comprises a..." do not exclude processes and methods that include said elements.

In the description of the present invention, unless otherwise explicitly stipulated and limited, the terms "installation", "connection" and "connection" that may appear should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

In the description of the present invention, it should be noted that, unless otherwise expressly stipulated and limited, the term "is provided with" that may appear should be understood in a broad sense. For example, the object of "is provided with" can be a part of the ontology, or it can be It is arranged separately from the body and connected to the body. The connection can be a detachable connection or a non-detachable connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

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

Specific embodiment 1 of the grounding switch provided by the present invention:

In the grounding switch provided by the present invention, adjacent spindle connecting rods 2 are fixedly assembled together using interphase coupling devices 3 to form a spindle. Each interphase coupling device 3 is fixedly installed with an adjustable ground knife. When assembling the rod 1, each spindle connecting rod 2 and the ground tool rod 1 can be directly assembled with the three alternate coupling devices 3. The assembly position is centralized, which facilitates control of the assembly accuracy. During adjustment, it is convenient to carry out separate phase assembly and disassembly adjustment for the phase to be adjusted to meet the debugging needs.

The structure of the grounding switch provided in this embodiment is shown in Figures 1 to 6, and includes a main shaft extending in the left-right direction. The main shaft is used to be driven to rotate by an operating mechanism. The operating mechanism can drive the main shaft to rotate through a connecting rod mechanism. Three grounding rods 1 are fixedly installed on the main shaft at intervals in sequence along the left-right direction. When working, the main shaft is driven to rotate by the operating mechanism, and the main shaft rotates with the three grounding rods 1 to control the opening and closing operations of the grounding switch.

In this embodiment, the main shaft mainly includes four main shaft connecting rods 2 , and the four main shaft connecting rods 2 are fixedly assembled together through three interphase coupling devices 3 . The four spindle connecting rods 2 include two alternate connecting rods and two side connecting rods. The two side connecting rods are located on both sides of the two alternate connecting rods, namely the left side connecting rod 21 and the right side connecting rod. 24. The two interphase connecting rods are the left interphase connecting rod 22 and the right interphase connecting rod 23. The left side connecting rod 21 and the left interphase connecting rod 22 are fixedly assembled together through the left interphase coupling device 3. The two interphase connecting rods are fixedly assembled together through the interphase coupling device 3 in the middle. The right interphase connecting rod 23 and the right side connecting rod 24 are fixedly assembled together through the interphase coupling device 3 on the right side. The three floor knives The rod 1 is fixedly assembled on the three interphase coupling devices 3 in one-to-one correspondence.

The three interphase coupling devices 3 have the same structure. Here, the structure of the middle interphase coupling device 3 is introduced as an example, and it is explained how to assemble the main shaft connecting rods 2 on the corresponding two sides and how to fix the assembled tool rod 1.

The structure of the middle interphase coupling device 3 is shown in Figures 2 to 6, including two couplings 30 arranged sequentially in the left and right directions, for use in conjunction with clamping and fixing the corresponding cutter bar 1 and with the corresponding two sides. The spindle connecting rod 2 is connected in transmission. The two coupling members 30 here have the same structure, and respectively include a splint portion 32 extending vertically up and down and a connecting plate portion 31 extending transversely to the left and right. The connecting plate portion 31 is used to fix and assemble the corresponding spindle connecting rod 2. The two coupling parts 30 have the same structure. The clamping plate portion 32 of the coupling 30 is used to clamp and fix the corresponding cutter bar 1 .

In this embodiment, the connecting plate portion 31 of each coupling 30 is respectively provided with a connecting rod mounting slot 310. The connecting rod mounting slot 310 extends in the left and right directions, and has an opening structure on one side for the main shaft of the corresponding side. The connecting rod 2 is assembled, and two U-shaped bolts 33 are detachably fixed and installed on the connecting plate portion 31. The two U-shaped bolts 33 are spaced apart in the left and right directions. The two U-shaped bolts 33 here serve as connecting rod fixings. The corresponding spindle connecting rod 2 assembled in the connecting rod mounting groove 310 can be fixed in the connecting rod mounting groove 310 .

The connecting rod installation groove 310 is a semicircular groove, which is used to match the shape of the main shaft connecting rod 2. In order to enhance the static friction, a groove 311 is provided on the inner wall surface of the connecting rod installation groove 310, and the groove 311 extends in the left-right direction. Here, there are multiple grooves 311 distributed in sequence along the width direction of the connecting rod installation groove 310. The groove 311 can be a rectangular groove or a trapezoidal groove, which can effectively ensure the static friction on the main shaft connecting rod 2.

Furthermore, it should be noted that, in order to balance the force on the entire main shaft, the notches of the two connecting rod mounting grooves 310 on the two coupling members 30 face opposite directions.

In addition, in order to improve the tightening force, a radial hole 312 is provided at the bottom of the connecting rod mounting groove 310, and a set screw can be inserted into the radial hole 312 to improve the fixed assembly of the main shaft connecting rod 2 and the connecting plate portion 31. Effect.

For the two coupling parts 30, the two plywood portions 32 are arranged oppositely, and a ground cutter bar mounting groove 320 is provided on the opposite inner side of each plywood portion 32 for positioning and accommodating the ground cutter bar 1. The two ground cutter bar mounting grooves 320 The extending direction is perpendicular to the left and right directions, and the two tool bar mounting grooves 320 are both rectangular grooves, and both have through-slot structures with both ends open, so that the tool bar 1 can be easily telescopically adjusted in the ground tool bar mounting grooves 320 . In fact, this slot structure is also convenient for the cutter bar 1 to pass through, because a counterweight is usually provided at the tail of the cutter bar 1 to save the reset operation force.

The two coupling members 30 are assembled together by fastening them toward each other through a bolt fastening structure, and the bolt fastening structure applies a fastening force toward each other to the two clamping plate parts 32 to clamp the corresponding ground cutter bar 1. The clamping plate part 32 here is a square plate, and bolt mounting holes are respectively provided at the four corners of the corresponding square plate. The bolt fastening structure includes bolt mounting holes on the two clamping plate parts 32 and four fastening bolts 34 correspondingly inserted into the bolt mounting holes. During assembly, the ground cutter bar 1 is positioned and placed in the ground cutter bar mounting groove 320, and the two clamping plate parts 32 are clamped and fixed to the ground cutter bar 1 through the fastening bolts 34.

In order to achieve avoidance and weight reduction, for each coupling 30 , a weight reduction escape hole 321 is respectively provided at the center of the splint portion 32 of each coupling 30 , and the weight reduction escape hole 321 is connected with the connection on the corresponding coupling 30 . Rod mounting slot 310 corresponds.

The coupling 30 can be made of castings during specific processing, and the structure thereon can be machined to facilitate manufacturing.

During assembly, the U-shaped bolts 33 and the couplings 30 can be fixed on the spindle connecting rods 2 on the corresponding sides first, and then the corresponding ground tool bar 1 can be inserted between the two splint parts 32, and the fastening bolts 34 can be tightened. The ground cutter bar 1 is clamped and fixed on the two couplings 30 to complete the assembly. The three ground cutter bars 1 can be driven by the spindle to rotate to realize the opening and closing operation.

During the adjustment process, if the opening and closing of the ground cutter bar 1 is not in place, you can loosen the fastening bolt 34 or the U-bolt 33. When the fastening bolt 34 is loosened, the position of the ground cutter bar 1 can be adjusted telescopically. The U-shaped bolt 33 can be rotated to adjust the assembly position of the interphase coupling device 3 and the corresponding spindle connecting rod 2, and then fixed, and can be adjusted repeatedly until the position required for use is met. During this adjustment period, the interphase coupling assembly can be Repeat the loosening adjustment.

In this embodiment, the interphase coupling device can be used to effectively realize stepless adjustment of the extension position and rotation position of the ground cutter bar. The adjustment is more convenient and can quickly and effectively meet the use requirements. The on-site installation positions are mainly concentrated at the three alternate-phase coupling devices, which facilitates the control of the entire installation accuracy and cumulative error, which can effectively improve the on-site installation efficiency and operational reliability, and facilitate product operation and maintenance throughout the life cycle.

Specific embodiment 2 of the grounding switch provided by the present invention:

The main difference between this embodiment and the first embodiment is that in the first embodiment, the connecting rod fixing member on the connecting plate portion is a U-bolt. In this embodiment, a clamp can be used as the connecting rod fixing member to fix and assemble the main shaft connecting rod on the corresponding side with the connecting plate portion on the corresponding coupling member.

Specific embodiment 3 of the grounding switch provided by the present invention:

The main difference between this embodiment and the first embodiment is that in the first embodiment, a detachable U-bolt is pre-configured on each coupling member to be used as a connecting rod fixing member. In this embodiment, only four screw mounting holes are provided on the connecting plate portion, and the screw mounting holes serve as a fixing member mounting structure, which can be used by the construction party to install the connecting rod fixing member on the connecting plate portion during on-site installation. The connecting rod fixing member can be selected by the construction party on-site in the form of a clamp or a U-bolt.

Specific embodiment 4 of the grounding switch provided by the present invention:

The main difference from Embodiment 1 is that in Embodiment 1, a connecting rod mounting groove is provided on the connecting plate part for placing the spindle connecting rod, and a floor knife bar mounting groove is provided on the splint part for positioning and placing the floor knife. Rod for easy assembly and adjustment. In this embodiment, the connecting rod installation groove and the ground knife rod installation groove are omitted, and the splint part and the connecting rod plate part are flat parts to ensure that the spindle connecting rod and the ground knife rod can be effectively clamped and fixed.

Specific embodiment 5 of the grounding switch provided by the present invention:

The main difference from Embodiment 1 is that in Embodiment 1, grooves are added to increase static friction, and set screws are used to fix and assemble the spindle connecting rod and the connecting plate together. In this embodiment, if the fastening effect can be ensured, the fastening assembly can also be ensured by only adding grooves or only providing set screws.

Specific embodiment 6 of the grounding switch provided by the present invention:

The main difference from Embodiment 1 is that in Embodiment 1, the notches of the two connecting rod mounting grooves on the two coupling parts are in opposite directions. In this embodiment, the notches of the two connecting rod mounting grooves on the two coupling parts are oriented in the same direction, so as to ensure that the main shaft connecting rods are coaxial.

Specific embodiment 7 of the grounding switch provided by the present invention:

The main difference between this embodiment and the first embodiment is that in the first embodiment, the U-bolt as the connecting rod fixing member is detachably mounted on the connecting plate portion. In this embodiment, the connecting rod fixing member adopts an arc-shaped buckle cover, one side of which is hinged on the connecting plate portion, and the other side can be detachably assembled with the connecting plate portion by means of a fastening bolt or a buckle structure, so that the arc-shaped buckle cover can be movably assembled on the connecting plate portion. After opening the arc-shaped buckle cover, the main shaft connecting rod can be adjusted, and after locking the main shaft connecting rod, the main shaft connecting rod can be fixedly assembled with the connecting plate portion.

The present invention provides an embodiment of the inter-phase coupling device of the grounding switch. The structure of the inter-phase coupling device in this embodiment is the same as the structure of the inter-phase coupling device in the above-mentioned grounding switch Embodiment 1, and will not be described again here.

Of course, in other embodiments, the interphase coupling device in any one of the grounding switch embodiments 2 to 7 can also be used, which will not be described again here.

Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still The technical solutions described in the foregoing embodiments can be modified without any creative effort, or some of the technical features can be equivalently replaced. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. An interphase coupling device for a grounding switch, comprising:

the two coupling pieces (30) are sequentially arranged along the left-right direction and are used for being matched with each other to clamp and fix the corresponding cutter bar (1) and are in transmission connection with the spindle connecting rods (2) at the two sides;

each coupling piece (30) is respectively provided with a connecting plate part (31), the connecting plate parts (31) extend along the left-right direction, each connecting plate part (31) is respectively detachably or movably provided with a connecting rod fixing piece or each connecting plate part (31) is respectively provided with a fixing piece mounting structure, and the fixing piece mounting structure is used for detachably or movably assembling the connecting rod fixing piece and is used for press-fitting and fixing the corresponding side main shaft connecting rod (2) on the corresponding connecting plate part (31) through the connecting rod fixing piece;

each coupling piece (30) is provided with a clamping plate part (32), the clamping plate parts (32) are vertically arranged with the connecting plate parts (31), and the two clamping plate parts (32) are oppositely arranged at intervals to form a clamping gap for inserting the corresponding cutter bar (1);

the bolt fastening structure applies opposite acting force to the two clamping plate parts (32) to force the two clamping plate parts (32) to clamp and fix the corresponding cutter bar (1).

2. An interphase coupling device for a grounding switch as claimed in claim 1, wherein,

connecting plate parts (31) of the coupling pieces (30) are respectively provided with connecting rod mounting grooves (310), the connecting rod mounting grooves (310) extend along the left-right direction, and one side of the connecting rod mounting grooves is of an opening structure for assembling corresponding side main shaft connecting rods (2) so that the corresponding side main shaft connecting rods (2) are pressed and fixed in the connecting rod mounting grooves (310) by the connecting rod fixing pieces;

ground cutter bar mounting grooves (320) are respectively formed in opposite inner sides of the clamping plate parts (32) of the coupling pieces (30) and are used for positioning and accommodating the ground cutter bars (1).

3. The interphase coupling device of a grounding switch according to claim 2, wherein the link mounting groove is a semicircular groove.

4. The interphase coupling device of the grounding switch according to claim 2, characterized in that the center of each clamping plate part (32) is respectively provided with a weight-reducing avoidance hole (321), and the weight-reducing avoidance holes (321) correspond to the connecting rod mounting grooves (310) on the corresponding coupling members (30).

5. The interphase coupling device of a grounding switch according to claim 2 or 3 or 4, characterized in that a plurality of grooves (311) are provided on the inner wall surface of the link mounting groove (310) for increasing the friction force of the link mounting groove (310) and the corresponding spindle link (2).

6. The interphase coupling device of a grounding switch according to claim 5, wherein the grooves (311) extend in the left-right direction and are distributed in sequence in the width direction of the link mounting groove (310).

7. An inter-phase coupling device for a grounding switch according to claim 2, 3 or 4, wherein the notches of the two link mounting grooves (310) on the two coupling members (30) are oppositely directed.

8. The interphase coupling device of a grounding switch according to claim 2, 3 or 4, characterized in that the grounding bar mounting grooves (320) on both coupling members (30) are open-ended through groove structures.

9. Interphase coupling device of a grounding switch according to any of claims 1 to 4, characterized in that each coupling piece (30) is detachably fitted with the link fixing piece, which is a hoop or a U-bolt (33).

10. A grounding switch, comprising:

the main shaft extends along the left-right direction in the axial direction and is used for being driven to rotate by the operating mechanism;

the three grounding knife bars (1) are sequentially and alternately fixed on the main shaft along the left-right direction, and are driven to rotate by the main shaft so as to control the opening and closing of the grounding switch;

the grounding switch is characterized in that the main shaft comprises four main shaft connecting rods (2) which are coaxially arranged, the four main shaft connecting rods (2) comprise two inter-phase connecting rods and two side-phase connecting rods, any two adjacent connecting rods in the four main shaft connecting rods (2) are respectively and fixedly assembled through inter-phase coupling devices (3), the four main shaft connecting rods (2) are fixedly assembled together through the three inter-phase coupling devices (3), each grounding cutter bar (1) is correspondingly and fixedly assembled on one inter-phase coupling device (3), and the inter-phase coupling devices (3) are structurally characterized in that the inter-phase coupling devices of the grounding switch are adopted.