CN213781856U - Neutral line overlapping conversion device and power supply conversion switch thereof - Google Patents

Abstract

The utility model discloses a neutral line overlapping conversion device and a power supply change-over switch thereof, which comprises a shell, a movable contact structure, an N-phase contact structure and a conducting ring structure, wherein the N-phase contact structure comprises a load wiring contact, an upper wiring contact and a lower wiring contact which are respectively connected with N lines of a load, a main power supply and a standby power supply, the conducting ring structure comprises a first conducting ring, a second conducting ring and a third conducting ring which are connected with the upper wiring contact, the lower wiring contact and the load wiring contact, two ends of the movable contact structure can be simultaneously connected with the first conducting ring, the second conducting ring and the third conducting ring, so that the N lines of the load, the main power supply and the standby power supply are simultaneously connected in series, the design has the advantages that the zero line can be prevented from flying, the traditional double-acting contact rotating structure can be avoided, the installation parts are greatly saved, and the installation structure is simplified, the whole installation steps are reduced, the assembly efficiency of the product is improved, and the production cost and the labor cost are reduced.

Description

Neutral line overlapping conversion device and power supply conversion switch thereof

Technical Field

The utility model relates to an automatic change over switch technical field, concretely relates to neutral line overlaps conversion equipment and power change over switch thereof.

Background

The ATSE (automatic Transfer Switching Equipment), namely an automatic Transfer Switching device, is applied to very important power distribution places, can detect whether a power supply can be automatically switched to a normal standby power supply when faults such as power failure, phase loss, overvoltage, undervoltage and the like occur, and guarantees continuity of power utilization, so that the ATSE (automatic Transfer Switching Equipment) is more and more widely applied to modern power distribution systems. The neutral line overlapping technology means that when ATSE is switched between a main power supply and a standby power supply, a neutral line (N pole) of two power supplies has an instantaneous overlapping closing process, so that the N pole of a load is always communicated with a grounding system.

Chinese patent document CN105261501B discloses a neutral line overlapping switching structure of a dual power transfer switch, which includes an insulating housing, an insulating mounting seat disposed on the insulating housing and engaged with a driving square shaft, a power supply moving contact a and a power supply moving contact B disposed on the insulating mounting seat, a load wiring board disposed on the insulating housing, a power supply wiring board a and a power supply wiring board B, and a contact pressure spring and a contact tension spring telescopically connected between the power supply moving contact a and the power supply moving contact B; the power supply moving contact A is arranged in a load arc-shaped groove of the insulating mounting seat in a sliding mode through a load pin shaft, and the power supply moving contact B is arranged in a common arc-shaped groove of the insulating mounting seat in a sliding mode through a common pin shaft. According to the attached drawings, the power supply moving contact A and the power supply moving contact B are designed to be Z-shaped structures, and rotation is achieved through the driving cooperation of the arc-shaped groove of the insulating mounting seat and the pin shaft respectively, namely when the power supply A is switched on, the insulating mounting seat rotates clockwise, the common pin shaft can be pushed against one end of the common arc-shaped groove, so that the power supply moving contact B is driven to rotate, the power supply moving contact B is disconnected from the load wiring board and the power supply wiring board B, the contact pressure spring and the tensile contact tension spring are squeezed to deform the contact pressure spring and the tensile contact tension spring, and when the power supply A is switched off, the contact pressure spring and the contact tension spring elastically reset, and the power supply moving contact B is electrically contacted with the load wiring board and the power supply wiring board B. Therefore, the power supply moving contact A and the power supply moving contact B are respectively provided with two independent transmission structures, and the two transmission structures realize the automatic reset function through the contact spring and the contact pressure spring.

Although the neutral line overlapping switching structure of the dual power supply changeover switch can realize the function of the neutral line overlapping function, the structure has the following problems in practical use:

the power supply moving contact is characterized in that the power supply moving contact A and the power supply moving contact B are fixed on an insulating mounting seat through two groups of pin shafts respectively, the pin shafts between the power supply moving contact A and the power supply moving contact B are correspondingly connected with a contact pressure spring and a contact tension spring, when the power supply moving contact A and the power supply moving contact B are assembled, installation parts are multiple, time and labor are wasted when the power supply moving contact B and the power supply moving contact B are installed, the installation efficiency is low, the power supply moving contact A and the power supply moving contact B are too complex in transmission structure, the production cost of products is high, and the market competitiveness is low.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the transmission mode complicacy of the A power moving contact, the B power moving contact of the central line overlapping conversion structure among the prior art, and installation spare part is many, and the installation is wasted time and energy, problem that manufacturing cost is high to it is few to provide an installation spare part, simple structure, simple to operate, low in production cost's neutral line overlapping conversion equipment.

The utility model provides a neutral line overlaps conversion equipment connects in power change over switch one side, include:

a housing in which a driving shaft is rotatably provided;

the movable contact structure is arranged in the through groove structure formed in the driving rotating shaft in a penetrating way, and two ends of the movable contact structure extend out of the peripheral side wall of the driving rotating shaft;

the N-phase contact structure comprises a load wiring contact connected to the output side of the shell, and an upper wiring contact and a lower wiring contact connected to the input side of the shell;

the conducting ring structure comprises a first conducting ring, a second conducting ring and a third conducting ring which are respectively connected with the upper wiring contact, the lower wiring contact and the load wiring contact, and the first conducting ring, the second conducting ring and the third conducting ring are arranged around the driving rotating shaft at intervals along the motion track of the moving contact structure; the movable contact structure is driven by the driving rotating shaft, two ends of the movable contact structure are provided with a first conduction state for rotationally connecting the third conducting ring and the first conducting ring, a second conduction state for rotationally connecting the third conducting ring and the second conducting ring, and the movable contact structure switched between the first conduction state and the second conduction state is provided with an overlapping state for simultaneously communicating the first conducting ring, the second conducting ring and the third conducting ring.

In the neutral line overlapping conversion apparatus, two ends of the third conductive ring are respectively disposed opposite to the first conductive ring and the second conductive ring and form a first arc-shaped gap and a second arc-shaped gap, and when the two ends of the movable contact structure rotate to pass through the first arc-shaped gap and the second arc-shaped gap, one end of the first conductive ring and one end of the third conductive ring are respectively connected, and the other end of the second conductive ring and the other end of the third conductive ring are connected.

In the neutral line overlap converting apparatus, the two ends of the moving contact structure are respectively provided with an arc-shaped clamping portion in clamping contact with the conductive ring structure.

In the neutral line overlap converting apparatus described above, the arc circumferential length of the arc-shaped clamping portion is larger than the arc circumferential lengths of the first arc-shaped gap and the second arc-shaped gap.

In the neutral line overlap converting apparatus, the first conducting ring and the second conducting ring are symmetrically disposed about an axis of the driving rotating shaft, and two ends of the third conducting ring are symmetrically disposed about the axis of the driving rotating shaft.

In the neutral line overlapping conversion device, the through groove structure comprises two through groove holes arranged in parallel on the driving rotating shaft, two ends of each through groove hole extend to penetrate through the peripheral side wall of the driving rotating shaft, the moving contact structure comprises two moving contact pieces oppositely arranged on the two through groove holes and two elastic pressing pieces respectively arranged between the two moving contact pieces and the two through groove holes, the two elastic pressing pieces apply opposite extrusion forces to the two moving contact pieces, the two moving contact pieces respectively extend out of the two ends of the through groove holes and are arc ends, and the arc clamping parts are formed in a pairwise opposite mode.

In the neutral line overlapping conversion device, a limit structure is arranged between the through slot hole and the movable contact piece, the limit structure comprises a triangular limit block arranged on the inner wall of the through slot hole and a triangular limit notch arranged on the movable contact piece corresponding to the triangular limit block, and the triangular limit block and the triangular limit notch are matched and clamped when the movable contact piece is inserted into the through slot hole.

The utility model also discloses a power change-over switch, overlap conversion equipment including above-mentioned neutral line, power change-over switch with the neutral line overlaps and is equipped with the operation main shaft between the conversion equipment, the operation main shaft is cup jointed each other by a plurality of drive pivots and is formed.

In the above power supply changeover switch, the drive rotating shafts include the protruding portions and the groove portions which are arranged at both ends in the axial direction thereof, and two adjacent drive rotating shafts are inserted into the groove portions through the protruding portions to form linkage fit.

In the power supply changeover switch, the protruding part comprises a circular boss protruding from one end of the driving rotating shaft, a plurality of driving lugs arranged on the peripheral side wall of the circular boss at intervals, and a polygonal groove arranged at the center of the circular boss; the groove part comprises a driving groove suitable for the matching insertion of the circular boss and the driving lug and a polygonal bulge corresponding to the polygonal groove and arranged at the central position of the driving groove.

Compared with the prior art, the technical scheme of the utility model have the following advantage:

1. the utility model provides a neutral line overlapping conversion device, load wiring contact links to each other with the N line of load, goes up wiring contact and main power supply's N line and links to each other, and lower wiring contact links to each other with stand-by power supply's N line, around the drive pivot around set up with respectively with go up wiring contact, lower wiring contact, load wiring contact continuous first conducting ring, second conducting ring and third conducting ring, because first conducting ring, second conducting ring and third conducting ring set up along the movement orbit of moving contact structure, the both ends of moving contact structure when first conducting state and second conducting state switch over, can put through first conducting ring, second conducting ring and third conducting ring simultaneously, make load, main power supply and stand-by power supply's N line establish ties together simultaneously to avoid appearing zero line soaring problem, improve the security when the product uses, the design has the advantages that switching can be realized in three states of 'connection of a main power supply and a load N pole, overlapping of a neutral line and connection of a standby power supply and the load N pole' only by rotating the driving rotating shaft, the use of a traditional double-acting contact rotating structure is avoided, the original spring resetting structure is not required to be considered, the installation parts are greatly saved, the installation structure is simplified, the whole installation steps are reduced, the assembly efficiency of a product is improved, and the production cost and the labor cost are reduced.

2. The utility model provides a neutral line overlaps conversion equipment move the contact structure and switch over first on-state and second on-state, one of which the arc clamping part can rotate the process first arc clearance and centre gripping simultaneously first conducting ring with third conducting ring, another the arc clamping part can rotate the process second arc clearance and centre gripping simultaneously the second conducting ring with third conducting ring to make first conducting ring, second conducting ring and third conducting ring switch on simultaneously, realize the neutral line and overlap the function.

3. The utility model provides a neutral line overlaps conversion equipment, the circular arc girth of arc clamping part is greater than first arc clearance with the circular arc girth of second arc clearance makes the both ends of movable contact structure rotate the process first arc clearance with can contact with first, two, three conducting rings simultaneously during the second arc clearance, realize the neutral line and overlap the function.

4. The utility model provides a neutral line overlaps conversion equipment, through the structure setting of axle center symmetry, makes the arc clamping part is in first conducting ring or the second conducting ring or the rotation distance of third conducting ring is the same, thereby reduces the rotation range of drive pivot for rotate the switching process, on the basis that the zero line soared can not take place guaranteeing, reduce the overlap time of neutral line, the security when improving the product and using.

5. The utility model provides a neutral line overlaps conversion equipment be equipped with the triangle-shaped stopper on leading to the slot hole inner wall be equipped with the spacing breach of triangle-shaped on the movable contact spring, the triangle-shaped stopper with the spacing breach of triangle-shaped is in the movable contact spring inserts cooperation joint during the logical slot hole prevents the movable contact spring along the extending direction of leading to the slot hole takes place the back-and-forth movement, makes simultaneously the movable contact spring can fix a position fast when the installation, improves the installation effectiveness, ensures that two movable contact springs stretch out the installation distance of leading to the slot hole is the same, thereby guarantees two the rotation orbit of circular arc end is the same, can both with conducting ring structural joint.

6. The utility model provides a pair of power change-over switch sets up as above neutral conductor overlap conversion equipment, it naturally has because of setting up above-mentioned neutral conductor and overlapping all advantages that conversion equipment brought, is by a plurality of according to the operation main shaft the drive pivot cup joints and forms, when the operation main shaft rotates, can drive power change-over switch switches over between main power source combined floodgate or stand-by power supply combined floodgate, drives simultaneously neutral conductor overlaps conversion equipment and switches over between first on-state and second on-state to realize A, B, C, N four phases of load and can switch over between A, B, C, N four phases of main power source or stand-by power supply in step, and the neutral conductor that load, main power source and stand-by power supply's N looks have joint simultaneously in the switching process overlaps the state.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of the contact end of the neutral line overlap switching device provided by the present invention in a standby power supply zero line conduction state;

fig. 2 is a front view of the contact end of the neutral line overlapping switching device provided by the present invention in a central line overlapping state;

fig. 3 is a front view of the contact end of the neutral line overlap switching device provided by the present invention in the main power zero line conducting state;

FIG. 4 is a top view of the neutral overlap transition device of FIG. 2 with the housing hidden;

FIG. 5 is a schematic view of the neutral overlap transition device shown in FIG. 4 with the drive shaft hidden;

FIG. 6 is a schematic structural view of the drive shaft and moving contact assembly shown in FIG. 1;

FIG. 7 is a schematic structural view of the driving shaft shown in FIG. 1;

fig. 8 is a schematic structural diagram of a power transfer switch provided by the present invention;

description of reference numerals:

1-a shell; 11-driving the rotating shaft; 12-a boss; 13-groove section; 14-circular boss; 15-driving the bumps; 16-polygonal grooves; 17-a drive recess; 18-polygonal protrusions;

2-moving contact structure; 21-an arc-shaped clamping part; 22-moving contact piece; 23-elastic tabletting; 24-triangular limit notches;

3-a through groove structure; 31-through slot holes; 32-triangular stopper;

4-N phase contact structure; 41-load patch contacts; 42-upper wiring contacts; 43-lower wiring contact;

5-a conductive ring structure; 51-a first conductive ring; 52-a second conductive ring; 53-a third conductive ring; 54-a first arcuate gap; 55-a second arcuate gap;

6-power transfer switch; 61-operate the spindle.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "load," "common," "standby" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment is described in detail below with reference to the accompanying drawings:

the utility model provides a neutral line overlaps conversion equipment as shown in fig. 1-7, connects in power change over switch 6 one side, include:

a shell 1, wherein a driving rotating shaft 11 is rotatably arranged in the shell;

the moving contact structure 2 is arranged in the through groove structure 3 formed in the driving rotating shaft 11 in a penetrating mode, and two ends of the moving contact structure extend out of the peripheral side wall of the driving rotating shaft 11;

an N-phase contact structure 4 including a load wiring contact 41 connected to an output side of the housing 1, and an upper wiring contact 42 and a lower wiring contact 43 connected to an input side of the housing 1;

the conductive ring structure 5 comprises a first conductive ring 51, a second conductive ring 52 and a third conductive ring 53 which are respectively connected with the upper wiring contact 42, the lower wiring contact 43 and the load wiring contact 41, and the first conductive ring 51, the second conductive ring 52 and the third conductive ring 53 are arranged around the driving rotating shaft 11 at intervals along the motion track of the movable contact structure 2; the two ends of the moving contact structure 2 driven by the driving shaft 11 have a first conducting state for rotatably connecting the third conducting ring 53 and the first conducting ring 51, a second conducting state for rotatably connecting the third conducting ring 53 and the second conducting ring 52, and the moving contact structure 2 switched between the first conducting state and the second conducting state has an overlapping state for simultaneously connecting the first conducting ring 51, the second conducting ring 52 and the third conducting ring 53.

The above-mentioned embodiment is a core technical solution of this embodiment, the load wiring contact 41 is connected to N lines of a load, the upper wiring contact 42 is connected to N lines of a main power supply, the lower wiring contact 43 is connected to N lines of a standby power supply, the first conductive ring 51, the second conductive ring 52 and the third conductive ring 53 which are respectively connected to the upper wiring contact 42, the lower wiring contact 43 and the load wiring contact 41 are arranged around the driving rotating shaft 11, because the first conductive ring 51, the second conductive ring 52 and the third conductive ring 53 are arranged along the movement track of the moving contact structure 2, when the two ends of the moving contact structure 2 are switched between the first conduction state and the second conduction state, the first conductive ring 51, the second conductive ring 52 and the third conductive ring 53 are simultaneously connected, so that the N lines of the load, the main power supply and the standby power supply are simultaneously connected in series, thereby avoiding the null line vacation problem, the safety of the product during use is improved, the advantage of design like this lies in, only need rotate drive pivot 11 just can realize switching over in these three states of "main power source and load N utmost point switch-on-neutral line overlap-stand-by power source and load N utmost point switch-on", avoids using traditional double movable contact rotating-structure, also need not to consider original spring reset structure simultaneously, has saved installation spare part greatly, has simplified mounting structure, makes holistic installation step reduce, has improved the packaging efficiency of product, reduction in production cost and cost of labor.

As a specific structure, two ends of the third conductive ring 53 are respectively disposed opposite to the first conductive ring 51 and the second conductive ring 52, and a first arc-shaped gap 54 and a second arc-shaped gap 55 are formed, as shown in fig. 5, two ends of the movable contact structure 2 are respectively provided with an arc-shaped clamping portion 21 in clamping contact with the conductive ring structure 5, the arc-shaped clamping portion 21 at one end is rotationally switched among the first conductive ring 51, the first arc-shaped gap 54 and the third conductive ring 53, the arc-shaped clamping portion 21 at the other end is rotationally switched among the third conductive ring 53, the second arc-shaped gap 55 and the second conductive ring 52, so that the two arc-shaped clamping portions 21 can be kept in close contact with the conductive ring structure 5 during rotation, and the movable contact structure 2 is switched between a first conduction state and a second conduction state, one of the arc-shaped clamping portions 21 rotates to pass through the first arc-shaped gap 54 and simultaneously clamp the first conductive ring 51 and the third conductive ring 53, and the other arc-shaped clamping portion 21 rotates to pass through the second arc-shaped gap 55 and simultaneously clamp the second conductive ring 52 and the third conductive ring 53, so that the first conductive ring 51, the second conductive ring 52 and the third conductive ring 53 are simultaneously connected to realize the neutral line overlapping function, and further, the arc circumference of the arc-shaped clamping portion 21 is larger than the arc circumferences of the first arc-shaped gap 54 and the second arc-shaped gap 55, so as to ensure that the two arc-shaped clamping portions 21 at the two ends of the movable contact structure 2 can simultaneously clamp and contact the first conductive ring 51, the second conductive ring 52 and the third conductive ring 53 when passing through the first arc-shaped gap 54 and the second arc-shaped gap 55, and the arc circumference of the arc-shaped clamping portion 21 is longer, the longer the neutral line overlap time of the three will be.

As a specific structural arrangement, the first conductive ring 51 and the second conductive ring 52 are symmetrically arranged about the axis of the driving rotating shaft 11, two ends of the third conductive ring 53 are symmetrically arranged about the axis of the driving rotating shaft 11, and the arc-shaped clamping portion 21 has the same rotating distance in the first conductive ring 51, the second conductive ring 52 or the third conductive ring 53 through the axial symmetrical structural arrangement, so that the rotating amplitude of the driving rotating shaft 11 is reduced, the rotating switching process is accelerated, the overlapping time of neutral lines is reduced on the basis of ensuring that zero line emptying cannot occur, and the safety of products in use is improved.

The specific arrangement of the moving contact structure 2 and the through-slot structure 3 will be described in detail with reference to fig. 4-7:

the through groove structure 3 comprises two through groove holes 31 arranged in parallel on the driving rotating shaft 11, two ends of each through groove hole 31 extend to penetrate through the peripheral side wall of the driving rotating shaft 11, the movable contact structure 2 comprises two movable contact pieces 22 arranged on the two through groove holes 31 in an opposite mode, and two elastic pressing pieces 23 respectively arranged between the two movable contact pieces 22 and the two through groove holes 31, the two elastic pressing pieces 23 apply pressing forces which are close to each other to the two movable contact pieces 22, the movable contact pieces 22 are designed to be reliably arranged in the through groove holes 31 under the action of the elastic pressing pieces 23, two ends, extending out of the two through groove holes 31, of the two movable contact pieces 22 are arc ends, the arc clamping parts 21 are formed in a pairwise opposite mode, the arc clamping parts 21 are in close contact with the conducting ring structure 5 under the action of the elastic pressing pieces 23, and the movable contact pieces 22, simple structure, easy processing and assembly, low production cost and suitability for mass production.

As a specific structure, a limiting structure is arranged between the through-slot hole 31 and the movable contact piece 22, the limiting structure includes a triangular limiting block 32 arranged on the inner wall of the through-slot hole 31, and a triangular limiting notch 24 arranged on the movable contact piece 22 corresponding to the triangular limiting block 32, the triangular limiting block 32 and the triangular limiting notch 24 are in fit clamping connection when the movable contact piece 22 is inserted into the through-slot hole 31, so that the movable contact piece 22 is prevented from moving back and forth along the extending direction of the through-slot hole 31, meanwhile, the movable contact piece 22 can be quickly positioned when being installed, the installation efficiency is improved, the same installation distance of the two movable contact pieces 22 extending out of the through-slot hole 31 is ensured, and therefore, the same rotation track of the two arc ends is ensured, and the two arc ends can be both connected with the conducting ring structure 5.

Example 2

The present embodiment provides a power transfer switch as shown in fig. 6-8, which includes the neutral line overlap switching device of embodiment 1, the power transfer switch of this embodiment naturally has all the advantages brought by the provision of the neutral line overlap switching device by providing the neutral line overlap switching device as described above, an operation spindle 61 is provided between the power transfer switch 6 and the neutral line overlap switching device, the operation spindle 61 is formed by mutually sleeving a plurality of driving spindles 11, when the operation spindle 61 rotates, the power transfer switch 6 is driven to switch between the main power switch-on state and the standby power switch-on state, and the neutral line overlap switching device is driven to switch between the first conducting state and the second conducting state, so that A, B, C, N four phases of the load can be switched between a, b, c, d, B. c, N the phases are switched synchronously and the N phases of the load, main power supply and backup power supply have simultaneous engaged neutral overlap conditions during the switching process.

As a specific structural arrangement, the driving rotating shaft 11 comprises a protruding portion 12 and a groove portion 13 which are arranged at two axial ends of the driving rotating shaft, two adjacent driving rotating shafts 11 are inserted into the groove portion 13 through the protruding portion 12 to form linkage fit, the structure is simple, the transmission fit is safe and reliable, and the driving rotating shaft is further arranged, wherein the protruding portion 12 comprises a circular boss 14 protruding from one end of the driving rotating shaft 11, a plurality of driving protrusions 15 arranged on the peripheral side wall of the circular boss 14 at intervals, and a polygonal groove 16 arranged at the center of the circular boss 14; the groove 13 includes a driving groove 17 adapted to the circular boss 14 and the driving protrusion 15 to be inserted in a matching manner, and a polygonal protrusion 18 disposed at a central position of the driving groove 17 corresponding to the polygonal groove 16, when the protruding portion 12 is inserted into the groove 13, the circular boss 14 and the driving protrusion 15 are inserted into the driving groove 17, and the polygonal protrusion 18 is also inserted into the polygonal groove 16, so that when two driving shafts 11 are connected to each other to rotate, a torque force is transmitted by the cooperation of two sets of the insertion blocks and the grooves, the transmission effect is good, the driving protrusion 15, the driving groove 17, the polygonal protrusion 18, and the polygonal groove 16 are disposed in a central symmetry manner with respect to the axis of the driving shaft 11, in this embodiment, four driving protrusions 15 are provided, the circular boss 14 is divided into four equal parts along the circumference of the circular boss, and the polygonal convex block and the polygonal groove 16 are in a rectangular structure, so that the convex part 12 can be inserted into the groove part 13 by rotating the convex part by no more than 90 degrees no matter what angle the convex part is inserted into, and the groove part is inserted into the groove part to form inserting fit with the groove part, and the installation speed is improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (10)

1.A neutral overlap switching device connected to a power transfer switch (6) side, comprising:

a shell (1) in which a driving rotating shaft (11) is rotatably arranged;

the movable contact structure (2) is arranged in the through groove structure (3) formed in the driving rotating shaft (11) in a penetrating mode, and two ends of the movable contact structure extend out of the peripheral side wall of the driving rotating shaft (11);

an N-phase contact structure (4) including a load wiring contact (41) connected to an output side of the housing (1), and an upper wiring contact (42) and a lower wiring contact (43) connected to an input side of the housing (1);

the conductive ring structure (5) comprises a first conductive ring (51), a second conductive ring (52) and a third conductive ring (53) which are respectively connected with the upper wiring contact (42), the lower wiring contact (43) and the load wiring contact (41), and the first conductive ring (51), the second conductive ring (52) and the third conductive ring (53) are arranged around the driving rotating shaft (11) at intervals along the motion track of the movable contact structure (2); the two ends of the movable contact structure (2) are driven by the driving rotating shaft (11) to have a first conduction state for rotatably connecting the third conducting ring (53) and the first conducting ring (51), a second conduction state for rotatably connecting the third conducting ring (53) and the second conducting ring (52), and the movable contact structure (2) switched between the first conduction state and the second conduction state has an overlapping state for simultaneously connecting the first conducting ring (51), the second conducting ring (52) and the third conducting ring (53).

2. The neutral overlap switching apparatus according to claim 1, wherein both ends of said third conductive ring (53) are disposed opposite to said first conductive ring (51) and said second conductive ring (52), respectively, and are formed with a first arc-shaped gap (54) and a second arc-shaped gap (55), and both ends of said movable contact structure (2) are connected to one ends of said first conductive ring (51) and said third conductive ring (53), respectively, and to the other ends of said second conductive ring (52) and said third conductive ring (53), respectively, when rotated through said first arc-shaped gap (54) and said second arc-shaped gap (55).

3. The neutral line overlap transition device according to claim 2, wherein both ends of said movable contact structure (2) are respectively provided with arc-shaped holding portions (21) which are held in contact with said conductive ring structure (5).

4. The neutral overlap transition device of claim 3, wherein a circular arc circumference of said arc-shaped holding portion (21) is larger than a circular arc circumference of said first arc-shaped gap (54) and said second arc-shaped gap (55).

5. The neutral overlap converting apparatus according to claim 4, wherein said first conductive ring (51) and said second conductive ring (52) are symmetrically disposed about an axial center of said driving shaft (11), and both ends of said third conductive ring (53) are symmetrically disposed about an axial center of said driving shaft (11).

6. The neutral line overlapping conversion device according to claim 5, wherein the through groove structure (3) comprises two through groove holes (31) arranged on the driving rotating shaft (11) in parallel, two ends of each through groove hole (31) extend through the peripheral side wall of the driving rotating shaft (11), the movable contact structure (2) comprises two movable contact pieces (22) oppositely arranged on the two through groove holes (31), and two elastic pressing pieces (23) respectively arranged between the two movable contact pieces (22) and the two through groove holes (31), the two elastic pressing pieces (23) apply oppositely close pressing forces to the two movable contact pieces (22), two ends of each movable contact piece (22) extending out of the two through groove holes (31) are arc ends, and the arc-shaped clamping parts (21) are formed in a pairwise opposite mode.

7. The neutral line overlapping conversion device according to claim 6, characterized in that a limiting structure is arranged between the through-slot hole (31) and the movable contact piece (22), the limiting structure comprises a triangular limiting block (32) arranged on the inner wall of the through-slot hole (31) and a triangular limiting notch (24) arranged on the movable contact piece (22) corresponding to the triangular limiting block (32), and the triangular limiting block (32) and the triangular limiting notch (24) are matched and clamped when the movable contact piece (22) is inserted into the through-slot hole (31).

8. A power supply change-over switch is characterized by comprising a neutral line overlapping change-over device according to any one of claims 1 to 7, wherein an operation main shaft (61) is arranged between the power supply change-over switch (6) and the neutral line overlapping change-over device, and the operation main shaft (61) is formed by mutually sleeving a plurality of driving rotating shafts (11).

9. The power supply changeover switch according to claim 8, wherein the drive rotating shafts (11) comprise a protruding portion (12) and a recessed portion (13) which are arranged at both axial ends of the drive rotating shafts, and two adjacent drive rotating shafts (11) are inserted into the recessed portion (13) through the protruding portions (12) to form linkage fit.

10. The power supply changeover switch according to claim 9, wherein the projection (12) comprises a circular boss (14) projected from one end of the drive shaft (11), a plurality of drive projections (15) provided at intervals on an outer peripheral side wall of the circular boss (14), and a polygonal groove (16) provided at a central position of the circular boss (14); the groove part (13) comprises a driving groove (17) suitable for the matching insertion of the circular boss (14) and the driving lug (15), and a polygonal bulge (18) corresponding to the polygonal groove (16) and arranged at the center of the driving groove (17).

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