CN211428080U - Rotating cantilever arranged on main shaft and dual-power transfer switch using same - Google Patents

Abstract

The utility model provides a set up at epaxial rotation cantilever and use its dual power change over switch, belongs to low-voltage apparatus technical field, including last cantilever and lower cantilever, it has with main shaft complex last circular arc profile surface and the connecting portion of external connection to go up the cantilever, the cantilever has down the circular arc profile surface with main shaft complex and the link of external connection down, go up cantilever and lower cantilever fixed connection back, the last circular arc profile surface of going up the cantilever and the lower circular arc profile surface concatenation of lower cantilever are with the main shaft envelope for the rotation cantilever can rotate the main shaft relatively. The utility model also discloses an use this two power transfer switch that rotates the cantilever. The advantages are that: the rotating cantilever has good stability, the main shaft is evenly stressed, and the main shaft is convenient to process and install.

Description

Rotating cantilever arranged on main shaft and dual-power transfer switch using same

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, concretely relates to setting is rotating the epaxial rotation cantilever of main shaft and using this rotation cantilever's dual power change over switch.

Background

The switching device generally comprises an operating mechanism and a contact assembly, wherein the output of the operating mechanism drives a rotating main shaft, and the main shaft drives the contact assembly to be switched on and off through a connecting rod. In particular power distribution applications, such as dual power transfer switches with overlapping neutral conductors, in which the neutral conductor has an overlap time with the neutral conductor of the UPS during the switching process, the neutral contact assembly is structurally different from the phase contact assembly, and the drive assembly of the neutral contact assembly includes a rotating arm and a neutral drive arm, wherein the rotating arm is rotatable relative to the main shaft, and the neutral drive arm is fixed to the main shaft and rotates with the main shaft. The existing assembly method of the main shaft is that a round hole is formed in a rotating cantilever, the rotating cantilever is sleeved on the main shaft through the round hole, relative rotation of the rotating cantilever and the main shaft is achieved, the rotating cantilever is sleeved on the main shaft, then a neutral pole driving arm and the main shaft are welded and fixed, and finally surface treatment is conducted on the main shaft, such as galvanization and corrosion prevention. The assembly and treatment processes have the following defects: because the rotating cantilever is already sleeved on the main shaft before the surface treatment is carried out on the main shaft, the surface of the main shaft matched with the round hole on the rotating cantilever can not be subjected to the surface treatment, and the driving performance of the main shaft and even the operating mechanism is adversely affected. Or firstly carrying out surface treatment on the main shaft, then sleeving the rotating cantilever on the main shaft, and then welding and fixing the neutral pole driving arm and the main shaft, although the problem that the surface of the main shaft matched with the round hole on the rotating cantilever cannot be subjected to surface treatment can be avoided, the surface treatment needs to be carried out on the welding part, and the process procedure is increased.

In view of the above, there is a need for a reasonable improvement of the existing rotating cantilever on the main shaft. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a first task is to provide a rotation cantilever of setting on main shaft, and it is convenient for accomplish the installation behind surface treatment at the main shaft, makes main shaft surface treatment simple, has reduced the parts machining manufacturing process.

The utility model discloses an another task is to provide an use this two power transfer switch who rotates the cantilever, its performance that can improve the switch just ensures aforementioned rotation cantilever the comprehensive embodiment of technological effect.

In order to accomplish the task of priority, the utility model provides a technical scheme is: a rotary cantilever arranged on a main shaft is characterized in that: including last cantilever and lower cantilever, it has with main shaft complex go up circular arc profile surface and the connecting portion of external connection to go up the cantilever, down the cantilever have with main shaft complex lower circular arc profile surface and the link of external connection, go up cantilever and lower cantilever fixed connection back, the last circular arc profile surface of going up the cantilever and the lower circular arc profile surface concatenation of lower cantilever are with the main shaft envelope for it can rotate the main shaft relatively to rotate the cantilever.

In a specific embodiment of the present invention, the lower cantilever includes a first lower cantilever and a second lower cantilever, the first lower cantilever is a pair of lower cantilevers and is respectively disposed on two sides of the first upper cantilever and the second lower cantilever, a first lower circular arc profile is formed on a first end surface of each first lower cantilever in the first pair of lower cantilevers facing the main shaft, a pair of connecting arms is formed by extending the two sides of the first lower circular arc profile in the upward direction of the first lower cantilever, so that the upper end of the first lower cantilever is U-shaped, the first lower circular arc profile comprises the lower circular arc profile of the lower cantilever, the pair of connecting arms of the first lower cantilever is fixed to the upper cantilever, and the first lower cantilever is fixed to the second lower cantilever, the lower circular arc profile of the lower cantilever and the upper circular arc profile of the upper cantilever envelop the main shaft.

The utility model discloses a first, lower cantilever include lower cantilever one, lower cantilever two, the extension constitutes to have a pair of linking arm on the face of face to the cantilever of lower cantilever one, the constitution has lower circular arc profile face two on the face of main shaft of lower cantilever two, lower circular arc profile face two constitutes lower circular arc profile face, a pair of linking arm and the upper cantilever of lower cantilever one are fixed, and lower cantilever one is fixed with lower cantilever two, realizes upper cantilever and the joint of lower cantilever two, the lower circular arc profile face of lower cantilever and the upper circular arc profile face of upper cantilever envelop the main shaft.

In another specific embodiment of the present invention, a first lower circular arc profile is formed on a first end surface of the first lower cantilever facing the main shaft, and the pair of connecting arms are formed on both sides of the first lower circular arc profile, so that the first lower cantilever and the first upper cantilever are connected to form a U shape, and the first lower circular arc profile and the second lower circular arc profile form the second lower circular arc profile of the second lower cantilever side by side.

In another specific embodiment of the present invention, the lower cantilever is a pair and is disposed on two sides of the upper cantilever and the lower cantilever respectively.

In another specific embodiment of the present invention, the lower cantilever is a second lower cantilever, the second lower cantilever extends to form a connecting arm fixed to the upper cantilever, a second lower circular arc contour is formed on a end surface of the second lower cantilever facing the main shaft, the second lower circular arc contour forms a second lower circular arc contour, and the second lower circular arc contour and the second upper circular arc contour form a complete circle enveloping the main shaft.

In yet another specific embodiment of the present invention, the second lower cantilever is a pair and is respectively disposed on two sides of the second upper cantilever.

The utility model discloses a more and a concrete embodiment, lower circular arc profile on be provided with the axle sleeve, go up circular arc profile and axle sleeve concatenation with the main shaft envelope, realize the indirect envelope of main shaft of the last circular arc profile of upper boom and the lower circular arc profile concatenation of lower cantilever for the cantilever that rotates can be relative the main shaft and rotate.

In order to accomplish another task, the utility model provides a technical scheme is: a dual-power transfer switch comprises a first switch, a second switch and a linkage piece, wherein the first switch is used for connecting a first power supply and a load, the second switch is used for connecting a second power supply and the load, the linkage piece is used for realizing linkage between the first switch and the second switch, the first switch comprises a first operating mechanism, a first neutral pole contact assembly for correspondingly controlling the connection or disconnection of a neutral pole of the first power supply, a first main shaft driven to rotate by the output of the first operating mechanism, and a first neutral pole driving piece arranged on the first main shaft and used for driving the first neutral pole contact assembly to act; the second switch comprises a second operating mechanism, a second neutral pole contact assembly for correspondingly controlling the connection or disconnection of the neutral pole of the second power supply, a second main shaft driven to rotate by the output of the second operating mechanism, and a second neutral pole driving piece arranged on the second main shaft and used for driving the second neutral pole contact assembly to act; through between the first neutral pole driving piece of first switch and the second neutral pole driving piece of second switch the linkage of link spare, in dual power transfer switch conversion process, realize that the first neutral pole contact subassembly of first switch and the second neutral pole contact subassembly of second switch appear short overlapping switch-on, characteristics: the first neutral pole driving part comprises the rotating cantilever, namely a first rotating cantilever, and further comprises a first contact connecting rod, a first neutral pole driving arm and a first spring, wherein one end of the first contact connecting rod is hinged to a connecting end of a lower cantilever of the first rotating cantilever, the other end of the first contact connecting rod is hinged to a first neutral pole moving contact of the first neutral pole contact assembly, the first neutral pole driving arm is fixedly connected with the first main shaft, and the first spring; the second neutral drive comprises the rotating jib described above, i.e. the second rotating jib, the second neutral pole driving piece also comprises a second contact connecting rod, a second neutral pole driving arm and a second spring, wherein one end of the second contact connecting rod is hinged with the connecting end of the lower cantilever of the second rotating cantilever, the other end of the second contact connecting rod is hinged with a second neutral pole moving contact of the second neutral pole contact component, the second neutral pole driving arm is fixedly connected with the second main shaft, and the second spring is fixedly connected with the second main shaft, when the second neutral pole contact assembly of the second switch is closed, the second main shaft rotates to drive the second neutral pole driving arm to rotate along with the second neutral pole driving arm, the second neutral pole driving arm pushes and presses the second rotating cantilever, so that the hinge point of the second rotating cantilever and the second contact connecting rod crosses over the dead point position, the second neutral pole contact assembly is switched on, wherein, the connecting end of the lower cantilever of the first rotating cantilever is connected with the connecting part of the upper cantilever of the second rotating cantilever through the linkage part.

In yet another specific embodiment of the present invention, a first position-limiting member is disposed between the first rotating cantilever and the first contact link, the first position-limiting member includes a first inclined profile disposed at one end of the first rotating cantilever hinged to the first contact link and a first planar profile disposed at one end of the first contact link hinged to the first rotating cantilever, when the first neutral contact assembly is located at the closed position, the first inclined profile and the first planar profile cooperate with each other to lock the first neutral contact assembly at the on-position; and when the second neutral pole contact assembly is located at a closed position, the second inclined plane profile and the second plane profile are matched with each other to lock the second neutral pole contact assembly at a switching-on position.

In yet another specific embodiment of the present invention, the first neutral driving arm includes a pair of first neutral fixed driving arms and a first striking rod, the pair of first neutral fixed driving arms are disposed in parallel at two sides of the first rotating cantilever, one end of the pair of first neutral fixed driving arms is fixed to the first spindle, the other end of the pair of first neutral fixed driving arms is mounted with the first striking rod, and the first striking rod cooperates with the first rotating cantilever; the second neutral pole driving arms comprise a pair of second neutral pole fixed driving arms and a second striking rod, the second neutral pole fixed driving arms are arranged on two sides of the second rotating cantilever in parallel, one end of each second neutral pole fixed driving arm is fixed with the second spindle, the second striking rod is mounted at the other end of each second neutral pole fixed driving arm, and the second striking rods and the second rotating cantilever are in matched action.

In a further specific embodiment of the present invention, the first neutral driving arm may further comprise a single first neutral fixed driving arm and a first striking rod, the first striking rod being mounted at an end of the first neutral fixed driving arm; the second neutral pole driving arm can also be composed of a single second neutral pole fixed driving arm and a second striking rod, and the second striking rod is arranged at the end part of the second neutral pole driving arm.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has is: the rotating cantilever is divided into an upper cantilever and a lower cantilever, and the installation after the surface treatment of the main shaft is convenient, so that the surface treatment of each main shaft is simple; secondly, the lower cantilever is formed by overlapping a plurality of pieces, the total thickness of the lower cantilever is larger than that of the upper cantilever, so that the rotary cantilever has enough strength to ensure the driving force of the rotary cantilever to the neutral pole contact assembly, and when the rotary cantilever rotates around the main shaft, the main shaft is uniformly stressed, the stability of the rotary cantilever is good, and the structure ensures the strength of the rotary cantilever and simplifies the processing technology of the rotary cantilever; thirdly, if the lower cantilever is further composed of sheets made of different materials, the lower cantilever has the advantages of good wear resistance and mechanical strength.

Drawings

Fig. 1 is the internal structure schematic diagram of the dual power transfer switch of the present invention.

Fig. 2 is the utility model discloses in demolish the internal structure schematic diagram of dual power transfer switch behind half base.

Fig. 3a is an assembly schematic diagram of the first main shaft of the dual power transfer switch and the upper part thereof according to the present invention.

Fig. 3b is a front view of the first main shaft and its upper part of the dual power transfer switch of the present invention.

Fig. 4a is a schematic diagram of a first rotating cantilever structure of the dual power transfer switch of the present invention.

Fig. 4b is the second rotating cantilever structure diagram of the dual power transfer switch of the present invention.

Fig. 5a is an exploded view of the first neutral driving member according to the present invention.

Fig. 5b is an exploded view of the second neutral drive of the present invention.

Fig. 6a is an assembly diagram of the first neutral driving member according to the present invention.

Fig. 6b is an assembly diagram of the second neutral driving member according to the present invention.

Fig. 7 is an exploded view of the first rotating arm, the linkage member and the second rotating arm according to the present invention.

Fig. 8 is an assembly schematic diagram of the first rotating cantilever, the linkage member and the second rotating cantilever according to the present invention.

Fig. 9 is dual supply change-over switch neutral pole overlaps, first switch separating brake, and first looks utmost point contact assembly reachs the separating brake position, and first neutral pole contact assembly still closes a floodgate, and the second switch begins to move, and second neutral pole contact assembly closes a floodgate, but the second rotates the cantilever and does not cross the dead point line schematic diagram.

Fig. 10 is the dual power transfer switch neutral pole overlaps, and the second rotates the cantilever and just crosses the dead point line, and the second rotates the cantilever and drives the motion of linkage piece, and the linkage piece drives the motion of first rotation cantilever, but the dead point is not crossed to first rotation cantilever, the schematic diagram when not unblock promptly.

Figure 11 is dual supply change-over switch neutral pole overlaps, and the neutral pole contact subassembly of second reachs the switching-on position, and the dead point line back auto-lock is crossed to the second rotation cantilever, and the second rotates the cantilever and drives linkage motion, and linkage drives first rotation cantilever motion, crosses the dead point, and first rotation cantilever unblock, schematic diagram when first spring acted on.

Figure 12 is dual supply change over switch neutral pole overlaps and finishes, and the second neutral pole contact subassembly reachs the closing position, and the second rotates the cantilever and crosses dead point line back auto-lock, and after the unblock of first rotation cantilever, under first spring action power, first neutral pole moving contact reachs and divides the floodgate position.

Fig. 13a is a schematic view of a first neutral drive arm according to another embodiment of the present invention.

Fig. 13b is a schematic view of a second neutral drive arm according to another embodiment of the present invention.

In the figure: 1. the first switch, 10, a first operating mechanism, 11, a first main shaft, 12, a first phase pole driving piece, 121, a first phase pole upper connecting rod, 122, a first phase pole lower connecting rod; 13. a first neutral pole driver, 131, a first rotating cantilever, 1310, a first ramp profile, 1311, a first upper cantilever, 13111, a first upper circular hole, 13112, a first upper circular arc profile, 1312, a first lower cantilever, 13121, a first lower circular arc profile, 13122, a first connecting arm, 1313, a first lower cantilever, 13131, a first lower circular hole, 13132, a first lower circular arc profile, 1314, a first screw, 1315, a first spring washer and nut assembly, 1316, a first rivet, 1317, a first bearing surface, 132, a first contact link, 1321, a first planar profile, 133, a first neutral pole drive arm, 1331, a first neutral pole fixed drive arm, 11, a first striker rod mounting hole, 13312, a first spring cantilever arm hole, 1332, a first striker rod, 134, a first spring; 14. the phase-to-phase converter comprises a first phase pole contact assembly, 141, a first phase pole moving contact, 142 and a first phase pole fixed contact; 15. the first neutral pole contact assembly, 151, the first neutral pole moving contact, 152, the first neutral pole fixed contact;

2. a second switch, 20, a second operating mechanism, 21, a second main shaft, 22, a second phase pole driving piece, 221, a second phase pole upper connecting rod, 222, a second phase pole lower connecting rod; 23. a second neutral pole driver 231, a second rotating cantilever, 2310, a second ramp profile, 2311, a second upper cantilever, 23111, a second upper circular hole, 23112, a second upper circular arc profile, 2312, a second lower cantilever, 23121, a second lower circular arc profile, first 23122, a second connecting arm, 2313, a second lower cantilever, 23131, a second lower circular hole, 23132, a second lower circular arc profile, 2314, a second screw, 2315, a second spring washer and nut assembly, 2316, a second rivet, 2317, a second force-receiving surface, 232, a second contact link, 2321, a second planar profile, 233, a second neutral pole drive arm, 2331, a second neutral pole fixed drive arm, 23311, a second striking rod mounting hole, 23312, a second spring suspension arm hole, 2332, a second striking rod, 234, and a second spring; 24. a second phase pole contact assembly, 241, a second phase pole moving contact, 242, a second phase pole static contact; 25. a second neutral pole contact assembly, 251, a second neutral pole moving contact, 252, a second neutral pole fixed contact;

3. a linkage piece, 31-hole, 32-long slot-shaped hole, 321-bending end; 40. the first switch base 41, the first hinge shaft 411, the first spring hanging groove 42, the first washer 51, the second hinge shaft 511, the second spring hanging groove 52, the second washer 100, and the opening.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments by the applicant is not intended to limit the technical solutions, and any changes made according to the present invention rather than the essential changes should be considered as the protection scope of the present invention.

The utility model relates to a setting is at main epaxial rotation cantilever of rotation, including last cantilever and lower cantilever, it has with main shaft complex last circular arc profile and the connecting portion of external connection to go up the cantilever, the cantilever has with main shaft complex lower circular arc profile and the link of external connection down, go up the cantilever and cantilever fixed connection back down, the last circular arc profile of going up the cantilever splices with the lower circular arc profile of lower cantilever and envelops the main shaft for the main shaft rotates relatively of rotation cantilever.

The utility model discloses a rotating cantilever can use on the dual supply change over switch that has neutral line and overlap conversion function, please refer to fig. 1, fig. 2, dual supply change over switch including connect first power and the first switch 1 of load, connect the second power with the second switch 2 of load with realize linkage 3 of linkage between first switch 1 and the second switch 2, first switch 1 and second switch 2 structure basically the same, it is concrete, first switch 1 include first operating device 10, by the first drive mechanism of first operating device 10 drive, the first contact system of being connected with first drive mechanism. The first contact system includes a first phase contact assembly 14 for controlling the connection or disconnection of the poles of the first power source, and a first neutral contact assembly 15 for controlling the connection or disconnection of the neutral poles of the first power source. The first transmission mechanism of the first switch 1 includes a first main shaft 11 driven by the output of the first operating mechanism 10 to rotate, a first phase pole driving member 12 disposed on the first main shaft 11 and driving the first phase pole contact assembly 14 to turn on or off, and a first neutral pole driving member 13 disposed on the first main shaft 11 and driving the first neutral pole contact assembly 15 to move. The second switch 2 comprises a second operating mechanism 20, a second transmission mechanism driven by the second operating mechanism 20, and a second contact system connected with the second transmission mechanism. The second contact system comprises a second phase contact assembly 24 for correspondingly controlling the connection or disconnection of the second power supply pole and a second neutral contact assembly 25 for correspondingly controlling the connection or disconnection of the second power supply neutral pole. The second transmission mechanism of the second switch 2 includes a second main shaft 21 driven by the output of the second operating mechanism 20 to rotate, a second pole driver 22 disposed on the second main shaft 21 and driving a second pole contact assembly 24 to turn on or off, and a second neutral pole driver 23 disposed on the second main shaft 21 and driving a second neutral pole contact assembly 25 to move. The first neutral pole driving piece 13 of the first switch 1 and the second neutral pole driving piece 23 of the second switch 2 are linked through the linkage piece 3, and in the conversion process of the double-power-supply change-over switch, the first neutral pole contact assembly 15 of the first switch 1 and the second neutral pole contact assembly 25 of the second switch 2 are in short-time overlapped connection.

As shown in fig. 1 and fig. 2, the first phase contact assembly 14 includes a first phase moving contact 141 and a first phase stationary contact 142, which enable a phase of the first switch 1 to be switched on or off, and the first phase moving contact 141 completes the closing or the separation with the first phase stationary contact 142 under the action of the first phase driving component 12. The first neutral contact assembly 15 includes a first neutral moving contact 151 and a first neutral fixed contact 152, which enable a neutral pole of the first switch 1 to be switched on or switched off, the first neutral moving contact 151 completes the closing with the first neutral fixed contact 152 under the action of the first neutral driving member 13, and the first neutral moving contact 151 completes the separation with the first neutral fixed contact 152 under the action of the second neutral driving member 23, the linkage member 3 and the first neutral driving member 13. The first switch 1 and the second switch 2 have substantially the same structure, the second phase contact assembly 24 includes a second phase moving contact 241 and a second phase stationary contact 242, which enable the phase of the second switch 2 to be switched on or off, and the second phase moving contact 241 completes the closing or separation with the second phase stationary contact 242 under the action of the second phase driving element 22. The second neutral contact assembly 25 includes a second neutral moving contact 251 and a second neutral fixed contact 252, which enable the neutral pole of the second switch 2 to be switched on or switched off, the second neutral moving contact 251 completes the closing with the second neutral fixed contact 252 under the action of the second neutral driving member 23, and the second neutral moving contact 251 completes the separation with the second neutral fixed contact 252 under the action of the first neutral driving member 13, the linkage member 3 and the second neutral driving member 23.

As shown in fig. 2 to 5, the first phase pole driver 12 and the second phase pole driver 22 have the same structure, and in the four-pole switch, the number of the first phase pole driver 12 and the second phase pole driver 22 is three. Each of the first phase pole driving members 12 includes a first phase pole upper connecting rod 121 fixed to the first main shaft 11, and a first phase pole lower connecting rod 122 having one end hinged to the first phase pole upper connecting rod 121 and the other end hinged to the first phase pole moving contact 141. The first main shaft 11 rotates to drive the first phase pole moving contact 141 to contact or separate from the first phase pole fixed contact 142 through the first phase pole upper connecting rod 121 and the first phase pole lower connecting rod 122. Each of the second phase driving members 22 includes a second phase upper connecting rod 221 fixed to the second main shaft 21, and a second phase lower connecting rod 222 having one end hinged to the second phase upper connecting rod 221 and the other end hinged to the second phase movable contact 241. The second main shaft 21 rotates to drive the second phase moving contact 241 to contact or separate from the second phase stationary contact 242 through the second phase upper connecting rod 221 and the second phase lower connecting rod 222.

As shown in fig. 2 to 12, the first and second neutral pole drives 13, 23 have the same structure, and in a four-pole switch, there is only one of the first and second neutral pole drives 13, 23. The first neutral driving member 13 includes a first rotating cantilever 131 hinged to the first main shaft 11, a first contact connecting rod 132 having one end hinged to the first rotating cantilever 131 and the other end hinged to the first neutral moving contact 151, a first neutral driving arm 133 fixedly connected to the first main shaft 11, and a first spring 134, wherein one end of the first spring 134 is hung on the first neutral driving arm 133, and the other end is hung on the first hinge shaft 41 which pivotally connects the first rotating cantilever 131 and the first contact connecting rod 132. Here, the rotation center of the first main shaft 11 is defined as O11, the hinge point between the first rotating arm 131 and the first contact link 132 is defined as O13, the hinge point between the first contact link 132 and the first neutral pole moving contact 151 is defined as O12, and the dead point position is defined when three points O11, O13, and O12 are aligned. During the closing process of the first neutral contact assembly 15 of the first switch 1, the first main shaft 11 rotates to drive the first neutral drive arm 133 to rotate therewith, and the first rotating cantilever 131 does not rotate with the first main shaft 11 due to the hollow arrangement with the first main shaft 11, but the first neutral drive arm 133 pushes the first rotating cantilever 131, so that the first neutral drive 13 moves over the dead point position, so that the first neutral movable contact 151 contacts with the first neutral fixed contact 152, and finally is kept at the closing position by the contact pressure and the first limiting member arranged between the first rotating cantilever 131 and the first contact link 132. As shown in fig. 5a, the first limiting member is active when the first neutral pole contact assembly 15 is in the closed position. Next, a first limiting member structure is explained, as shown in fig. 6a, the first limiting member includes a first inclined surface profile 1310 provided at one end of the first rotating cantilever 131 hinged to the first contact link 132 and a first flat surface profile 1321 provided at one end of the first contact link 132 hinged to the first rotating cantilever 131, and the first inclined surface profile 1310 and the first flat surface profile 1321 are matched with each other.

As shown in fig. 2 to 12, the second neutral driving member 23 is disposed in the same manner as the first neutral driving member 13, the second neutral driving member 23 includes a second rotating arm 231 hinged to the second main shaft 21, a second contact link 232 having one end hinged to the second rotating arm 231 and the other end hinged to the second neutral moving contact 251, a second neutral driving arm 233 fixed to the second main shaft 21, and a second spring 234, one end of the second spring 234 is hung on the second neutral driving arm 233, and the other end is hung on the second hinge shaft 51 which pivots the second rotating arm 231 and the second contact link 232. Here, the rotation center of the second main shaft 21 is defined as O21, the hinge point between the second rotation cantilever 231 and the second contact link 232 is defined as O23, the hinge point between the second contact link 232 and the second neutral pole movable contact 251 is defined as O22, and the dead point position is defined when three points O21, O23, and O22 are aligned. During the closing process of the second neutral contact assembly 25 of the second switch 2, the second main shaft 21 rotates to drive the second neutral drive arm 233 to rotate therewith, and the second rotating cantilever 231 does not rotate with the second main shaft 21 due to the hollow arrangement with the second main shaft 21, but the second neutral drive arm 233 pushes the second rotating cantilever 231, so that the second neutral drive member 23 moves over the dead point position, so that the second neutral movable contact 251 contacts with the second neutral fixed contact 252, and is finally held in the on position by the contact pressure and the second limiting member arranged between the second rotating cantilever 231 and the second contact link 232. As shown in fig. 5b, the second stop member is active when the second neutral contact assembly 25 is in the closed position. Next, a second limiter structure is described, as shown in fig. 6b, the second limiter structure includes a second inclined surface profile 2310 disposed at one end of the second rotating cantilever 231 hinged to the second contact link 232 and a second flat surface profile 2321 disposed at one end of the second contact link 232 hinged to the second rotating cantilever 231, and the second inclined surface profile 2310 and the second flat surface profile 2321 are matched with each other.

As shown in fig. 4a and 5a, the first rotating cantilever 131 includes a first upper cantilever 1311, a first lower cantilever, a first screw 1314, a first spring washer and nut assembly 1315, and a first rivet 1316. The first upper suspension arm 1311 has a first upper circular arc profile 13112 engaged with the first spindle 11, the first lower suspension arm has a first lower circular arc profile engaged with the first spindle 11, and after the first upper suspension arm 1311 and the first lower suspension arm are fixedly connected, the first upper circular arc profile 13112 and the first lower circular arc profile are spliced to envelop the first spindle 11, so that the first rotating suspension arm 131 can rotate relative to the first spindle 11. The first lower suspension arm comprises a first lower suspension arm 1312 and a second lower suspension arm 1313; a first lower arc profile 13121 is formed on an end surface of the first lower suspension 1312 facing the first spindle 11, and a pair of first connecting arms 13122 is formed by extending both sides of the first lower arc profile 13121 toward the first upper suspension 1311, so that the upper end of the first lower suspension 1312 is U-shaped; a pair of first connecting arms 13122 of the first lower suspension 1312 is fixed to the first upper suspension 1311, and the first lower suspension 1312 is fixed to the first lower suspension 1313, so that the first upper suspension 1311 is joined to the first lower suspension 1313, and the first arc profile 13121 constitutes the first lower arc profile; if the first lower arm 1313 further includes a first lower circular arc profile 13132 on an end surface facing the first spindle 11, the first lower circular arc profile 13132 and the first circular arc profile 13121 form a first lower circular arc profile, and the first lower circular arc profile and the first upper circular arc profile 13112 form a complete circle to enclose the first spindle 11.

In this embodiment, the first rotating suspension arm 131 is formed by splicing a first upper suspension arm 1311, a first lower suspension arm 1312 and a second first lower suspension arm 1313, so that the first rotating suspension arm is convenient to mount after the surface treatment of the first spindle 11, and the surface treatment of the first spindle 11 is simple. The first lower suspension 1312 and the second lower suspension 1313 are made of different materials and are riveted by the first rivet 1316, and have a common center O₁₁. The first lower suspension arms 1312 are two pieces with the same structure, and are respectively arranged on two sides of the first upper suspension arm 1311 and the first lower suspension arm 1313, wherein the material of the first lower suspension arm 1312 can be tin bronze and has low strength, the first lower suspension arm 1312 is riveted with the first lower suspension arm 1313 through the first rivet 1316, and meanwhile, the first lower suspension arm 1312 is fixed with the first upper suspension arm 1311 through the first screw 1314 and the first elastic pad and nut assembly 1315. The first inclined surface profile 1310 is disposed on the first lower suspension arm two 1313, the first lower suspension arm one 1312 and the first lower suspension arm two 1313 have a same profile surface after riveting to form a first force bearing surface 1317, and the first force bearing surface 1317 is matched with a first striking rod 1332 to be described below, so that the striking surface acted by the first striking rod 1332 is large and is not easy to deform. Compared with the first lower cantilever made of a single high-strength material, the first lower cantilever riveted by different materialsThe wear resistance and stability are better when the spindle rotates around the first main shaft 11; meanwhile, compared with the first lower cantilever made of a single wear-resistant material, the first lower cantilever riveted by different materials has higher mechanical strength. The first rotating arm 131 composed of the first upper arm 1311, the first lower arm 1312, and the first lower arm 1313 has a second arm O₁₁A complete circular ring as a circle center, hinged to the first main shaft 11 and rotatable about a center O₁₁And (4) rotating. One end of the first upper cantilever 1311 has a first upper circular hole 13111, and the first upper circular hole 13111 is formed on a connecting portion of the first upper cantilever 1311, which is connected to the outside, and has a circle center O₁₄. The first lower second cantilever 1313 has a first lower circular hole 13131 hinged to the first contact link 132, and the first lower circular hole 13131 is formed on the connection end of the first lower cantilever 1313 to the external connection and has a center O₁₃. Center of circle O₁₄Center of circle O₁₃In the presence of O₁₁On the circumference of the circle center. The first rotating cantilever 131 passes through the first lower circular hole 13131 of the first lower cantilever and the corresponding hole on the first contact link 132 through the first hinge shaft 41 to realize the hinge connection with the first contact link 132, and the hinge center is O₁₃。

As shown in fig. 1, 3a, 3b, 5a, and 6a, the first neutral driving arm 133 includes a pair of first neutral fixed driving arms 1331 and a first driving rod 1332, the pair of first neutral fixed driving arms 1331 are disposed in parallel at both sides of the first rotating cantilever 131, one end of each of the pair of first neutral fixed driving arms 1331 is fixed to the first main shaft 11, the other end of each of the pair of first driving arms 1332 is provided with a first driving rod mounting hole 13311 at a corresponding position, the first driving rod 1332 is clamped between the pair of first neutral fixed driving arms 1331 through the first driving rod mounting hole 13311, and the first driving rod 1332 cooperates with the first force receiving surface 1317. A first spring cantilever hole 13312 for hanging the first spring 134 is further formed at one end of the pair of first neutral pole fixed driving arms 1331, which holds the first driving rod 1332. The first springs 134 are also a pair, and are disposed at both sides of the first rotating arm 131. A first spring hanging groove 411 for hanging the first spring 134 is formed at both ends of the first hinge shaft 41.

As shown in fig. 4b and 5b, the second rotating cantilever 231 includes a second upper cantilever 2311, a second lower cantilever, a second screw 2314, a second spring washer and nut assembly 2315 and a second rivet 2316. The second upper suspension arm 2311 has a second upper circular arc profile 23112 matched with the second spindle 21, the second lower suspension arm has a second lower circular arc profile matched with the second spindle 21, and after the second upper suspension arm 2311 and the second lower suspension arm are fixedly connected, the second upper circular arc profile 23112 and the second lower circular arc profile are spliced to envelop the second spindle 21, so that the second rotating suspension arm 231 can rotate relative to the second spindle 21. The second lower cantilever comprises a first lower cantilever 2312 and a second lower cantilever 2313; a second lower circular arc profile surface first 23121 is formed on an end surface of the second lower suspension arm first 2312 facing the second main shaft 21, and a pair of second connecting arms 23122 are formed by extending two sides of the second lower circular arc profile surface first 23121 towards the second upper suspension arm 2311, so that the upper end of the second lower suspension arm first 2312 is U-shaped; the pair of second connecting arms 23122 of the first lower suspension arm 2312 are fixed with the second upper suspension arm 2311, and the first lower suspension arm 2312 is fixed with the second lower suspension arm 2313, so that the second upper suspension arm 2311 is jointed with the second lower suspension arm 2313, and the first circular arc profile 23121 forms the second lower circular arc profile; if a second lower circular arc profile surface two 23132 is further formed on an end surface of the second lower suspension arm two 2313 facing the second main shaft 21, the second lower circular arc profile surface two 23132 and the second circular arc profile surface one 23121 are arranged side by side to form a second lower circular arc profile surface, and the second lower circular arc profile surface and the second upper circular arc profile surface 23112 form a complete circle to envelop the second main shaft 21.

In this embodiment, the second rotating suspension arm 231 is formed by splicing the second upper suspension arm 2311, the second lower suspension arm 2312 and the second lower suspension arm 2313, so that the second rotating suspension arm is conveniently installed after the surface of the second spindle 21 is processed, and the surface processing of the second spindle 21 is simple. The first lower cantilever 2312 and the second lower cantilever 2313 are made of different materials and are riveted through a second rivet 2316, and the first lower cantilever and the second lower cantilever have a common circle center O₂₁. The number of the first lower cantilevers 2312 is two with the same structure, the two first lower cantilevers are respectively arranged on two sides of the first upper cantilever 2311 and the second lower cantilever 2313, the first lower cantilevers 2312 are made of tin bronze and are low in strength, and the first lower cantilevers 2312 pass through the first lower cantilevers 2312Two rivets 2316 are riveted to the second lower cantilever two 2313, while the second lower cantilever one 2312 is fixed to the second upper cantilever 2311 by a second screw 2314, a second spring washer and nut assembly 2315. The second inclined surface profile 2310 is arranged on the second lower cantilever 2313, the second lower cantilever 2312 and the second lower cantilever 2313 are riveted to form a second stress surface 2317 by a same profile surface, and the second stress surface 2317 is matched with a second striking rod 2332 to be described below, so that the striking surface acted by the second striking rod 2332 is large and is not easy to deform. Compared with a second lower cantilever made of a single high-strength material, the second lower cantilever riveted by different materials has better wear resistance and stability when rotating around the second main shaft 21; meanwhile, compared with the second lower cantilever made of a single wear-resistant material, the second lower cantilever riveted by different materials has higher mechanical strength. The second rotating arm 231 composed of the second upper arm 2311, the second lower arm 2312 and the second lower arm 2313 has a second arm O₂₁A complete circular ring as a center of circle, hinged to the second main shaft 21 and rotatable about the center O₂₁And (4) rotating. One end of the second upper cantilever 2311 is provided with a second upper round hole with a circle center O₂₄The second lower cantilever 2313 has a second lower circular hole 23131 hinged to the second contact link 232 and having a center O₂₃Center of circle O₂₄Center of circle O₂₃In the presence of O₂₁On the circumference of the circle center. The second rotating cantilever 231 is hinged with the second contact link 232 by the second hinge shaft 51 passing through the second lower round hole 23131 of the second lower cantilever and the corresponding hole on the second contact link 232, and the hinge center is O₂₃。

As shown in fig. 1, 5b and 6b, the second neutral driving arm 233 includes a pair of second neutral fixing driving arms 2331 and a second striking rod 2332, the pair of second neutral fixing driving arms 2331 are disposed at two sides of the second rotating cantilever 231 in parallel, one end of each second neutral fixing driving arm is fixed to the second main shaft 21, a second striking rod mounting hole 23311 is disposed at the other end of each second neutral fixing driving arm, the second striking rod 2332 is clamped between the pair of second neutral fixing driving arms 2331 through the second striking rod mounting hole 23311, and the second striking rod 2332 cooperates with the second force-bearing surface 2317. A second spring arm hanging hole 23312 for hanging the second spring 234 is further formed at one end of the pair of second neutral pole fixed driving arms 2331, which holds the second striking rod 2332. The second springs 234 are also provided in a pair, respectively, on both sides of the second rotating arm 231. A second spring hanging groove 511 for hanging the second spring 234 is formed at two ends of the second hinge shaft 51.

In addition to the above preferred embodiment, when the first lower circular arc profile is constituted by the first lower circular arc profile second 13132, the structure in this case may be such that the first lower arm is constituted by the single first lower arm second 1313; or, the first lower suspension arm is formed by a first lower suspension arm 1312 and a second lower suspension arm 1313 together, but the first lower suspension arm 1312 is not provided with a first lower arc profile surface 13121, but a semicircular shaft sleeve can be mounted on the second lower arc profile surface 13132, so that the inner circular profile surface of the semicircular shaft sleeve is spliced with the first upper arc profile surface 13112 to envelop the first spindle 11; when the first lower arc profile surface 13121 and the first lower arc profile surface 13132 form a second lower arc profile surface side by side, a semicircular shaft sleeve may be mounted on the first lower arc profile surface 13121 and the first lower arc profile surface 13132, so that the inner circular profile surface of the semicircular shaft sleeve is spliced with the first upper arc profile surface 13112 to envelop the first spindle 11. And the shaft sleeve can also be arranged on the second lower arc profile surface.

In summary, the structure of the first rotating cantilever 131 and the second rotating cantilever 231 according to the present embodiment adopts the rotating cantilever according to the present invention, and the structural features of the first upper cantilever 1311, the first lower cantilever 1312, the first lower cantilever 1313, the second upper cantilever 2311, the second lower cantilever 2312 and the second lower cantilever 2313 can be summarized, the lower cantilever of the rotating cantilever includes a first lower cantilever and a second lower cantilever, the first lower cantilever is a pair and is respectively disposed at two sides of the first upper cantilever and the second lower cantilever, a first lower circular arc contour surface is formed on an end surface of each of the first lower cantilevers facing the main shaft, a pair of connecting arms is formed by extending two sides of the first lower circular arc contour surface in the upward cantilever direction, so that the upper end of the first lower cantilever is U-shaped, the first lower circular arc contour surface of the lower cantilever is only formed by the first lower circular arc contour surface of the first lower cantilever, the pair of connecting arms of the lower cantilever I is fixed with the upper cantilever I, the lower cantilever I is fixed with the lower cantilever II, and the lower arc profile surface of the lower cantilever and the upper arc profile surface of the upper cantilever envelop the spindle.

The lower cantilever can also be arranged as follows: still include lower cantilever one, lower cantilever two, the last extension of the face of lower cantilever one facing to the cantilever is formed with a pair of linking arm, the face of lower cantilever two is formed with lower circular arc profile two on the terminal surface of main shaft, the lower circular arc profile of lower cantilever only comprises lower circular arc profile two of lower cantilever two, a pair of linking arm and the last cantilever of lower cantilever one are fixed, and lower cantilever one is fixed with lower cantilever two, realize that the upper cantilever joins with lower cantilever two, the lower circular arc profile of lower cantilever and the last circular arc profile of upper cantilever envelop the main shaft. Furthermore, the lower arc profile surface of the lower cantilever can be formed by splicing the lower arc profile surface I of the lower cantilever I and the lower arc profile surface II of the lower cantilever II in parallel. Furthermore, the lower cantilevers one are a pair and are respectively arranged at two sides of the upper cantilever and the lower cantilever.

Or, the lower suspension arm can also be only composed of a second lower suspension arm, the second lower suspension arm extends upwards to form a connecting arm fixed with the upper suspension arm, a second lower arc profile surface is formed on one end surface of the second lower suspension arm facing the main shaft, the second lower arc profile surface forms the second lower arc profile surface, and the second lower arc profile surface and the second upper arc profile surface form a whole circle to envelop the main shaft. Furthermore, the second lower cantilevers are a pair and are respectively arranged on two sides of the second upper cantilevers.

As shown in fig. 3b, during the closing rotation of the first spindle 11, the first neutral driving arm 133 and the first phase upper connecting rod 121 both rotate along with the first spindle 11, while the first rotating cantilever 131 does not rotate along with the first spindle 11, and the first striking rod 1332 of the first neutral driving arm 133 pushes the first force-bearing surface 1317 of the first rotating cantilever 131, so as to push the first rotating cantilever 131 to rotate, and the first neutral moving contact 151 is driven by the first contact connecting rod 132 to move toward the first neutral stationary contact 152. Wherein the first neutral drive arm 133 is opposite to the second neutral drive armThe upper connecting rod 121 of one phase has an angular offset in the radial direction of the first main axis 11, which is to ensure that: the first neutral electrode moving contact 151 pushed by the first neutral electrode driving arm 133 reaches the closing position of the corresponding stationary contact earlier than the first phase electrode moving contact 141 driven by the first phase electrode upper link 121, that is, the first neutral electrode contact assembly 15 is closed earlier than the first phase electrode contact assembly 14. The angle of deflection is affected by the position of the first force-bearing surface 1317 at which the first rotating cantilever 131 is located. In the switching-off state of the first switch 1, the first switch 1 is switched on, and during the switching-on process of the first switch 1, the first transmission mechanism and the first contact system of the left first switch 1 shown in fig. 12 are used for illustration, in which the first spindle 11 rotates clockwise to drive the first neutral drive arm 133 around O₁₁When the first neutral drive arm 133 is rotated clockwise, the first force-receiving surface 1317 on the first rotating arm 131 is pressed until the first neutral drive arm 133 presses the first rotating arm 131 past the dead point position, and the point of action of the first neutral drive arm 133 on the first rotating arm 131 is always above the first switch base 40 of the first switch 1 (see fig. 1, above the surface of the first switch base 40 on which the first spindle 11 is fixed). The size of the opening 100 corresponding to the neutral pole of the first switch is basically the same as that of the openings corresponding to other poles, the contact system and the first main shaft 11 are isolated, the size of the whole change-over switch is not increased, and the structure is simple and compact. The closing process of the second switch 2 is the same as the closing process of the first switch 1, and will not be repeated here.

A link 3 is disposed between the first neutral driving member 13 and the second neutral driving member 23, as shown in fig. 7 and 8, one end of the link 3 is hinged to the first hinge shaft 41 connecting the first rotating cantilever 131 and the first contact link 132, and the other end of the link 3 is hinged to the second rotating cantilever 231 through the second upper circular hole 23111, specifically: as shown in fig. 7, a hole 31 is formed at one end of the link 3, and the link is hinged to the first rotating arm 131 through a first lower circular hole 13131, the hole 31, a first hinge shaft 41, and a first washer 42. The other end of the link 3 is provided with a slot-shaped hole 32, and the other end of the link 3 is hinged to the second rotating cantilever 231 through the second upper circular hole 23111, the slot-shaped hole 32, the second hinge shaft 51 and the second washer 52. The linkage 3 is formed by a pair of rod-shaped members with two bent ends, and is respectively arranged on two sides of the first neutral pole driving member 13 and the second neutral pole driving member 23. The end part of the linkage 3 hinged to the first rotating cantilever 131 forms a bending part which extends into the opening 100 on the first switch base 40, so that the size of the opening 100 corresponding to the neutral pole of the first switch 1 is basically the same as that of the openings corresponding to other poles, the size of the whole change-over switch is not increased while the isolation arrangement of the contact system and the main shaft is ensured, in addition, the actuating points of the linkage 3 and the first rotating cantilever 131 can be arranged in the first switch base 40, and the structure is simple and compact. The long slot-shaped hole 32 is opened along the bending direction of the rod-shaped member and is provided with a bending end 321, and the bending end 321 has the following functions: referring to fig. 1 and 7, when the first switching neutral contact assembly 15 is separated, if the second switching neutral contact assembly 25 is also in the separated position, the second hinge shaft 51 is located at the bent end 321 of the elongated slot-shaped hole 32, so that the end of the link 3 provided with the elongated slot-shaped hole 32 is pushed away from the second main shaft 21, and interference between the two is prevented. The width of the rod-shaped member at the bending part of one end provided with the long groove-shaped hole 32 is wider than that of other parts of the rod-shaped member, and the strength is increased.

Referring to fig. 8 to fig. 12, the dual power transfer switch of the present invention has the following working processes:

as shown in FIGS. 8 and 9, O₁₁Is the center of rotation, O, of the first rotating cantilever 131 about the first main shaft 11₁₂Is the hinge center of the first neutral pole moving contact 151 and the first contact link 132, O₁₃Is the hinge center of the first rotating cantilever 131 and the first contact link 132. O is₁₃At O₁₁And O₁₂When on the line of (2), O₁₃At the dead-center position. O is₁₃Clockwise past O₁₁And O₁₂The process of stopping movement under the limiting action between the first rotating cantilever 131 and the first contact link 132 after the connection is defined as a self-locking process, O₁₃Counter clockwise over O₁₁And O₁₂The process of wiring of (a) is defined as an unlocking process. O is₂₁Is the center of rotation, O, of the second rotating cantilever 231 about the second main shaft 21₂₂Is the hinge center, O, of the second neutral pole moving contact 251 and the second contact link 232₂₃Which is the hinge center of the second rotating cantilever 231 and the second contact link 232. O is₂₃At O₂₁And O₂₂When on the line of (2), O₂₃At the dead-center position. O is₂₃Clockwise past O₂₁And O₂₂After the connection, the process of stopping the movement under the limiting action between the second rotating cantilever 231 and the second contact link 232 is defined as a self-locking process, O₂₃Counter clockwise over O₂₁And O₂₂The process of wiring of (a) is defined as an unlocking process.

When the first switch 1 is in a closing state and the second switch 2 is in an opening state, the change-over switch is switched, and the first switch 1 drives the first spindle 11 to rotate around the first rotation center O under the action of the first operating mechanism 10₁₁In the counterclockwise motion, the first main shaft 11 drives the first phase pole moving contact 141 to the opening position through the first phase pole driving component 12, and the first phase pole contact assembly 14 is opened; since the first rotating cantilever 131 can rotate around the first main shaft 11, and the first rotating cantilever 131 and the first contact link 132 are in a self-locking state, the first neutral pole moving contact 151 is still in a closing state, and the first neutral pole is in a conducting state; the second switch 2 drives the second spindle 21 to rotate around the second rotation center O under the action of the second operating mechanism 20₂₁The main shaft 21 starts to move clockwise, the main shaft 21 drives the second phase driving member 22 and the second neutral driving arm 233 to move, the second neutral driving arm 233 drives the second rotating cantilever 231 to move through the second striking rod 2332, so that the second phase moving contact 241 and the second neutral moving contact 251 start to move in the direction of contacting the second phase fixed contact 242 and the second neutral fixed contact 252, respectively, because the second neutral driving arm 233 fixed on the second main shaft 21 and the second phase connecting rod 221 have an included angle α, the second neutral moving contact 251 is closed and conducted earlier than the second phase moving contact 241, that is, at the moment of conducting the neutral pole of the second switch 2, the phase pole of the second switch 2 is in an off state, and the hinge center of the second rotating cantilever 231 and the second contact connecting rod 232O₂₃Driven by the second main shaft 21 and the second neutral pole driving arm 233 to pass clockwise over O₂₁O₂₂And (5) performing connecting motion to prepare self-locking. At this time, the first switch 1 and the second switch 2 are in a neutral pole simultaneous on state, and the neutral poles start to overlap; the phases of the first and second switches 1 and 2 are in the simultaneously open state, as shown in fig. 9.

The conversion process continues, the second main shaft 21 continues to move, so that the second moving contact 251 of the neutral pole keeps in contact with the second fixed contact 252 of the neutral pole, and the neutral pole of the second switch 2 keeps conducting; the second phase moving contact 241 also moves to a contact position contacting with the second phase stationary contact 242, and the phase of the second switch 2 is conducted. Hinge center O of the second rotating arm 231 and the second contact link 232₂₃Driven by the second main shaft 21 to move to O₂₁O₂₂The line, i.e. the dead center position, then starts the self-locking process. In the process of the movement of the second rotating cantilever 231, the second rotating cantilever 231 drives the link 3 to move, and the link 3 drives the first rotating cantilever 131 and the hinge center O of the first contact link 132₁₃In the counterclockwise direction O₁₁And O₁₂Is moved in the direction of the connecting line, ready for unlocking, but O₁₃Not passing over O₁₁And O₁₂In the connection line (2), the first neutral moving contact 151 is not unlocked, so the first neutral moving contact 151 still keeps in contact with the first neutral fixed contact 152, and the neutral pole of the first switch 1 still keeps on. At this time, the neutral poles of the first switch 1 and the second switch 2 are simultaneously turned on, and the neutral poles are kept in an overlapped state; the phase pole of the first switch 1 is off and the phase pole of the second switch 2 is on, as shown in fig. 10.

The switching process continues, the second main shaft 21 continues to move, so that the second phase moving contact 241 moves to the switching-on position, the second phase moving contact 241 keeps contacting with the second phase fixed contact 242, and the second rotating cantilever 231 and the hinge center O of the second contact connecting rod 232 are connected to each other₂₃Driven by the second main shaft 21 and the second striking rod 2332 clockwise past O₂₁O₂₂Connecting the wire and entering a self-locking state. The neutral pole and the phase pole of the second switch 2 remain conductive. During the movement of the second rotating arm 231 to the self-locking stateIn the middle, the second rotating cantilever 231 continues to drive the link 3 to move, and the link 3 continues to drive the first rotating cantilever 131 and the hinge center O of the first contact link 132₁₃Counter clockwise over O₁₁And O₁₂The unlocking is completed, but at this time, the first neutral moving contact 151 still keeps in contact with the first neutral fixed contact 152, so that the neutral pole of the first switch 1 still keeps on. At this time, the neutral poles of the first switch 1 and the second switch 2 are simultaneously turned on, and the neutral poles continue to be in an overlapped state; the phase pole of the first switch 1 is off and the phase pole of the second switch 2 is on, as shown in fig. 11.

The switching process continues, the second main shaft 21 stops moving, the second neutral moving contact 251 and the second phase moving contact 241 both reach the switching-on position, and the neutral pole and the phase pole of the second switch 2 both remain conductive. The second rotating cantilever 231 and the second contact link 232 are in a self-locking state. After the first rotating cantilever 131 and the first contact link 132 are unlocked, the first neutral pole moving contact 151 is pulled to move to the open position under the action of the first spring 134 and is kept at the open position by the acting force of the first spring 134, and the neutral pole of the first switch 1 is in the off state. At this time, the neutral pole of the first switch 1 is turned off, the neutral pole of the second switch 2 is turned on, and the neutral poles end the overlapped state; the phase pole of the first switch 1 is off and the phase pole of the second switch 2 is on, as shown in fig. 12. So far, the overlapping conversion of the neutral poles of the dual-power transfer switch is completed.

First rotating boom 131 and second rotating boom 231 not limited to the above-mentioned embodiment, first rotating boom 131 may only be composed of first upper boom 1311 and first lower boom 1313 shown in fig. 4a, and first lower boom 1312 is not provided, and at this time, the circular arc surfaces on first upper boom 1311 and first lower boom 1313 are still spliced to form a complete circle, but both of them are fixed to each other and then formed, for example, a connecting arm fixed to first upper boom 1311 is directly extended on first lower boom 1313. The second rotating suspension arm 231 may be only composed of the second upper suspension arm 2311 and the second lower suspension arm 2313 shown in fig. 4b, and the second lower suspension arm 2312 is not provided, at this time, the arc surfaces on the second upper suspension arm 2311 and the second lower suspension arm 2313 are still spliced to form a complete circle, but the two can be fixed by extending towards each other, for example, directly extending on the second lower suspension arm 2313 to form a connecting arm fixed with the second upper suspension arm 2311.

As shown in fig. 13a, the first neutral drive arm 133 may be further composed of a single first neutral fixed drive arm 1331 and a first striking rod 1332, wherein the first striking rod 1332 is installed at an end portion of the first neutral fixed drive arm 1331. Similarly, as shown in fig. 13b, the second neutral driving arm 233 may further include a single second neutral fixed driving arm 2331 and a second striking rod 2332, and the second striking rod 2332 is installed at an end of the second neutral driving arm 233. The first neutral drive arm 133 is not limited to the above-described embodiment, and only the first neutral fixed drive arm 1331 may be provided, and a link connecting the two first lower suspension arms 1312 may be provided at the first force receiving surface 1317 of the two first lower suspension arms 1312, so that the first neutral fixed drive arm 1331 directly acts on the link at the time of operation, thereby pushing the first rotating suspension arm 131.

In the above preferred embodiment, the first rotating arm 131 and the second rotating arm 231 are two parts having the same structural shape, but the present invention is not limited to the above structure, and the first rotating arm 131 and the second rotating arm 231 may be configured to have different shapes.

Claims (12)

1. A rotary cantilever arranged on a main shaft is characterized in that: including last cantilever and lower cantilever, it has with main shaft complex go up circular arc profile surface and the connecting portion of external connection to go up the cantilever, down the cantilever have with main shaft complex lower circular arc profile surface and the link of external connection, go up cantilever and lower cantilever fixed connection back, the last circular arc profile surface of going up the cantilever and the lower circular arc profile surface concatenation of lower cantilever are with the main shaft envelope for it can rotate the main shaft relatively to rotate the cantilever.

2. The rotating jib for a spindle according to claim 1, wherein the lower jib comprises a first lower jib and a second lower jib, the first lower jib is a pair and is disposed on two sides of the first upper jib and the second lower jib, a first lower circular contour surface is formed on an end surface of each of the first lower jibs of the pair of first lower jibs facing the spindle, two sides of the first lower circular contour surface extend in the direction of the upper jib to form a pair of connecting arms, so that an upper end of the first lower jib is U-shaped, the first lower circular contour surface forms a first lower circular contour surface of the lower jib, the pair of connecting arms of the first lower jib is fixed to the first upper jib, the first lower jib is fixed to the second lower jib, and the first lower circular contour surface of the lower jib and the upper circular contour surface of the upper jib envelop the spindle.

3. The rotating jib for a spindle of claim 1, wherein the lower jib comprises a first lower jib and a second lower jib, a pair of connecting arms is formed by extending an end surface of the first lower jib facing the upper jib, a second lower arc profile is formed by an end surface of the second lower jib facing the spindle, the second lower arc profile forms the second lower arc profile, the pair of connecting arms of the first lower jib is fixed to the upper jib, and the first lower jib is fixed to the second lower jib to allow the upper jib to be engaged with the second lower jib, and the second lower arc profile of the lower jib and the upper arc profile of the upper jib envelop the spindle.

4. The rotating boom provided on a main shaft according to claim 3, wherein an end surface of the first lower boom facing the main shaft is formed with a first lower circular contour surface, and the pair of connecting arms are formed on both sides of the first lower circular contour surface so that an end of the first lower boom connected to the upper boom is U-shaped, and the first lower circular contour surface and the second lower circular contour surface are arranged side by side to form the lower circular contour surface of the lower boom.

5. The rotating jib for a slewing gear according to claim 4 wherein said lower jib is a pair, disposed on both sides of said upper jib and said lower jib.

6. The rotating jib for mounting on a spindle of claim 1, wherein said lower jib is a second lower jib, said second lower jib extends upward to form a connecting arm fixed to said upper jib, a second lower circular contour surface is formed on an end surface of said second lower jib facing said spindle, said second lower circular contour surface forms a second lower circular contour surface of said lower jib, said second lower circular contour surface and said upper circular contour surface of said upper jib form a complete circle to envelop said spindle.

7. The rotating jib for a slewing gear according to claim 6 wherein said second lower jib is a pair, each of said pair being disposed on either side of said second upper jib.

8. The rotating cantilever according to claim 1, wherein the lower circular contour surface is provided with a sleeve, the spindle is enveloped by the upper circular contour surface and the sleeve, and the spindle is indirectly enveloped by the upper circular contour surface of the upper cantilever and the lower circular contour surface of the lower cantilever, so that the rotating cantilever can rotate relative to the spindle.

9. A double-power-supply change-over switch comprises a first switch (1) for connecting a first power supply and a load, a second switch (2) for connecting a second power supply and the load, and a linkage piece (3) for realizing linkage between the first switch (1) and the second switch (2), wherein the first switch (1) comprises a first operating mechanism (10), a first neutral contact assembly (15) for correspondingly controlling the connection or disconnection of a neutral pole of the first power supply, a first main shaft (11) driven to rotate by the output of the first operating mechanism (10), and a first neutral driving piece (13) arranged on the first main shaft (11) and used for driving the first neutral contact assembly (15) to move; the second switch (2) comprises a second operating mechanism (20), a second neutral pole contact assembly (25) for correspondingly controlling the connection or disconnection of the neutral pole of the second power supply, a second main shaft (21) driven by the output of the second operating mechanism (20) to rotate, and a second neutral pole driving piece (23) arranged on the second main shaft (21) and used for driving the second neutral pole contact assembly (25) to act; the first neutral pole driving piece (13) of the first switch (1) and the second neutral pole driving piece (23) of the second switch (2) are linked through the linkage piece (3), and in the process of switching the double-power-supply change-over switch, the first neutral pole contact assembly (15) of the first switch (1) and the second neutral pole contact assembly (25) of the second switch (2) are switched on in a short-time overlapping mode, and the double-power-supply change-over switch is characterized in that: the first neutral pole driving member (13) comprises the rotating cantilever as claimed in any one of the above claims 1 to 6, namely, the first rotating cantilever (131), the first neutral pole driving member (13) further comprises a first contact connecting rod (132) having one end hinged to the connecting end of the lower cantilever of the first rotating cantilever (131) and the other end hinged to the first neutral pole moving contact (151) of the first neutral pole contact assembly (15), a first neutral pole driving arm (133) fixedly connected to the first main shaft (11), and a first spring (134), during the closing process of the first neutral pole contact assembly (15) of the first switch (1), the first main shaft (11) rotates to drive the first neutral pole driving arm (133) to rotate, the first neutral pole driving arm (133) pushes the first rotating cantilever (131), so that the hinge point of the first rotating cantilever (131) and the first contact connecting rod (132) crosses the dead point position, switching on the first neutral contact assembly (15); the second neutral pole driving member (23) comprises the rotating cantilever as claimed in any one of the claims 1 to 6, namely, the second rotating cantilever (231), the second neutral pole driving member (23) further comprises a second contact link (232) having one end hinged to the connecting end of the lower cantilever of the second rotating cantilever (231) and the other end hinged to the second neutral pole moving contact (251) of the second neutral pole contact assembly (25), a second neutral pole driving arm (233) fixedly connected to the second main shaft (21), and a second spring (234), during the closing process of the second neutral pole contact assembly (25) of the second switch (2), the second main shaft (21) rotates to drive the second neutral pole driving arm (233) to rotate, the second neutral pole driving arm (233) pushes the second rotating cantilever (231) so that the hinge point of the second rotating cantilever (231) and the second contact link (232) crosses the dead point position, and closing the second neutral pole contact assembly (25), wherein the connecting end of the lower cantilever of the first rotating cantilever (131) is connected with the connecting part of the upper cantilever of the second rotating cantilever (231) through a linkage (3).

10. The dual power transfer switch of claim 9, wherein a first limiting member is disposed between the first rotating cantilever (131) and the first contact link (132), the first limiting member comprises a first inclined profile (1310) disposed at an end of the first rotating cantilever (131) hinged to the first contact link (132) and a first planar profile (1321) disposed at an end of the first contact link (132) hinged to the first rotating cantilever (131), and when the first neutral pole contact assembly (15) is in the closed position, the first inclined profile (1310) and the first planar profile (1321) cooperate to lock the first neutral pole contact assembly (15) in the open position; a second limiting part is arranged between the second rotating cantilever (231) and the second contact connecting rod (232), the second limiting part comprises a second inclined surface profile (2310) arranged at one end, hinged to the second contact connecting rod (232), of the second rotating cantilever (231) and a second plane profile (2321) arranged at one end, hinged to the second rotating cantilever (231), of the second contact connecting rod (232), and when the second neutral pole contact assembly (25) is located at the closed position, the second inclined surface profile (2310) and the second plane profile (2321) are matched with each other to lock the second neutral pole contact assembly (25) at the closing position.

11. The dual-power transfer switch of claim 9, wherein the first neutral driving arm (133) comprises a pair of first neutral fixed driving arms (1331) and a first striking rod (1332), the pair of first neutral fixed driving arms (1331) are arranged in parallel on two sides of the first rotating cantilever (131), one end of each first neutral fixed driving arm is fixed with the first spindle (11), the other end of each first neutral fixed driving arm is provided with the first striking rod (1332), and the first striking rod (1332) is matched with the first rotating cantilever (131); the second neutral pole driving arm (233) comprises a pair of second neutral pole fixed driving arms (2331) and a second striking rod (2332), the pair of second neutral pole fixed driving arms (2331) are arranged on two sides of the second rotating cantilever (231) in parallel, one end of each second neutral pole fixed driving arm is fixed with the second spindle (21), the other end of each second neutral pole fixed driving arm is provided with the second striking rod (2332), and the second striking rods (2332) are matched with the second rotating cantilever (231).

12. The dual power transfer switch of claim 9, wherein the first neutral drive arm (133) is further comprised of a single first neutral fixed drive arm (1331) and a first striker rod (1332), the first striker rod (1332) being mounted to an end of the first neutral fixed drive arm (1331); the second neutral driving arm (233) may further include a single second neutral fixed driving arm (2331) and a second striking rod (2332), and the second striking rod (2332) is installed at an end of the second neutral driving arm (233).

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