CN113593866A

CN113593866A - Fast mechanism of on-load tap-changer

Info

Publication number: CN113593866A
Application number: CN202110806115.XA
Authority: CN
Inventors: 张书琦; 李鹏; 汪可; 李金忠; 殷禹; 李戈琦; 李嘉熙; 李刚; 杨帆; 程涣超; 肖毅; 杨建琴; 朱强; 余一鸣; 孙建涛; 刘雪丽; 梁宁川; 徐征宇; 王健一; 谭瑞娟
Original assignee: Shanghai Huaming Power Equipment Co Ltd; China Electric Power Research Institute Co Ltd CEPRI
Current assignee: Shanghai Huaming Power Equipment Co Ltd; China Electric Power Research Institute Co Ltd CEPRI
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2021-11-02

Abstract

The application provides a quick mechanism of on-load tap-changer, includes: a base; the guide rail assembly is arranged on the base; the sliding box assembly is arranged on the guide rail assembly in a sliding mode, and the upper sliding box in the sliding box assembly slides to store energy and release the energy to drive the lower sliding box to slide rapidly; the eccentric transmission part is rotatably arranged on the upper sliding box and is used for connecting the driving device so as to drive the upper sliding box; the transmission shaft is in transmission connection with the lower sliding box, and the sliding of the lower sliding box drives the transmission shaft to rotate; and the limiting mechanism is arranged on the base and is respectively used for limiting the upper sliding box and the lower sliding box. Make the box that slides up reciprocating motion on guide rail assembly through eccentric driving medium, combine stop gear to the spacing effect of box that slides down for the box that slides down can remove fast when the energy storage of box that slides up releases, and the box that slides down and then drive the transmission shaft and rotate fast, and then the drive has the action of on-load tap-changer.

Description

Fast mechanism of on-load tap-changer

Technical Field

The invention belongs to the technical field of on-load tap-changers, and particularly relates to a quick mechanism of an on-load tap-changer.

Background

The on-load tap changer is used for voltage regulation of the transformer with load, and the purpose of regulating the output voltage of the transformer is further achieved by changing the turn ratio of the windings connected to a power grid. The switching core completes the driving of the process in a very short time, so that the on-load tap changer has a mechanism for quick release by utilizing the stored energy of the spring.

When the traditional on-load tap-changer realizes tap change, the eccentric wheel is driven by the aid of the electric mechanism to drive the upper sliding box to slide towards one end along the sliding rod, meanwhile, the lower sliding box is temporarily fixed, so that a spring between the upper sliding box and the lower sliding box is compressed to store energy, when the upper sliding box moves to a position close to a terminal point, the lower sliding box is released and rapidly moves along the sliding rod in the same direction with the upper sliding box under the action of the compression spring, and then the switching action of the change-over switch is driven. The quick linear motion of the lower sliding box drives a slide block switching mechanism to realize the conversion of rotary motion through a sliding chute fixed on the lower sliding box, and the slide block switching mechanism drives a central transmission shaft to rotate to operate an on-load tap-changer to finish the action. However, the traditional quick mechanism for realizing the switching action in the process has the problems of poor spring energy absorption effect, insufficient driving of the lower sliding box, inaccurate action and limiting time of the lower sliding box and the like.

Disclosure of Invention

In view of this, the present invention provides a fast mechanism for an on-load tap changer, so as to solve at least one technical problem of poor energy absorption effect of a spring, drive of a lower sliding box is not in place, and action and limiting time of the lower sliding box are not accurate.

The application provides a quick mechanism of on-load tap-changer, includes:

a base;

the guide rail assembly is arranged on the base;

the sliding box assembly is arranged on the guide rail assembly in a sliding mode, and the upper sliding box in the sliding box assembly slides to store energy and release the energy to drive the lower sliding box to slide rapidly;

the eccentric transmission part is rotatably arranged on the upper sliding box and is used for being connected with a driving device so as to drive the upper sliding box;

the transmission shaft is in transmission connection with the lower sliding box, and the sliding of the lower sliding box drives the transmission shaft to rotate;

and the limiting mechanisms are arranged on the base and are respectively used for limiting the upper sliding box and the lower sliding box.

Further, the rail assembly includes:

the two fixing plates are arranged in parallel relatively and are fixed on the base;

the slide bar, it is a plurality of the both ends of slide bar are connected respectively two on the fixed plate, and are a plurality of the equal parallel arrangement of slide bar, it is provided with to slide on the slide bar the smooth box subassembly.

Further, still include: a buffering energy-absorbing device;

the plurality of buffering energy-absorbing devices are respectively arranged on the fixing plates at the two ends of the guide rail assembly, and the plurality of buffering energy-absorbing devices are used for buffering and absorbing energy for the sliding box assembly.

Further, each of the energy absorption and buffering devices comprises:

a first limiting shoulder is arranged at a first end of the spring sleeve, a limiting key ring is arranged at a second end of the spring sleeve, the limiting key ring can be fixed on the spring sleeve, a fixing sleeve capable of sliding along the axial direction of the spring sleeve is arranged between the limiting shoulder on the spring sleeve and the limiting key ring, the fixing sleeve is used for being fixed on the fixing plate, a first hole and a second hole which are mutually communicated are formed in the spring sleeve along the axial direction of the spring sleeve, and the diameter of the first hole is larger than that of the second hole;

the spiral spring is arranged between the fixed sleeve on the spring sleeve and the limit shoulder;

a zigzag spring disposed in the first hole;

buffer beam, it stretches into in proper order sawtooth spring with the second hole, buffer beam's first end stretches out the second hole, buffer beam's second end is provided with its axial pintle of perpendicular to, buffer beam's second end is equipped with the spacing shoulder of second, the spacing shoulder of second is in stretch out under sawtooth spring's the shore effect spring housing's first hole.

Further, the slide bar in the guide rail assembly includes:

the upper sliding rods are provided with the upper sliding boxes in a sliding manner on at least two upper sliding rods,

and the lower sliding rods are provided with the lower sliding boxes in a sliding manner.

Further, the upper slide case includes:

the two ends of the upper frame body in the vertical direction are provided with upper flanges, and each upper flange extends towards the lower sliding box;

the spring seats are arranged on the upper sliding rods of the guide rail assembly in a sliding mode, two spring seats are arranged on each upper sliding rod, the two spring seats are arranged between the two flanges in a limited mode, an energy storage spring is arranged between the two spring seats, and the energy storage spring is sleeved on the upper sliding rods;

the two sliding blocks are symmetrically arranged on two sides of the upper frame body in the length direction, and the eccentric transmission part is arranged between the two sliding blocks;

and the upper limiting block is arranged on the upper frame body, and the upper limiting block and the limiting mechanism are arranged in a limiting way.

Further, the lower slide case includes:

the two ends of the lower frame body in the length direction are respectively provided with a lower flanging, each lower flanging extends towards the upper sliding box, and each lower flanging is arranged opposite to the corresponding upper flanging and is clamped on each spring seat;

the rack is fixed on the lower sliding box, the length direction of the rack is the same as that of the sliding rod, and the rack is meshed with the transmission shaft;

the lower limiting block is arranged on the lower frame body, the lower limiting block and the upper limiting block are arranged on the same side, and the lower limiting block and the limiting mechanism are arranged in a limiting mode.

Further, the propeller shaft includes:

a central shaft;

the bearing is sleeved on the central shaft and arranged on the base;

the gear is sleeved on the central shaft and meshed with the rack.

Further, stop gear includes:

the fixing piece is arranged on one side of the sliding box component on the base;

the two movable pieces are movably arranged on the fixed piece respectively, and are symmetrically arranged, and the two movable pieces can be clamped on the lower sliding box respectively;

the two rotating pieces are respectively and rotatably arranged on the first moving piece and the second moving piece, and can be respectively abutted against the upper sliding box;

wherein the content of the first and second substances,

the first ends of the two movable parts are respectively and rotatably arranged on the fixed part through a rotating shaft, and the second ends of the two movable parts are respectively connected to the fixed part through a connecting rod;

the first end of connecting rod is fixed on the mounting, the second end of connecting rod runs through the setting and is in on the moving part, just the second end tip of connecting rod is provided with a limiting plate, the mounting with between the moving part the cover is equipped with a compression spring on the connecting rod.

The positioning device is arranged between the upper sliding box and the lower sliding box and used for tightly pushing the lower sliding box to a proper position;

the positioning promoting device comprises:

the first end of the supporting arm is fixed on the transmission shaft, and the supporting arm is radially arranged on the transmission shaft;

the rotating wheel is rotatably arranged at the second end of the supporting arm;

when the supporting arm rotates to the length direction of the supporting arm and the movement direction of the lower sliding box are the same, the rotating wheel is abutted to at least one positioning piece in the lower sliding box, and two ends of the length direction in the lower sliding box are respectively provided with one positioning piece.

The application has the following beneficial effects:

the application provides a quick-operation mechanism of on-load tap-changer makes the box that slides up reciprocating motion on guide rail assembly through eccentric driving medium, combines stop gear to the spacing effect of box that slides down for the box that slides down can remove fast when the energy storage of box that slides up releases, and the box that slides down and then drive the quick rotation of transmission shaft, and then the drive is on-load tap-changer and is moved. The buffering energy-absorbing device plays a role in buffering energy-absorbing and has a good energy-absorbing effect. The positioning device can drive the lower sliding box to be in place. The two moving parts of the limiting mechanism ensure the accuracy of the gliding box and the limiting time.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 and 2 are schematic structural views of a snap action mechanism of an on-load tap changer according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a cushioning energy-absorbing device according to an embodiment of the present invention;

FIG. 4 is a schematic view of the half-section of FIG. 3;

FIG. 5 is a schematic structural view of the lower slide box provided by the embodiment of the invention, which is fixed at the leftmost end by the limiting mechanism;

FIG. 6 is a schematic structural diagram of a downward sliding box provided by an embodiment of the invention, wherein the rightmost end of the downward sliding box is fixed by a limiting mechanism;

FIG. 7 is a schematic view of the connection between the drive shaft and the lower slide magazine according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a positioning promotion device provided in accordance with an embodiment of the present invention;

FIG. 9 is a schematic top view of a spacing mechanism according to an alternative embodiment;

fig. 10 is an enlarged schematic view of the structure of the stopper mechanism in fig. 9. .

The device comprises a base 1, a sliding box assembly 2, an eccentric transmission member 3, a limiting mechanism 4, a guide rail assembly 5, a buffering energy absorption device 6, a transmission shaft 7, a supporting arm 8, a rotating wheel 9 and a positioning member 10;

11-fixed shaft, 12-rotating clamp, 13-cantilever, 14-rotating wheel, 15-adjusting component;

21-upper sliding box, 22-lower sliding box, 23-sliding block;

41-first moving part, 42-second moving part, 43-rotating part, 44-fixed part, 45-compression spring, 46-connecting rod;

51-a fixed plate, 52-an upper sliding rod and 53-a lower sliding rod;

61-spring bushing, 62-first limit shoulder, 63-limit key ring, 64-fixed sleeve, 65-coil spring, 66-buffer rod, 67-sawtooth spring, 68-second limit shoulder, 69-axle pin;

71-central shaft, 72-bearing, 73-gear;

211-an upper frame body, 212-an upper limiting block, 213-a spring seat and 214-an energy storage spring;

221-lower frame, 222-lower limit block, 223-rack.

Detailed Description

Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.

Referring to fig. 1 to 8, a snap action mechanism for an on-load tap changer comprises: a base 1; the guide rail assembly 5 is arranged on the base 1; the sliding box assembly 2 is arranged on the guide rail assembly 5 in a sliding manner, and an upper sliding box 21 in the sliding box assembly 2 slides to store energy and releases the energy to drive a lower sliding box 22 to slide rapidly; the eccentric transmission part 3 is rotatably arranged on the upper sliding box 21, and the eccentric transmission part 3 is used for being connected with a driving device so as to drive the upper sliding box 21; the transmission shaft 7 is in transmission connection with the lower sliding box 22, and the sliding of the lower sliding box 22 drives the transmission shaft 7 to rotate; and the limiting mechanisms 4 are arranged on the base 1, and the limiting mechanisms 4 are respectively used for limiting the upper sliding box 21 and the lower sliding box 22.

In this embodiment, the fast mechanism of the on-load tap-changer works on the principle that: the driving device drives the eccentric transmission member 3, so that the upper sliding box 21 can slide on the guide rail assembly 5 in a reciprocating manner, when the upper sliding box 21 slides to the leftmost end or the rightmost end on the guide rail assembly 5, the upper sliding box 21 stores the maximum energy, and when the upper sliding box 21 slides to the leftmost end or the rightmost end, the upper sliding box 21 triggers the limiting mechanism 4, so that the limiting mechanism 4 releases the limit on the lower sliding box 22, and under the action of the energy stored in the upper sliding box 21, the lower sliding box 22 rapidly slides towards the opposite end of the position where the lower sliding box 22 is located (for example, when the lower sliding box 22 is at the leftmost end, the rapid sliding towards the rightmost end is rapid), and the rapid sliding of the lower sliding box 22 enables the lower sliding box 22 to drive the transmission shaft 7 to rapidly rotate, so that the tapping action of the on-load tap-changer is realized.

In the present embodiment, referring to fig. 2, the rail assembly 5 includes: the fixing plates 51 are arranged in pairs, and the two fixing plates 51 are arranged oppositely and parallelly and are fixed on the base 1; the slide bar, it is a plurality of the both ends of slide bar are connected respectively two on the fixed plate 51, and are a plurality of the equal parallel arrangement of slide bar, it is provided with to slide on the slide bar slide box subassembly 2. The fixed plates 51 are arranged to play a supporting role so as to ensure the relative fixation of the slide bars, and the fixed plates 51 arranged at the two ends of the slide bars have a limiting role on the slide box assembly 2.

Referring to fig. 3 and 4, the snap action mechanism of the on-load tap changer further comprises: a buffering energy absorption device 6; the plurality of buffering energy-absorbing devices 6 are respectively arranged on the fixing plates 51 at the two ends of the guide rail assembly 5, and the plurality of buffering energy-absorbing devices 6 are used for buffering and absorbing energy for the slide box assembly 2. The buffer energy absorption device 6 plays a role in protecting the fixed plate 51 and the slide box assembly 2, and avoids strong impact caused by the high-speed slide box assembly 2.

Each of the buffer energy absorption devices 6 comprises: a spring sleeve 61, a first end of which is provided with a first limit shoulder 62, a second end of the spring sleeve 61 is provided with a limit key ring 63, the limit key ring 63 can be fixed on the spring sleeve 61, a fixing sleeve 64 capable of sliding along the axial direction of the spring sleeve 61 is arranged between the limit shoulder on the spring sleeve 61 and the limit key ring 63, the fixing sleeve 64 is used for being fixed on the fixing plate 51, the spring sleeve 61 is provided with a first hole and a second hole which are communicated with each other along the axial direction thereof, and the diameter of the first hole is larger than that of the second hole; a coil spring 65 disposed between the retaining sleeve 64 on the spring sleeve 61 and the retaining shoulder; a saw tooth spring 67 provided in the first hole; buffer rod 66, it stretches into in proper order sawtooth spring 67 with the second hole, the first end of buffer rod 66 stretches out the second hole, the second end of buffer rod 66 is provided with its axial axis of perpendicular to pin 69, the second end of buffer rod 66 is equipped with the spacing shoulder 68 of second, the spacing shoulder 68 of second is in stretch out under sawtooth spring 67's the back-up effect the first hole of spring sleeve 61.

Buffering energy-absorbing device 6 is installed on guide rail assembly 5's mounting 44 through fixed cover 64, wherein fixed cover 64 is fixed on mounting 44, buffer bar 66 is towards the inboard of smooth box subassembly 2, thereby, gliding box 22 contacts buffer bar 66 at first, make sawtooth spring 67 receive the compression, play the first grade cushioning effect, when the impact kinetic energy of gliding box 22 can not offset down in a small amount of compression of sawtooth spring 67, gliding box 22 can further contact the first spacing shoulder 62 of spring housing 61, and then compress coil spring 65, play the second grade cushioning effect, buffering energy-absorbing device 6 is through the two-stage buffering, thereby can be fine offset the impact kinetic energy that gliding box 22 high-speed motion brought down.

In an alternative embodiment, it should be understood that, when the lower slide box 22 contacts and impacts the buffering energy absorber 6, the coil spring 65 may be deformed to absorb energy, and then the zigzag spring 67 is compressed to deform to absorb energy, so as to absorb energy twice, thereby buffering the rapid impact of the lower slide box 22.

The slide bar in the guide rail assembly 5 includes: the upper sliding rods 52 are provided with the upper sliding boxes 21 in a sliding manner; the lower sliding rods 53 are provided with the lower sliding boxes 22 in a sliding manner on at least two of the lower sliding rods 53. Each sliding box slides on the two sliding rods, so that the stability of each sliding box during sliding is ensured.

Referring to fig. 5, 6 and 8, the upper slide case 21 includes: the upper frame body 211 is provided with upper flanges at two ends in the upper-degree direction, and each upper flange extends towards the lower sliding box 22; the spring seats 213 are slidably arranged on the upper sliding rods 52 of the guide rail assembly 5, two spring seats 213 are arranged on each upper sliding rod 52, the two spring seats 213 are both arranged between the two flanges in a limited manner, an energy storage spring 214 is arranged between the two spring seats 213, and the energy storage spring 214 is sleeved on the upper sliding rod 52; the two sliding blocks 23 are symmetrically arranged on two sides of the upper frame body 211 in the length direction, and the eccentric transmission part 3 is arranged between the two sliding blocks 23; and an upper limit block 212 that is provided on the upper frame 211, and the upper limit block 212 is provided to be limited by the limit mechanism 4.

The lower slide case 22 includes: the lower frame body 221 is provided with lower flanges at two ends in the length direction, each lower flange extends towards the upper slide box 21, and each lower flange is arranged opposite to the corresponding upper flange and is clamped on each spring seat 213; and a lower limiting block 222 disposed on the lower frame 221, wherein the lower limiting block 222 is disposed on the same side as the upper limiting block 212, and the lower limiting block 222 is disposed in a limiting manner with the limiting mechanism 4.

As will be appreciated by those skilled in the art, the downward turned edge and the upward turned edge are oppositely disposed and are engaged with the outer side of each spring seat 213, so that (for example) when the upper slide case 21 slides from the right end to the left end, the right turned edge of the upward turned edge pushes the right spring seat 213 and moves toward the left side. However, the lower slide box 22 is limited by the limiting mechanism 4 and cannot move, the left spring seat 213 is limited by the left flange of the lower flange, so that the lower slide box is fixed, the right spring seat 213 moves towards the left spring seat 213, so that the energy of the energy storage spring 214 is increased, when the upper slide box 21 slides to the leftmost end, the limiting mechanism 4 is triggered, the limiting mechanism 4 releases the limiting on the lower slide box 22, the lower slide box 22 slides towards the left side rapidly under the action of the energy storage spring 214 until the lower slide box 22 impacts the buffering energy absorber 6, and the lower slide box 22 is grabbed by the limiting mechanism 4 to limit and is fixed at the leftmost position.

Wherein, go up spacing piece 212 and spacing piece 222 down and all set up the intermediate position in last frame 211 one side, the length of spacing piece 222 is greater than the length of last spacing piece 212 down for when the box 21 that slides on is at leftmost end or rightmost end, go up spacing piece 212 and all push up and touch on stop gear 4, make stop gear 4 grab lower spacing piece 222 simultaneously, thereby it is fixed to slide the box 22 down.

Referring to fig. 5 and 6, the stopper mechanism 4 includes: a fixing member 44 disposed on the base 1 at one side of the slide cassette assembly 2; a first movable member 41 and a second movable member 42, both of which are movably disposed on the fixed member 44, and are symmetrically disposed, and both of which can be respectively clamped on the lower slide box 22; and the two rotating pieces 43 are respectively and rotatably arranged on the first movable piece 41 and the second movable piece 42, and the two rotating pieces 43 can be respectively abutted against the upper sliding box 21. The provision of the rotation member 43 has an advantage that friction when the rotation member 43 collides with the upper stopper 212 is reduced by the rotation characteristic, which is advantageous for protecting the structure and reducing the kinetic energy loss of the upper slide case 21.

First ends of the two movable members are respectively and rotatably arranged on the fixed member 44 through a rotating shaft, and second ends of the two movable members are respectively connected to the fixed member 44 through a connecting rod 46; the first end of connecting rod 46 is fixed on the mounting 44, the second end of connecting rod 46 runs through the setting and is in on the moving part, just the second end tip of connecting rod 46 is provided with a limiting plate, the mounting 44 with between the moving part the cover is equipped with a compression spring 45 on the connecting rod 46.

In the present embodiment, the first movable member 41 and the second movable member 42 can rotate a certain angle on the fixed member 44 under the action of the connecting rod 46 and the compression spring 45 on the connecting rod 46. In the actual working process, taking the slide box assembly 2 on the right side as an example for illustration, the upper limiting block 212 of the upper slide box 21 will contact the rotating component 43 on the second moving component 42, so as to rotate the second moving component 42, that is, the compression spring 45 will be further compressed, and the first moving component 41 will make the second section of the first moving component 41 be clamped on the left side of the lower limiting block 222 under the action of the compression spring 45, so as to clamp and fix the lower slide box 22 on the rightmost end of the slide rod. Similarly, when the upper sliding box 21 slides to the leftmost end to the left side, the upper limiting block 212 pushes the rotating member 43 on the first moving member 41, so that the first moving member 41 releases the limitation on the left side of the lower limiting block 222, and the lower sliding box 22 slides to the left side rapidly, when the sliding box slides to the leftmost end, the second moving member 42 slides the second moving member 42 down from the lower limiting block 222 under the elastic force of the compression spring 45 of the second moving member 42, so that the second moving member 42 limits the grabbing and clamping of the lower sliding box 22, and the lower sliding box 22 is fixed to the leftmost end of the sliding rod.

In this embodiment, two limiting mechanisms 4 are oppositely arranged, and the two limiting mechanisms 4 are respectively arranged on two opposite sides of the sliding box assembly 2 so as to limit the sliding box assembly 2.

In the present embodiment, referring to fig. 7, the propeller shaft 7 includes: a central shaft 71; a bearing 72 sleeved on the central shaft 71, wherein the bearing 72 is arranged on the base 1; a gear 73, which is sleeved on the central shaft 71, and the gear 73 is meshed with the rack 223. Specifically, the sliding of the lower slide case 22, i.e., the movement of the rack 223, causes the gear 73 to rotate, thereby causing the central shaft 71 to rotate.

In the present embodiment, referring to fig. 8, in order to ensure the driving of the lower slide box 22 to the proper position, a positioning device is provided between the upper slide box 21 and the lower slide box 22 for tightly pushing the lower slide box 22 to the proper position

The positioning promoting device comprises: a first end of the supporting arm 8 is fixed on the transmission shaft 7, and the supporting arm 8 is radially arranged on the transmission shaft 7; the rotating wheel 9 is rotatably arranged at the second end of the supporting arm 8; when the supporting arm 8 rotates to the same direction as the moving direction of the lower sliding box 22, the rotating wheel 9 is abutted against at least one positioning piece 10 in the lower sliding box 22, and two ends in the length direction in the lower sliding box 22 are respectively provided with one positioning piece 10. The supporting arm 8 ensures that the positioning piece 10 of the lower sliding box 22 is subjected to the rotating abutting action after the lower sliding box 22 rapidly reaches the leftmost side or the rightmost side, and ensures that the movable piece of the limiting mechanism 4 is positioned for catching the lower limiting block 222.

In an alternative embodiment, referring to fig. 9 and 10, each stop mechanism 4 comprises: a fixed shaft 11 provided on the base 1; the first ends of the two rotating clamps 12 are rotatably arranged on the fixed shaft 11, and the second ends of the two rotating frames are used for clamping hooks on the lower sliding box 22; the two cantilever arms 13 are respectively arranged on the two rotating clamps 12, and each cantilever arm 13 is respectively arranged towards the sliding box assembly 2; the slide box component 2 is arranged; the two rotating wheels 14 are respectively and rotatably arranged on one end of each cantilever 13 facing the sliding box assembly 2, and each rotating wheel 14 can be abutted against the upper sliding box 21; and adjusting assemblies 15 respectively arranged on the two cantilevers 13 and used for adjusting the distance between the two cantilevers 13. The two rotating clamps 12 can hook the lower sliding box card respectively to realize limiting, when the rotating wheels 14 on the two cantilevers 13 are impacted by the upper sliding box 21, the corresponding rotating clamps 12 are pushed to move, and when the adjusting assembly 15 arranged between the two rotating clamps 12 ensures that the two rotating clamps 12 rotate simultaneously, so that the lower sliding box 22 is limited.

As will be appreciated by those skilled in the art, a hook is provided at each second end of the rotating clamp 12 for hooking the slide down box 22. Adjusting part 15 comprises two buckle spare, realizes the regulation of the distance between the second end of two rotating clamp 12 through adjusting two buckle spare, the better spacing effect that realizes stop gear 4.

The application provides a quick-operation mechanism of on-load tap-changer makes smooth box 21 reciprocating motion on guide rail set spare 5 through eccentric driving medium 3, combines stop gear 4 to the spacing effect of gliding box 22 for gliding box 22 is when the energy storage of smooth box 21 is released down, and gliding box 22 can be quick removal, and gliding box 22 and then drive the quick rotation of transmission shaft 7, and then realizes the on-load tap-changer tapping motion. The buffering energy-absorbing device 6 plays a role in buffering energy absorption and has a good energy-absorbing effect. The positioning device is capable of driving the lower slide cassette 22 into position. The two moving parts of the limiting mechanism 4 ensure the accuracy of the lower slide box 22 and the limiting time.

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

Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention 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 of the invention may be made without departing from the scope of the invention.

Claims

1. A snap action mechanism for an on-load tap changer comprising:

a base;

the guide rail assembly is arranged on the base;

2. The on-load tap changer quick mechanism of claim 1, wherein the rail assembly comprises:

3. The on-load tap changer snap mechanism of claim 1 or 2, further comprising: a buffering energy-absorbing device;

4. The on-load tap changer speed mechanism of claim 3, wherein each said energy absorption buffer device comprises:

a zigzag spring disposed in the first hole;

5. The on-load tap changer speed mechanism of claim 2, wherein the slide bar in the rail assembly comprises:

6. The on-load tap changer snap mechanism of claim 5, wherein the upper slide box comprises:

7. The on-load tap changer snap mechanism of claim 6, wherein the lower slide box comprises:

8. The on-load tap changer quick mechanism of claim 7, wherein the drive shaft comprises:

a central shaft;

the bearing is sleeved on the central shaft and arranged on the base;

the gear is sleeved on the central shaft and meshed with the rack.

9. The on-load tap changer quick mechanism of claim 1, wherein the limit mechanism comprises:

10. The on-load tap changer quick mechanism of claim 1, further comprising a positioning device between the upper slide box and the lower slide box for urging the lower slide box into position;

the positioning promoting device comprises: