Quick mechanism of on-load tap-changer

Abstract

The present application provides a quick mechanism for an on-load tap-changer, including: a base; a guide rail assembly disposed on the base; a sliding box assembly slidably disposed on the guide rail assembly, wherein an upper sliding box in the sliding box assembly slides for energy storage and releases energy to drive a lower sliding box to slide quickly; an eccentric transmission member rotatably disposed on the upper sliding box, and the eccentric transmission member is used to connect a driving device to drive the upper sliding box; a transmission shaft in transmission connection with the lower sliding box, and the sliding of the lower sliding box drives the transmission shaft to rotate; a limiting mechanism disposed on the base, and the limiting mechanism is respectively used to limit the upper sliding box and the lower sliding box. Through the eccentric transmission member, the upper sliding box reciprocates on the guide rail assembly. Combining with the limiting effect of the limiting mechanism on the lower sliding box, when the upper sliding box stores and releases energy, the lower sliding box can move quickly, and the lower sliding box then drives the transmission shaft to rotate quickly, thereby driving the on-load tap-changer to actuate.

Description

Technical Field

[0001] The present 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 Art

[0002] An on-load tap-changer is used for regulating the voltage of a transformer under load. By changing the turn ratio of the winding connected to the power grid, the purpose of regulating the output voltage of the transformer is achieved. The switching core drives the above process in a very short time. Therefore, the on-load tap-changer has a mechanism that stores energy using a spring and then releases it quickly.

[0003] When a traditional on-load tap-changer realizes tap-changing, an electric mechanism drives an eccentric wheel to drive an upper sliding box to slide along a slide rod towards one end. At the same time, the lower sliding box is temporarily fixed, so that the spring between the upper and lower sliding boxes is compressed to store energy. When the upper sliding box moves close to the end position, the lower sliding box is released, and it moves quickly along the slide rod in the same direction as the upper sliding box under the action of the compressed spring, thereby driving the switching action of the switching switch. The quick linear motion of the lower sliding box drives a slider conversion mechanism fixed on the lower sliding box to realize the conversion of rotational motion, and the slider conversion mechanism drives the central transmission shaft to rotate, controlling the on-load tap-changer to complete the action. However, the traditional quick mechanism for realizing the switching action in this process has problems such as poor spring energy absorption effect, insufficient driving of the lower sliding box, and inaccurate moments of the action and limit of the lower sliding box. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a quick mechanism of an on-load tap-changer, thereby solving at least one technical problem such as poor spring energy absorption effect, insufficient driving of the lower sliding box, and inaccurate moments of the action and limit of the lower sliding box.

[0005] The present application provides a quick mechanism of an on-load tap-changer, including:

[0006] A base;

[0007] A guide rail assembly, which is arranged on the base;

[0008] A sliding box assembly, which is slidably arranged on the guide rail assembly. In the sliding box assembly, the upper sliding box slides to store energy and release energy to drive the lower sliding box to slide quickly;

[0009] An eccentric transmission member, which is rotatably arranged on the upper sliding box. The eccentric transmission member is used to connect a driving device to drive the upper sliding box;

[0010] A transmission shaft, which is in transmission connection with the lower sliding box. The sliding of the lower sliding box drives the transmission shaft to rotate;

[0011] A limiting mechanism is provided on the base, and the limiting mechanism is respectively used to limit the upper sliding box and the lower sliding box.

[0012] Further, the guide rail assembly includes:

[0013] A pair of fixed plates are arranged in parallel relative to each other, and both of the fixed plates are fixed on the base;

[0014] Slide rods, both ends of multiple slide rods are respectively connected to the two fixed plates, and multiple slide rods are all arranged in parallel. The slide box assembly is slidably arranged on the slide rods.

[0015] Further, it further includes: a buffer energy absorption device;

[0016] Multiple buffer energy absorption devices are respectively arranged on the fixed plates at both ends of the guide rail assembly, and multiple buffer energy absorption devices are used to buffer and absorb energy of the slide box assembly.

[0017] Further, each buffer energy absorption device includes:

[0018] A spring sleeve, a first limiting shoulder is arranged at the first end of the spring sleeve, a limiting key ring is arranged at the 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 to be fixed on the fixed plate, a first hole and a second hole which are communicated with each other are axially opened on the spring sleeve, and the diameter of the first hole is larger than that of the second hole;

[0019] A helical spring is arranged between the fixing sleeve on the spring sleeve and the limiting shoulder;

[0020] A serrated spring is arranged in the first hole;

[0021] A buffer rod sequentially extends into the serrated spring and the second hole, the first end of the buffer rod extends out of the second hole, a pin perpendicular to its axial direction is arranged at the second end of the buffer rod, and a second limiting shoulder is arranged at the second end of the buffer rod. The second limiting shoulder extends out of the first hole of the spring sleeve under the top support of the serrated spring.

[0022] Further, the slide rods in the guide rail assembly include:

[0023] Upper slide rods, the upper sliding box is slidably arranged on at least two upper slide rods,

[0024] Lower slide rods, the lower sliding box is slidably arranged on at least two lower slide rods.

[0025] Further, the upper sliding box includes:

[0026] An upper frame body, with upper flanges provided at both ends in its height direction, and each of the upper flanges extends towards the lower sliding box;

[0027] Spring seats, which are slidably arranged on the upper sliding rods of the guide rail assembly. Two spring seats are arranged on each upper sliding rod. The two spring seats are both restricted between the two flanges. An energy storage spring is arranged between the two spring seats, and the energy storage spring is sleeved on the upper sliding rod;

[0028] Sliders, two of which are symmetrically arranged on both sides in the length direction of the upper frame body, and the eccentric drive member is arranged between the two sliders;

[0029] An upper limit block, which is arranged on the upper frame body, and the upper limit block is limit - arranged with the limit mechanism.

[0030] Further, the lower sliding box includes:

[0031] A lower frame body, with lower flanges provided at both ends in its length direction, and each of the lower flanges extends towards the upper sliding box. Each of the lower flanges is arranged opposite to the corresponding upper flange and is used to be clamped on each of the spring seats;

[0032] A rack, which is fixed on the lower sliding box. The length direction of the rack is the same as the length direction of the sliding rod, and the rack meshes with the transmission shaft;

[0033] A lower limit block, which is arranged on the lower frame body. The lower limit block and the upper limit block are on the same side, and the lower limit block is limit - arranged with the limit mechanism.

[0034] Further, the transmission shaft includes:

[0035] A central shaft;

[0036] Bearings, which are sleeved on the central shaft, and the bearings are arranged on the base;

[0037] Gears, which are sleeved on the central shaft, and the gears mesh with the rack.

[0038] Further, the limit mechanism includes:

[0039] A fixing member, which is arranged on one side of the sliding box assembly on the base;

[0040] A first movable member and a second movable member. The two movable members are respectively movably arranged on the fixing member. The two movable members are symmetrically arranged, and the two movable members can respectively be clamped on the lower sliding box;

[0041] Rotating members, two of the rotating members are respectively rotatably arranged on the first movable member and the second movable member, and the two rotating members can respectively abut against the upper sliding box;

[0042] Among them,

[0043] The first ends of the two movable members are respectively rotatably arranged on the fixing member through a rotating shaft, and the second ends of the two movable members are respectively connected to the fixing member through a connecting rod;

[0044] The first end of the connecting rod is fixed on the fixing member, the second end of the connecting rod penetrates through the movable member, and a limiting plate is arranged at the end of the second end of the connecting rod. A compression spring is sleeved on the connecting rod between the fixing member and the movable member.

[0045] Furthermore, a positioning promoting device is further included. The positioning promoting device is between the upper sliding box and the lower sliding box and is used for tightly pressing the lower sliding box in place;

[0046] The positioning promoting device includes:

[0047] A support arm, the first end of which is fixed on the transmission shaft, and the support arm is radially arranged on the transmission shaft;

[0048] A runner, which is rotatably arranged at the second end of the support arm;

[0049] Among them, when the support arm rotates to the direction of its length being the same as the movement direction of the lower sliding box, the runner abuts against at least one positioning member in the lower sliding box, and one of the positioning members is arranged at each of the two ends of the lower sliding box in the length direction.

[0050] The beneficial effects of the present application are:

[0051] The quick mechanism of the on-load tap-changer provided by the present application enables the upper sliding box to reciprocate on the guide rail assembly through the eccentric transmission member. Combining with the limiting effect of the limiting mechanism on the lower sliding box, when the energy storage of the upper sliding box is released, the lower sliding box can move quickly, and the lower sliding box then drives the transmission shaft to rotate quickly, thereby driving the on-load tap-changer to act. The buffer energy absorption device plays a role in buffering and energy absorption, and the energy absorption effect is good. The positioning promoting device can make the lower sliding box be driven in place. The two movable members of the limiting mechanism ensure the problem of accurate positioning of the lower sliding box at all times. Description of the Drawings

[0052] Through the following description of the embodiments of the present invention with reference to the drawings, the above and other objects, features and advantages of the present invention will become clearer.

[0053] Figure 1 and Figure 2It is a schematic structural diagram of a quick mechanism of an on-load tap-changer according to an embodiment of the present invention;

[0054] Figure 3 It is a schematic structural diagram of a buffer energy absorption device according to an embodiment of the present invention;

[0055] Figure 4 is Figure 3 the half-sectional structural diagram in

[0056] Figure 5 It is a schematic structural diagram of a lower slide box fixed by a limiting mechanism at the leftmost end according to an embodiment of the present invention;

[0057] Figure 6 It is a schematic structural diagram of a lower slide box fixed by a limiting mechanism at the rightmost end according to an embodiment of the present invention;

[0058] Figure 7 It is a schematic diagram of the connection relationship between a transmission shaft and a lower slide box according to an embodiment of the present invention;

[0059] Figure 8 It is a schematic structural diagram of a promoting positioning device according to an embodiment of the present invention;

[0060] Figure 9 It is a top view structural schematic diagram of a limiting mechanism provided by an optional embodiment;

[0061] Figure 10 is Figure 9 the enlarged structural schematic diagram of the limiting mechanism in

[0062] Wherein, 1 - base, 2 - slide box assembly, 3 - eccentric drive member, 4 - limiting mechanism, 5 - guide rail assembly, 6 - buffer energy absorption device, 7 - transmission shaft, 8 - support arm, 9 - runner, 10 - positioning member;

[0063] 11 - fixed shaft, 12 - rotating clamp, 13 - cantilever, 14 - rotating wheel, 15 - adjusting assembly;

[0064] 21 - upper slide box, 22 - lower slide box, 23 - slider;

[0065] 41 - first movable member, 42 - second movable member, 43 - rotating member, 44 - fixed member, 45 - compression spring, 46 - connecting rod;

[0066] 51 - fixing plate, 52 - upper slide rod, 53 - lower slide rod;

[0067] 61 - spring sleeve, 62 - first limiting shoulder, 63 - limiting key ring, 64 - fixing sleeve, 65 - helical spring, 66 - buffer rod, 67 - serrated spring, 68 - second limiting shoulder, 69 - shaft pin;

[0068] 71 - Central axis, 72 - Bearing, 73 - Gear;

[0069] 211 - Upper housing, 212 - Upper limit block, 213 - Spring seat, 214 - Energy storage spring;

[0070] 221 - Lower housing, 222 - Lower limit block, 223 - Rack. Detailed implementation mode

[0071] The various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. In each of the drawings, the same elements are denoted by the same or similar reference numerals. For the sake of clarity, the various parts in the drawings are not drawn to scale.

[0072] Reference Figures 1 to 8 , a quick mechanism of an on - load tap - changer, comprising: a base 1; a guide rail assembly 5 provided on the base 1; a sliding box assembly 2 slidably disposed on the guide rail assembly 5, in which an upper sliding box 21 in the sliding box assembly 2 slides to store energy and releases energy to drive a lower sliding box 22 to slide quickly; an eccentric transmission member 3 rotatably disposed on the upper sliding box 21, the eccentric transmission member 3 being used to connect to a driving device to drive the upper sliding box 21; a transmission shaft 7 drivingly connected to the lower sliding box 22, the sliding of the lower sliding box 22 driving the transmission shaft 7 to rotate; a limiting mechanism 4 provided on the base 1, the limiting mechanism 4 being respectively used to limit the upper sliding box 21 and the lower sliding box 22.

[0073] In this embodiment, the working principle of the quick mechanism of the on - load tap - changer is as follows: The driving device drives the eccentric transmission member 3, so that the upper sliding box 21 can reciprocally slide on the guide rail assembly 5. When the upper sliding box 21 slides to the leftmost or 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 or 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. Under the action of the energy stored in the upper sliding box 21, the lower sliding box 22 quickly slides towards the relative 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, it quickly slides towards the rightmost end). The quick sliding of the lower sliding box 22 causes it to drive the transmission shaft 7 to rotate quickly, thereby realizing the tap - changing action of the on - load tap - changer.

[0074] In this embodiment, reference Figure 2, the guide rail assembly 5 includes: a pair of fixed plates 51 arranged in parallel, the two fixed plates 51 are arranged relatively parallel to each other and are both fixed on the base 1; slide rods, both ends of the multiple slide rods are respectively connected to the two fixed plates 51, and the multiple slide rods are all arranged in parallel, and the slide box assembly 2 is slidably arranged on the slide rods. The arranged fixed plates 51 play a supporting role, thus ensuring the relative fixation of each slide rod, and the fixed plates 51 arranged at both ends of each slide rod play a limiting role on the slide box assembly 2.

[0075] Reference Figure 3 and Figure 4 , the quick mechanism of the on-load tap-changer further includes: a buffer energy absorption device 6; the multiple buffer energy absorption devices 6 are respectively arranged on the fixed plates 51 at both ends of the guide rail assembly 5, and the multiple buffer energy absorption devices 6 are used for buffering and absorbing energy of 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, avoiding strong impacts caused by the high-speed slide box assembly 2.

[0076] Each buffer energy absorption device 6 includes: a spring sleeve 61, a first limiting shoulder 62 is arranged at its first end, a limiting key ring 63 is arranged at the second end of the spring sleeve 61, the limiting key ring 63 can be fixed on the spring sleeve 61, a fixing sleeve 64 that can slide along the axial direction of the spring sleeve 61 is arranged between the limiting shoulder on the spring sleeve 61 and the limiting key ring 63, the fixing sleeve 64 is used for fixing on the fixed plate 51, a first hole and a second hole that communicate with each other are axially formed in the spring sleeve 61, and the diameter of the first hole is larger than that of the second hole; a helical spring 65, which is arranged between the fixing sleeve 64 on the spring sleeve 61 and the limiting shoulder; a serrated spring 67, which is arranged in the first hole; a buffer rod 66, which sequentially extends into the serrated spring 67 and the second hole, the first end of the buffer rod 66 extends out of the second hole, a shaft pin 69 perpendicular to its axial direction is arranged at the second end of the buffer rod 66, and a second limiting shoulder 68 is arranged at the second end of the buffer rod 66, and the second limiting shoulder 68 extends out of the first hole of the spring sleeve 61 under the top support of the serrated spring 67.

[0077] The buffer energy absorption device 6 is installed on the fixing member 44 of the guide rail assembly 5 through the fixing sleeve 64, wherein the fixing sleeve 64 is fixed on the fixing member 44, and the buffer rod 66 faces the inner side of the sliding box assembly 2. Thus, the lower sliding box 22 first contacts the buffer rod 66, causing the serrated spring 67 to be compressed, playing a primary buffering role. When the small compression of the serrated spring 67 cannot offset the impact kinetic energy of the lower sliding box 22, the lower sliding box 22 will further contact the first limiting shoulder 62 of the spring sleeve 61, and then compress the helical spring 65, playing a secondary buffering role. The buffer energy absorption device 6 can well offset the impact kinetic energy brought by the high-speed movement of the lower sliding box 22 through two-stage buffering.

[0078] In an alternative embodiment, it should be understood that when the lower sliding box 22 contacts and impacts the buffer energy absorption device 6, the helical spring 65 can be deformed and absorb energy first, and then the serrated spring 67 can be compressed and deformed to absorb energy. Through the two energy absorptions, the rapid impact of the lower sliding box 22 can be buffered.

[0079] The sliding rods in the guide rail assembly 5 include: an upper sliding rod 52, and at least two upper sliding boxes 21 are slidably arranged on each of the upper sliding rods 52; a lower sliding rod 53, and at least two lower sliding boxes 22 are slidably arranged on each of the lower sliding rods 53. Each sliding box slides on two sliding rods, ensuring the stability of each sliding box during sliding.

[0080] Reference Figure 5 、 Figure 6 and Figure 8 The upper sliding box 21 includes: an upper frame body 211, and upper flanges are arranged at both ends in the length direction thereof, and each of the upper flanges extends towards the lower sliding box 22; a spring seat 213, which is slidably arranged on the upper sliding rod 52 of the guide rail assembly 5, and two spring seats 213 are arranged on each upper sliding rod 52, and the two spring seats 213 are both limited between the two flanges, and 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; two sliders 23, which are symmetrically arranged on both sides in the length direction of the upper frame body 211, and the eccentric transmission member 3 is arranged between the two sliders 23; an upper limit block 212, which is arranged on the upper frame body 211, and the upper limit block 212 is limitedly arranged with the limiting mechanism 4.

[0081] The lower sliding box 22 includes: a lower frame body 221, and lower flanges are arranged at both ends in the length direction thereof, and each of the lower flanges extends towards the upper sliding box 21, and each of the lower flanges is arranged opposite to the corresponding upper flange and is used for being clamped on each of the spring seats 213; a lower limit block 222, which is arranged on the lower frame body 221, and the lower limit block 222 and the upper limit block 212 are arranged on the same side, and the lower limit block 222 is limitedly arranged with the limiting mechanism 4.

[0082] Those skilled in the art should understand that the lower flanging and the upper flanging are arranged oppositely and are both clamped on the outer parts of the respective spring seats 213. Thus, (by way of example), when the upper sliding box 21 slides from the right end to the left end, the right flanging of the upper flanging will push the right spring seat 213 and move towards the left. However, the lower sliding box 22 is restricted by the limiting mechanism 4 and will not move. The left spring seat 213 will be restricted by the left flanging of the lower flanging and thus remains stationary, while the right spring seat 213 moves towards the left spring seat 213, thereby increasing the energy of the energy storage spring 214. When the upper sliding box 21 slides to the leftmost end, the limiting mechanism 4 is triggered, and the limiting mechanism 4 releases the limitation on the lower sliding box 22. Under the action of the energy storage spring 214, the lower sliding box 22 quickly slides towards the left until the lower sliding box 22 impacts the buffer energy absorption device 6, and the lower sliding box 22 is grabbed and limited by the limiting mechanism 4 and fixed at the leftmost position.

[0083] Among them, the upper limiting block 212 and the lower limiting block 222 are both arranged at the middle position on one side of the upper frame body 211. The length of the lower limiting block 222 is greater than that of the upper limiting block 212, so that when the upper sliding box 21 is at the leftmost or rightmost end, the upper limiting block 212 abuts against the limiting mechanism 4, and at the same time, the limiting mechanism 4 grabs the lower limiting block 222, thereby fixing the lower sliding box 22.

[0084] Reference Figure 5 and Figure 6 The limiting mechanism 4 includes: a fixing member 44, which is arranged on one side of the sliding box assembly 2 on the base 1; a first movable member 41 and a second movable member 42, the two movable members are respectively movably arranged on the fixing member 44, the two movable members are symmetrically arranged, and the two movable members can respectively be clamped on the lower sliding box 22; a rotating member 43, the two rotating members 43 are respectively rotatably arranged on the first movable member 41 and the second movable member 42, and the two rotating members 43 can respectively abut against the upper sliding box 21. The advantage of setting the rotating member 43 is that, due to the rotating characteristic, the friction when the rotating member 43 collides with the upper limiting block 212 is reduced, which is beneficial to protecting the structure and reducing the kinetic energy loss of the upper sliding box 21.

[0085] The first ends of the two movable members are respectively rotatably arranged on the fixing member 44 via a rotating shaft, and the second ends of the two movable members are respectively connected to the fixing member 44 via a connecting rod 46; the first end of the connecting rod 46 is fixed on the fixing member 44, the second end of the connecting rod 46 penetrates through the movable member, and a limiting plate is arranged at the end of the second end of the connecting rod 46. A compression spring 45 is sleeved on the connecting rod 46 between the fixing member 44 and the movable member.

[0086] In this embodiment, under the action of the connecting rod 46 and the compression spring 45 on the connecting rod 46, the first movable member 41 and the second movable member 42 can both generate a certain rotation angle on the fixed member 44. During the actual working process, taking the case where the sliding box assembly 2 is on the right side as an example, the upper limit block 212 of the upper sliding box 21 will abut against the rotating member 43 on the second movable member 42, so that the second movable member 42 rotates, that is, the compression spring 45 will be further compressed. At this time, the first movable member 41 will, under the action of the compression spring 45, make the second section of the first movable member 41 be clamped on the left side of the lower limit block 222, thereby clamping and fixing the lower sliding box 22 at the rightmost end of the sliding rod. Similarly, when the upper sliding box 21 slides to the leftmost end, the upper limit block 212 will push the rotating member 43 on the first movable member 41, so that the first movable member 41 releases the limit on the left side of the lower limit block 222, and the lower sliding box 22 will quickly slide towards the left side. When it slides to the leftmost end, the second movable member 42 will slide off the lower limit block 222 under the elastic force of its own compression spring 45, so that the second movable member 42 grabs and limits the lower sliding box 22, and the lower sliding box 22 is fixed at the leftmost end of the sliding rod.

[0087] In this embodiment, two limiting mechanisms 4 are oppositely arranged, and the two limiting mechanisms 4 are respectively arranged on the opposite sides of the sliding box assembly 2 to limit the sliding box assembly 2.

[0088] In this embodiment, referring to Figure 7 , the transmission shaft 7 includes: a central shaft 71; a bearing 72 sleeved on the central shaft 71, and the bearing 72 is arranged on the base 1; a gear 73 sleeved on the central shaft 71, and the gear 73 meshes with the rack 223. Specifically, through the sliding of the lower sliding box 22, that is, the movement of the rack 223, the rotation of the gear 73 is driven, thereby driving the rotation of the central shaft 71.

[0089] In this embodiment, referring to Figure 8 , in order to ensure the problem of the driving in place of the lower sliding box 22, a promoting positioning device is provided. The promoting positioning device is between the upper sliding box 21 and the lower sliding box 22 and is used to push the lower sliding box 22 tightly in place.

[0090] The positioning promoting device includes: a support arm 8, the first end of which is fixed on the transmission shaft 7, and the support arm 8 is radially arranged on the transmission shaft 7; a runner 9, which is rotatably arranged at the second end of the support arm 8; wherein, when the support arm 8 rotates to make its length direction the same as the movement direction of the sliding box 22, the runner 9 abuts against at least one positioning member 10 in the sliding box 22, and one positioning member 10 is respectively arranged at both ends of the sliding box 22 in the length direction. By providing the support arm 8, it is ensured that after the sliding box 22 quickly reaches the leftmost or rightmost side, the positioning member 10 of the sliding box 22 is subjected to the rotational abutting action, ensuring the clamping and positioning of the movable part of the limiting mechanism 4 on the lower limiting block 222.

[0091] In an alternative embodiment, referring to Figure 9 and Figure 10 , each limiting mechanism 4 includes: a fixed shaft 11, which is arranged on the base 1; a rotating clamp 12, 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 hooking on the sliding box 22; a cantilever 13, the two cantilevers 13 are respectively arranged on the two rotating clamps 12, and each cantilever 13 faces the sliding box assembly 2; a sliding box assembly 2 is arranged; a rotating wheel 14, the two rotating wheels 14 are respectively rotatably arranged at one ends of the respective cantilevers 13 facing the sliding box assembly 2, and each rotating wheel 14 can abut against the upper sliding box 21; an adjusting assembly 15, which is respectively arranged on the two cantilevers 13 and is used for adjusting the distance between the two cantilevers 13. The two rotating clamps 12 can respectively hook the sliding box to achieve limiting. When the rotating wheels 14 on the two cantilevers 13 are impacted by the upper sliding box 21, they push the corresponding rotating clamps 12 to move. When the adjusting assembly 15 arranged between the two rotating clamps 12 ensures that the two rotating clamps 12 rotate simultaneously, thereby realizing the limiting of the sliding box 22.

[0092] As those skilled in the art should understand, a hook is arranged at the second end of each rotating clamp 12 for hooking the sliding box 22. The adjusting assembly 15 is composed of two buckle members, and the distance between the second ends of the two rotating clamps 12 is adjusted by adjusting the two buckle members, better realizing the limiting effect of the limiting mechanism 4.

[0093] The quick mechanism of the on-load tap-changer provided by the present application enables the upper sliding box 21 to reciprocate on the guide rail assembly 5 through the eccentric drive member 3. Combining the limiting effect of the limiting mechanism 4 on the lower sliding box 22, when the energy storage of the upper sliding box 21 is released, the lower sliding box 22 can move quickly, and the lower sliding box 22 then drives the transmission shaft 7 to rotate quickly, thereby realizing the tap-changing action of the on-load tap-changer. The buffer energy absorption device 6 plays a role in buffering and energy absorption, and has a good energy absorption effect. The positioning promoting device can make the lower sliding box 22 drive in place. The two moving parts of the limiting mechanism 4 ensure the accurate problem of the lower sliding box 22 and the limiting moment.

[0094] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0095] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly illustrating the present invention, and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. The obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A quick mechanism for an on-load tap-changer, characterized in that, it includes: a base; a guide rail assembly disposed on the base; a sliding box assembly slidably disposed on the guide rail assembly, and in the sliding box assembly, the upper sliding box slides for energy storage and releases energy to drive the lower sliding box to slide quickly; an eccentric transmission member rotatably disposed on the upper sliding box, and the eccentric transmission member is used to connect to a driving device to drive the upper sliding box; a transmission shaft drivingly connected to the lower sliding box, and the sliding of the lower sliding box drives the transmission shaft to rotate; a limiting mechanism disposed on the base, and the limiting mechanism is respectively used to limit the upper sliding box and the lower sliding box; the limiting mechanism includes: a fixing member disposed on one side of the sliding box assembly on the base; a first movable member and a second movable member, and the two movable members are respectively movably disposed on the fixing member, the two movable members are symmetrically arranged, and the two movable members can respectively be clamped on the lower sliding box; rotating members, and the two rotating members are respectively rotatably disposed on the first movable member and the second movable member, and the two rotating members can respectively abut against the upper sliding box; wherein, the first ends of the two movable members are respectively rotatably disposed on the fixing member via a rotating shaft, and the second ends of the two movable members are respectively connected to the fixing member via a connecting rod; the first end of the connecting rod is fixed to the fixing member, the second end of the connecting rod penetrates through the movable member, and a limiting plate is provided at the end of the second end of the connecting rod, and a compression spring is sleeved on the connecting rod between the fixing member and the movable member.

2. The quick mechanism for an on-load tap-changer according to claim 1, characterized in that, the guide rail assembly includes: a pair of fixed plates arranged in parallel, the two fixed plates are arranged opposite to each other in parallel and are both fixed on the base; slide bars, and both ends of the plurality of slide bars are respectively connected to the two fixed plates, and the plurality of slide bars are all arranged in parallel, and the sliding box assembly is slidably disposed on the slide bars.

3. The quick mechanism for an on-load tap-changer according to claim 1 or 2, characterized in that, it further includes: a buffer energy absorption device; a plurality of the buffer energy absorption devices are respectively disposed on the fixed plates at both ends of the guide rail assembly, and the plurality of buffer energy absorption devices are used to buffer and absorb energy of the sliding box assembly.

4. The quick mechanism for an on-load tap-changer according to claim 3, characterized in that, each of the buffer energy absorption devices all includes: a spring sleeve, a first limiting shoulder is provided at the first end of the spring sleeve, a limiting key ring is provided at the 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 provided between the limiting shoulder on the spring sleeve and the limiting key ring, the fixing sleeve is used to be fixed on the fixed plate a spiral spring disposed between the fixing sleeve on the spring sleeve and the limiting shoulder; a serrated spring disposed in the first hole; ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The buffer rod extends into the serrated spring and the second hole in sequence. The first end of the buffer rod extends out of the second hole. A shaft pin perpendicular to its axial direction is provided at the second end of the buffer rod. A second limiting shoulder is provided at the second end of the buffer rod. The second limiting shoulder extends out of the first hole of the spring sleeve under the propping action of the serrated spring.

5. The quick mechanism of the on-load tap-changer according to claim 2, characterized in that the sliding rod in the guide rail assembly includes: an upper sliding rod, and the upper sliding box is slidably arranged on at least two of the upper sliding rods, a lower sliding rod, and the lower sliding box is slidably arranged on at least two of the lower sliding rods.

6. The quick mechanism of the on-load tap-changer according to claim 5, characterized in that the upper sliding box includes: an upper frame body, and upper flanges are provided at both ends in the width direction thereof, and each of the upper flanges extends towards the lower sliding box; a spring seat, which is slidably arranged on the upper sliding rod of the guide rail assembly. Two spring seats are arranged on each upper sliding rod, both of the two spring seats are limited between the two flanges. A storage spring is arranged between the two spring seats, and the storage spring is sleeved on the upper sliding rod; a slider, and the two sliders are symmetrically arranged on both sides in the length direction of the upper frame body. The eccentric transmission member is arranged between the two sliders; an upper limiting block, which is arranged on the upper frame body, and the upper limiting block is limitedly arranged with the limiting mechanism.

7. The quick mechanism of the on-load tap-changer according to claim 6, characterized in that the lower sliding box includes: a lower frame body, and lower flanges are provided at both ends in the length direction thereof, and each of the lower flanges extends towards the upper sliding box, and each of the lower flanges is arranged opposite to the corresponding upper flange and is used for being clamped on each spring seat; a rack, which is fixed on the lower sliding box. The length direction of the rack is the same as the length direction of the sliding rod, and the rack meshes with the transmission shaft; a lower limiting block, which 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 is limitedly arranged with the limiting mechanism.

8. The quick mechanism of the on-load tap-changer according to claim 7, characterized in that the transmission shaft includes: a central shaft; a bearing, which is sleeved on the central shaft, and the bearing is arranged on the base; a gear, which is sleeved on the central shaft, and the gear meshes with the rack.

9. The quick mechanism of the on-load tap-changer according to claim 1, characterized in that a promoting and positioning device is further included, the promoting and positioning device is between the upper sliding box and the lower sliding box and is used for tightly pressing the lower sliding box in place; the promoting and positioning device includes: a support arm, the first end of which is fixed on the transmission shaft, and the support arm is radially arranged on the transmission shaft; a runner, which is rotatably arranged at the second end of the support arm; wherein, when the support arm rotates to the direction of its length being the same as the movement direction of the lower sliding box, the runner abuts against at least one positioning member in the lower sliding box, and one positioning member is respectively arranged at both ends in the length direction of the lower sliding box.

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