Opposed slide box type quick mechanism of on-load tap changer

Abstract

The application provides a quick mechanism of a load tap changer, which comprises a base, two groups of slide box type energy storage and release components symmetrically arranged on the base and used for synchronous reverse movement to store energy and release energy, a transmission input component connected with power input ends of the slide box type energy storage and release components, and a power output component connected with power output ends of the slide box type energy storage and release components. The two groups of slide box type energy storage and release components are symmetrically arranged, so that the movement directions of the two groups of slide box type energy storage and release components are opposite, and when the two groups of slide box type energy storage and release components release energy, the impact forces can be partially offset, the one-way impact force in the switching moment is reduced, the impact vibration is reduced, the switching failure rate of the load tap changer caused by the vibration is reduced, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of on-load tap changer technology, and more specifically, to an opposing slide-type quick mechanism for an on-load tap changer. Background Technology

[0002] On-load tap changers are used for voltage regulation of transformers under load. The voltage regulation mechanism needs to complete the voltage regulation switching in a very short time. Therefore, the on-load tap changer has a mechanism that uses spring energy storage for rapid release to complete the step-like switching action. A single working process is divided into an energy storage stroke and a release stroke. Each time it is released, the direction of the output rotation is opposite to the direction of the previous release.

[0003] Traditional quick-release mechanisms use a single sliding box mechanism for energy storage and release. The input mechanism drives the upper sliding box to slide to one end. During this sliding, the lower sliding box is temporarily fixed, and a spring between the upper and lower boxes is compressed to store energy. When the upper sliding box approaches its end position, the temporary fixation of the lower sliding box is released. Under the action of the compressed spring, the lower sliding box moves rapidly along the guide component. This movement, via a rack mounted on the lower sliding box, drives the gears of the output mechanism, outputting rotational motion and completing the switching action of the changeover switch. Because the switching action is completed rapidly, the lower sliding box moves at high speed and brakes momentarily at the end of the energy storage and release process. This results in a significant unidirectional impact on the quick-release mechanism. In practical applications, this impact can cause problems such as momentary vibration and breakage of the changeover switch contacts, fastener detachment, and failure of the lower sliding box locking mechanism. Summary of the Invention

[0004] In view of this, the present invention proposes an opposed sliding box type fast mechanism for on-load tap changers, which aims to solve the problem that the existing single sliding box mechanism will brake instantaneously at the end of energy storage release, resulting in a large unidirectional impact on the fast mechanism.

[0005] This invention proposes a fast-acting mechanism for an on-load tap changer, comprising: a base; two sets of sliding-box energy storage and release components symmetrically arranged on the base for synchronous reverse movement to store and release energy; a transmission input component connected to the power input end of the sliding-box energy storage and release components for connecting a drive mechanism to drive the sliding-box energy storage and release components to store energy; and a power output component connected to the power output end of the sliding-box energy storage and release components for movement under the action of the power output end of the sliding-box energy storage and release components to output motion and realize the fast-acting switching of the on-load tap changer.

[0006] Furthermore, in the aforementioned on-load tap changer with opposing sliding box type quick mechanism, the sliding box type energy storage and release component includes: an upper sliding box, a lower sliding box, and an energy storage spring; wherein, the upper sliding box is disposed above the lower sliding box, and both the upper sliding box and the lower sliding box are slidably disposed on the base; the energy storage spring is disposed between the upper sliding box and the lower sliding box, and when the upper sliding box slides away from the lower sliding box under the action of the transmission input component, the energy storage spring stores energy, and the energy storage spring can release energy after the upper sliding box slides into place, so that the lower sliding box slides towards the upper sliding box, thereby driving the power output component to perform motion output.

[0007] Furthermore, in the aforementioned on-load tap changer's opposing sliding box type quick mechanism, the base is provided with paired sliding box gripping members, which correspond to the sliding box. The sliding box is provided with a sliding box locking protrusion, and the two sliding box gripping members are spaced apart at the sliding box locking protrusion, respectively gripping the end of the sliding box locking protrusion to limit the sliding box, allowing the upper sliding box to slide away from the sliding box. Each sliding box gripping member is provided with a sliding box release trigger, which releases the gripping of the sliding box when the upper sliding box slides into place, allowing the sliding box to slide towards the upper sliding box under the action of the energy storage spring.

[0008] Furthermore, in the aforementioned on-load tap changer's opposing sliding box type quick mechanism, the first end of the sliding box gripper is pinned to the base via a pivot pin, and the second end of the sliding box gripper has a gripping end face for gripping the end of the sliding box retaining protrusion. The sliding box release trigger is a rod-shaped structure, with its first end located on the sliding box gripper. The side wall of the upper sliding box has an upper sliding box release protrusion. When the upper sliding box slides into position, the upper sliding box protrusion applies force to the second end of the sliding box release trigger, causing the sliding box release trigger to drive the sliding box gripper to rotate in the direction away from the sliding box. Consequently, the second end of the sliding box gripper releases its grip on the end of the sliding box protrusion, thus releasing the grip on the sliding box.

[0009] Furthermore, in the aforementioned on-load tap changer's opposing sliding box type quick mechanism, the base is provided with paired upper sliding box gripping members, each corresponding to one of the upper sliding boxes. An upper sliding box gripping return spring is also provided between the two upper sliding box gripping members. The upper sliding box is provided with an upper sliding box locking protrusion, which, when the upper sliding box slides to its current position, is gripped by the upper sliding box gripping member under the action of the upper sliding box gripping return spring, thus stopping the upper sliding box at its current position. Each upper sliding box gripping member is provided with an upper sliding box release trigger, which releases the gripping of the upper sliding box when the lower sliding box slides to its current position.

[0010] Furthermore, in the aforementioned on-load tap changer's opposing sliding box type quick mechanism, the two upper sliding boxes of the two sets of sliding box type energy storage and release components are symmetrically arranged on both sides of the transmission input component and are both connected to the transmission input component. They are used to slide in the opposite direction under the action of the transmission input component, and to make the two lower sliding boxes slide in the opposite direction when the energy storage spring releases energy. The two lower sliding boxes of the two sets of sliding box type energy storage and release components are symmetrically arranged on both sides of the power output component and are both connected to the power output component. They are used to drive the power output component to move under the reverse sliding action of the two lower sliding boxes.

[0011] Furthermore, in the aforementioned on-load tap changer with opposing sliding box type quick mechanism, the transmission input assembly includes: a transmission input crank, a slotted connecting plate, and two eccentric pins; wherein, the transmission input crank is provided with an eccentric crankshaft section; the slotted connecting plate has a T-shaped structure, and the vertical connecting section of the slotted connecting plate is provided with a straight groove adapted to the eccentric crankshaft section, the eccentric crankshaft section being slidably and rotatably passing through the straight groove; the first ends of the two eccentric pins are respectively hinged to the two ends of the transverse connecting section of the slotted connecting plate, and the second ends of the two eccentric pins are respectively connected to two input transmission gears. Two input transmission gears are arranged on the same straight line; two eccentric pivots and the slotted connecting plate form a four-bar linkage mechanism, which moves under the action of the transmission input crank to drive the two input transmission gears to rotate; the two upper sliding boxes of the two sliding box-type energy storage and release components are respectively arranged on both sides of the two input transmission gears, and each upper sliding box has an input rack on the opposite side. The input rack meshes with the two input transmission gears and moves linearly under the action of the input transmission gears to drive the two upper sliding boxes to slide in opposite directions to achieve energy storage.

[0012] Furthermore, in the aforementioned on-load tap changer's opposing slide-type quick mechanism, the input transmission gear is rotatably mounted on the base.

[0013] Furthermore, in the aforementioned on-load tap changer with opposing sliding box type quick mechanism, the transmission input component includes: a transmission input shaft and an input gear connected to each other; wherein, the input gear is disposed between the two upper sliding boxes of the two sliding box type energy storage and release components, and each upper sliding box is provided with an input rack on the opposite side, the input rack meshing with the input gear, when the transmission input shaft rotates, it drives the input gear to rotate, causing the input rack to move linearly, thereby driving the upper sliding box to slide, so as to realize energy storage.

[0014] Furthermore, in the aforementioned on-load tap changer with opposing sliding box type quick mechanism, the power output component includes an output gear; wherein the output gear is disposed between the two sliding boxes of the two sliding box type energy storage and release components, and each sliding box has an output rack on its opposite side, the output rack meshing with the output gear, for driving the output gear to rotate when the sliding box slides, so as to realize motion output.

[0015] The on-load tap changer with opposing sliding box type fast mechanism provided by the present invention uses two sets of sliding box type energy storage and release components symmetrically arranged so that the two sets of sliding box type energy storage and release components move in opposite directions. This allows the impact forces of the two sets of sliding box type energy storage and release components to partially cancel each other out when releasing energy, reducing the unidirectional impact force at the moment of switching, thereby reducing impact vibration, reducing the failure rate of tap changer switching caused by vibration and improving service life. It also solves the problem that the existing single sliding box mechanism will brake instantly at the end of energy storage and release, causing the fast mechanism to generate a large unidirectional impact. Attached Figure Description

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0017] Figure 1 This is an axial sectional view of the opposed sliding box type quick mechanism of the on-load tap changer provided in the first embodiment of the present invention;

[0018] Figure 2 A partial sectional perspective view of the opposed sliding box type quick mechanism of the on-load tap changer provided in the first embodiment of the present invention;

[0019] Figure 3 A top sectional view of the opposed sliding box type quick mechanism of the on-load tap changer provided in the first embodiment of the present invention;

[0020] Figure 4This is a schematic diagram of the structure of the sliding box-type energy storage and release component provided in the first embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure for fixing the sliding box grabber according to the first embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the transmission input crank and slotted connecting plate provided in the first embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the transmission input crank provided in the first embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the slotted connecting plate provided in the first embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of the motion of the transmission input component provided in the first embodiment of the present invention;

[0026] Figure 10 This is another structural schematic diagram of the motion of the transmission input component provided in the first embodiment of the present invention;

[0027] Figure 11 A perspective view of the opposing slide-type quick-connect mechanism of the on-load tap changer provided in the second embodiment of the present invention;

[0028] Figure 12 A half-sectional perspective view of the opposing slide-type quick mechanism of the on-load tap changer provided in the second embodiment of the present invention;

[0029] Figure 13 A half-sectional top view of the opposing slide-type quick mechanism of the on-load tap changer provided in the second embodiment of the present invention;

[0030] Figure 14 This is a schematic diagram of the structure of the sliding box and the upper sliding box gripper provided in the second embodiment of the present invention;

[0031] Figure 15 This is a schematic diagram of the upper sliding box gripper provided in the second embodiment of the present invention. Detailed Implementation

[0032] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] First embodiment:

[0034] See Figures 1 to 3 This figure illustrates a preferred structure of the opposed sliding-box type quick-connect mechanism for an on-load tap changer provided in the first embodiment of the present invention. As shown, the opposed sliding-box type quick-connect mechanism includes: a base 1, two sets of sliding-box type energy storage and release components 2, a transmission input component 3, and a power output component 4. The two sets of sliding-box type energy storage and release components 2 are symmetrically arranged on the base 1 for synchronous reverse movement to store and release energy. The transmission input component 3 is connected to the power input end of the sliding-box type energy storage and release component 2 and is used to connect a drive mechanism (not shown in the figure) to drive the sliding-box type energy storage and release component 2 to store energy. The power output component 4 is connected to the power output end of the sliding-box type energy storage and release component 2 and is used to move under the action of the power output end of the sliding-box type energy storage and release component 2 to output motion, thereby realizing the on-load tap changer quick-connect switching and completing the voltage regulation switching.

[0035] In specific implementation, the two sets of sliding box-type energy storage and release components 2 are respectively the first sliding box-type energy storage and release component 201 and the second sliding box-type energy storage and release component 202. The first sliding box-type energy storage and release component 201 and the second sliding box-type energy storage and release component 202 are symmetrical about each other (relative to each other). Figure 1(As shown in the diagram) and spaced apart on the base 1; the transmission input component 3 and the power output component 4 are arranged vertically, and both are positioned between the two sets of sliding box-type energy storage and release components 2; the power input ends of the two sets of sliding box-type energy storage and release components 2 are connected to the transmission input component 3, and the power output ends of the two sets of sliding box-type energy storage and release components 2 are connected to the power output component 4. The drive mechanism drives the transmission input component 3 to move, which can drive the two sets of sliding box-type energy storage and release components 2 to move synchronously in opposite directions under the action of the transmission input component 3, and store energy synchronously; until the maximum energy is stored, the energy is released synchronously, so that the two sets of sliding box-type energy storage and release components 2 drive the power output component 4 to rotate rapidly, thereby realizing the on-load tap changer tapping action. At the end of the energy storage release, the two sets of sliding box energy storage and release components 2 move in opposite directions, so that when the two sets of sliding box energy storage and release components 2 release energy, the impact force can partially cancel each other out, thereby reducing the impact vibration, reducing the failure rate of tap changer switching caused by vibration and improving service life. In other words, by opposing the two sets of sliding box energy storage and release components 2, the unidirectional impact force at the moment of switching is reduced, thereby reducing the failure rate of on-load tap changer caused by impact and improving service life.

[0036] See also Figure 2 and Figure 3 The sliding box type energy storage and release assembly 2 includes: an upper sliding box 21, a lower sliding box 22, and an energy storage spring 23; wherein, the upper sliding box 21 is disposed above the lower sliding box 22, and both the upper sliding box 21 and the lower sliding box 22 are slidably disposed on the base 1; the energy storage spring 23 is disposed between the upper sliding box 21 and the lower sliding box 22, and the upper sliding box 21 slides away from the lower sliding box 22 under the action of the transmission input assembly 3 (e.g., Figure 3 When the upper sliding box 21 on the right slides upward and the upper sliding box 21 on the left slides downward, the energy storage spring 23 stores energy. The energy storage spring 23 can release energy after the upper sliding box 21 slides into place, so that the lower sliding box 22 slides against the upper sliding box 21, which can drive the lower sliding box 22 on the right to slide upward and the upper sliding box 22 on the left to slide downward, thereby driving the power output component 4 to output motion.

[0037] In a specific implementation, the base 1 may be provided with an upper sliding box guide rail 11 and a lower sliding box guide rail 12. The upper sliding box 21 is slidably connected to the upper sliding box guide rail 11 along its length direction, and the lower sliding box 22 is slidably connected to the lower sliding box guide rail 12 along its length direction. The upper sliding box guide rail 11 and the lower sliding box guide rail 12 respectively guide the sliding of the upper sliding box 21 and the lower sliding box 22. In this embodiment, there are two upper sliding box guide rails 11 and two lower sliding box guide rails 12 to ensure the stability of the sliding of the upper sliding box 21 and the lower sliding box 22. One end of the energy storage spring 23 is supported on the inner end face of the upper sliding box 21, and the other end is supported on the inner end face of the lower sliding box 22. That is, the two end faces of the energy storage spring 23 are in contact with the upper sliding box 21 and the lower sliding box 22 respectively. It can store energy when the upper sliding box 21 slides away from the lower sliding box 22, and after the upper sliding box 21 slides into place, it stores the maximum energy and releases the energy, applying a force to the lower sliding box 22, so that the lower sliding box 22 slides against the upper sliding box 21.

[0038] In this embodiment, the two upper sliding boxes 21 of the two sliding box-type energy storage and release components 2 are symmetrically arranged on both sides of the transmission input component 3 (e.g., Figure 3 The two sliding boxes 22 are symmetrically arranged on both sides of the power output component 4 and connected to the transmission input component 3. They are used to slide in the opposite direction under the action of the transmission input component 3, and to make the two sliding boxes 22 slide in the opposite direction when the energy storage spring 23 releases energy.

[0039] In practical implementation, the two upper sliding boxes 21 can move synchronously in opposite directions along the upper sliding box guide rail 11 under the action of the transmission input component 3, for example, as Figure 3 The upper sliding box 21 on the right slides upwards, and the upper sliding box 21 on the left slides downwards. The energy storage spring 23 stores energy when the upper sliding box 21 slides away from the lower sliding box 22, and releases the energy after the upper sliding box 21 has slid into place, applying a force to the lower sliding box 22, causing the lower sliding box 22 to slide against the upper sliding box 21. This results in the two lower sliding boxes 22 moving synchronously in opposite directions, which in turn synchronously drives the power output component 4 to rotate rapidly, achieving motion output. Since the two lower sliding boxes 22 move in opposite directions, the impact forces partially cancel each other out, thereby reducing impact vibration, reducing the failure rate of tap changer switching caused by vibration, and improving service life.

[0040] See also Figures 2 to 5To achieve the limiting of the sliding box 22, preferably, the base 1 is provided with a pair of sliding box gripping members 24, which correspond to the sliding box 22. The sliding box 22 is provided with a sliding box locking protrusion 221, and the two sliding box gripping members 24 are spaced apart at the sliding box locking protrusion 221, respectively gripping the end of the sliding box locking protrusion 221 to limit the sliding box 22, so that the upper sliding box 21 can slide away from the sliding box 22, thereby allowing the energy storage spring 23 to store energy. Each sliding box gripping member 24 is provided with a sliding box release trigger 25, which is used to release the gripping of the sliding box 22 when the upper sliding box 21 slides into place, so that the sliding box 22 can slide against the upper sliding box 21 under the action of the energy storage spring 23.

[0041] In specific implementation, such as Figure 2 and Figure 3 As shown, each sliding box 22 is provided with a pair of sliding box grippers 24 to limit the two ends of the sliding box locking protrusion 221 respectively, as shown. Figure 4 As shown, when the lower sliding box 22 is located at the left end, the right lower sliding box gripper 24 grips the right side of the right end of the lower sliding box retaining protrusion 221 to prevent the lower sliding box 22 from moving to the right, so that the upper sliding box 21 can move to the right relative to the lower sliding box 22, thereby realizing the energy storage of the energy storage spring 23 and storing it to the maximum energy. During this process, the left lower sliding box gripper 24 is in a free state and presses against the outer wall surface of the lower sliding box retaining protrusion 221. Of course, when the lower sliding box 22 is located at the right end, the left lower sliding box gripper 24 grips the left side of the left end of the lower sliding box retaining protrusion 221 to prevent the lower sliding box 22 from moving to the left, thereby limiting the position of the two ends of the lower sliding box 22 and ensuring that during the energy storage process, only the upper sliding box 21 slides while the lower sliding box 22 remains fixed.

[0042] like Figure 4 As shown, when the upper sliding box 22 moves to the right end, a force is applied to the lower sliding box release trigger 25, causing the lower sliding box release trigger 25 to drive the lower sliding box gripper 24 to move, so that the lower sliding box gripper 24 releases its grip on the lower sliding box 22, that is, releases the limit on the lower sliding box 22, and then the lower sliding box 22, under the action of the energy stored in the energy storage spring 23, quickly slides towards the opposite end of the position of the upper sliding box 21 (for example, when the upper sliding box 21 is at the rightmost end, it quickly slides towards the rightmost end). The rapid sliding of the lower sliding box 22 causes it to drive the power output component 4 to rotate rapidly, thereby realizing the tap-connection action of the on-load tap changer.

[0043] In this embodiment, to ensure the stability of the sliding box gripper 24 in gripping the sliding box 22, preferably, as follows: Figure 5As shown, a sliding box gripper 24 and a base 1 are provided with a sliding box gripper reset spring 26 so that when the sliding box 21 moves to the right end, the left sliding box gripper 24 is pushed inward by the corresponding sliding box gripper reset spring 26 and rotates. The end face of the left sliding box gripper 24 contacts the left step of the sliding box locking protrusion 221, and the sliding box 22 cannot move to the left. Therefore, when the upper sliding box 22 moves to the left to complete the energy storage action, although the energy storage spring 23 has a leftward pushing force on the sliding box 22, the sliding box 22 cannot move under the limiting action of the left sliding box gripper 24.

[0044] See also Figure 3 The first end of the sliding box grabber 24 (e.g.) Figure 3 The right end of the sliding box gripper 24 shown on the right is connected to the base 1 via a pivot pin 241. The second end of the sliding box gripper 24 (as shown on the right) is connected to the base 1 via a pivot pin 241. Figure 3 The left end of the sliding box gripper 24 shown on the right has a gripping end face 242 for gripping the end of the sliding box retaining boss 221; the sliding box release trigger 25 is a rod-shaped structure, the first end (as shown in the image) Figure 3 The right end of the slide box release trigger 25 shown on the right is set on the slide box gripper 24. An upper slide box release boss 211 is provided on the side wall of the upper slide box 21. When the upper slide box 21 slides into place, the upper slide box boss 211 applies force to the second end of the slide box release trigger 25 (e.g., the right end of the slide box release trigger 25). Figure 3 On the left end of the right side of the slide box release trigger 25 shown, the slide box release trigger 25 causes the slide box gripper 24 to rotate in the direction away from the slide box 22, thereby releasing the gripper 24 from the end of the slide box boss 221, and thus releasing the gripper on the slide box 22.

[0045] In specific implementation, the first end of the sliding box gripper 24 is rotatably mounted on the base 1 via a pivot pin 241, allowing the sliding box gripper 24 to rotate around the axis of the pivot pin 241. This allows the second end of the sliding box gripper 24 to press against the outer wall of the sliding box locking protrusion 221 or at the end of the sliding box locking protrusion 221. The side wall of the upper sliding box 21 is provided with an upper sliding box release protrusion 211. The position of the upper sliding box release protrusion 211 matches the position of the two sliding box release triggers 25. Furthermore, both ends of the upper sliding box release protrusion 211 can be provided with guide surfaces to push the sliding box release triggers 25 to move, thereby causing the sliding box gripper 24 to rotate. The first end of the sliding box release trigger 25 can be fixed on the sliding box gripper 24, and the second end of the sliding box release trigger 25 can press against the outer wall of the upper sliding box 21 so that when the upper sliding box release boss 211 of the upper sliding box 21 moves to the corresponding position, it pushes the sliding box release trigger 25 to rotate, thereby driving the sliding box gripper 24 to rotate, so as to grip the sliding box 22.

[0046] In this embodiment, the sliding box release trigger 25 can be a bent rod-shaped structure, forming an L-shaped structure. The bottom end of the vertically bent section is the first end of the sliding box release trigger 25, which can be fixedly connected to the sliding box gripper 24. The top end of the vertically bent section is fixedly connected to one end of the horizontally bent section, and the other end of the horizontally bent section is the second end of the sliding box release trigger 25. An upper sliding box bearing roller 27 can be provided. The upper sliding box bearing roller 27 is rotatably disposed at the second end of the sliding box release trigger 25 and is used to press against the outer wall of the upper sliding box 21, thereby reducing the friction between the sliding box release trigger 25 and the upper sliding box 21. In this process, the right inclined surface of the upper slide box release boss 211 pushes the upper slide box bearing roller 27, which is installed on the right lower slide box release trigger 25, outward to move outward. The inner ring of the upper slide box bearing roller 27 is fixedly installed with the lower slide box release trigger 25, so that the lower slide box release trigger 25 drives the lower slide box gripper 24 to rotate outward around the pivot pin 241. The gripping end face 242 of the lower slide box gripper 24 disengages from the contact with the right end face of the lower slide box locking boss 221, thus releasing the restriction on the rightward movement of the lower slide box 22.

[0047] In this embodiment, the transmission input component 3 can convert the rotation input by the drive mechanism into the reciprocating linear motion of the upper slide box 21, which can enable the two upper slide boxes 21 to move synchronously in opposite directions.

[0048] See also Figures 2 to 3 , Figure 6 The transmission input component 3 can be an eccentric transmission component, which may include: a transmission input crank 31, a slotted connecting plate 32, and two eccentric pivot pins 33; wherein, as shown in the figure... Figure 7 As shown, the transmission input crank 31 is provided with an eccentric crankshaft section 311; the slotted connecting plate 32 has a T-shaped structure, and the vertical connecting section of the slotted connecting plate 32 is provided with a straight groove 321 adapted to the eccentric crankshaft section 311. The eccentric crankshaft section 311 is slidably and rotatably inserted into the straight groove 321; the first ends of the two eccentric pivot pins 33 are respectively hinged to the two ends of the transverse connecting section of the slotted connecting plate 32, and the second ends of the two eccentric pivot pins 33 are respectively connected to two input transmission gears 34, which are arranged on the same straight line; the two eccentric pivot pins 33 and The slotted connecting plate 32 forms a four-bar linkage mechanism, which moves under the action of the transmission input crank 31 to drive the two input transmission gears 34 to rotate. The two upper sliding boxes 21 of the two sliding box type energy storage and release components 2 are respectively arranged on both sides of the two input transmission gears 34. Furthermore, each upper sliding box 21 is provided with an input rack 212 on the opposite side. The input rack 212 meshes with the two input transmission gears 34 and is used to move linearly under the action of the input transmission gears 34 to drive the two upper sliding boxes 21 to slide in opposite directions to achieve energy storage.

[0049] In practical implementation, the transmission input crank 31 can drive the eccentric crankshaft section 311 to rotate around the axis of the transmission input crank 31 under the driving action of the drive mechanism. For example... Figure 7 As shown, the diameter of the transmission input crank 31 and the diameter of the eccentric crankshaft section 311 can be the same, both being Φ. Of course, they can be different in other embodiments, and this embodiment does not impose any limitations on them. Figure 6 As shown, a bearing 312 can be fitted onto the eccentric crankshaft section 311 to reduce friction between the eccentric crankshaft section 311 and the slotted connecting plate 32. Figure 6 and Figure 8 As shown, the slotted connecting plate 32 has a T-shaped structure. A straight groove 321 is provided on the vertical connecting section of the slotted connecting plate 32. The straight groove 321 can be a waist-shaped hole, adapted to the eccentric crankshaft section 311, i.e., adapted to the bearing 312. The eccentric crankshaft section 311 is slidably and rotatably inserted into the straight groove 321, i.e., a sliding connection, so that the slotted connecting plate 32 moves under the action of the eccentric crankshaft section 311. Mounting holes 322 are provided at both ends of the transverse connecting section of the slotted connecting plate 32. The first ends of the two eccentric pivot pins 33 are movably connected to the two mounting holes 322 on the slotted connecting plate 32 via pins, i.e., rotatably connected. The second ends of the two eccentric pivot pins 33 can be fixedly connected to two input transmission gears 34, respectively. The two input transmission gears 34 are rotatably mounted on the base 1, and can be mounted on the base 1 via bearings, so that the axis position of the input transmission gears 34 is fixed relative to the base, and the input transmission gears 34 can rotate around this axis. Furthermore, the two input transmission gears 34 respectively mesh with the rack 212 mounted on the upper slide box 21. The second ends of the two eccentric pins 33 can be connected to the input transmission gears 34 via splines or can be an integral structure, so that when the eccentric pins 33 rotate, they drive the input transmission gears 34 to rotate synchronously.

[0050] In this embodiment, as Figure 2 As shown in the figure, the eccentric pivot pin 33 is not shown. The slotted connecting plate 32 and the two eccentric pivot pins 33 constitute a parallelogram linkage mechanism. When the eccentric crankshaft section 311 rotates eccentrically around the axis of the transmission input crank 31 along with the transmission input crank 31, it can drive the parallelogram linkage mechanism to move, causing the input transmission gear 34 to swing back and forth with the eccentric pivot pins 33. Figure 9 As shown, when the eccentric crankshaft section 311 stops at the very bottom of the axis O of the transmission input crank 31, regardless of whether the eccentric crankshaft section 311 rotates clockwise or counterclockwise, the slotted connecting plate 32 will be pushed upward by the eccentric crankshaft section 311, causing the two eccentric pivot pins 33 connected to the eccentric crankshaft section 311 to rotate clockwise, which in turn causes the two input transmission gears 34 to rotate clockwise, and can rotate to... Figure 10As shown, during this process, the two input transmission gears 34 rotate clockwise, causing the right input rack 212 to move downwards and the left input rack 212 to move upwards. This, in turn, causes the right upper slide box 21 to move downwards and the left upper slide box 21 to move upwards, until they reach the end position. Simultaneously, when the upper slide box 21 reaches the end position, the eccentric crankshaft section 311 stops at the very top of the axis of the transmission input crank 31. Similarly, when the eccentric crankshaft section 311 stops at the very top of the axis of the transmission input crank 31, regardless of whether the eccentric crankshaft section 311 rotates forwards or backwards, the slotted connecting plate 32... Both are pushed downward by the eccentric crankshaft section 311, causing the two eccentric pins 33 connected to the eccentric crankshaft section 311 to rotate counterclockwise, which in turn causes the two input transmission gears 34 to rotate counterclockwise. During this process, the counterclockwise rotation of the two input transmission gears 34 causes the right input rack 212 to move upward and the left input rack 212 to move downward, which in turn causes the right upper slide box 21 to move upward and the left upper slide box 21 to move downward, until they reach the end. At the same time that the upper slide box 21 reaches the end position, the eccentric crankshaft section 311 stops at the very bottom of the axis of the transmission input crank 31.

[0051] Therefore, since each stroke starts from the top of the input shaft crankshaft section and ends at the bottom, or starts from the bottom and ends at the top, after each rotational action is completed, the next stroke of the input transmission gear 34 must be a reverse rotation, so that the next stroke of the upper sliding box 21 must be a reverse sliding.

[0052] See also Figure 3 The power output assembly 4 includes an output gear 41. The output gear 41 is positioned between the two sliding boxes 22 of the two sliding box-type energy storage and release assemblies 2. Each sliding box 22 has an output rack 222 on its opposite side, which meshes with the output gear 41. This rack drives the output gear 41 to rotate when the sliding box 22 slides, thus achieving motion output. Specifically, the output gear 41 can be positioned between the two sliding boxes 22 and mesh with the output racks 222 on both sliding boxes 22. This ensures that when the two sliding boxes 22 slide in opposite directions, the output gear 41 can rotate under the action of the two output racks 222, guaranteeing the stability of the output gear 41's rotation. An output shaft can also be connected to the output gear 41, and the two are connected by a spline to rotate synchronously, enabling motion output through the output shaft, i.e., realizing on-load tap changer switching.

[0053] The working process of the on-load tap changer's opposing sliding box type quick mechanism provided in the first embodiment is as follows: During the energy storage stroke, the external drive mechanism inputs rotational motion, driving the transmission input crank 31 to rotate. The slotted connecting plate 32 and the two eccentric pivot pins 33 form a four-bar linkage, converting the rotational motion of the transmission input crank 31 into the reciprocating rotation of the two input transmission gears 34. The rotation of the input transmission gears 34 respectively drives the two input racks 212 on both meshing sides to move linearly, thereby pushing the two upper sliding boxes 21 fixedly installed with the two input racks 212 to move linearly. When the upper sliding box 21 moves linearly to one end, the stroke is released, and the upper sliding box release boss 211 is released. In addition to the fixing of the sliding box 22 by the sliding box gripper 24, the external input pauses the rotational motion input. Under the spring force of the energy storage spring 23, the sliding box 22 moves rapidly in a straight line, thereby driving the output gear 41 to rotate. The output gear 41 outputs the motion through the spline and the output shaft, completing a single tap changer switch. During the next switch, the external input rotates. Under the action of the four-bar linkage, whether the external input rotates forward or backward, it will drive the upper sliding box 21 to move in the opposite direction to the previous action. Then, during the release stroke, the energy storage spring 23 pushes the sliding box 22 to move in the opposite straight line, driving the power output component 4 to rotate in the opposite direction and output.

[0054] Second embodiment:

[0055] See Figures 11 to 14 The figure illustrates a preferred structure of the opposed slide-type quick-release mechanism for an on-load tap changer provided in the second embodiment of the present invention. As shown, the difference between the opposed slide-type quick-release mechanism for an on-load tap changer provided in the second embodiment and the opposed slide-type quick-release mechanism for an on-load tap changer provided in the first embodiment lies in the different structures of the slide-type energy storage and release component 2 and the transmission input component 3. The positional and connection relationships between other components are the same as in the first embodiment.

[0056] In this embodiment, the difference between the sliding box energy storage and release component 2 and the sliding box energy storage and release component 2 in the first embodiment is that: in this embodiment, the sliding box energy storage and release component 2 further includes: an upper sliding box gripper 28 and an upper sliding box release trigger 29, as well as the connection relationship between the two and the corresponding components. The positional relationship, connection relationship and structure between other components are the same as in the first embodiment.

[0057] See also Figures 11 to 14The base 1 is provided with paired upper sliding box grippers 28, each corresponding to an upper sliding box 21. An upper sliding box gripper return spring 30 is also provided between the two upper sliding box grippers 28. The upper sliding box 21 is provided with an upper sliding box locking protrusion 213, which, when the upper sliding box 21 slides to its current position, is gripped by the upper sliding box grippers 28 under the action of the upper sliding box gripper return spring 30, thus stopping the upper sliding box 21 at its current position. Each upper sliding box gripper 28 is provided with an upper sliding box release trigger 29, which releases the grip on the upper sliding box 21 when the lower sliding box 22 slides to its current position.

[0058] In specific implementation, such as Figure 11 and Figure 13 As shown, each upper sliding box 21 is provided with two spaced upper sliding box grippers 28 to limit the two ends of the upper sliding box locking protrusion 213 respectively. Each upper sliding box gripper 28 is rotatably mounted on the base 1. The two upper sliding box grippers 28 corresponding to the upper sliding box 21 correspond one-to-one with the two upper sliding box grippers 28 corresponding to the other upper sliding box 21, forming a pair. An upper sliding box gripper return spring 30 is provided between the two corresponding upper sliding box grippers 28. When the upper sliding box locking protrusion 213 moves away from the position of the upper sliding box gripper 28, the upper sliding box gripper return spring 30 applies a force to the upper sliding box gripper 28, causing the upper sliding box gripper 28 to rotate and press against the side wall of the upper sliding box 21. Thus, when the upper sliding box locking protrusion 213 moves towards the upper sliding box gripper 28, the upper sliding box 21 can be limited by the upper sliding box gripper 28. The upper slide box release trigger 29 is set on the upper slide box gripper 28 and can cooperate with the lower slide box 22. After the lower slide box 22 moves close to the upper slide box 21 and into position, the upper slide box release trigger 29 is triggered, so that the upper slide box gripper 28 releases its limit on the upper slide box 21.

[0059] In this embodiment, the upper sliding box gripper 28, the upper sliding box release trigger 29, and the upper sliding box gripper reset spring 30 can be referenced to the lower sliding box gripper 24, the lower sliding box release trigger 25, and the lower sliding box gripper reset spring 26. The principles are basically the same, and the two can be referenced to each other.

[0060] See also Figure 14 and Figure 15 The first end of the upper sliding box gripper 28 (e.g. Figure 14 The left end of the upper sliding box gripper 28 shown on the left is pinned to the base 1 by rotating pin 281. The second end of the upper sliding box gripper 28 (as shown on the left) is pinned to the base 1 by rotating pin 281. Figure 14The upper sliding box gripper 28 (shown on the left) has a gripping end face 282 on its right end, used to grip the end of the upper sliding box retaining boss 213; the upper sliding box release trigger 29 is a circular plate structure, which can be an integral structure with the upper sliding box gripper 28; a lower sliding box bearing roller 291 is rotatably connected to the upper sliding box release trigger 29. The side wall of the lower sliding box 22 is provided with a lower sliding box release boss 223. In this embodiment, there are two lower sliding box release bosses 223; when the lower sliding box 22 slides into place, the lower sliding box release bosses 223 apply force to the lower sliding box bearing roller 291, causing the upper sliding box release trigger 29 to drive the upper sliding box gripper 28 to rotate away from the upper sliding box 21, thereby causing the second end of the upper sliding box gripper 28 to release its grip on the end of the upper sliding box retaining boss 213, and thus releasing the grip on the upper sliding box 21.

[0061] In specific implementation, the first end of the upper sliding box gripper 28 is rotatably mounted on the base 1 via a rotating pin 281, allowing the upper sliding box gripper 28 to rotate around the axis of the pin 281. This allows the second end of the upper sliding box gripper 28 to press against the outer wall of the upper sliding box locking boss 213 or at the end of the upper sliding box locking boss 213. The side wall of the lower sliding box 22 is provided with a lower sliding box release boss 223, the position of which matches the position of the corresponding upper sliding box gripper 28. Furthermore, the end of the lower sliding box release boss 223 may be provided with a guide surface to push the lower sliding box bearing roller 291 to move, thereby causing the upper sliding box gripper 28 to rotate and release the upper sliding box 21. The roller 291 of the lower slide box bearing can press against the outer wall of the lower slide box 22 to reduce the friction between them. It can also push the roller 291 of the lower slide box bearing to move through the release boss 223 of the lower slide box so that the upper slide box gripper 28 can contact the gripper of the upper slide box 21.

[0062] In this embodiment, the structures of other components of the sliding box type energy storage and release assembly 2, such as the upper sliding box 21, the lower sliding box 22 and the energy storage spring 23, can be the same as those in the first embodiment, and will not be described in detail here.

[0063] In this embodiment, the transmission input component 31 includes a transmission input shaft 35 and an input gear 36 connected to each other. The input gear 36 is disposed between the two upper sliding boxes 21 of the two sliding box type energy storage and release components 2. Each upper sliding box 21 is provided with an input rack 212 on the opposite side. The input rack 212 meshes with the input gear 36. When the transmission input shaft 35 rotates, it drives the input gear 36 to rotate, so that the input rack 212 moves linearly, thereby driving the upper sliding box 21 to slide, so as to realize energy storage.

[0064] In specific implementation, the rotation input from the transmission input shaft 35 is converted into the reciprocating linear motion of the upper sliding box 21 through the gear and rack structure. In particular, the two upper sliding boxes 21 are respectively placed on both sides of the input gear 36 and are both connected to the input gear 36, so that the input gear 36 can slide in the opposite direction synchronously with the two upper sliding boxes 21.

[0065] It should be noted that the positional and connection relationships of other components are the same as in the first embodiment, and relevant parts can be referred to each other.

[0066] The working process of the opposed sliding box type quick mechanism of the on-load tap changer provided in the second embodiment is as follows: During the energy storage stroke, the external drive mechanism inputs rotational motion, driving the transmission input shaft 35 and the input gear 36 to rotate. The input gear 36 meshes with two input racks 212, driving the two upper sliding boxes 21, which are fixedly connected to the input racks 212, to move linearly, and the two upper sliding boxes 21 move in opposite directions; when the upper sliding box 21 moves linearly to one end and slides into place, Upon commencement of the release stroke, the upper slide box gripper 28, under the action of the upper slide box gripper reset spring 30, engages with the stepped side of the upper slide box retaining boss 213 to prevent the upper slide box 21 from moving under the force of the energy storage spring during the release process. Simultaneously, the upper slide box release boss 211 releases the lower slide box gripper 24 from fixing the lower slide box 22, and the external input suspends the rotational motion input. The lower slide box 22 moves rapidly in a straight line under the spring force of the energy storage spring 23. The output rack 222 on the lower slide box 22 simultaneously meshes with the output gear 41, thereby driving the output gear 41 to rotate. The output gear 41 outputs the motion through the spline and the output shaft, completing one tap changer switch. When the lower slide box 22 completes its stroke, the lower slide box release boss 223 on the lower slide box 22 releases the upper slide box gripper 28 from temporarily fixing the upper slide box 21 through the upper slide box release trigger 29. During the next switch, the external input rotates in the opposite direction to the previous switch. The input gear 36 drives the two upper sliding boxes 21 to move in the opposite direction in a straight line. In turn, during the release stroke, it pushes the lower sliding box 22 to move in the opposite direction in a straight line, which drives the output gear 41 to rotate in the opposite direction for output.

[0067] In summary, the on-load tap changer's opposing sliding-box type fast mechanism provided in these two embodiments uses two sets of opposing, i.e., symmetrically arranged, sliding-box type energy storage and release components 2, so that the two sets of sliding-box type energy storage and release components 2 move in opposite directions. This allows the impact forces of the two sets of sliding-box type energy storage and release components 2 to partially cancel each other out when releasing energy, thereby reducing impact vibration, reducing the tap changer switching failure rate caused by vibration, and increasing service life. In other words, by reducing the unidirectional impact force at the moment of switching through two symmetrically arranged sliding-box type energy storage and release components 2, the on-load tap changer failure rate caused by impact is reduced and the service life is increased. This solves the problem that the existing single sliding-box mechanism will brake instantly at the end of energy storage and release, causing a large unidirectional impact in the fast mechanism.

[0068] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0069] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0070] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A fast-acting mechanism for an on-load tap changer, characterized in that, include: Base; Two sets of sliding box-type energy storage and release components are symmetrically arranged on the base for synchronous reverse movement to store and release energy. A transmission input component is connected to the power input end of the sliding box-type energy storage and release component, and is used to connect to a drive mechanism to drive the sliding box-type energy storage and release component to store energy. A power output component, which is connected to the power output end of the sliding box-type energy storage and release component, is used to move under the action of the power output end of the sliding box-type energy storage and release component to output motion and realize the switching of on-load tap changer. The sliding box-type energy storage and release assembly includes: an upper sliding box, a lower sliding box, and an energy storage spring; wherein... The upper sliding box is disposed above the lower sliding box, and both the upper sliding box and the lower sliding box are slidably disposed on the base; The energy storage spring is disposed between the upper sliding box and the lower sliding box. When the upper sliding box slides away from the lower sliding box under the action of the transmission input component, the energy storage spring stores energy. The energy storage spring can release energy after the upper sliding box slides into place, so that the lower sliding box slides towards the upper sliding box, thereby driving the power output component to perform motion output. The two upper sliding boxes of the two sets of sliding box-type energy storage and release components are symmetrically arranged on both sides of the transmission input component and are connected to the transmission input component. They are used to slide in the opposite direction under the action of the transmission input component, and to make the two lower sliding boxes slide in the opposite direction when the energy storage spring releases energy. The two sliding boxes of the two sets of sliding box-type energy storage and release components are symmetrically arranged on both sides of the power output component and are connected to the power output component to drive the power output component to move under the reverse sliding action of the two sliding boxes.

2. The opposite sliding box type quick-connect mechanism of the on-load tap changer according to claim 1, characterized in that, The base is provided with paired sliding box grippers, which correspond to the sliding boxes. The sliding box is provided with a sliding box locking protrusion, and two sliding box gripping parts are spaced apart at the sliding box locking protrusion to grip and lock at the end of the sliding box locking protrusion respectively, thereby limiting the sliding box and allowing the upper sliding box to slide away from the sliding box. Each of the sliding box gripping components is equipped with a sliding box release trigger, which is used to release the gripping of the sliding box when the upper sliding box slides into place, so that the sliding box can slide towards the upper sliding box under the action of the energy storage spring.

3. The opposite sliding box type quick mechanism of the on-load tap changer according to claim 2, characterized in that, The first end of the sliding box gripper is pinned to the base by a pivot pin, and the second end of the sliding box gripper is provided with a gripping end face for gripping the end of the sliding box retaining protrusion. The sliding box release trigger is a rod-shaped structure, with its first end located on the sliding box gripper. The upper sliding box has a release boss on its side wall. When the upper sliding box slides into place, the upper sliding box boss applies a force to the second end of the sliding box release trigger, causing the sliding box release trigger to rotate the sliding box gripper in the direction away from the sliding box. Consequently, the second end of the sliding box gripper releases its grip on the end of the sliding box boss, thus releasing the grip on the sliding box.

4. The opposite sliding box type quick-connect mechanism for on-load tap changer according to claim 1, characterized in that, The base is provided with a pair of upper sliding box gripping components, each of which corresponds to one upper sliding box. Furthermore, an upper sliding box gripping reset spring is provided between the two upper sliding box gripping components. The upper sliding box is provided with an upper sliding box locking protrusion, which is used to lock the upper sliding box locking component at the end of the upper sliding box locking protrusion under the action of the upper sliding box locking return spring when the upper sliding box slides into place, so as to stop the upper sliding box at the current position; Each of the upper sliding box gripping components is equipped with an upper sliding box release trigger, which is used to release the gripping of the upper sliding box when the lower sliding box slides into place.

5. The opposite sliding box type quick-connect mechanism for an on-load tap changer according to any one of claims 1 to 4, characterized in that, The transmission input assembly includes: a transmission input crank, a slotted connecting plate, and two eccentric pivot pins; wherein... The transmission input crank is provided with an eccentric crankshaft section; The slotted connecting plate has a T-shaped structure. The vertical connecting section of the slotted connecting plate is provided with a straight groove that is adapted to the eccentric crankshaft section. The eccentric crankshaft section is inserted through the straight groove in a way that allows it to slide and rotate. The first ends of the two eccentric pivots are respectively hinged to the two ends of the transverse connecting section of the slotted connecting plate, and the second ends of the two eccentric pivots are respectively connected to two input transmission gears, which are arranged on the same straight line. The two eccentric pivots and the slotted connecting plate form a four-bar linkage mechanism, which is used to move under the action of the transmission input crank to drive the two input transmission gears to rotate. The two upper sliding boxes of the two sliding box-type energy storage and release components are respectively arranged on both sides of the two input transmission gears. Furthermore, each upper sliding box has an input rack on the opposite side. The input rack meshes with the two input transmission gears and is used to perform linear motion under the action of the input transmission gears, so as to drive the two upper sliding boxes to slide in opposite directions to achieve energy storage.

6. The opposite sliding box type quick-connect mechanism for an on-load tap changer according to claim 5, characterized in that, The input transmission gear is rotatably mounted on the base.

7. The opposite sliding box type quick-connect mechanism for an on-load tap changer according to any one of claims 1 to 4, characterized in that, The transmission input assembly includes: a transmission input shaft and an input gear connected to each other; wherein... The input gear is disposed between the two upper sliding boxes of the two sliding box-type energy storage and release components. Furthermore, each upper sliding box is provided with an input rack on the opposite side. The input rack meshes with the input gear. When the transmission input shaft rotates, it drives the input gear to rotate, causing the input rack to move linearly, thereby driving the upper sliding box to slide to achieve energy storage.

8. The opposite sliding box type quick-connect mechanism for an on-load tap changer according to any one of claims 1 to 4, characterized in that, The power output component includes: an output gear; wherein... The output gear is disposed between the two sliding boxes of the two sliding box energy storage and release components, and each sliding box is provided with an output rack on the opposite side. The output rack meshes with the output gear and is used to drive the output gear to rotate when the sliding box slides, so as to realize motion output.

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