A quick mechanism for on-load tap changer and on-load tap changer

Abstract

This invention provides a fast mechanism and a fast-release mechanism for on-load tap changers. A drive unit converts rotary motion into reciprocating motion, driving an energy storage unit to store energy in either the forward or reverse direction. Additionally, it performs the unlocking function of an unlocking and release unit. Driven by the drive unit, the energy storage unit's spring deforms, storing energy. The unlocking and release unit, in conjunction with the energy storage unit, ensures precise unlocking and rapid release after the energy storage step. A buffer unit recovers residual energy after release, achieving a "fast release, slow stop" principle, thus ensuring stable locking of the locking unit and reducing motion impact. By integrating the drive, energy storage, release, locking, and buffering functions in an orderly and compact manner on the mounting support unit, the fast mechanism achieves rapid, symmetrical, reliable, and stable operation, significantly improving the switching performance and mechanical life of the on-load tap changer. This meets the requirements of precise electrical circuit execution during on-load tap changer operation and reduces the risk of switching failure.

Description

Technical Field

[0001] This invention belongs to the field of on-load tap changer technology, and specifically relates to a quick mechanism for on-load tap changers and an on-load tap changer. Background Technology

[0002] An on-load tap changer (OLTC) is a crucial voltage regulating device in a transformer. It adjusts the turns ratio by changing the tap position of the windings when the transformer is energized or under load, thereby achieving real-time regulation of the output voltage and ensuring the stable operation of the power system. The voltage regulating mechanism needs to complete the voltage switching in an extremely short time. Therefore, the OLTC has a rapid release mechanism that utilizes spring energy storage to complete the step-switching action. As the core driving component of the OLTC, the accuracy and reliability of this rapid release mechanism directly affect the success or failure of the entire switching process.

[0003] In actual operation, existing fast-action tap changers have exhibited quality issues such as switching failures, which could lead to transformer damage or even localized power grid outages. Therefore, effectively improving the operational reliability of on-load tap changers and reducing safety hazards has become a crucial technical problem urgently needing to be solved in this field.

[0004] The shortcomings of existing on-load tap changer fast-action mechanisms include:

[0005] 1. Asymmetry of forward and reverse motion: Due to the use of a "cam-swing wheel" structure in the drive mechanism, its own motion characteristics cause asymmetry in the forward and reverse rotation of the mechanism, which in turn makes the entire drive process of the fast mechanism asymmetrical, affecting the stability and consistency of the action.

[0006] 2. Complex unlocking structure and poor precision: Its unlocking action relies on the transient execution of the gears during the release process, requiring an additional unlocking structure on the rapidly moving gears, forming a composite process of "energy storage" and "synchronous unlocking during release." This design not only increases structural complexity but also results in poor unlocking precision due to the difficulty in accurately controlling the unlocking timing during high-speed dynamics, easily leading to false triggering or failure to activate.

[0007] In summary, although existing technologies are dedicated to improving transmission efficiency, they have inherent shortcomings in terms of motion symmetry and unlocking control precision, which still restrict the further improvement of the overall operational reliability of on-load tap changers. Summary of the Invention

[0008] The purpose of this invention is to provide a fast mechanism for on-load tap changers and an on-load tap changer, so as to meet the requirements of precise electrical circuit execution during on-load tap changers and reduce the risk of switching failure.

[0009] To solve the above-mentioned technical problems, the present invention provides a quick mechanism for on-load tap changers, comprising: a drive unit, an energy storage unit, an unlocking and release unit, two locking units, two buffer units, and a mounting support unit;

[0010] The drive unit, the energy storage unit, the unlocking and releasing unit, the locking unit, and the buffer unit are all mounted on the mounting support unit.

[0011] The input end of the drive unit is rotatably mounted on the mounting support unit and is used to receive an external power source to achieve rotation. The output end of the drive unit is used to convert the rotational motion of the input end into reciprocating motion. The reciprocating motion of the output end of the drive unit is completely symmetrical.

[0012] The input end of the energy storage unit is connected to the output end of the drive unit for receiving the power transmitted by the drive unit, so as to store and release energy.

[0013] The unlocking and release unit is used to cooperate with the energy storage unit to unlock according to a predetermined time sequence to release energy. The output end of the unlocking and release unit is used to output power to the outside to realize the switching of on-load tap changer.

[0014] The two locking units are symmetrically arranged at the forward locking position and the reverse locking position of the output end of the unlocking and releasing unit, respectively, for locking after the unlocking and releasing unit is released to the preset position;

[0015] The two buffer units are symmetrically arranged on both sides of the output end of the unlocking and releasing unit, and are used to recover the remaining energy after the unlocking and releasing unit is released.

[0016] Optionally, in the above-mentioned quick mechanism for on-load tap changers, the drive unit includes a main drive shaft, a drive gear, a driven gear, a camshaft, a guide rod bracket, a guide rod, a slider, a follower gear, and a pin.

[0017] The main drive shaft is rotatably mounted on the mounting support unit. The driving gear is fixed on the main drive shaft. The guide rod bracket is fixed on the mounting support unit. The guide rod is arranged in a radial direction perpendicular to the driving gear. The slider is slidably connected to the guide rod. The slider has a first groove and a second groove arranged radially. The camshaft end is rotatably mounted on the mounting support unit, and the cam end slides in the first groove. The driven gear is fixed to the camshaft end and meshes with the driving gear. The follower gear is mounted on the main drive shaft through a bearing. The pin is mounted on the outer edge of the follower gear and is used to slide with the second groove of the slider to drive the follower gear to rotate. The main drive shaft is the input end of the drive unit, and the follower gear is the output end of the drive unit.

[0018] Optionally, in the above-mentioned quick mechanism for on-load tap changer, the guide rod support is a U-shaped housing, the open end of the U-shaped housing faces downward, and both sides are connected to the two ends of the guide rod respectively. The middle section of the U-shaped housing is provided with a clearance groove for passing through the end of the camshaft.

[0019] The driving gear is located at the upper end of the follower gear, and the first groove and the second groove are respectively formed on the upper and lower surfaces of the slider.

[0020] Optionally, in the above-mentioned quick mechanism for on-load tap changers, the energy storage unit includes a cam, a spring, a gear, and a fixed shaft. The fixed shaft is fixed to the mounting support unit. The cam and the gear are fixedly connected and rotatably connected relative to the mounting support unit. A connecting rod is provided on the flange of the cam. The two ends of the spring are respectively connected to the connecting rod and the fixed shaft. The gear meshes with the follower gear for transmission.

[0021] Optionally, in the above-mentioned quick mechanism for on-load tap changers, the unlocking and releasing unit includes a roller, a boss shaft, a boss gear, and a swing wheel gear, and the locking unit is an elastic reset mechanism, the fixed end of which is fixed to the mounting support unit.

[0022] The roller is disposed at the movable end of the elastic reset mechanism, the boss shaft is rotatably mounted on the mounting support unit, the boss gear and the boss of the boss shaft are coaxially fixed below the gear in sequence, the shaft end of the boss shaft passes through the boss gear, the gear and the cam in sequence, and the swing wheel gear is rotatably disposed on the main drive shaft;

[0023] The movable ends of the two elastic reset mechanisms are respectively used to lock when the balance wheel gear swings to the forward locking position and the reverse locking position. When the energy storage unit has finished storing energy and needs to be unlocked, the slider can push the roller of the corresponding elastic reset mechanism to unlock the movable end of the elastic reset mechanism from the balance wheel gear.

[0024] Optionally, in the above-mentioned quick mechanism for on-load tap changers, the energy storage unit further includes a support frame, which is spaced apart from the fixed shaft and fixed to the mounting support unit, and the cam and the gear are rotatably mounted on the support frame.

[0025] Optionally, in the above-mentioned quick mechanism for on-load tap changers, the locking unit includes a rotating shaft, a mounting base, a pawl, and a compression spring. One end of the mounting base is mounted on the mounting support unit via the rotating shaft, and the other end of the mounting base is connected to the pawl via the compression spring. The pawl is used to engage with the end of the swing wheel gear, and the roller is rotatably mounted on the pawl.

[0026] Optionally, in the above-mentioned quick mechanism for on-load tap changers, the buffer unit includes a buffer seat, a buffer spring, and a striker. The buffer seat is mounted on the mounting support unit. The two ends of the buffer spring are respectively connected to the buffer seat and the striker. The buffer seat has a receiving cavity for mounting the buffer spring and an opening for the extension and retraction of the striker. The striker is used to buffer the swing of the balance wheel gear at its limit end.

[0027] Optionally, in the above-mentioned quick mechanism for on-load tap changers, the mounting support unit forms a receiving cavity, and the driving unit, the energy storage unit, the unlocking and releasing unit, the locking unit, and the buffer unit are all disposed within the receiving cavity.

[0028] Optionally, in the above-mentioned quick-connect mechanism for on-load tap changers, the mounting support unit includes a lower flange, an upper flange, and multiple legs, with the multiple legs respectively connected between the lower flange and the upper flange.

[0029] The present invention also provides an on-load tap changer, including the quick-connect mechanism for on-load tap changers described above.

[0030] This invention provides a quick-connect mechanism for on-load tap changers, the advantages of which are:

[0031] By integrating the driving unit, energy storage unit, unlocking and release unit, two locking units, and two buffer units into a single mounting support unit, the functions of driving, energy storage, release, locking, and buffering are combined in an orderly and compact manner. This achieves rapid, symmetrical, reliable, and smooth operation of the fast mechanism, significantly improving the switching performance and mechanical life of the on-load tap changer. This ensures that the on-load tap changer accurately executes electrical circuit processes during switching and reduces the risk of switching failure.

[0032] In addition, the present invention also provides an on-load tap changer that has the same beneficial effects. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a fast mechanism for an on-load tap changer provided in an embodiment of the present invention;

[0035] Figures 2-6 Schematic diagrams of the internal structure of the on-load tap changer quick mechanism provided in the embodiments of the present invention from different perspectives;

[0036] Figure 7 This is a schematic diagram of the structure of the camshaft, slider, and locking unit cooperating according to an embodiment of the present invention.

[0037] Figure 8 This is an assembly drawing of the boss shaft and boss gear provided in an embodiment of the present invention.

[0038] In the image above:

[0039] 100-Drive Unit;

[0040] 101-Main drive shaft; 102-Driving gear; 103-Driven gear; 104-Camshaft; 1041-Shaft; 1042-Cam; 105-Guide rod bracket; 106-Guide rod; 107-Slider; 1071-Guide rod hole; 1072-First slide groove; 1073-Unlocking drive block; 108-Follower gear; 109-Pin;

[0041] 200-Energy Storage Unit;

[0042] 201-Support frame; 202-Cam; 203-Spring; 204-Gear; 205-Fixed shaft;

[0043] 300 - Unlock and release unit;

[0044] 301 - Roller; 302 - Boss shaft; 303 - Boss gear; 304 - Balance wheel gear;

[0045] 400-Locking Unit;

[0046] 401 - Shaft; 402 - Mounting base; 403 - Clamping claw; 404 - Compression spring;

[0047] 500-buffer unit;

[0048] 501 - Buffer seat; 502 - Rush bolt;

[0049] 600 - Mounting support unit;

[0050] 601-Lower flange; 602-Upper flange; 603-Support leg; 604-Bearing mounting base. Detailed Implementation

[0051] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0052] The core of this invention is to provide a fast mechanism for on-load tap changers and an on-load tap changer, so as to meet the requirements of precise electrical circuit execution during on-load tap changers and reduce the risk of switching failure.

[0053] To enable those skilled in the art to better understand the technical solutions provided by the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0054] For details, please refer to Figures 1-8 The present invention provides a fast mechanism for on-load tap changers, comprising a drive unit 100, an energy storage unit 200, an unlocking and release unit 300, two locking units 400, two buffer units 500, and a mounting support unit 600.

[0055] The mounting support unit 600 serves as the mounting frame for the quick-release mechanism, supporting and mounting the components within each unit. It is typically made of high-strength metal materials (such as cast iron, aluminum alloy, or steel). The drive unit 100, energy storage unit 200, unlocking and releasing unit 300, locking unit 400, and buffer unit 500 are all mounted on the mounting support unit 600.

[0056] The input end of the drive unit 100 includes a main drive shaft 101, which is rotatably supported on the side wall of the mounting support unit 600 via bearings, and is used to connect to an external power source to achieve rotation. As the leading edge of the rapid mechanism 001, the drive unit 100 receives external power, converts rotation into reciprocating motion, and transmits power to the energy storage unit 200. It also performs the unlocking function of the unlocking and releasing unit 300. The core of the drive unit 100 is a motion conversion mechanism; in this embodiment, an eccentric wheel-linkage mechanism is preferred. The output end of the drive unit 100 converts the rotational motion of the input end into reciprocating motion. The reciprocating motion at the output end of the drive unit 100 is completely symmetrical, that is, completely symmetrical in both stroke and speed, ensuring the balance of subsequent actions of the mechanism.

[0057] The energy storage unit 200 is located behind the drive unit 100. The input end of the energy storage unit 200 is connected to the output end of the drive unit 100 for receiving power transmitted by the drive unit 100 for energy storage and release, preparing for energy release by the subsequent unlocking and release unit 300. The energy storage process is gradual until the energy storage component (such as a spring) of the energy storage unit 200 reaches a predetermined energy storage limit position.

[0058] The unlocking and release unit 300 is used to control the timing of energy release from the energy storage unit 200. The output of the unlocking and release unit 300 is used to output power to the outside, driving the switching arm of the on-load tap changer, thereby outputting a momentary and powerful impact force to achieve the switching of the on-load tap changer. The entire unlocking and release process is carried out according to a preset strict timing sequence.

[0059] The two locking units 400 are structurally identical and are symmetrically arranged at the extreme positions on both sides of the swing trajectory of the unlocking and releasing unit 300, namely the forward locking position and the reverse locking position. They are used to lock the unit after the unlocking and releasing unit 300 is released to the preset position.

[0060] Two buffer units 500 are also symmetrically arranged on both sides of the output end of the unlocking and release unit 300. The buffer units 500 efficiently absorb the remaining kinetic energy at the output end of the unlocking and release unit 300 through viscous damping or elastic deformation, and smoothly and gently stop the rapid movement, which greatly reduces the mechanical impact, vibration and noise of the mechanism, and protects the overall life of the mechanism itself and the on-load tap changer.

[0061] The locking unit 400 and the buffer unit 500 are located at the end of the transmission chain of the fast mechanism. After the unlocking and releasing unit 300 completes the energy release, the buffer unit 500 buffers the action, the locking unit 400 locks, completes the current action cycle, and prepares for the next cycle.

[0062] This invention integrates driving, energy storage, release, locking, and buffering functions in an orderly and compact manner on a single mounting support unit 600 through a driving unit 100, an energy storage unit 200, an unlocking and release unit 300, two locking units 400, and two buffer units 500. This achieves rapid, symmetrical, reliable, and smooth operation of the rapid mechanism, significantly improving the switching performance and mechanical life of the on-load tap changer, thereby meeting the requirements of precise electrical circuit execution during on-load tap changer operation and reducing the risk of switching failure.

[0063] In a specific embodiment, the drive unit 100 includes a main drive shaft 101, a driving gear 102, a driven gear 103, a camshaft 104, a guide rod bracket 105, a guide rod 106, a slider 107, a follower gear 108, and a pin 109. The camshaft 104 is designed with one end as a shaft 1041 and the other end as a cam 1042, with both ends eccentrically designed.

[0064] The main drive shaft 101 is rotatably supported on the mounting support unit 600 by bearings, serving as the input end of the entire drive unit 100 for connecting to an external power source. The drive gear 102 is fixedly mounted on the main drive shaft 101 by means of key connection or other methods.

[0065] The guide rod bracket 105 is fixedly mounted on the mounting support unit 600. Guide rods 106 (usually two rods arranged in parallel) are fixedly mounted on the guide rod bracket 105, with their axial direction perpendicular to the radial direction of the drive gear 102. The slider 107 is slidably connected to the guide rods 106 via a linear bearing or sliding sleeve, allowing it to slide only along the axial direction of the guide rods 106. The slider 107 has two grooves: a first groove 1072 is radially arranged (usually a strip groove), and a second groove (not separately labeled in the figure, located on the other side of the slider 107) is also radially arranged.

[0066] The camshaft 104 is rotatably mounted on the mounting support unit 600 via bearings. The cam end of the camshaft 104 extends into and slides within the first groove 1072 of the slider 107. The driven gear 103 is fixed to the camshaft 104 and maintains a meshing transmission relationship with the driving gear 102. The follower gear 108 is mounted on the main drive shaft 101 via bearings, allowing it to rotate freely relative to the main drive shaft 101. A pin 109 (such as a cylindrical pin) is mounted on the outer edge of the follower gear 108 and extends into and slides within the second groove of the slider 107. The pin 109 drives the follower gear 108 to oscillate back and forth according to a predetermined pattern. This reciprocating motion is the power source for subsequent forward and reverse energy storage. The main drive shaft 101 is the input end of the drive unit 100, and the follower gear 108 is the output end of the drive unit 100. The main drive shaft 101 can achieve complete symmetry in driving the camshaft 104 to rotate forward and backward.

[0067] Furthermore, in order to make reasonable use of space and achieve a compact design, the guide rod bracket 105 is a U-shaped housing with the open end of the U-shaped housing facing down and the two sides connected to the two ends of the guide rod 106 respectively. The middle section of the U-shaped housing is provided with a clearance groove for passing through the end of the camshaft 104, thereby forming a moving space inside the U-shaped housing to accommodate the slider 107.

[0068] The driving gear 102 is located at the upper end of the follower gear 108, and the first groove 1072 and the second groove are respectively formed on the upper and lower surfaces of the slider 107. The slider 107 is also provided with a guide rod hole 1071 for the guide rod 106 to pass through.

[0069] The above configuration uses the driving gear 102 and driven gear 103 as offset gears to deflect the transmission chain off the center of the mechanism, so as to satisfy the arrangement of parts such as camshaft 104, guide rod bracket 105, guide rod 106, and slider 107 within a limited space, making the overall structure compact.

[0070] Based on the above specific embodiments, the energy storage unit 200 includes a cam 202, a spring 203, a gear 204, and a fixed shaft 205. The fixed shaft 205 is fixed on the mounting support unit 600. The ends of the cam 202 and the gear 204 are connected (by a key or integral molding) and rotatably mounted on the mounting support unit 600. A connecting rod is provided on the flange of the cam 202. The two ends of the spring 203 are respectively connected to the connecting rod and the fixed shaft 205. The gear 204 maintains a meshing transmission relationship with the follower gear 108 of the drive unit 100.

[0071] Furthermore, the unlocking and release unit 300 is used to receive a trigger signal and release energy to drive an external load when the energy storage reaches its limit. Specifically, the unlocking and release unit 300 includes a roller 301, a boss shaft 302, a boss gear 303, and a swing gear 304. The locking unit 400 is an elastic reset mechanism, and the fixed end of the elastic reset mechanism is fixed to the mounting support unit 600.

[0072] Roller 301 is located at the movable end of the elastic reset mechanism. Boss shaft 302 is rotatably mounted on the mounting support unit 600. The bosses of boss gear 303 and boss shaft 302 are coaxially fixed below gear 204 and rotate together with gear 204. The shaft end of boss shaft 302 passes through boss gear 303, gear 204, and cam 202 in sequence, providing axial support.

[0073] The swing gear 304 is rotatably mounted on the main drive shaft 101, and its height position corresponds to that of the boss gear 303. The swing gear 304 is preferably a sector gear structure, and the two sides of the sector structure are provided with slots for connecting with the pawl 403.

[0074] The movable ends of the two elastic reset mechanisms are used to lock when the balance wheel gear 304 swings to the forward lock position and the reverse lock position, respectively. When the energy storage unit 200 has finished storing energy and needs to be unlocked, the slider 107 can push the roller 301 of the corresponding elastic reset mechanism to unlock the movable end of the elastic reset mechanism from the balance wheel gear 304.

[0075] After the energy storage unit 200 has finished storing energy, the slider 107 pushes the roller 301 of the unlocking and releasing unit 300 to unlock, thereby releasing the limit between the swing wheel gear 304 and the locking unit 400 (i.e., the pawl 403). The cam 202 quickly drives the boss gear 303 to rotate via the boss shaft 302, completing the energy release. In the above setting, unlocking and releasing are completed in stages, i.e., the process of "energy storage" - "unlocking" - "release". In addition, unlocking is driven slowly and at a fixed point by the slider 107, without the need for an additional intermediate shift fork structure, resulting in precise action and reliable structure.

[0076] Specifically, the slider 107 is also provided with an unlocking drive block 1073, which is used to trigger the unlocking release unit 300 at a predetermined position during the reciprocating motion. The unlocking drive block 1073 on the slider 107 pushes the roller 301, and at the same time transmits cam power to the follower gear 108, and also performs the unlocking function of the unlocking release unit 300.

[0077] The energy storage unit 200 also includes a support frame 201, which is spaced apart from the fixed shaft 205 and fixed to the mounting support unit 600. The cam 202 and gear 204 are rotatably mounted on the support frame 201. Specifically, the cam 202, gear 204, and boss shaft 302 are fixed together, with the boss shaft 302 acting as a link between the energy storage unit 200 and the unlocking / releasing unit 300. The boss shaft 302 serves as the first support, and the support frame 201 as the second support, increasing the axial support force of the cam 202 and gear 204. The support frame 201 provides centering support for the middle of the gear 204, ensuring the support point does not interfere with the spring energy storage and release process. This compact structure further enhances structural stability.

[0078] In a further specific embodiment, two locking units 400 are symmetrically arranged and located at the two extreme ends of the swing trajectory of the balance wheel gear 304 (i.e., the forward locking position and the reverse locking position), respectively, to lock the balance wheel gear 304 after the switching action is completed.

[0079] Specifically, the locking unit 400 includes a rotating shaft 401, a mounting base 402, a pawl 403, and a compression spring 404. One end of the mounting base 402 is hinged to the mounting support unit 600 via the rotating shaft 401 and can swing around the rotating shaft 401. The other end of the mounting base 402 is elastically connected to the pawl 403 via the compression spring 404. The end of the pawl 403 is designed as a hook-shaped structure that can engage with the groove at the end of the balance wheel gear 304. The pawl 403 is used to engage with the end of the balance wheel gear 304, and the roller 301 is rotatably mounted on the pawl 403. Two sets of locking units 400 are arranged symmetrically and are used for forward and reverse locking, respectively. Locking can be performed when the balance wheel gear 304 in the unlocking and release unit 300 reaches a new position.

[0080] The mounting base 402 and the chuck 403 are designed separately, which facilitates processing and ensures high assembly precision.

[0081] In a specific embodiment, two buffer units 500 are symmetrically arranged on both sides of the swing path of the swing wheel gear 304, located before the locked position, to absorb the remaining energy at the end of the action.

[0082] Specifically, the buffer unit 500 includes a buffer seat 501, a buffer spring, and a striker 502. The buffer seat 501 is mounted on the mounting support unit 600. The two ends of the buffer spring are connected to the buffer seat 501 and the striker 502, respectively. The buffer seat 501 has a receiving cavity for mounting the buffer spring and an opening for the striker 502 to extend and retract. The protruding end of the striker 502 faces the swing path of the balance wheel gear 304, which is used to buffer the swing of the balance wheel gear 304 at the extreme end, prevent overshoot and rebound, and realize the reliable locking of the locking unit 400.

[0083] Based on the above specific embodiments, the mounting support unit 600 forms a receiving cavity, within which the drive unit 100, energy storage unit 200, unlocking and releasing unit 300, locking unit 400, and buffer unit 500 are all disposed. The mounting support unit 600 has an integral receiving cavity inside, used to integrate all other functional units of the mounting and protection mechanism. The walls of the receiving cavity are provided with multiple precisely machined mounting holes and bearing seats to ensure accurate positioning of each unit. This arrangement effectively prevents external dust, oil, and foreign objects from entering, avoiding interference with precision-fitted moving parts (such as gears, cams, and slides). It is particularly suitable for on-load tap changers in environments where oil or dust may be present, greatly improving the environmental adaptability and operational reliability of the mechanism.

[0084] Furthermore, the mounting support unit 600 includes a lower flange 601, an upper flange 602, and multiple support legs 603, which are respectively connected between the lower flange 601 and the upper flange 602. The main structure, composed of the lower flange 601, upper flange 602, and multiple support legs 603, forms a highly rigid spatial frame. This structure can effectively resist the enormous internal impact forces and vibrations generated when the mechanism releases and locks its energy instantaneously, preventing deformation of the support structure.

[0085] The mounting support unit 600 also includes a bearing mounting seat 604, which is fixed to the lower flange 601. Together, they form the first mounting reference, while the upper flange 602 serves as the second mounting reference. The first mounting reference is used to position and install the core rotating shaft system (such as the main drive shaft 101, camshaft 104, etc.), serving as the base for the entire mechanism's movement. The second mounting reference can be used to install and position other related components, such as the guide rod bracket 105, support frame 201, and buffer seat 501. This design allows for step-by-step assembly, with clear references, improving assembly efficiency.

[0086] In particular, in the above specific embodiment, the camshaft 104 is cleverly designed with one end being a shaft 1041 and the other end being a cam 1042. The two are eccentrically designed to form a camshaft structure, which connects the driven gear 103 and the slider 107.

[0087] The slider 107 is cleverly designed, including a guide rod hole 1071, a first slide groove 1072 that engages with the cam, and an unlocking drive block 1073. It transmits power from the cam 1042 to the follower gear 108 and also performs the unlocking function of the unlocking release unit 300.

[0088] The driving gear 102 and driven gear 103 are cleverly configured as offset gears to deviate the transmission chain from the center of the mechanism, so as to meet the arrangement of parts such as camshaft 104, guide rod bracket 105, guide rod 106, and slider 107 within a limited space, resulting in a compact overall structure.

[0089] In summary, the working process of the above-mentioned quick-connect mechanism for on-load tap changers is as follows:

[0090] 1. In the drive unit 100: External power drives the main drive shaft 101 to rotate, which in turn drives the drive gear 102 to rotate, thereby driving the driven gear 103 and the camshaft 104 meshing with it to rotate. The cam end of the camshaft 104 slides in the first groove 1072 of the slider 107. Due to the constraint of the guide rod 106, the rotational motion of the cam end forces the slider 107 to reciprocate linearly along the guide rod 106. At the same time, the reciprocating motion of the slider 107 acts on the pin 109 through its second groove, thereby driving the follower gear 108 to reciprocate at a certain angle. Due to the design of the cam profile and gear transmission, the reciprocating oscillation output by the follower gear 108 is completely symmetrical. Thus, the drive unit 100 completes the transformation from continuous rotation to symmetrical reciprocating oscillation.

[0091] 2. In the energy storage unit 200: The reciprocating oscillation of the follower gear 108 drives the meshing gear 204 to reciprocate. The gear 204 drives the cam 202, which is rigidly connected to it, to oscillate synchronously. When the cam 202 oscillates, it stretches (or compresses) the spring 203 through the connecting rod on it, causing it to deform and store energy. When the cam 202 oscillates to the "dead point" position of its motion trajectory (i.e., the point of maximum mechanical benefit or the limit point of energy storage), energy storage is completed.

[0092] 3. In the unlocking and releasing unit 300: The unlocking of the unlocking and releasing unit 300 is triggered by the slider 107 of the drive unit 100 according to a predetermined timing sequence. As mentioned above, the slider 107 is provided with an unlocking drive block 1073. When the energy storage unit 200 has finished storing energy (i.e., the cam 202 reaches near the "dead point"), the slider 107 also moves to the corresponding end position of its stroke. At this time, the unlocking drive block 1073 on the slider 107 pushes the roller 301 on the corresponding side.

[0093] 4. In the locking unit 400: In the initial or locked state, the elastic force of the compression spring 404 causes the pawl 403 to tend to swing towards the balance wheel gear 304, and its hook-shaped end engages in the slot of the balance wheel gear 304 to achieve locking. When unlocking is required, the unlocking drive block 1073 of the slider 107 pushes the roller 301, forcing the pawl 403 to overcome the elastic force of the compression spring 404 and swing outward around the rotating shaft 401, causing its hook-shaped end to disengage from the slot of the balance wheel gear 304 and release the lock.

[0094] 5. In the buffer unit 500: When the balance wheel gear 304 swings at high speed toward the end point under the drive of energy release, its side will strike the corresponding side striker 502. The striker 502 is compressed back, compressing the buffer spring, converting the remaining kinetic energy of the balance wheel gear 304 into the elastic potential energy of the buffer spring and dissipating it, so that the balance wheel gear 304 decelerates smoothly, creating conditions for subsequent reliable locking.

[0095] 6. With continued external power input, the drive unit 100 drives the energy storage unit 200 to begin reverse energy storage, preparing for the next switch in the opposite direction. The entire mechanism repeats continuously, achieving continuous and reliable switching of the on-load tap changer.

[0096] In summary, the on-load tap changer quick-release mechanism of this case is a set of action devices that integrates power transmission, motion conversion, energy storage, precise unlocking, energy release, and reliable locking, capable of completing a predetermined sequence of actions. The drive unit 100, as the power receiving and motion conversion part of the quick-release mechanism, uses a "cam-slider" mechanism as its core component to convert rotary motion into reciprocating motion, used to drive the energy storage unit 200 to store energy in the forward or reverse direction, and also performs the unlocking function of the unlocking and release unit 300. The energy storage unit 200 uses a cam-over-dead-point spring mechanism; driven by the drive unit 100, the spring deforms and stores energy. The unlocking and release unit 300 works in conjunction with the energy storage unit 200 to precisely unlock and quickly release after the energy storage step. The locking unit 400 and buffer unit 500 are also included. The buffer unit 500 is used to recover residual energy after release, achieving the purpose of "fast release, slow stop," to ensure stable locking of the locking unit 400 and reduce motion impact. The mounting support unit 600 is used for the installation and support of the components in the above units.

[0097] This invention is based on the project "On-load tap changer for converter transformers". It aims to circumvent existing intellectual property barriers and supplement the deficiencies of existing technologies. It provides a new type of fast mechanism with reliable structure and accurate switching, which solves the problem of tap changer switching failure caused by the fast mechanism, so as to meet the product requirements of "On-load tap changer for converter transformers".

[0098] Furthermore, the present invention provides an on-load tap changer, including the quick-connect mechanism for on-load tap changers in the above-described specific embodiments. Obviously, the on-load tap changer including the aforementioned quick-connect mechanism for on-load tap changers has the same beneficial effects, and will not be elaborated upon here.

[0099] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0100] In the description of this application, "multiple" means two or more. If "first" or "second" is mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0101] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0102] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0103] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0104] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A quick-connect mechanism for an on-load tap changer, characterized in that, include: Drive unit (100), energy storage unit (200), unlocking and release unit (300), two locking units (400), two buffer units (500) and mounting support unit (600); The drive unit (100), the energy storage unit (200), the unlocking and releasing unit (300), the locking unit (400), and the buffer unit (500) are all disposed on the mounting support unit (600); The input end of the drive unit (100) is rotatable and is mounted on the mounting support unit (600) for receiving an external power source to achieve rotation. The output end of the drive unit (100) is used to convert the rotational motion of the input end into reciprocating motion. The reciprocating motion of the output end of the drive unit (100) is completely symmetrical. The input end of the energy storage unit (200) is connected to the output end of the drive unit (100) for receiving the power transmitted by the drive unit (100) for energy storage and energy release. The unlocking and release unit (300) is used to cooperate with the energy storage unit (200) to unlock according to a predetermined sequence to release energy. The output end of the unlocking and release unit (300) is used to output power to the outside to realize the switching of on-load tap changer. The two locking units (400) are symmetrically arranged at the forward locking position and the reverse locking position of the output end of the unlocking and releasing unit (300), respectively, for locking after the unlocking and releasing unit (300) is released to the preset position; The two buffer units (500) are symmetrically arranged on both sides of the output end of the unlocking and releasing unit (300) to recover the remaining energy after the unlocking and releasing unit (300) releases.

2. The quick-connect mechanism for on-load tap changers according to claim 1, characterized in that, The drive unit (100) includes a main drive shaft (101), a drive gear (102), a driven gear (103), a camshaft (104), a guide rod bracket (105), a guide rod (106), a slider (107), a follower gear (108), and a pin (109). The main drive shaft (101) is rotatably mounted on the mounting support unit (600). The drive gear (102) is fixed on the main drive shaft (101). The guide rod bracket (105) is fixed on the mounting support unit (600). The guide rod (106) is fixed on the guide rod bracket (105). The slider (107) is slidably connected to the guide rod (106). The slider (107) has a first groove (1072) and a second groove arranged radially. The end of the camshaft (104) is rotatably mounted on the mounting support unit (600). The driven gear (103) is slidably disposed in the first slide groove (1072), the driven gear (103) is fixed to the shaft end of the camshaft (104) and meshes with the driving gear (102) for transmission, the follower gear (108) is mounted on the main drive shaft (101) through a bearing, the pin (109) is mounted on the outer edge of the follower gear (108) and is used to slide and cooperate with the second slide groove of the slider (107) to drive the follower gear (108) to rotate, the main drive shaft (101) is the input end of the drive unit (100), and the follower gear (108) is the output end of the drive unit (100).

3. The quick-connect mechanism for on-load tap changers according to claim 2, characterized in that, The guide rod bracket (105) is a U-shaped housing. The open end of the U-shaped housing faces downward and the two sides are respectively connected to the two ends of the guide rod (106). The middle section of the U-shaped housing is provided with a clearance groove for passing through the end of the camshaft (104). The driving gear (102) is located at the upper end of the follower gear (108), and the first groove (1072) and the second groove are respectively opened on the upper and lower surfaces of the slider (107).

4. The quick-connect mechanism for on-load tap changers according to claim 2, characterized in that, The energy storage unit (200) includes a cam (202), a spring (203), a gear (204), and a fixed shaft (205). The fixed shaft (205) is fixed to the mounting support unit (600). The cam (202) and the gear (204) are fixedly connected and rotatably connected relative to the mounting support unit (600). A connecting rod is provided on the flange of the cam (202). The two ends of the spring (203) are respectively connected to the connecting rod and the fixed shaft (205). The gear (204) meshes with the follower gear (108) for transmission.

5. The quick-connect mechanism for on-load tap changers according to claim 4, characterized in that, The unlocking and releasing unit (300) includes a roller (301), a boss shaft (302), a boss gear (303), and a swing gear (304). The locking unit (400) is an elastic reset mechanism, and the fixed end of the elastic reset mechanism is fixed to the mounting support unit (600). The roller (301) is disposed at the movable end of the elastic reset mechanism, the boss shaft (302) is rotatably mounted on the mounting support unit (600), the boss of the boss gear (303) and the boss of the boss shaft (302) are coaxially fixed below the gear (204) in sequence, the shaft end of the boss shaft (302) passes through the boss gear (303), the gear (204) and the cam (202) in sequence, and the swing wheel gear (304) is rotatably disposed on the main drive shaft (101); The movable ends of the two elastic reset mechanisms are respectively used to lock the swing wheel gear (304) when it swings to the forward lock position and the reverse lock position. When the energy storage unit (200) has finished storing energy and needs to be unlocked, the slider (107) can push the roller (301) of the elastic reset mechanism on the corresponding side, so that the movable end of the elastic reset mechanism is unlocked from the swing wheel gear (304).

6. The quick-connect mechanism for on-load tap changers according to claim 5, characterized in that, The energy storage unit (200) also includes a support frame (201), which is spaced apart from the fixed shaft (205) and fixed on the mounting support unit (600). The cam (202) and the gear (204) are rotatably mounted on the support frame (201).

7. The quick-connect mechanism for on-load tap changers according to claim 5, characterized in that, The locking unit (400) includes a rotating shaft (401), a mounting base (402), a pawl (403), and a compression spring (404). One end of the mounting base (402) is mounted on the mounting support unit (600) via the rotating shaft (401), and the other end of the mounting base (402) is connected to the pawl (403) via the compression spring (404). The pawl (403) is used to engage with the end of the swing wheel gear (304), and the roller (301) is rotatably mounted on the pawl (403).

8. The quick-connect mechanism for on-load tap changers according to claim 5, characterized in that, The buffer unit (500) includes a buffer seat (501), a buffer spring, and a ram (502). The buffer seat (501) is mounted on the mounting support unit (600). The two ends of the buffer spring are connected to the buffer seat (501) and the ram (502) respectively. The buffer seat (501) has a receiving cavity for mounting the buffer spring and an opening for the telescopic movement of the ram (502). The ram (502) is used to buffer the swing of the balance wheel gear (304) at its limit end.

9. The quick-connect mechanism for on-load tap changers according to claim 1, characterized in that, The mounting support unit (600) has a receiving cavity, and the driving unit (100), the energy storage unit (200), the unlocking and releasing unit (300), the locking unit (400) and the buffer unit (500) are all disposed in the receiving cavity.

10. The quick-connect mechanism for on-load tap changers according to claim 9, characterized in that, The mounting support unit (600) includes a lower flange (601), an upper flange (602), and a plurality of legs (603), wherein the plurality of legs (603) are respectively connected between the lower flange (601) and the upper flange (602).

11. An on-load tap changer, characterized in that, Includes the on-load tap changer quick mechanism as described in any one of claims 1-10.

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