A tap changer electric mechanism

Abstract

The application provides a tapping switch electric mechanism, which comprises a machine box and the following rotating output shaft, speed reduction mechanism, driving motor, position display and gear signal transmission device and intelligent controller which are respectively installed in the machine box; the position display and gear signal transmission device comprises a rack, worm, rotating input shaft, step signal switch, display disc driving transmission mechanism, display disc mechanism, contact signal disc driving transmission mechanism, low gear contact signal switching mechanism and high gear contact signal switching mechanism; the application can provide reliable mechanical contact signal for multi-gear products; integrates various models of tapping switch electric mechanism boxes and their special designs; the product has few specifications, modular design, is convenient for standardized production management, production management and low manufacturing cost; meanwhile, the application provides single product for users, which is convenient for users to use and replace, reduces product use requirements and failure rate caused by improper use.

Description

Technical Field

[0001] This invention belongs to the field of transformer tap changer accessories, and specifically relates to an electric mechanism for a tap changer. Background Technology

[0002] The electric mechanism of a tap changer provides power for the tap changer's tapping action under load, accurately controls and switches tap positions, and easily displays the tap changer's current status. Due to the varying requirements of transformers for voltage regulation levels, remote and local control, and the complex electric field environment surrounding them, the transmission and control systems of the electric mechanism for tap changers are typically quite complex. To accommodate the different requirements of various transformer tap changers, manufacturers often categorize these requirements and produce several models of electric mechanisms. Even so, the various mechanical control mechanisms, signal extraction, display, transmission, feedback, mechanical deceleration, and electrical control systems of the electric mechanism for tap changers remain complex, with many special specifications and diverse components, which hinders production management, increases manufacturing costs, and leads to frequent malfunctions.

[0003] Currently, the electric mechanisms for conventional tap changers on the market have tended towards modular design, mainly including a housing, drive motor, reduction gearbox, position display and gear signal transmission device, and intelligent controller. However, electric mechanisms for multi-gear (36-108 gears) tap changers require special design. These types of electric mechanisms lack a reliable mechanical signal source, have diverse and unattractive gear display dials, unreliable step signals provided by cam-driven limit switches, high production costs, poor adaptability to the humid and salt spray environments of offshore projects, and unstable performance. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a tap changer electric mechanism that can adapt to the different requirements of various transformer tap changers, has reliable multi-position (36-108 positions) mechanical signal contacts, a single and aesthetically pleasing position display panel, low manufacturing cost, and reliable and stable performance.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] An electric mechanism for a tap changer includes a housing, and the following components respectively installed within the housing: a rotary output shaft, a reduction mechanism, a drive motor, a position display and gear signal transmission device, and an intelligent controller. One end of the rotary output shaft extends out of the housing and is driven by the tap changer, while the other end is driven by the position display and gear signal transmission device. The reduction mechanism is driven by the middle portion of the rotary output shaft. The drive motor is driven by the reduction mechanism. The intelligent controller is electrically connected to both the drive motor and the position display and gear signal transmission device. The position display and gear signal transmission device includes:

[0007] A frame is fixedly connected to the reduction mechanism and serves as a mounting base.

[0008] A worm gear is rotatably mounted inside the frame, with its upper end extending out of the top of the frame and coaxially connected to the rotary output shaft.

[0009] A rotary input shaft is rotatably mounted in the frame perpendicular to the worm gear, and a turbine gear meshing with the worm gear is provided on the rotary input shaft.

[0010] A contact signal disk drives a transmission mechanism, which is connected to the rear end of the rotary input shaft for transmission, and is used to control the switching angle between the low-level contact signal switching mechanism and the high-level contact signal switching mechanism.

[0011] A low-level contact signal switching mechanism, the low-level contact signal switching mechanism comprising:

[0012] A low-gear contact signal disk, which is an insulating plate fixed to the rear end of the frame; a circular hole is opened in the middle of the low-gear contact signal disk; multiple stationary contacts and a ring-shaped common contact are evenly arranged around the circular hole on the low-gear contact signal disk, each stationary contact corresponds to a gear, and each stationary contact and the common contact are electrically connected to the intelligent controller through wires.

[0013] A rear drive shaft is provided, the front end of which is connected to the contact signal disk drive transmission mechanism, and the rear end of which passes through the round hole in the middle of the low gear contact signal disk and extends to the rear side of the low gear contact signal disk.

[0014] A moving contact support is provided, which is located behind the low-gear contact signal disk and fixed on the rear drive shaft. Two mutually connected moving contacts are provided on the front side of the moving contact support at the position corresponding to the stationary contact.

[0015] As the rear drive shaft rotates, the moving contact support drives the second moving contact on it to rotate. One of the second moving contacts is always in contact with the common contact, while the other second moving contact is in contact with or separates from the stationary contact in turn.

[0016] A high-level contact signal switching mechanism, the high-level contact signal switching mechanism comprising:

[0017] Two front and rear structural plates are arranged one after the other; the front structural plate is fixedly connected to the low-gear contact signal disk by multiple studs and the moving contact support is rotatably installed between the front structural plate and the low-gear contact signal disk; the rear end of the rear drive shaft rotatably extends between the front and rear structural plates.

[0018] A drive wheel is located between the front structural plate and the rear structural plate and is fixed on the rear drive shaft. A rotating arm is fixed on the outer periphery of the drive wheel. The drive wheel can rotate under the drive of the rear drive shaft and drive the rotating arm to rotate. A roller is fixed on the front side of the rotating arm.

[0019] A stationary contact insulation support is fixed to the front side of the rear structural plate;

[0020] A rotating shaft, the two ends of which are rotatably mounted on the front structural plate and the rear structural plate and located between the drive wheel and the stationary contact insulation support;

[0021] A high-position contact signal disk, wherein the high-position contact signal disk is located between the stationary contact insulation support and the front structure plate and is fixed on the rotating shaft;

[0022] A grooved wheel, which is fixed on a rotating shaft and located between the stationary contact insulation support and the high-position contact signal disk, has multiple radial grooves on its outer circumference;

[0023] A moving contact group, wherein the moving contact group is disposed on the high-position contact signal disk and can rotate with the high-position contact signal disk, the moving contact group includes a first moving contact and a second moving contact arranged side by side, one end of the first moving contact and the second moving contact are connected by a wire, and the other end of the two contacts are respectively in contact with the stationary contact insulation support and slide along the upper surface of the stationary contact insulation support as the high-position contact signal disk rotates; and,

[0024] A stationary contact group is disposed on a stationary contact insulation support and located below the moving contact group. The stationary contact group includes a first stationary contact, a second stationary contact, a third stationary contact, and a fourth stationary contact that do not contact each other. The installation positions of the first, second, and third stationary contacts coincide with the sliding path of the first moving contact on the stationary contact insulation support, and the three can alternately contact the first moving contact. The installation position of the fourth stationary contact coincides with the sliding path of the second moving contact on the stationary contact insulation support, and the fourth stationary contact always maintains contact with the second moving contact.

[0025] When the second moving contact of the moving contact support rotates back from the highest position stationary contact one on the low position contact signal disk to the first position stationary contact one, the rear drive shaft drives the drive wheel to rotate and makes the rotating arm on the drive wheel just rotate below the grooved wheel, and the roller on the rotating arm tangentially enters a radial groove in the grooved wheel, causing the grooved wheel to rotate. At the same time, the grooved wheel drives the high position contact signal disk to rotate through the rotating shaft, causing the first moving contact to slide from the first stationary contact to the second stationary contact or from the second stationary contact to the first stationary contact, or to slide from the second stationary contact to the third stationary contact or from the third stationary contact to the second stationary contact.

[0026] The low-level contact signal switching mechanism (or 1-36 level primary contact signal disk mechanism) and the high-level contact signal switching mechanism (or 37-108 level secondary contact signal disk mechanism) of this invention adopt an independent modular design. The high-level contact signal switching mechanism uses a Geneva wheel mechanism to drive the moving contact, which is simple in structure and accurate in positioning, and is designed as a standard module. Conventionally, only the low-level contact signal switching mechanism is used for levels 1 to 36. For levels greater than 36, the high-level contact signal switching mechanism is connected to the low-level contact signal switching mechanism for joint use. This simplifies the mechanism, standardizes the tap changer electric mechanism box, reduces the number of tap changer electric mechanism box models and specifications and special designs, lowers manufacturing costs, and improves product reliability.

[0027] Furthermore, the contact signal disk drive transmission mechanism includes:

[0028] Two mounting plates, a first mounting plate and a second mounting plate, are arranged one behind the other and are connected and fixed together by multiple studs. The first mounting plate is fixed inside the rear end of the frame and located behind the turbine, while the second mounting plate is located behind the first mounting plate. A through hole is opened on the first mounting plate, and the rear end of the rotary input shaft extends through the through hole to the space between the first mounting plate and the second mounting plate.

[0029] A drive gear is fixed to the rear end of the rotary input shaft and located between the first mounting plate and the second mounting plate.

[0030] A gear shaft is rotatably mounted between a first mounting plate and a second mounting plate, wherein the gear shaft extends rearward to the rear side of the second mounting plate and is coaxially connected to the front end of the rear drive shaft.

[0031] Two double gears, a fourth and a fifth, are mounted between the first and second mounting plates; the rear gear of the fourth double gear meshes with the gear teeth on the gear shaft, the front gear of the fourth double gear meshes with the rear gear of the fifth double gear, and the front gear of the fifth double gear meshes with the drive gear.

[0032] Furthermore, 36 stationary contacts are evenly arranged around the circular hole on the low-gear contact signal disk. Each stationary contact corresponds to one gear. The interval between two adjacent stationary contacts is 10°. When the tap changer electric mechanism switches gears, the rotary input shaft drives the transmission mechanism through the contact signal disk to rotate the rear transmission shaft. The rear transmission shaft then drives the moving contact support to rotate 10°. The moving contact two set on the moving contact support rotates 10°, connecting the stationary contact one corresponding to the next gear and the common contact. This provides the intelligent controller with the next gear signal. After receiving the accurate signal, the intelligent controller makes the corresponding control.

[0033] When the moving contact of the moving contact support rotates 10° from the 36th stationary contact on the low-gear contact signal disk to the 1st stationary contact, the rear drive shaft drives the drive wheel to rotate and makes the rotating arm on the drive wheel just rotate below the grooved wheel. The roller on the rotating arm tangentially enters a radial groove in the grooved wheel, causing the grooved wheel to rotate. At the same time, the grooved wheel drives the high-gear contact signal disk to rotate 60° through the rotating shaft. This causes the first moving contact of the moving contact group at the bottom of the high-gear contact signal disk to slide from the first stationary contact to the second stationary contact or from the second stationary contact to the third stationary contact. At the same time, the gear progression signal is transmitted to the intelligent controller through the wire, which means that the gear progresses from 1-36 to 37-72 or from 37-72 to 73-108.

[0034] Furthermore, the position display and gear signal transmission device also includes a step signal switch, which is installed inside the front end of the frame and located in front of the turbine. This step signal switch controls the tap changer electric mechanism to complete one gear shift. The step signal switch includes:

[0035] A contact insulator is mounted on a frame. Two signal contacts are mounted on the contact insulator. A moving contact is mounted on the end of each signal contact facing the inside of the frame. A signal line is connected to the end of each signal contact facing the outside of the frame and is electrically connected to the intelligent controller through the signal line.

[0036] An insulating rotating component is provided, with one end fixed to a rotary input shaft and the other end fixed with a conductive copper block corresponding to the position of the two moving contacts. The insulating rotating component can rotate with the rotary input shaft, so that the conductive copper block periodically contacts the two moving contacts (using floating contacts) simultaneously, thereby connecting the two signal lines.

[0037] The stepped signal switch of this invention uses two floating contacts (moving contact one) to replace the original limit switch, and a conductive copper sheet (brass sheet) with good conductivity is set at the end of the insulating rotating part to replace the original cam. This avoids the step signal error caused by the deformation of the roller lever after long-term operation of the limit switch, which leads to the continuous operation of the tap changer electric mechanism box (commonly known as slipping) and the inability to stop immediately after switching to the position. This improves the reliability of the product and reduces the cost.

[0038] Furthermore, the position display and gear signal transmission device also includes a display disk drive transmission mechanism and a display disk mechanism.

[0039] The display disk drive transmission mechanism includes:

[0040] Two support plates, a first support plate and a second support plate, are arranged one in front of the other. The first support plate and the second support plate are connected and fixed together by multiple studs. The edge of the first support plate is fixed to the front end of the frame and located in front of the progressive signal switch. The second support plate is located between the first support plate and the progressive signal switch.

[0041] A front drive shaft is rotatably mounted on a first support plate and a second support plate. The front end of the front drive shaft extends forward beyond the first support plate, and the rear end of the front drive shaft extends backward beyond the second support plate.

[0042] A drive gear is fixed to the rear end of the front drive shaft and located between the second support plate and the progressive signal switch.

[0043] Three double gears—a first double gear, a second double gear, and a third double gear—are mounted on a first support plate and a second support plate. The axle of the first double gear is rotatably mounted on the second support plate and is coaxially connected to the front end of the rotary input shaft. The rear gear of the first double gear is located between the second support plate and the progressive signal switch and meshes with the driving gear. The front gear of the first double gear is located between the first and second support plates. The second and third double gears are both rotatably mounted between the first and second support plates. The rear gear of the second double gear meshes with the front gear of the first double gear, and the front gear of the second double gear meshes with the rear gear of the third double gear.

[0044] A driven gear is located between the first support plate and the second support plate and meshes with the front gear of the third double gear. The driven gear has a hole in the middle and is rotatably sleeved on the outside of the front drive shaft. The front side of the driven gear extends forward and penetrates the first support plate before being rotatably mounted on the first support plate.

[0045] The display panel mechanism for displaying gear positions includes:

[0046] A gear position display panel is fixed to the front side of a first support plate by multiple studs. A through hole is opened in the center of the gear position display panel, and the front end of the front drive shaft extends to the front side of the gear position display panel through the through hole. A rotation number indicator scale composed of the rotation number values ​​of multiple rotating output shafts is provided around the through hole on the front side wall of the gear position display panel. A gear position value display ring composed of multiple gear position values ​​is arranged concentrically outside the rotation number indicator scale.

[0047] A drive disc is sleeved outside the front drive shaft and located between the gear display disc and the first support plate. The rear end of the drive disc is fixed on the front end of the driven gear and rotates with the driven gear.

[0048] A drive tube is sleeved outside the front drive shaft, with its rear end fixed on the drive disc and its front end passing through the through hole in the middle of the gear position display disc and extending to the front side of the gear position display disc.

[0049] A short pointer; the short pointer is located in front of the gear position display panel and fixed to the front end of the front drive shaft. The short pointer can rotate with the front drive shaft in front of the gear position display panel and point to the value of the rotation number scale, expressing the current number of rotations of the output shaft.

[0050] A long pointer is located in front of the gear position display panel and fixed to the front end of the drive tube. The long pointer can rotate with the drive tube in front of the gear position display panel and point to the value on the gear position value display ring to express the current gear position value.

[0051] Furthermore, the diameter of the rear gear of the first double gear is equal to the diameter of the driving gear.

[0052] Furthermore, the position display and gear signal transmission device also includes a transparent cover plate, which is installed on the front side of the display panel mechanism by multiple screws. This is used to protect the short and long pointers.

[0053] Furthermore, the front structural plate, rear structural plate, first mounting plate, second mounting plate, first support plate, and second support plate are all insulating plates.

[0054] Furthermore, a ring of 33-division scale is provided around the through hole on the front side wall of the gear position display panel. Each division line represents one rotation of the output shaft, and the short pointer indicates the current number of rotations.

[0055] Furthermore, a ring of 108 recessed grooves is evenly and concentrically arranged outside the rotation indicator scale to display the gear position value. Each recessed groove has an adhesive gear position value attached to it, allowing the long pointer to express the current gear position value.

[0056] The tap changer electric mechanism described in this invention has an elegant and attractive appearance, and reliable and stable performance. It provides reliable mechanical contact signals for multi-position products. It integrates various models of tap changer electric mechanism boxes and their special designs into one unit. The product has fewer component specifications and a modular design, facilitating standardized production management, production management, and reducing manufacturing costs. Simultaneously, it provides users with a single product, facilitating compatible and replaceable use, reducing user requirements, and lowering the failure rate due to improper use. Attached Figure Description

[0057] The present invention will now be described in further detail with reference to the accompanying drawings.

[0058] Figure 1 This is a front view of the tap changer electric mechanism described in this invention;

[0059] Figure 2 for Figure 1 Left view of the position display and gear signal transmission device;

[0060] Figure 3 for Figure 2 Left view of the middle position display and gear signal transmission device located on the front side of the worm gear;

[0061] Figure 4 for Figure 3 The front view of the position display and gear signal transmission device after removing the front part of the progressive signal switch structure;

[0062] Figure 5 This is a left view of the display disk drive transmission mechanism in the position display and gear signal transmission device of the present invention;

[0063] Figure 6 for Figure 5 The main view of the central display disk drive transmission mechanism after the first support plate has been removed;

[0064] Figure 7 for Figure 5 Rear view of the central display disk drive transmission mechanism after the first support plate has been removed;

[0065] Figure 8 This is a schematic diagram of the contact signal disk drive transmission mechanism described in this invention;

[0066] Figure 9 This is a left view of the combination of the low-level contact signal switching mechanism and the high-level contact signal switching mechanism described in this invention.

[0067] Figure 10 A top view of the high-level contact signal switching mechanism after removing the front and rear structural plates;

[0068] Figure 11The front view of the high-level contact signal switching mechanism after removing the front and rear structural plates;

[0069] Figure 12 The rear view of the high-level contact signal switching mechanism after removing the front and rear structural plates;

[0070] Figure 13 A schematic diagram of the structure of the stationary contact insulation support in the high-level contact signal switching mechanism;

[0071] The diagram shows: 1-Chassis, 2-Rotary output shaft, 3-Reduction mechanism, 4-Drive motor, 5-Position display and gear signal transmission device, 501-Frame, 502-Worm gear, 503-Rotary input shaft, 504-Turbine, 505-Progressive signal switch, 506-Display panel drive transmission mechanism, 507-Display panel mechanism, 508-Contact signal panel drive transmission mechanism, 509-Low gear contact signal switching mechanism, 510-High gear contact signal switching mechanism, 511-Transparent cover, 6-Intelligent controller, 7-Electrical components. Detailed Implementation

[0072] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0073] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0074] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1

[0075] like Figure 1 As shown, an electric tap changer mechanism of the present invention includes a housing 1 leading to a door; a rotary output shaft 2, a reduction mechanism 3, a drive motor 4, a position display and gear signal transmission device 5, an intelligent controller 6, and an electrical component 7 are respectively installed inside the housing 1.

[0076] The chassis 1 serves as the main load-bearing structure. Chassis 1 and the door are constructed from stainless steel plates through stretching, bending, and welding. This results in good stability and resistance to deformation after forming, along with a sophisticated, attractive, and high-end appearance. It also exhibits strong corrosion resistance in humid and salt spray environments. The chassis 1 and door feature a U-shaped bending structure and are sealed with gaskets, providing excellent waterproofing. The chassis 1 and door boast a high production qualification rate and low overall manufacturing cost.

[0077] The rotary output shaft 2 is rotatably mounted inside the housing 1, and the upper end of the rotary output shaft 2 extends out of the housing 1 and is connected to the tap changer via a transmission.

[0078] The reduction mechanism 3 is installed inside the housing 1 and is connected to the rotary output shaft 2 for transmission. The reduction mechanism 3 includes a partition, a drive pulley, a driven pulley, and a connecting belt. The partition is horizontally fixed on the upper part of the inner side of the housing. The drive pulley and the driven pulley are rotatably mounted on the upper part of the partition. The connecting belt is connected between the drive pulley and the driven pulley for transmission. The drive pulley is fixed on the rotary output shaft 2, and the driven pulley is fixed on the rotating shaft of the drive motor 4. The diameter of the drive pulley is larger than that of the driven pulley.

[0079] The drive motor 4 is installed at the bottom of the partition inside the housing 1. The rotating shaft of the drive motor 4 passes through the partition upwards and is fixedly connected to the driven pulley of the reduction mechanism 3. The drive motor 4 and the reduction mechanism 3 are used to drive the rotary output shaft 2 to rotate.

[0080] The intelligent controller 6 is a conventional controller, and is electrically connected to the drive motor 4 and the position display and gear signal transmission device 5 respectively. The intelligent controller 6 includes a CPU chip, a memory, and a display. The CPU chip is used to receive the status information of the tap position of the tap switch and to output instructions to control the tap switch. The memory is used to store data related to adjusting the tap position. The display is connected to the extended parallel port of the CPU and is used to display the current tap position and instructions.

[0081] The electrical section 7 provides various signal contacts and enables electrical control, such as various conventional electrical components (e.g., terminals, circuit breakers, fuses).

[0082] The position display and gear signal transmission device 5 is connected to the rotary output shaft 2 via a transmission connection. The position display and gear signal transmission device 5 is the core mechanism of the tap changer electric mechanism. It has the same function as the traditional tap changer electric mechanism (but the structure is different). It can clearly and accurately display the position numbers and the position indication. It can accurately provide various contact signals to the intelligent controller 6, the terminal block and other functional modules.

[0083] like Figure 2 As shown, the position display and gear signal transmission device 5 includes: a frame 501, a worm gear 502, a rotary input shaft 503, a progressive signal switch 505, a display disk drive transmission mechanism 506, a display disk mechanism 507, a contact signal disk drive transmission mechanism 508, a low gear contact signal switching mechanism 509, and a high gear contact signal switching mechanism 510.

[0084] like Figure 2 As shown, the top of the frame 501 is fixedly connected to the partition of the reduction mechanism 3 by multiple studs, serving as the mounting base, and is integrally molded from engineering plastic.

[0085] like Figure 2 As shown, the worm gear 502 is vertically rotatably mounted inside the frame 501. Its upper end extends out of the top of the frame 501 and is coaxially connected to the lower end of the rotary output shaft 2 (the lower end of the rotary output shaft 2 passes downward through a partition and is coaxially connected to the upper end of the worm gear). The lower end of the worm gear 502 can be manually driven for manual control of gear shifting in case of power failure or malfunction.

[0086] like Figure 2 As shown, the rotary input shaft 503 is rotatably mounted in the frame 501 perpendicular to the worm 502. A turbine 504 meshes with the worm 502 on the rotary input shaft 503. The worm 502 drives the turbine 504 to rotate under the drive of the rotary output shaft 2, thereby driving the rotary input shaft 503 to rotate.

[0087] like Figure 3 and Figure 4 As shown, the step signal switch 505 is installed inside the front end of the frame 501 and located in front of the turbine 504, and is used to control the tap changer electric mechanism to complete one gear shift. The step signal switch 505 includes a contact insulator 5051 and an insulated rotating member 5054.

[0088] like Figure 4 As shown, the contact insulator 5051 is mounted on the frame 501. Two signal contacts 5052 are mounted on the contact insulator 5051. A moving contact 5053 is mounted on the end of each signal contact facing the inside of the frame. A signal line (for outputting signals) is soldered to the end of each signal contact 5052 facing the outside of the frame 501. The signal contacts 5052 are electrically connected to the intelligent controller 6 through the signal line.

[0089] like Figure 4 As shown, one end of the insulating rotating member 5054 is fixed on the rotary input shaft 503, and the other end is fixed with a conductive copper block 5053 corresponding to the position of the two moving contacts 5053; the insulating rotating member 5054 can rotate with the rotary input shaft 503, so that the conductive copper block 5053 periodically contacts the two moving contacts 5053 at the same time, so that the two signal lines are connected.

[0090] The moving contact 5053 on the contact insulator 5051 adopts a telescopic floating contact structure, which is integrated with the signal contact 5052 (the two are connected by a spring). The two sets of telescopic floating contacts (moving contact 5053) are respectively set in two preset holes in the contact insulator 5051 (the spring is set inside, the signal contact 5052 is fixed in the hole, and the moving contact 5053 can float and extend and retract in the hole, extending or retracting into the hole), so that the telescopic floating contact (moving contact 5053) can extend and retract back and forth. The step-by-step operation control steps of the tap changer electric mechanism of the present invention are as follows: start operation → the two signal contacts 5052 are disconnected → the conductive copper block 5053 rotates with the rotary input shaft 503 → after one rotation, the conductive copper block 5053 reconnects the two signal contacts 5052 → after receiving the signal, the intelligent controller 6 immediately controls the drive motor 4 to stop running, thereby completing one gear shift.

[0091] The stepped signal switch 505 uses two telescopic floating contacts (moving contact 5053) to replace the original limit switch. A conductive copper block 5053 (brass sheet) with good conductivity is set at the end of the insulating rotating part 5054 to replace the original cam. This avoids the step signal error caused by the deformation of the roller lever after long-term operation of the limit switch, which leads to the continuous operation of the tap changer electric mechanism box (commonly known as slipping) and the inability to stop immediately after switching to the position. This improves the reliability of the product and reduces the cost.

[0092] like Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 As shown, the display disk drive transmission mechanism 506 employs a three-stage gear transmission, converting 33 rotational movements into rotations of 10 degrees or 3.3 degrees, achieving a pointer rotation of 10 degrees or 3.3 degrees per gear shift (long pointer 5075 rotates 3.3 degrees, short pointer 5074 rotates 10 degrees). This design reduces the size of components, integrating them into a single unit. The display disk drive transmission mechanism 506 includes:

[0093] Two supporting plates, 5061 and 5062, arranged one behind the other (both being insulating plates), are shown below. Figure 5 As shown, the first support plate 5061 and the second support plate 5062 are connected and fixed together by multiple studs (thus forming a gear mounting space between them). The edge of the first support plate 5061 is fixed to the front end of the frame 501 and located in front of the progressive signal switch 505. The second support plate 5062 is located between the first support plate 5061 and the progressive signal switch 505.

[0094] A front drive shaft 5063, such as Figure 5 As shown, the front drive shaft 5063 is rotatably mounted on the first support plate 5061 and the second support plate 5062. The front end of the front drive shaft 5063 extends forward beyond the first support plate 5061 (for mounting the short pointer 5074), and the rear end of the front drive shaft 5063 extends backward beyond the second support plate 5062.

[0095] One drive gear 5064, such as Figure 7 As shown, the drive gear 5064 is fixed to the rear end of the front drive shaft 5063 and located between the second support plate 5062 and the progressive signal switch 505. The diameter of the drive gear 5064 is equal to the diameter of the rear gear of the first double gear, ensuring that the short pointer 507 rotates synchronously with the rotary input shaft 503.

[0096] Three double gears—a first double gear 5065, a second double gear 5066, and a third double gear 5067—are mounted on the first support plate 5061 and the second support plate 5062. (A double gear is two gears fixed together on the same axis.) Figure 5 and Figure 6As shown, the axle of the first double gear 5065 is rotatably mounted on the second support plate 5062. The axle of the first double gear 5065 is coaxially connected to the front end of the rotary input shaft 503. The rear gear of the first double gear 5062 (the gear near the progressive signal switch 505) is located between the second support plate 5062 and the progressive signal switch 505 and meshes with the drive gear 5064 (ensuring that the short pointer 5074 rotates synchronously with the rotary input shaft 503). The front gear of the first double gear 5065 is located between the first support plate 5061 and the second support plate 5062. Between the support plates 5062; the second double gear 5066 and the third double gear 5067 are rotatably mounted between the first support plate 5061 and the second support plate 5062. The rear gear of the second double gear 5066 (the gear on the side closer to the second support plate 5062) meshes with the front gear of the first double gear 5065. The front gear of the second double gear 5066 (the gear on the side closer to the first support plate 5061) meshes with the rear gear of the third double gear 5067 (the gear on the side closer to the second support plate 5062).

[0097] A driven gear 5068, such as Figure 5 and Figure 6 As shown, the driven gear 5068 is located between the first support plate 5061 and the second support plate 5062 and meshes with the front gear of the third double gear 5067 (the gear on the side closer to the first support plate 5061). The driven gear 5068 has a hole in the middle and is rotatably sleeved on the outside of the front drive shaft 5063. The front side of the driven gear 5068 extends forward and penetrates the first support plate 5061 (turning outward to form a disc with a diameter larger than the opening in the middle of the first support plate 5061, which is used to connect the drive disc 5072) and is rotatably mounted on the first support plate 5061.

[0098] like Figure 2 and Figure 3 As shown, the display panel mechanism 507 includes:

[0099] First gear display panel 5071, such as Figure 3 As shown, the gear position display dial 5071 is fixed to the front side of the first support plate 5061 by multiple studs, and adopts a concentric clock face structure. A through hole is opened in the center of the gear position display dial 5071, through which the front end of the front drive shaft 5063 extends to the front side of the gear position display dial 5071. A ring of 33-division scale markings 5076 is provided around the through hole on the front side wall of the gear position display dial 5071 (e.g., ...). Figure 1 As shown), each scale mark represents one revolution of the output shaft 2, and the short pointer 5074 indicates the current number of revolutions of the output shaft 2. A ring 5077, consisting of 108 recessed grooves, is evenly and concentrically arranged outside the revolution indicator scale 5076 to display the gear position value (as shown). Figure 1As shown in the image, each recessed groove contains an adhesive label indicating the current gear position, which is then displayed by the long pointer 5075. In practice, the corresponding gear position is affixed to the recessed groove according to user needs, eliminating the need for separately manufactured custom-made gear position dials. This reduces the number of dial specifications by nearly 100, thereby reducing the number of parts and facilitating production management. The concentric dial style gear position display is simple and intuitive.

[0100] One drive disk 5072, such as Figure 3 As shown, the drive disk 5072 is sleeved on the front drive shaft 5063 and located between the gear display disk 5071 and the first support plate 5061. The rear end of the drive disk 5072 is fixed on the front end of the driven gear 5068 (fixed on the disk on the front side of the first support plate 5061 where the front end of the driven gear 5068 extends) and rotates with the driven gear 5068.

[0101] One driver transistor 5073, such as Figure 3 As shown, the drive tube 5073 is sleeved on the outside of the front drive shaft 5063 (for mounting the long pointer 5075 and driving the long pointer 5075 to rotate), its rear end is fixed on the drive disk 5072, and its front end passes through the through hole in the middle of the gear position display disk 5071 and extends to the front side of the gear position display disk 5071.

[0102] A short pointer to 5074; for example Figure 3 As shown, the short pointer 5074 is located in front of the gear position display panel 5071 and fixed to the front end of the front drive shaft 5063. The short pointer 5074 can rotate with the front drive shaft 5063 in front of the gear position display panel 5071 and point to the value of the rotation number indicator scale 5076, expressing the current number of rotations of the output shaft 2.

[0103] A long pointer at 5075, such as Figure 3 As shown, the long pointer 5075 is located in front of the gear position display disk 5071 and fixed to the front end of the drive tube 5073. The long pointer 5075 can rotate with the drive tube 5073 in front of the gear position display disk 5071 and point to the value on the gear position value display ring 5077, expressing the current gear position value.

[0104] like Figure 2 and Figure 8 As shown, the contact signal disk drive transmission mechanism 508 adopts a three-stage gear transmission, converting 33 rotational movements into a 10-degree rotation, thereby achieving a 10-degree rotation of the lower-gear contact signal disk 5091 and the moving contact support 5093. This design reduces the size of components and integrates them into a single unit.

[0105] The contact signal disk drive transmission mechanism 508 includes:

[0106] Two mounting plates, 5081 and 5082, arranged one behind the other (both being insulating plates), are shown below. Figure 8 As shown, the first mounting plate 5081 and the second mounting plate 5082 are connected and fixed together by multiple studs (thus forming a gear mounting space between them). The first mounting plate 5081 is fixed inside the rear end of the frame 501 and located behind the turbine 504, while the second mounting plate 5082 is located behind the first mounting plate 5081. A through hole is provided on the first mounting plate 5081, through which the rear end of the rotary input shaft 503 extends between the first mounting plate 5081 and the second mounting plate 5082.

[0107] One drive gear 5083, such as Figure 8 As shown, the drive gear 5083 is fixed to the rear end of the rotary input shaft 503 and located between the first mounting plate 5081 and the second mounting plate 5082.

[0108] A gear shaft 5084 (a structure with gear teeth on the shaft), such as Figure 8 As shown, the gear shaft 5084 is rotatably mounted between the first mounting plate 5081 and the second mounting plate 5082, wherein the gear shaft 5084 extends rearward to the rear side of the second mounting plate 5082 (and is connected to the low gear contact signal switching mechanism 509).

[0109] like Figure 8 As shown, two fourth double gears 5085 and fifth double gears 5086 are installed between the first mounting plate 5081 and the second mounting plate 5082; wherein the rear gear of the fourth double gear 5085 (the gear on the side closer to the second mounting plate 5082) meshes with the gear teeth on the gear shaft 5084, the front gear of the fourth double gear 5085 meshes with the rear gear of the fifth double gear 5086, and the front gear of the fifth double gear 5086 meshes with the drive gear 5083.

[0110] like Figure 2 and Figure 9 As shown, the low-level contact signal switching mechanism 509 (or 1-36 level primary contact signal disk mechanism) includes:

[0111] A low-end contact signal panel 5091, such as Figure 9As shown, the low-gear contact signal disk 5091 is an insulating plate fixed to the rear end of the frame 501. A circular hole is opened in the center of the low-gear contact signal disk 5091. Around the circular hole on the low-gear contact signal disk 5091, 36 stationary contacts (marked as positions 1, 2, 3...36) and a ring-shaped common contact (both stationary contacts and the common contact are made of conductive copper sheet) are evenly arranged circumferentially. Each stationary contact corresponds to one gear position (a total of 36 gear positions). Each stationary contact and the common contact are electrically connected to the intelligent controller via wires. The stationary contacts on the low-gear contact signal disk 5091 are fixed with cardboard, and the stationary contacts are evenly distributed at 360° ÷ 36 = 10° circumference.

[0112] One rear drive shaft 5092, such as Figure 9 As shown, the front end of the rear drive shaft 5092 is coaxially connected to the axle of the gear shaft 5082, and the rear end of the rear drive shaft 5092 extends to the rear side of the low gear position contact signal disk 5091 after passing through the round hole in the middle of the low gear position contact signal disk 5091.

[0113] One-way contact support 5093, such as Figure 9 As shown, the moving contact support 5093 is located behind the low-position contact signal disk 5091 and fixed on the rear drive shaft 5092 (it can rotate under the drive of the rear drive shaft 5092). Two mutually communicating moving contacts are provided on the front side of the moving contact support 5093 at a position corresponding to the stationary contact group. The moving contacts on the moving contact support 5093 also adopt the same floating contact structure as the moving contact 5053 shown in the figure.

[0114] As the rear drive shaft 5092 rotates, the moving contact support 5093 drives the second moving contact on it to rotate. One of the second moving contacts is always in contact with the common contact, while the other second moving contact is in contact with or separates from the stationary contact in turn. When the second moving contact contacts one of the stationary contacts, the common contact and the stationary contact are connected through the two second moving contacts to form a circuit, and the gear position signal is provided to the intelligent controller 6 through the wire.

[0115] When the tap changer's electric mechanism switches to the next gear, the rotary input shaft 503 drives the transmission mechanism 508 and the rear transmission shaft 5092 via the contact signal disk, causing the moving contact support 5093 to rotate 10°. The moving contact 2, which is mounted on the moving contact support 5093, rotates 10°, connecting the stationary contact corresponding to the next gear, thereby providing the intelligent controller 6 with the next gear signal. After receiving the accurate signal, the intelligent controller 6 makes the corresponding control.

[0116] like Figure 2 , Figure 9-13 As shown, the high-level contact signal switching mechanism 510 (or 37-108 level secondary contact signal disk mechanism) includes:

[0117] Two front structural panels 5101 and rear structural panels 5102 arranged one behind the other (both are insulating boards); such as Figure 10-12 As shown, the front structural plate 5101 is fixedly connected to the low-gear contact signal disk 5091 by multiple studs, and the moving contact support 5093 is rotatably installed between the front structural plate 5101 and the low-gear contact signal disk 5091; the rear end of the rear drive shaft 5092 extends rotatably between the front structural plate 5101 and the rear structural plate 5102.

[0118] One drive wheel 5103, such as Figure 9-12 As shown, the drive wheel 5103 is located between the front structural plate 5101 and the rear structural plate 5102 and is fixed on the rear transmission shaft 5092. A rotating arm 5104 is fixed on the outer periphery of the drive wheel 5103. The drive wheel 5103 can rotate under the drive of the rear transmission shaft 5023 and drive the rotating arm 5104 to rotate. A roller 5105 is fixed on the front side of the rotating arm 5104.

[0119] One static contact insulation support 5106, such as Figure 9-12 As shown, the stationary contact insulation support 5106 is fixed on the front side of the rear structural plate 5102.

[0120] A rotating shaft 5107, such as Figure 10-12 As shown, the two ends of the rotating shaft 5107 are rotatably mounted on the front structural plate 5101 and the rear structural plate 5102 and are located between the drive wheel 5103 and the stationary contact insulation support 5106.

[0121] A high-level contact signal panel 5108, such as Figure 9-12 As shown, the high-position contact signal disk 5108 is located between the stationary contact insulation support 5106 and the front structure plate 5101 and is fixed on the rotating shaft 5107.

[0122] One grooved wheel 5111, such as Figure 10-12 As shown, the grooved wheel 5111 is fixed on the rotating shaft 5107 and located between the stationary contact insulation support 5106 and the high-position contact signal disk 5108. Four radial grooves are provided on the outer circumference of the grooved wheel 5111.

[0123] One-moving contact assembly 5110, such as Figure 9-13As shown, the moving contact assembly 5110 is mounted on the high-position contact signal disk 5108 and rotates with it. The moving contact assembly 5110 includes a first moving contact and a second moving contact arranged side-by-side. One end of each moving contact is connected by a wire, and the other ends respectively contact the stationary contact insulating support 5106 and slide along the upper surface of the stationary contact insulating support 5106 as the high-position contact signal disk 5108 rotates. The moving contact assembly 5110 is fixed to the high-position contact signal disk 5108 by an insulating support 5109.

[0124] A stationary contact group 5112 is disposed on a stationary contact insulation support 5106 and located below the moving contact group 5110. The stationary contact group 5112 includes a first stationary contact 5113, a second stationary contact 5114, a third stationary contact 5115, and a fourth stationary contact 5116 (all are arc-shaped conductive copper sheets, and are electrically connected to the intelligent controller 6 via wires). The installation positions of the first stationary contact 5113, the second stationary contact 5114, and the third stationary contact 5115 are similar to those of the moving contact group. The sliding path of the first moving contact 5110 on the stationary contact insulation support 5106 coincides, and all three can alternately contact the first moving contact of the moving contact group 5110; the installation position of the fourth stationary contact 5116 coincides with the sliding path of the second moving contact of the moving contact group 5110 on the stationary contact insulation support 5106 (the fourth stationary contact 5116 is also a common stationary contact, which is always in contact with the second moving contact of the moving contact group 5110), and the fourth stationary contact 5116 always maintains contact with the second moving contact of the moving contact group 5110.

[0125] When the moving contact two of the moving contact support 5093 rotates 10° from the 36th position stationary contact one on the low-position contact signal disk 5093 back to the 1st position stationary contact one, the rear drive shaft 5092 drives the drive wheel 5103 to rotate, causing the rotating arm 5104 on the drive wheel 5103 to just rotate to the rear side of the grooved wheel 5111, and causing the roller 5105 on the rotating arm 5104 to tangentially enter a radial groove in the grooved wheel 5111, thus turning the grooved wheel 5111 to rotate. At the same time, the grooved wheel 5111 drives the high-position contact signal disk 5108 to rotate 60° through the rotating shaft 5107. This causes the first moving contact to slide from the first stationary contact 5113 to the second stationary contact 5114, or to slide from the second stationary contact 5114 to the third stationary contact 5115, so that the fourth stationary contact 5116 can be connected to any one of the first stationary contact 5113, the second stationary contact 5114, and the third stationary contact 5115 through the moving contact group 5110 to form a circuit, and transmits the gear progression signal to the intelligent controller 6 through the wire, that is, the gear progresses from 1-36 to 37-72 or from 37-72 to 73-108.

[0126] The high-level contact signal switching mechanism 510 adopts binary encoding and a 36-to-1 method. The binary signal contacts on the stationary contact insulation support 5106, namely the first stationary contact 5113, the second stationary contact 5114, the third stationary contact 5115, and the fourth stationary contact 5116, are all arc-shaped. Since the fourth stationary contact 5116 always maintains contact with the second stationary contact, its connection position can be regarded as unchanged. The positions of the first stationary contact 5113, the second stationary contact 5114, and the third stationary contact 5115 are marked as position 1, position 2, and position 3, respectively. The moving contact group 5110 adopts two floating telescopic moving contacts (whose structure is similar to that of moving contact 5053) installed on the insulation support 5109. When the low-gear contact signal switching mechanism 509 (first-level contact signal disk mechanism) switches gears, its moving contact two rotates 10°, completing the first cycle from gear 1 to 36. The high-gear contact signal switching mechanism 510 (second-level contact signal disk mechanism) remains stationary at position 1. When the moving contact two of the low-gear contact signal switching mechanism 509 (first-level contact signal disk mechanism) rotates 10° from position 36 on the low-gear contact signal disk to position 1, the moving contact group 5110 of the high-gear contact signal switching mechanism 510 (second-level contact signal disk mechanism) rotates 60° to position 2 (the fourth stationary contact 5116 connects with the second stationary contact 5114 and transmits the signal to the intelligent controller 6). At this time, the intelligent controller 6 receives the signal and displays gear 37. The moving contact two of the low-gear contact signal switching mechanism 509 (first-level contact signal disk mechanism) continues to rotate to position 2. At position 36, the moving contact group 5110 of the high-level contact signal switching mechanism 510 (secondary contact signal disk mechanism) remains at position 2, with the gears sequentially being 37, 38...72; when the second moving contact of the primary contact signal disk mechanism rotates 10° from position 36 on the low-level contact signal disk 5091 to position 1 for the second time, the moving contact group 5110 of the secondary contact signal disk mechanism rotates 60° from position 2 to position 3 (the fourth stationary contact 5116 connects with the third stationary contact 5115 and transmits the signal to the intelligent controller 6). At this time, after receiving the signal, the intelligent controller determines and displays gear 73. The second moving contact of the primary contact signal disk mechanism continues to rotate to position 36 on the low-level contact signal disk 5091, and the third moving contact of the secondary contact signal disk mechanism 5110 remains at position 3, with the gears sequentially being 73, 74...108; in the reverse direction, it goes from gear 108 to gear 1. This enables the realization of multi-position mechanical contact signals, which can be used by intelligent controllers or provided to users through trusted terminal blocks to provide one-to-one mechanical signal contacts.

[0127] like Figure 1 and Figure 2As shown, each time the tap changer electric mechanism of the present invention switches gears, the intelligent controller 6 controls the drive motor 4 to start. After the drive motor 4 is decelerated by the reduction mechanism, it drives the rotary output shaft 2 to rotate, thereby driving the tap changer to switch gears.

[0128] Furthermore, the rotation of the output shaft 2 will drive the position display and gear signal transmission device 5 to operate and display the corresponding gear.

[0129] The rotation of the rotary output shaft 2 will drive the worm gear 502 to rotate, and the worm gear 502 will then drive the rotary input shaft 503 to rotate via the turbine 504.

[0130] The rotation of the rotary input shaft 503 drives the contact signal disk drive transmission mechanism 508, which in turn drives the low-gear contact signal switching mechanism 509 and the high-gear contact signal switching mechanism 510 to switch gears, realizing multi-gear mechanical contact signals, and transmitting the gear mechanical contact signals to the intelligent controller 6. Specifically, the rotation of the rotary input shaft 503 drives the multi-gear of the contact signal disk drive transmission mechanism 508 to rotate, which in turn drives the rear drive shaft 5092 to rotate and drive the moving contact support 5093 to rotate, thereby converting the 33 rotations of the rotary output shaft 2 into a 10-degree rotation of the moving contact support 5093.

[0131] On the other hand, the rotation of the rotary input shaft 503 will drive the rotation of the insulating rotating part 5054, which will cause the two signal contacts 5052 to be disconnected. The conductive copper block 5053 will rotate with the rotary input shaft 503. After one rotation, the conductive copper block 5053 will reconnect the two signal contacts 5052. After receiving the signal, the intelligent controller 6 will immediately control the drive motor 4 to stop running, thereby completing one gear shift.

[0132] Simultaneously, the rotation of the rotary input shaft 503 also drives the multi-gear structure of the drive transmission mechanism 506 to rotate. The rotary input shaft 503 first drives the first double gear 5065 to rotate, and simultaneously drives the drive gear 5064 and the front drive shaft 5063 to rotate. The rotation of the front drive shaft 5063 drives the short pointer 5074 to rotate, converting the 33 rotations of the rotary output shaft 2 into a 10-degree rotation, which is indicated by the short pointer 5074 in conjunction with the rotation count scale 5076. The rotation of the first double gear 5065 then sequentially drives the second double gear 5066, the third double gear 5067, the drive disk 5072, the drive tube 5073, and the long pointer 5075 to rotate, converting the 33 rotations of the rotary output shaft 2 into a 3.3-degree rotation of the long pointer 5075 (one gear), which is indicated by the long pointer 5075 in conjunction with the gear value display ring 5077. Example 2

[0133] The difference between this embodiment and Embodiment 1 is that:

[0134] The position display and gear signal transmission device also includes a transparent cover plate, which is installed on the front side of the display panel mechanism by multiple screws to protect the short pointer and the long pointer.

[0135] Other aspects of this invention that are not detailed herein are all conventional techniques known to those skilled in the art.

[0136] It should be noted that the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0137] The scope of protection of this invention is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this invention shall fall within the scope of protection of this invention.

Claims

1. A tap changer electric mechanism, comprising a housing, and the following components respectively installed within the housing: a rotary output shaft, a reduction mechanism, a drive motor, a position display and gear signal transmission device, and an intelligent controller; one end of the rotary output shaft extends out of the housing and is drivenly connected to the tap changer, and the other end is drivenly connected to the position display and gear signal transmission device; the reduction mechanism is drivenly connected to the middle of the rotary output shaft; the drive motor is drivenly connected to the reduction mechanism; the intelligent controller is electrically connected to both the drive motor and the position display and gear signal transmission device. Its features are: The position display and gear signal transmission device includes: A frame, which is fixedly connected to the reduction mechanism, serves as a mounting base; A worm gear, which is rotatably mounted inside the frame, with its upper end extending out of the top of the frame and coaxially connected to the rotary output shaft; A rotary input shaft is rotatably mounted in the frame perpendicular to the worm gear, and a worm wheel that meshes with the worm gear is provided on the rotary input shaft; A contact signal disk drives a transmission mechanism, which is connected to the rear end of the rotary input shaft for transmission, and is used to control the switching angle between the low-level contact signal switching mechanism and the high-level contact signal switching mechanism. A low-level contact signal switching mechanism, the low-level contact signal switching mechanism comprising: A low-gear contact signal disk, wherein the low-gear contact signal disk is an insulating plate fixed to the rear end of the frame; a circular hole is opened in the middle of the low-gear contact signal disk; multiple stationary contacts and a ring-shaped common contact are evenly arranged around the circular hole on the low-gear contact signal disk, each stationary contact corresponds to a gear, and each stationary contact and the common contact are electrically connected to the intelligent controller through wires respectively. A rear drive shaft, the front end of which is connected to the contact signal disk drive transmission mechanism, and the rear end of which passes through the round hole in the middle of the low gear contact signal disk and extends to the rear side of the low gear contact signal disk. A moving contact support is provided, which is located behind the low-gear contact signal disk and fixed on the rear drive shaft. Two mutually connected moving contacts are provided on the front side of the moving contact support, corresponding to the position of the stationary contact one. As the rear drive shaft rotates, the moving contact support drives the second moving contact on it to rotate. One of the second moving contacts is always in contact with the common contact, while the other second moving contact is in contact with or separates from the first stationary contact in turn. A high-level contact signal switching mechanism, the high-level contact signal switching mechanism comprising: A front structural plate and a rear structural plate are arranged one in front of the other; the front structural plate is fixedly connected to the low-gear contact signal disk by multiple studs and the moving contact support is rotatably installed between the front structural plate and the low-gear contact signal disk; the rear end of the rear drive shaft extends rotatably between the front structural plate and the rear structural plate. A drive wheel is located between the front structural plate and the rear structural plate and is fixed on the rear drive shaft. A rotating arm is fixed on the outer periphery of the drive wheel. The drive wheel can rotate under the drive of the rear drive shaft and drive the rotating arm to rotate. A roller is fixed on the front side of the rotating arm. A stationary contact insulation support is fixed to the front side of the rear structural plate; A rotating shaft, the two ends of which are rotatably mounted on the front structural plate and the rear structural plate and located between the drive wheel and the stationary contact insulation support; A high-position contact signal disk, wherein the high-position contact signal disk is located between the stationary contact insulation support and the front structure plate and is fixed on the rotating shaft; A grooved wheel, which is fixed on a rotating shaft and located between the stationary contact insulation support and the high-position contact signal disk, has multiple radial grooves on its outer circumference; A moving contact group, wherein the moving contact group is disposed on the high-position contact signal disk and can rotate with the high-position contact signal disk, the moving contact group includes a first moving contact and a second moving contact arranged side by side, one end of the first moving contact and the second moving contact are connected by a wire, and the other end of the two contacts are respectively in contact with the stationary contact insulation support and slide along the upper surface of the stationary contact insulation support as the high-position contact signal disk rotates; and, A stationary contact group is disposed on a stationary contact insulation support and located below a moving contact group. The stationary contact group includes a first stationary contact, a second stationary contact, a third stationary contact, and a fourth stationary contact that do not contact each other. The installation positions of the first, second, and third stationary contacts coincide with the sliding path of the first moving contact on the stationary contact insulation support, and the three can alternately contact the first moving contact. The installation position of the fourth stationary contact coincides with the sliding path of the second moving contact on the stationary contact insulation support, and the fourth stationary contact always maintains contact with the second moving contact. When the second moving contact of the moving contact support rotates back from the highest position stationary contact one on the low position contact signal disk to the first position stationary contact one, the rear drive shaft drives the drive wheel to rotate and makes the rotating arm on the drive wheel just rotate below the grooved wheel, and the roller on the rotating arm tangentially enters a radial groove in the grooved wheel, causing the grooved wheel to rotate. At the same time, the grooved wheel drives the high position contact signal disk to rotate through the rotating shaft, causing the first moving contact to slide from the first stationary contact to the second stationary contact or from the second stationary contact to the first stationary contact, or to slide from the second stationary contact to the third stationary contact or from the third stationary contact to the second stationary contact.

2. The tap changer electric mechanism according to claim 1, characterized in that: The contact signal disk drive transmission mechanism includes: A first mounting plate and a second mounting plate are arranged in a front-to-back manner. The first mounting plate and the second mounting plate are connected and fixed together by multiple studs. The first mounting plate is fixed inside the rear end of the frame and located behind the worm gear. The second mounting plate is located behind the first mounting plate. A through hole is opened on the first mounting plate, and the rear end of the rotary input shaft extends through the through hole to the space between the first mounting plate and the second mounting plate. A drive gear is fixed to the rear end of the rotary input shaft and located between the first mounting plate and the second mounting plate; A gear shaft is rotatably mounted between a first mounting plate and a second mounting plate, wherein the gear shaft extends rearward to the rear side of the second mounting plate and is coaxially connected to the front end of the rear drive shaft; A fourth double gear and a fifth double gear are installed between the first mounting plate and the second mounting plate; wherein the rear gear of the fourth double gear meshes with the gear teeth on the gear shaft, the front gear of the fourth double gear meshes with the rear gear of the fifth double gear, and the front gear of the fifth double gear meshes with the drive gear.

3. The tap changer electric mechanism according to claim 2, characterized in that: On the low-gear contact signal disk, 36 stationary contacts are evenly arranged around the circular hole in a circular pattern. Each stationary contact corresponds to one gear. The interval between two adjacent stationary contacts is 10°. When the tap changer electric mechanism switches gears, the rotary input shaft drives the transmission mechanism through the contact signal disk to rotate the rear transmission shaft. The rear transmission shaft then drives the moving contact support to rotate 10°. The moving contact 2 set on the moving contact support rotates 10°, connecting the stationary contact 1 corresponding to the next gear and the common contact, thereby providing the intelligent controller with the next gear signal. After receiving the accurate signal, the intelligent controller makes the corresponding control. When the second moving contact of the moving contact support rotates 10° from the 36th position stationary contact on the low-position contact signal disk to the 1st position stationary contact, the rear drive shaft drives the drive wheel to rotate and makes the rotating arm on the drive wheel just rotate below the grooved wheel. The roller on the rotating arm enters tangentially into a radial groove in the grooved wheel, causing the grooved wheel to rotate. At the same time, the grooved wheel drives the high-position contact signal disk to rotate 60° through the rotating shaft, so that the first moving contact of the moving contact group at the bottom of the high-position contact signal disk slides from the first stationary contact to the second stationary contact or from the second stationary contact to the third stationary contact.

4. The tap changer electric mechanism according to claim 3, characterized in that: The position display and gear signal transmission device further includes a step signal switch, which is installed inside the front end of the frame and located in front of the worm gear. The step signal switch is used to control the tap changer electric mechanism to complete one gear shift. The step signal switch includes: A contact insulator is mounted on a frame. Two signal contacts are mounted on the contact insulator. A moving contact is mounted on the end of each signal contact facing the inside of the frame. A signal line is connected to the end of each signal contact facing the outside of the frame and is electrically connected to the intelligent controller through the signal line. An insulating rotating component is provided, with one end fixed to a rotary input shaft and the other end fixed with a conductive copper block corresponding to the position of the two moving contacts. The insulating rotating component can rotate with the rotary input shaft, so that the conductive copper block periodically contacts the two moving contacts simultaneously, thereby making the two signal lines conductive.

5. The tap changer electric mechanism according to claim 4, characterized in that: The position display and gear signal transmission device further includes: A display disk drive transmission mechanism, used to control the gear display of the display disk mechanism, includes: A first support plate and a second support plate are arranged in front of each other. The first support plate and the second support plate are connected and fixed together by multiple studs. The edge of the first support plate is fixed to the front end of the frame and located in front of the progressive signal switch. The second support plate is located between the first support plate and the progressive signal switch. A front drive shaft is rotatably mounted on a first support plate and a second support plate. The front end of the front drive shaft extends forward beyond the first support plate, and the rear end of the front drive shaft extends backward beyond the second support plate. A drive gear, which is fixed to the rear end of the front drive shaft and located between the second support plate and the progressive signal switch; A first double gear, a second double gear, and a third double gear are mounted on a first support plate and a second support plate, respectively. The axle of the first double gear is rotatably mounted on the second support plate and is coaxially connected to the front end of the rotary input shaft. The rear gear of the first double gear is located between the second support plate and the progressive signal switch and meshes with the drive gear. The front gear of the first double gear is located between the first and second support plates. The second and third double gears are both rotatably mounted between the first and second support plates. The rear gear of the second double gear meshes with the front gear of the first double gear, and the front gear of the second double gear meshes with the rear gear of the third double gear. A driven gear is located between the first support plate and the second support plate and meshes with the front gear of the third double gear. The driven gear has a hole in the middle and is rotatably sleeved on the outside of the front drive shaft. The front side of the driven gear extends forward and penetrates the first support plate before being rotatably mounted on the first support plate. A display panel mechanism for displaying gear positions, comprising: A gear position display panel is fixed to the front side of a first support plate by multiple studs. A through hole is opened in the center of the gear position display panel, and the front end of the front drive shaft extends to the front side of the gear position display panel through the through hole. A rotation number indicator scale composed of the rotation number values ​​of multiple rotating output shafts is provided around the through hole on the front side wall of the gear position display panel. A gear position value display ring composed of multiple gear position values ​​is arranged concentrically outside the rotation number indicator scale. A drive disc is sleeved outside the front drive shaft and located between the gear display disc and the first support plate. The rear end of the drive disc is fixed on the front end of the driven gear and rotates with the driven gear. A drive tube is sleeved outside the front drive shaft, with its rear end fixed on the drive disc and its front end passing through the through hole in the middle of the gear position display disc and extending to the front side of the gear position display disc. A short pointer; the short pointer is located in front of the gear position display panel and fixed to the front end of the front drive shaft. The short pointer can rotate with the front drive shaft in front of the gear position display panel and point to the value of the rotation number scale, expressing the current number of rotations of the output shaft. A long pointer is located in front of the gear position display panel and fixed to the front end of the drive tube. The long pointer can rotate with the drive tube in front of the gear position display panel and point to the value on the gear position value display ring to express the current gear position value.

6. The tap changer electric mechanism according to claim 5, characterized in that: The diameter of the rear gear of the first double gear is equal to the diameter of the driving gear.

7. The tap changer electric mechanism according to claim 5, characterized in that: The position display and gear signal transmission device also includes a transparent cover plate, which is installed on the front side of the display panel mechanism by multiple screws.

8. The tap changer electric mechanism according to claim 5, characterized in that: The front structural plate, rear structural plate, first mounting plate, second mounting plate, first support plate, and second support plate are all insulating plates.

9. The tap changer electric mechanism according to claim 5, characterized in that: The front side wall of the gear display panel has a ring of 33 divisions around the through hole, with each division representing one rotation of the output shaft. The short pointer indicates the current number of rotations.

10. The tap changer electric mechanism according to claim 9, characterized in that: A ring of 108 recessed grooves is evenly and concentrically arranged outside the rotation indicator scale to display the gear value. Each recessed groove has an adhesive gear value attached to it, which is used by the long pointer to indicate the current gear value.

Images