Gearbox for on-load tap changer

Abstract

The utility model discloses a transmission device for on-load tap-changer, including drive shaft and fixed disc, the movable contact of on-load tap-changer is established on drive shaft, the bottom end rotation of drive shaft is installed on the fixed disc, drive shaft fixed connection has the pressure regulating transmission part. Belong to transmission device technical field, and specifically refers to the transmission device for on-load tap-changer.

Description

TECHNICAL FIELD

[0001] The utility model belongs to transmission device technical field, specifically point to the transmission device for on-load tap changer. BACKGROUND

[0002] On-load tap changer usually contains multiple movable contact and fixed contact. Movable contact is installed on the movable part, and is connected with operating mechanism through mechanical transmission mechanism. Fixed contact is fixed on the body of switch. In the process of voltage regulation, movable contact switches among different fixed contacts under the action of mechanical force, so as to change the connection mode of transformer winding.

[0003] But the existing on-load tap changer movable contact switches among different fixed contacts, and the transmission device is not accurate and stable. INVENTION CONTENTS

[0004] The technical problem to be solved by the utility model is that the existing on-load tap changer movable contact switches among different fixed contacts, and the transmission device is not accurate and stable.

[0005] In order to realize the above function, the technical scheme adopted by the utility model is as follows: the transmission device for on-load tap changer, including drive shaft and fixed disc, the movable contact of on-load tap changer is arranged on the drive shaft, the bottom end of drive shaft is rotatably installed on the fixed disc, and the drive shaft is fixedly connected with the voltage regulation transmission part.

[0006] Preferably, the voltage regulation transmission part includes a rotating shaft, a protractor disc and a drive wheel, the rotating shaft is vertically movably penetrated through the fixed disc, the drive wheel is penetrated on the rotating shaft and located on the upper part of the fixed disc, the protractor disc is fixedly penetrated on the drive shaft and located on the upper part of the fixed disc, the periphery of the protractor disc is provided with a limiting slot and a sliding slot, the upper part of the drive wheel is fixedly provided with a limiting wheel coaxial with the drive wheel and intermittently clamped into the limiting slot, the upper part of the drive wheel is provided with an extension column intermittently sliding into the sliding slot, and the bottom of the rotating shaft 3 is provided with a transmission part.

[0007] Preferably, the limiting slot is provided in arc-shaped structure, and the limiting wheel is provided with a groove corresponding to the limiting slot.

[0008] Preferably, the transmission part includes a driving gear, a driven gear and a connecting shaft, the connecting shaft is vertically and rotatably penetrated on the fixed disc, the driving gear is fixedly penetrated on the lower end of the connecting shaft, the driven gear is fixedly penetrated on the lower end of the rotating shaft, the driving gear is engaged with the driven gear 13, and the connecting shaft and the fixed disc are provided with a power part.

[0009] Preferably, the power element comprises a driving motor, a worm gear and a worm, the fixed disc is provided with a support plate on the lower end surface, the worm is rotatably arranged on the inner side surface of the support plate through one end thereof, the worm gear is fixedly arranged on the connecting shaft and located at the lower part of the driven gear, the worm gear is engaged with the worm, the driving motor is arranged on the support plate, the driving motor is arranged on the outer side surface of the support plate, and the output end of the driving motor is rotatably arranged through the support plate and connected to the end of the worm.

[0010] Preferably, the fixed disc is provided with a plurality of mounting holes.

[0011] The utility model discloses take above -mentioned structure and obtain beneficial effect as follows: start driving motor, drive worm rotation, worm drive worm gear rotation, worm gear drives connecting shaft rotation, connecting shaft drives driving gear rotation, driving gear drives driven gear rotation, because worm gear has greater transmission ratio, it can convert motor's high -speed low torque output into low -speed high torque output, provides enough driving force for the switching of movable contact, if need to improve the switching speed of movable contact, driving gear and driven gear can be designed into acceleration gear set between, if need more fine control or need to reduce the speed to increase torque, driving gear and driven gear can be designed into reduction gear set between, thereby improve the accuracy and stability when driving. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the whole structure schematic of the utility model embodiment Figure 1 ;

[0013] Figure 2 It is the whole structure schematic of the utility model embodiment Figure 2 ;

[0014] Figure 3 It is the whole structure schematic of the utility model embodiment Figure 3 ;

[0015] Figure 4 It is the whole structure schematic of the utility model embodiment Figure 4 ;

[0016] Among them, 1, driving shaft, 2, fixed disc, 3, pivot, 4, protractor, 5, driving wheel, 6, limit slot, 7, sliding slot, 8, limit wheel, 9, extension column, 10, transmission element, 11, recess, 12, driving gear, 13, driven gear, 14, connecting shaft, 15, power element, 16, driving motor, 17, worm gear, 18, worm, 19, support plate, 20, mounting hole, 21, on-load tap changer. DETAILED DESCRIPTION

[0017] The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0018] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance. The present application will be further described in detail below in connection with the drawings.

[0019] As shown in Figures 1-4 The present application provides a transmission device for a load tap changer, which comprises a driving shaft 1 and a fixed disc 2, a plurality of mounting holes 20 are arranged on the fixed disc 2, a movable contact of the load tap changer is arranged on the driving shaft 1, the bottom end of the driving shaft 1 is rotatably installed on the fixed disc 2, and a voltage regulating transmission member is fixedly connected to the driving shaft 1.

[0020] As shown in Figure 1 The voltage regulating transmission member comprises a rotating shaft 3, an index plate 4 and a driving wheel 5, the rotating shaft 3 is vertically movably penetrated through the fixed disc 2, the driving wheel 5 is penetrated on the rotating shaft 3 and located at the upper part of the fixed disc 2, the index plate 4 is fixedly penetrated on the driving shaft 1 and located at the upper part of the fixed disc 2, a limiting groove 6 and a sliding groove 7 are arranged at the peripheral position of the index plate 4, a limiting wheel 8 coaxial with the driving wheel 5 and intermittently clamped into the limiting groove 6 is fixedly arranged at the upper part of the driving wheel 5, an extension column 9 is arranged at the upper part of the driving wheel 5 and close to the edge position thereof and is intermittently slid into the sliding groove 7, the limiting wheel 8 and the extension column 9 rotate synchronously with the driving wheel 5, when the extension column 9 rotates and slides into the sliding groove 7, the extension column 9 drives the index plate 4 to rotate, and a transmission member 10 is arranged at the bottom of the rotating shaft 3.

[0021] As shown in Figure 2 The limiting groove 6 is arranged in an arc structure, a groove 11 corresponding to the limiting groove 6 is arranged on the limiting wheel 8, the extension column 9 and the groove 11 are on the same diameter of the driving wheel 5, and the groove 11 is arranged to facilitate the extension column 9 to drive the index plate 4 to rotate.

[0022] The transmission member 10 drives the rotating shaft 3 to rotate, the rotating shaft 3 drives the driving wheel 5 to rotate, the limiting wheel 8 on the wall of the driving wheel 5 and the extension column 9 rotate synchronously, when the extension column 9 slides into the sliding groove 7, the index plate 4 is driven to rotate, after the extension column 9 on the driving wheel 5 slides out of the sliding groove 7, the index plate 4 is locked in the limiting groove 6 away from the arc edge of the recess 11 to lock the rotation of the index plate, the intermittent rotation is realized, the moving contact is switched between the multiple fixed contacts to realize the voltage regulation.

[0023] As shown in Figures 3-4 The transmission member 10 includes a driving gear 12, a driven gear 13 and a connecting shaft 14, the connecting shaft 14 is vertically and rotatably arranged on the fixed disc 2, the driving gear 12 is fixedly arranged on the lower end of the connecting shaft 14, the driven gear 13 is fixedly arranged on the lower end of the rotating shaft 3, the driving gear 12 is engaged with the driven gear 13, and the connecting shaft 14 and the fixed disc 2 are provided with a power member 15.

[0024] As shown in Figure 4 The power member 15 includes a driving motor 16, a worm gear 17 and a worm 18, the fixed disc 2 is provided with a support plate 19 on the lower end surface, the worm 18 is rotatably arranged on the inner side surface of the support plate 19 through one end thereof, the worm gear 17 is fixedly arranged on the connecting shaft 14 and located below the driven gear 13, the worm gear 17 is engaged with the worm 18, the driving motor 16 is arranged on the support plate 19, the driving motor 16 is arranged on the outer side surface of the support plate 19, the output end of the driving motor 16 is rotatably arranged through the support plate 19 and connected to the end of the worm 18, the driving motor 16 is started to drive the worm 18 to rotate, the worm 18 drives the worm gear 17 to rotate, the worm gear 17 drives the connecting shaft 14 to rotate, the connecting shaft 14 drives the driving gear 12 to rotate, the driving gear 12 drives the driven gear 13 to rotate, because the worm gear 17 and the worm 18 have a large transmission ratio, the high-speed low-torque output of the driving motor 16 is converted into low-speed high-torque output, enough driving force is provided for the switching of the moving contact, if it is needed to improve the switching speed of the moving contact, the driving gear 12 and the driven gear 13 can be designed as an acceleration gear set; if it is needed to control more finely or to reduce the speed to increase the torque, the driving gear 12 and the driven gear 13 can be designed as a reduction gear set.

[0025] The driving motor 16 is started to drive the worm 18 to rotate, the worm 18 drives the worm gear 17 to rotate, the worm gear 17 drives the connecting shaft 14 to rotate, the connecting shaft 14 drives the driving gear 12 to rotate, the driving gear 12 drives the driven gear 13 to rotate, the driven gear 13 drives the rotating shaft 3 to rotate, the rotating shaft 3 drives the driving wheel 5 to rotate, the limiting wheel 8 on the driving wheel 5 cooperates with the limiting groove 6 and the sliding groove 7 on the index plate 4 to drive the index plate 4 to rotate intermittently, then the moving contact on the driving wheel 5 is switched with the multiple fixed contacts on the tap switch to realize the voltage regulation.

[0026] Because the worm gear 17 worm 18 has a large transmission ratio, it can convert the high speed low torque output of the drive motor 16 into a low speed high torque output, providing sufficient driving force for the switching of the moving contact, if it is necessary to increase the switching speed of the moving contact, or to control more finely, the diameter ratio between the driving gear 12 and the driven gear 13 can be changed to design an acceleration gear set or a deceleration gear set.

[0027] The above describes the utility model and its implementation, this kind of description is not restrictive, the embodiment of the utility model shown in the drawing is only one, the actual structure is not limited to this. In general, if the ordinary skilled in the art is inspired, without departing from the utility model creation tenet, not creative design is similar to the structure mode and the embodiment of this technical solution, all should belong to the protection scope of the utility model.

Claims

1. A transmission for a load tap changer, characterized by: The on-load tap changer comprises a driving shaft and a fixing disc, the movable contact of the on-load tap changer is arranged on the driving shaft, the bottom end of the driving shaft is rotatably installed on the fixing disc, and the driving shaft is fixedly connected with a voltage regulating transmission member.

2. Gear unit for a load tap changer according to claim 1, characterized in that The voltage regulating transmission member comprises a rotating shaft, a indexing disc and a driving wheel, the rotating shaft is vertically movably penetrated through the fixing disc, the driving wheel is penetrated on the rotating shaft and located on the upper part of the fixing disc, the indexing disc is fixedly penetrated on the driving shaft and located on the upper part of the fixing disc, the periphery of the indexing disc is provided with a limiting slot and a sliding slot, the upper part of the driving wheel is fixedly provided with a limiting wheel coaxial with the driving wheel and intermittently clamped in the limiting slot, the upper part of the driving wheel and close to the edge thereof is provided with an extending column intermittently sliding into the sliding slot, and the bottom of the rotating shaft is provided with a transmission member.

3. Gear unit for a load tap changer according to claim 2, characterized in that The limiting slot is in an arc structure, and the limiting wheel is provided with a groove corresponding to the limiting slot.

4. The gear unit for a load tap changer according to claim 2, characterized in that: The transmission member comprises a driving gear, a driven gear and a connecting shaft, the connecting shaft is vertically and rotatably penetrated on the fixing disc, the driving gear is fixedly penetrated on the lower end of the connecting shaft, the driven gear is fixedly penetrated on the lower end of the rotating shaft, the driving gear is engaged with the driven gear, and the connecting shaft and the fixing disc are provided with a power member.

5. Gear unit for a load tap changer according to claim 4, characterized in that The power member comprises a driving motor, a worm wheel and a worm, the fixing disc is provided with a support plate on the lower end face, the worm is rotatably arranged on the inner side face of the support plate through one end thereof, the worm wheel is fixedly penetrated on the connecting shaft and located on the lower part of the driven gear, the worm wheel is engaged with the worm, the driving motor is arranged on the support plate, the driving motor is arranged on the outer side face of the support plate, the output end of the driving motor is rotatably penetrated through the support plate and connected with the end part of the worm.

6. The gear unit for a load tap changer according to claim 3, characterized in that: The fixing disc is provided with a plurality of mounting holes.

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