CN115831637A - Linkage device of on-load tap-changer - Google Patents

Abstract

The invention provides a linkage device of an on-load tap-changer, comprising: a fixed shaft; the two connecting rods are respectively connected with two ends of the fixed shaft in a rotatable mode, in addition, the two connecting rods are arranged in a reverse mode, the power output end and the power input end of one connecting rod are respectively arranged on the first side and the second side of the fixed shaft, and the power output end and the power input end of the other connecting rod are respectively arranged on the second side and the first side of the fixed shaft. According to the invention, the two reversely arranged connecting rods rotate around the fixed shaft respectively so as to drive the two pushing mechanisms connected with the two connecting rods to move reversely, so that the moving contact on one pushing mechanism moves back to the corresponding static contact, and the moving contact on the other pushing mechanism moves towards the corresponding static contact, thus realizing the switching of the contacts and ensuring the stability of the switching of the contacts.

Description

Linkage device of on-load tap-changer

Technical Field

The invention relates to the technical field of on-load tap-changers, in particular to a linkage device of an on-load tap-changer.

Background

An on-load tap changer is a special switch for switching the tapping of a primary or secondary winding to regulate its output voltage in the case of a transformer with a load.

At present, a combined vacuum on-load tap-changer is often used for voltage regulation of a transformer with load, and the combined vacuum on-load tap-changer generally consists of a driving mechanism, a selector and a change-over switch; the driving mechanism comprises a motor, a hand-operated operating mechanism, a brake, a counter, a position indicator, a small control switch and a set of complex transmission gears, and is used for operating the switch; the change-over switch is composed of a quick mechanism, a main on-off contact, a reciprocating mechanical contact and a transition resistor. When the combined type vacuum on-load tap-changer is used, gears are preselected by the selector firstly, and then the gears are switched by the selector switch, wherein the quick mechanism is connected with the motor to drive each contact to complete switching.

However, the existing contact in the on-load tap changer has the problem of low operation reliability, so that the switching is unstable.

Disclosure of Invention

In view of this, the invention provides a linkage device of an on-load tap-changer, and aims to solve the problem that the existing contact is low in action reliability.

The invention provides a linkage device of an on-load tap-changer, comprising: a fixed shaft; the two connecting rods are respectively connected with two ends of the fixed shaft in a rotatable mode, in addition, the two connecting rods are arranged in a reverse mode, the power output end and the power input end of one connecting rod are respectively arranged on the first side and the second side of the fixed shaft, and the power output end and the power input end of the other connecting rod are respectively arranged on the second side and the first side of the fixed shaft.

Further, in the above-mentioned on-load tap-changer linkage, the connecting rod includes: the first end of the first connecting arm is used as a power input end for connecting a driving mechanism; the second connecting arm is arranged at an included angle with the first connecting arm, the third end of the second connecting arm is connected with the first end of the first connecting arm, and the fourth end of the second connecting arm is used as a power output end to be connected with the propelling mechanism.

Further, in the linkage device of the on-load tap-changer, the second connecting arm and the first connecting arm are arranged at an obtuse angle.

Further, in the linkage device of the on-load tap-changer, the length of the second connecting arm is greater than that of the first connecting arm.

Further, according to the linkage device of the on-load tap-changer, the power input end of the connecting rod is provided with the power input shaft, the power input shaft is connected with the driving discs in a sliding mode, and the two driving discs connected with the two connecting rods synchronously rotate in the same direction and are used for driving the two connecting rods to synchronously and reversely move respectively.

Furthermore, in the linkage device of the on-load tap-changer, each of the driving disks is provided with a sliding groove, the power input shaft of the connecting rod is slidably clamped in the sliding groove, and the two corresponding sliding grooves on the two driving disks are reversely arranged.

Further, in the linkage device of the on-load tap-changer, the power output end of the connecting rod is provided with a power output shaft which is connected with the propelling mechanism in a hinged and sliding manner so as to enable the propelling mechanism and the moving contact arranged on the propelling mechanism to move close to or far away from the corresponding static contact; or the power output end of the connecting rod is provided with a power output shaft, the power output shaft is hinged with the power output end of the connecting rod, and the power output shaft is connected with the propelling mechanism in a sliding manner so as to enable the propelling mechanism and a moving contact arranged on the propelling mechanism to move close to or far away from the corresponding static contact.

Further, according to the linkage device of the on-load tap-changer, the fixing shaft is provided with the fixing plate, and the fixing plate is arranged between the two ends of the fixing shaft so as to divide the fixing shaft into two sections and be used for being connected with the two connecting plates respectively.

Further, in the linkage device of the on-load tap-changer, the fixing plate is provided with a mounting hole for mounting to the fixing device.

Furthermore, according to the linkage device of the on-load tap-changer, a rotating hole is formed between the power input end and the power output end of the connecting rod, and the connecting rod is sleeved on the fixed shaft in a rotatable mode.

According to the linkage device of the on-load tap-changer, the two connecting rods which are arranged in the opposite directions rotate around the fixed shaft respectively so as to drive the two pushing mechanisms connected with the two connecting rods to move in the opposite directions, so that the moving contact on one pushing mechanism moves back to the corresponding fixed contact, and the moving contact on the other pushing mechanism moves towards the corresponding fixed contact, so that the switching of the contacts is realized, and the stability of the switching of the contacts is ensured.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural view of a linkage of an on-load tap changer according to an embodiment of the present invention;

fig. 2 is a schematic view of a further directional structure of a linkage of an on-load tap changer according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a fixing shaft according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a propulsion mechanism according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a propulsion mechanism provided in accordance with an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a driving disc according to an embodiment of the present invention;

fig. 7 is a schematic diagram of the movement of the linkage of the on-load tap changer provided by the embodiment of the present invention;

fig. 8 is a schematic diagram of the movement of a drive disc rotating 90 ° in a linkage of an on-load tap changer according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1-2, a preferred structure of a linkage of an on-load tap changer provided by an embodiment of the present invention is shown. As shown, the linkage 1 includes: a fixed shaft 11 and two connecting rods 12; the two connecting rods 12 are respectively connected with the end portions (upper and lower ends as shown in fig. 1) of the fixed shaft 11 in a rotatable manner, and the two connecting rods 12 are arranged in a reverse direction, wherein the power output end and the power input end of one connecting rod 12 are respectively arranged on the first side and the second side of the fixed shaft 11, and the power output end and the power input end of the other connecting rod 12 are respectively arranged on the second side and the first side of the fixed shaft.

Specifically, the power output end of the upper connecting rod 12, i.e., the left end, is disposed on the left side of the fixed shaft 11, the power input end, i.e., the right end, is disposed on the right side of the fixed shaft 11, and the lower side is disposed oppositely, i.e., the power output end of the lower connecting rod 12 is disposed on the right side of the fixed shaft 11, and the power input end is disposed on the left side of the fixed shaft 11, i.e., the two ends of the two connecting rods 12 are disposed on the opposite sides of the fixed shaft 11, so that the propelling mechanisms 2 connected by the power output end are disposed on both sides, so that the moving contacts 3 disposed on the propelling mechanisms 2 are disposed on both sides, and the interference between the moving contacts 3 is avoided. In this embodiment, the two connecting rods 12 move in opposite directions synchronously, and the opposite directions are not rotation directions, but rotation of the power output end close to the static contact 4 or far from the static contact 4, that is, the power output end of one of the connecting rods 12 drives the corresponding moving contact 3 to move close to the static contact 4, and the power output end of the other connecting rod 12 synchronously drives the corresponding moving contact 3 to move far from the static contact 4, so as to implement switching of the contacts.

With continued reference to fig. 1 and 2, the connecting rod 12 includes: a first connecting arm 121 and a second connecting arm 122; wherein, the first end of the first connecting arm 121 is used as the power input end (the left end of the first connecting arm 121 of the upper connecting rod 12 shown in fig. 2) for connecting the driving disc 5; the second connecting arm 122 and the first connecting arm 121 are arranged at an included angle, a third end of the second connecting arm 122 (the left end of the second connecting arm 122 of the upper connecting rod 12 shown in fig. 2) is connected with a first end of the first connecting arm 121 (the right end of the first connecting arm 121 of the upper connecting rod 12 shown in fig. 2), and a fourth end of the second connecting arm 122 (the right end of the first connecting arm 121 of the upper connecting rod 12 shown in fig. 2) is used as a power output end for connecting the pushing mechanism 2, so that the pushing mechanism 2 pushes the movable contact 3 to move away from or close to the fixed contact 4. In specific implementation, the first connecting arm 121 and the second connecting arm 122 can be arranged at an obtuse angle, so that space can be reasonably utilized, and interference between related parts can be avoided. The first connecting arm 121 and the second connecting arm 122 may be an integral structure, or may be connected by other methods, which is not limited in this embodiment. In the present embodiment, the length of the first connecting arm 121 may be smaller than the length of the second connecting arm 122, so that the linkage mechanism 2 has a compact structure and can avoid interference between related parts.

In this embodiment, a rotation hole 123 is provided between the power input end and the power output end of the connecting rod 12, and is rotatably fitted over the fixed shaft 11. In specific implementation, the rotating hole 123 may be disposed at a connection position of the first connecting arm 121 and the second connecting arm 122, and is connected to the fixed shaft 11 in a rotatable manner, and the connecting rod 12 may rotate clockwise or counterclockwise around the fixed shaft 11 under the action of the driving mechanism, so that the fourth end of the second connecting arm 122 drives the pushing mechanism to approach or be away from the corresponding stationary contact.

With continued reference to fig. 2, the power output end of the connecting rod 12, i.e. the fourth end of the second connecting arm 122, is hinged to a power output shaft 124, and the power output shaft 124 can be connected to the propelling mechanism 2 in a hinged and sliding manner, so as to move the propelling mechanism 2 and the movable contacts 3 disposed on the propelling mechanism 2 close to or away from the corresponding stationary contacts 4. Specifically, the power output shaft 124 is rotatably and slidably clamped on the pushing mechanism 2, so that when the connecting rod 12 rotates around the fixing shaft 11, the motion of the power output shaft 124 drives the pushing mechanism 2 to perform linear motion along a direction close to or far away from the fixed contact 4; the length direction of the pushing mechanism 2 may be set in a direction close to or away from the fixed contact 4, that is, the width direction of the pushing mechanism 2 is perpendicular to the direction close to or away from the fixed contact 4, so that the power output shaft 124 rotates around the fixed shaft 11 along with the second connecting arm 122, and meanwhile, the power output shaft 124 slides relative to the pushing mechanism 2 along the width direction of the pushing mechanism 2 and drives the pushing mechanism 2 to move in the direction close to or away from the fixed contact 4, thereby realizing the movement of the pushing mechanism 2 close to or away from the fixed contact 4. Wherein, the power output shaft 124 is fixedly connected with the connecting rod 12.

Of course, in an alternative manner of this embodiment, the power output shaft 124 may also be hinged to the power output end of the connecting rod 12, i.e. the fourth end of the second connecting arm 122, and the power output shaft 124 is configured to be slidably connected to the propulsion mechanism 2, so as to move the propulsion mechanism 2 and the movable contacts 3 disposed on the propulsion mechanism 2 closer to or away from the corresponding stationary contacts 4.

With continued reference to fig. 2, the power input end of the connecting rod 12, i.e. the first end of the first connecting arm 121, is articulated with a power input shaft 125, the power input shaft 125 being used for connecting the drive disc 5. Specifically, one end of the power input shaft 125 is hinged to the first end of the first connecting arm 121, and the other end is slidably clamped on the driving disk 5, so that the first connecting arm 121 rotates around the fixed shaft 11 under the action of the driving disk 5, and further the second connecting arm 122 rotates around the fixed shaft 11, thereby realizing the movement of the propelling mechanism 2 close to or far away from the fixed contact 4. In this embodiment, the two driving discs 5 connected to the two connecting rods 12 rotate synchronously in the same direction to respectively drive the two connecting rods 12 to move synchronously in opposite directions, that is, the power output end of one of the connecting rods 12 drives the corresponding moving contact 3 to move close to the fixed contact 4, and the power output end of the other connecting rod 12 synchronously drives the corresponding moving contact 3 to move away from the fixed contact 4; wherein, two driving discs 5 can be coaxially arranged and both connected with the same driving shaft, and the two driving discs 5 are respectively positioned at two opposite sides, for example, upper and lower sides, of the two connecting rods 12 to modify the synchronous rotation in the same direction under the action of the driving shaft.

With continued reference to fig. 2 and 3, the fixing shaft 11 is provided with a fixing plate 111 for mounting on the fixing device to improve the fixing stability of the fixing shaft 11. In practical implementation, the fixing plate 111 may be disposed between two ends of the fixing shaft 11, for example, at a middle position, so that the upper and lower sides of the fixing shaft 11 are divided into two sections and are respectively connected to the two connecting rods 12, thereby avoiding interference between the two connecting rods 12.

With continued reference to fig. 3, mounting holes 1111 are provided in the mounting plate 111 for mounting to a fixture. During the concrete implementation, can be equipped with two mounting holes 1111 on the fixed plate 111, each mounting hole 1111 all can be through bolt fixed mounting on fixing device to realize the fixed of fixed plate 111 and fixed axle 11, and then realize the rotation support of two connecting rods 12.

Referring to fig. 4 to 5, a preferred structure of the advancing mechanism provided by the embodiment of the present invention is shown. As shown, the propulsion mechanism 2 includes: a pusher block 21, a pusher post 22, and a buffer spring 23; wherein, the pushing column 22 is movably connected with the pushing block 21, and an end (a left end as shown in fig. 4) of the pushing column 22 is connected with the movable contact 3 for pushing the movable contact 3 to move away from or close to the stationary contact 4; the buffer spring 23 is sleeved on the pushing column 22 and is used for applying a compression force to the pushing column 22 so as to enable the movable contact 3 to be pressed against the static contact 4.

Specifically, the side wall of the pushing block 21 is provided with a sliding clamping groove 211, and the sliding clamping groove 211 is slidably clamped on the guide rail, so that the pushing block 21 slides along the slide rail under the action of the connecting rod 12. In this embodiment, a positioning groove 212 is provided on the top wall or the bottom wall of the propulsion block 21 along the width direction thereof, and the power output shaft 124 is slidably disposed in the positioning groove 212, so that the power output shaft 124 can slide along the positioning groove 212; in this embodiment, the end of the power output shaft 124 may also be provided with a bearing, and the bearing is slidably engaged in the positioning groove 212, i.e. the power output shaft 124 may be hinged to the second connecting arm 122, or may be connected to the positioning groove 212 in a slidable and hinged manner through the bearing.

With continued reference to fig. 4 and 5, the pushing block 21 is provided with a pushing hole 213, the pushing column 22 slidably penetrates through the pushing hole 213, and the pushing column 22 is provided with a waist-shaped groove 221 along the length direction thereof; the pushing block 21 is provided with a connecting pin 24, and the connecting pin 24 is inserted into the waist-shaped groove 221 and is movably connected with the waist-shaped groove 221 so that the pushing column 22 can move relative to the pushing block 21. Specifically, the pushing hole 213 may be a through hole structure, the pushing column 22 is slidably disposed through the pushing hole 213, and the movable contact 3 is disposed at an end (a left end as shown in fig. 5) of the pushing column 22; the waist-shaped groove 221 is also disposed through the pushing column 22, so that the connecting pin 24 is slidably disposed through the pushing column 22, so that the connecting pin 24 and the pushing column 22 can slide relatively; the buffer spring 23 is sleeved on the pushing column 22 and respectively arranged between the movable contact 3 and the connecting pin 24, so that when the connecting pin 24 and the pushing column 22 integrally move along with the pushing block 21 close to the fixed contact 4, after the movable contact 3 is contacted with the fixed contact 4, the pushing block 21 continuously moves close to the fixed contact 4, and at the moment, the connecting pin 24 slides in the kidney-shaped groove 221 relative to the pushing column 22 to extrude the buffer spring 23, so that the buffer spring 23 applies an acting force to the movable contact 3, and the stability of contact connection between the movable contact 3 and the fixed contact 4 is ensured. In this embodiment, two pushing columns 22 are provided above and below each pushing block 21 to apply force to the moving contacts 3 on the upper and lower layers. In order to ensure the position consistency between the two upper and lower layers of the movable contacts 3, it is preferable that a connecting piece 25 is provided between the two pushing columns 22 to make the end positions of the two pushing columns 22 consistent, thereby ensuring the position consistency between the two movable contacts 3, and thus ensuring that the two movable contacts 3 contact with the fixed contacts 4 at the same time or are separated from each other at the same time.

Fig. 6 is a schematic structural diagram of a drive disc provided in an embodiment of the present invention. As shown in fig. 6 and 2, the driving disk 5 is provided with a sliding groove 51, and the power input end of the connecting rod 12, i.e. the power input shaft 125, is slidably engaged in the sliding groove 51, so that the connecting rod 12 rotates around the fixed shaft 11 under the action of the sliding groove 51. Specifically, the number of the sliding grooves 51 may be three, and the sliding grooves 51 are used for respectively driving the three linkages to perform synchronous motion, so that the driving disc 5 rotates under the action of the driving shaft, and then the connecting rod 12 is driven by the sliding grooves 51 to rotate around the fixed shaft 11, so that the power output end of the connecting rod 12 drives the pushing mechanism 2 to move close to or away from the corresponding static contact 4. In this embodiment, the sliding grooves 51 of the two driving disks 5 correspond to each other, and correspond to and are connected to the two connecting rods 12 of the linkage mechanism 2, so that the two connecting rods 12 move synchronously and drive the two pushing mechanisms 2 to move close to and away from the corresponding fixed contacts 4, respectively.

With continued reference to fig. 6, the slide groove 51 includes: an outer arc groove section 511 and an inner arc groove section 512 communicated with the outer arc groove section 511; the outer arc groove section 511 and the inner arc groove section 512 are both arranged along the circumferential direction of the driving disk 5, and the radius from the outer arc groove section 511 to the center of the driving disk 5 is larger than the radius from the inner arc groove section 512 to the center of the driving disk 5, so that the power output end of the connecting rod 12 is switched between the outer arc groove section 511 and the inner arc groove section 512, the distance between the power output end of the connecting rod 12 and the center of the driving disk 5 is adjusted, and the connecting rod 12 is driven to rotate.

Specifically, the inner arc groove section 512 can be communicated with the outer arc groove section 511 through the transition arc section 513, so that the connecting rod 12 is switched into the outer arc groove section 511 through the arc of the transition arc section 513 from the inner arc groove section 512, or switched into the inner arc groove section 512 through the arc of the transition arc section 513 from the inner arc groove section 511, thereby realizing the adjustment of the distance between the power input end of the connecting rod 12 and the axis of the separation disc 3, further enabling the connecting rod 12 to rotate around the axis, i.e., the fixed shaft 11, and enabling the power output end of the connecting rod 12 to move along with the connecting rod, so as to drive the propelling mechanism 2 to slide. In the present embodiment, the power input end of the upper connecting rod 12 is located at the outer arc groove section 511 of the corresponding sliding groove 51 in the upper driving disk 5, and the power input end of the lower connecting rod 12 is located at the inner arc groove section 512 of the corresponding sliding groove 51 in the lower driving disk 5; or, the power input end of the upper connecting rod 12 is located in the inner arc groove section 512 of the corresponding sliding groove 51 in the upper driving disk 5, and the power input end of the lower connecting rod 12 is located in the outer arc groove section 511 of the corresponding sliding groove 51 in the lower driving disk 5, so that when the two connecting rods 12 move synchronously, the switching directions are opposite, that is, one is switched to the inner arc groove section 512 with a small radius, and the other is switched to the outer arc groove section 511 with a large radius, so that the two propulsion mechanisms 2 move in opposite directions under the action of the power output ends of the two connecting rods 12.

In this embodiment, the corresponding sliding grooves 51 of the two driving disks 5 are disposed in a staggered and opposite direction, so that at the same time, the power input end of one connecting rod 12 is located in the outer arc groove section 511 of one sliding groove 51, and the power input end of the other connecting rod 12 is located in the inner arc groove section 512 of the other sliding groove 51, so that when the power input end of one connecting rod 12 slides from the outer arc groove section 511 to the inner arc groove section 512, the other connecting rod 12 slides from the inner arc groove section 512 to the outer arc groove section 511. For example, the power output end of the upper connecting rod 12 is clamped in the outer arc groove section 511 of the corresponding sliding groove 51 of the upper driving disk 5, the power output end of the lower connecting rod 12 is clamped in the inner arc groove section 512 of the corresponding sliding groove 51 of the lower driving disk 5, and the two driving disks 5 rotate to make the power output end of the upper connecting rod 12 slide from the outer arc groove section 511 to the inner arc groove section 512, that is, the distance between the power output end of the upper connecting rod 12 and the axis of the driving disk 5 decreases, so that the upper connecting rod 12 rotates around the fixed shaft 11, and the power output end of the upper connecting rod 12 applies an acting force to the propulsion mechanism 2, so that the propulsion mechanism 2 moves in the radial direction of the isolation disk 3 toward the direction close to the corresponding static contact 4, as shown in fig. 8, the upper connecting rod 12 can rotate clockwise, so that the movable contact 3 on the propulsion mechanism 2 gradually approaches the static contact 4; the power output end of the lower side connecting rod 12 slides from the inner arc groove section 512 to the inner arc groove section 511, that is, the distance between the power output end of the lower side connecting rod 12 and the axis of the driving disk 5 is increased, so that the lower side connecting rod 12 rotates around the fixed shaft 11, and the power output end of the upper side connecting rod 12 and the power output end of the lower side connecting rod 12 apply an acting force to the pushing mechanism 2, so that the pushing mechanism 2 moves in the direction of keeping away from the corresponding static contact 4 along the radial direction of the isolation disk 3, as shown in fig. 8, the lower side connecting rod 12 can rotate clockwise, so that the moving contact 3 on the pushing mechanism 2 is gradually kept away from the static contact 4, so that the moving contact 3 and the static contact 4 on the left side are separated, and the moving contact 3 and the static contact 4 on the right side are in contact connection, thereby realizing the switching of the phase.

As shown in fig. 1 to 2 and 4 to 5, the moving contacts 3 disposed on each propelling mechanism 2 are two layers, and certainly, the static contacts 4 are also two layers and correspond to the moving contacts 3; that is to say, under the action of the driving disc 5, the connecting rod 12 and the two propelling mechanisms 2, the four fixed contacts 4 and the four movable contacts 3 make two of the movable contacts 3 move close to the corresponding two fixed contacts 4 until the two fixed contacts are in contact connection, and the other two movable contacts 3 move away from the corresponding two fixed contacts 4 until the two fixed contacts are separated, so that the contact switching is realized. Of course, the moving contact 3 and the stationary contact 4 may also be a layer, which is not limited in this embodiment.

The working principle of the linkage is explained as follows, taking the movement of one of the connecting rods as an example:

as shown in fig. 6, in the initial position, the end of the power input shaft 125 is located within the outer arc groove segment 511; as shown in fig. 6 and 7, when the driving disc 5 rotates clockwise, the power input shaft 125 slides from the outer arc groove section 511 to the inner arc groove section 512, and each transition can be 90 °, as shown in fig. 7, so that the distance from the power input shaft 125 to the axis O of the driving disc 5 becomes smaller, and the whole connecting rod 12 rotates clockwise around the axis M of the fixed shaft 11, wherein the solid line from M to the power input shaft 125 is equivalent to the second connecting arm 122, and the dotted line from M to the power output shaft 124 is equivalent to the first connecting arm 121; the clockwise rotation of the connecting rod 12 causes the power output shaft 124 to move along with the connecting rod, and the power output shaft moves away from the axis O of the driving disc 5 in the radial direction of the driving disc 5, so that the propelling mechanism 2 moves away from the axis O of the driving disc 5 under the action of the power output shaft 124; while the power take-off shaft 124 moves along with the connecting rod 12, not only can the propulsion mechanism 2 be pushed to move away from the axis O of the driving disc 5 in the radial direction of the driving disc 5, but also the power take-off shaft 124 can slide in the positioning groove 212 of the propulsion mechanism 2 to switch from the state in fig. 6 to the state in fig. 7. In the process, while the driving disk 5 rotates clockwise, the other driving disk 5 opposite to the driving disk 5 also rotates clockwise synchronously, so that the power input shaft 125 of the other connecting rod 12 slides into the outer arc groove section 511 from the inner arc groove section 512 to move clockwise, and further the power output shaft 124 pushes the propulsion mechanism 2 to move close to the axis O of the driving disk 5 in the radial direction of the driving disk 5. Of course, when the driving disc 5 rotates counterclockwise, the power input shaft 125 is driven to move along with the driving disc 5, so that both the connecting rods 12 rotate counterclockwise, and further, the two propelling mechanisms 2 respectively move close to the axis O of the driving disc 5 and move away from the axis O of the driving disc 5 along the radial direction of the driving disc 5 under the action of the two power output shafts 124, so as to switch one of the connecting rods from the state of fig. 7 to the state of fig. 6.

In summary, in the linkage device of the on-load tap-changer provided in this embodiment, the two connecting rods 12 arranged in opposite directions rotate around the fixing shaft 11, so as to drive the two pushing mechanisms 2 connected by the two connecting rods 12 to move in opposite directions, and further, the moving contact 3 on one of the pushing mechanisms 2 moves back to the corresponding static contact 4, and the moving contact 3 on the other pushing mechanism 2 moves back to the corresponding static contact 4, thereby realizing the switching of the contacts and ensuring the stability of the switching of the contacts.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A linkage arrangement for an on-load tap changer, comprising:

a fixed shaft;

the two connecting rods are respectively connected with two ends of the fixed shaft in a rotatable mode, in addition, the two connecting rods are arranged in a reverse mode, the power output end and the power input end of one connecting rod are respectively arranged on the first side and the second side of the fixed shaft, and the power output end and the power input end of the other connecting rod are respectively arranged on the second side and the first side of the fixed shaft.

2. The on-load tap changer linkage of claim 1, wherein the connecting rod comprises:

the first end of the first connecting arm is used as a power input end and is used for connecting a driving mechanism;

the second connecting arm is arranged at an included angle with the first connecting arm, the third end of the second connecting arm is connected with the first end of the first connecting arm, and the fourth end of the second connecting arm is used as a power output end to be connected with the propelling mechanism.

3. The on-load tap changer linkage according to claim 2, characterized in that the second connecting arm and the first connecting arm are arranged at an obtuse angle.

4. The on-load tap changer linkage of claim 2, wherein the length of the second connecting arm is greater than the length of the first connecting arm.

5. On-load tap changer linkage according to one of the claims 1 to 4,

the power input end of the connecting rod is provided with a power input shaft, the power input shaft is connected with driving discs in a sliding mode, and the two driving discs connected with the two connecting rods synchronously rotate in the same direction and are used for driving the two connecting rods to synchronously and reversely move respectively.

6. On-load tap changer linkage according to claim 5,

each driving disc is provided with a sliding groove, the power input shaft of the connecting rod can be clamped in the sliding groove in a sliding way, and the two corresponding sliding grooves on the two driving discs are arranged in a reverse way.

7. On-load tap changer linkage according to one of the claims 1 to 4,

the power output end of the connecting rod is provided with a power output shaft which is connected with the propelling mechanism in a hinged and sliding manner so as to enable the propelling mechanism and a moving contact arranged on the propelling mechanism to move close to or far away from the corresponding static contact; or the like, or, alternatively,

the power output end of the connecting rod is provided with a power output shaft, the power output shaft is hinged with the power output end of the connecting rod, and the power output shaft is connected with the propelling mechanism in a sliding manner so as to enable the propelling mechanism and a moving contact arranged on the propelling mechanism to move close to or far away from the corresponding static contact.

8. On-load tap changer linkage according to one of the claims 1 to 4,

the fixing shaft is provided with a fixing plate, and the fixing plate is arranged between two ends of the fixing shaft so as to divide the fixing shaft into two sections and be used for connecting two connecting plates respectively.

9. On-load tap changer linkage according to claim 8,

the fixing plate is provided with a mounting hole for mounting on the fixing device.

10. On-load tap changer linkage according to one of the claims 1 to 4,

a rotating hole is formed between the power input end and the power output end of the connecting rod, and the connecting rod is sleeved on the fixed shaft in a rotatable mode.

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