A transformer tap changer shift sound and positioning feel device

Abstract

The present invention discloses a transformer tap switch shift in-position sound and positioning hand feeling device, characterized in that: it comprises a main shaft mounted on a support seat, the main shaft is connected to a moving contact assembly, a groove wheel is connected to one end of the main shaft, the groove wheel is configured with a shift fork mounted on the support seat to form a groove wheel shift fork mechanism, the shift fork is connected to a double boss cam mechanism, the double boss cam mechanism is matched with an elastic return mechanism, so that when shifting, the rotation of the shift fork drives the double boss cam mechanism and the elastic return mechanism to interact with each other. The present invention utilizes the interaction between the double boss cam mechanism and the elastic return mechanism to make the switch have a sense of in-position and a sound of in-position, thereby improving the reliability of the switch.

Description

Technical Field

[0001] The invention relates to the technical field of transformer tap changers, and in particular to a transformer tap changer shift-in-place sound and positioning feel device. Background Art

[0002] The existing tap changer contact structures include rolling ring structure, wedge structure, top-to-top structure and clip structure. Except for the switch body of the rolling ring structure which has the sound of shifting into place and the positioning feel, the tap changer bodies of other contact structures have no sound of shifting into place and the positioning feel. After shifting, it is not possible to intuitively determine whether the tap changer body is in place, nor is it possible to intuitively find out whether the tap changer operating mechanism and the tap changer body are installed synchronously. If the tap switch does not shift into place or the tap switch operating mechanism and the body are not installed synchronously, it will cause the tap switch to have poor contact and burn out. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a transformer tap changer shifting sound and positioning feel device in view of the deficiencies in the above-mentioned prior art.

[0004] The technical solution adopted by the present invention is: a transformer tap changer shift into place sound and positioning feel device, characterized in that: it includes a main shaft installed on a support seat, the main shaft is connected to the moving contact assembly, a groove wheel is connected to one end of the main shaft, the groove wheel is configured with a shift fork installed on the support seat, the shift fork is connected to a double-boss cam mechanism, the double-boss cam mechanism is matched with an elastic return mechanism, so that the rotation of the shift fork drives the double-boss cam mechanism and the elastic return mechanism to interact with each other.

[0005] According to the above technical solution, the double-boss cam mechanism includes a cam connected to a shift fork, the highest point of the cam is a plane or a curved surface, and bosses are symmetrically arranged on both sides of the plane or the curved surface on the cam, and the distance between the outermost periphery of the boss and the rotation center of the cam is greater than the distance between the plane or the curved surface and the rotation center of the cam.

[0006] According to the above technical solution, the cam is rectangular and eccentrically connected to the fork shaft to form a cam structure. Its adjacent sides on the outer circumference are transitionally connected by a transition arc surface, and the plane or curved surface is configured with the spring support of the elastic return mechanism.

[0007] According to the above technical solution, the boss is a boss with an outer wall in the shape of an arc.

[0008] According to the above technical solution, rollers are correspondingly arranged at each boss to form a double-roller cam mechanism.

[0009] According to the above technical solution, the cam is sleeved on the fork shaft, a through hole is provided on the cam, a pin is installed in the through hole, there is a gap margin between the pin and the through hole, and the fork drives the cam to rotate through the pin.

[0010] According to the above technical solution, the elastic return mechanism is one or more. When there is one, it is installed on the support seat and corresponds to the double-boss cam mechanism. When there are multiple, they are correspondingly installed on each groove wheel plate of the groove wheel and configured with the double-boss cam mechanism.

[0011] According to the above technical solution, the elastic return mechanism includes a spring support and a fixed support which are arranged opposite to each other and connected by a guide member, a spring is arranged between the spring support and the fixed support, the spring is sleeved on the guide member, and the spring support is configured with a double-boss cam mechanism so that the spring support can realize reciprocating motion relative to the fixed support under the action of the double-boss cam mechanism.

[0012] According to the above technical solution, the detent pin shaft is connected to the power input shaft.

[0013] According to the above technical solution, the power input shaft is connected to the detent shaft through a gear rack transmission mechanism.

[0014] According to the above technical solution, the elastic return mechanism is provided with at least one group of springs and guides, each group of springs includes at least two springs and guides, and when there are multiple groups, each group of springs and guides are arranged in sequence from top to bottom.

[0015] The beneficial effects achieved by the present invention are:

[0016] 1. The present invention combines a double-boss cam mechanism with an elastic return mechanism. The highest point of the cam is a plane or a curved surface. Arc-shaped bosses are symmetrically arranged on both sides of the plane or the curved surface on the cam. The distance between the outermost periphery of the arc-shaped boss and the rotation center of the cam is greater than the distance between the plane or the curved surface and the rotation center of the cam, so that the switch has a sense of being in place and a sound of being in place, thereby improving the reliability of the switch.

[0017] 2. By setting the bosses on both sides of the cam into roller structures, the cam and the moving contact support are in rolling friction, which further reduces the shifting torque and makes shifting easier.

[0018] 3. By setting a mounting hole on the cam and providing a clearance margin between the pin shaft and the mounting hole, the cam is not restricted by external force and automatically rebounds to the working position after passing the high point, thereby improving the feel and sound of the cam in place.

[0019] 4. The present invention can be applied to tap changers with wedge-shaped, top-to-top, and clip-type contact structures, so that the tap changer can have a sound and a positioning feel when it is shifted into place, thereby intuitively confirming that the tap changer is accurately installed and shifted into place, thereby improving the contact performance of the tap changer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of the first embodiment provided by the present invention.

[0021] Figure 2 This is the AA view of the first embodiment provided by the present invention.

[0022] Figure 3 This is a schematic structural diagram of the double boss cam mechanism and the elastic return mechanism of the first embodiment provided by the present invention.

[0023] Figures 4-1 to 4-3 This is a schematic diagram of the operation of the double-boss cam mechanism and the elastic return mechanism of the first embodiment provided by the present invention.

[0024] Figure 5 This is a front view of the second embodiment of the invention.

[0025] Figure 6 This is the BB view of the second embodiment of the invention.

[0026] Figure 7 This is a front view of the third embodiment provided by the present invention.

[0027] Figure 8 This is the CC view of the third embodiment provided by the present invention. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Embodiment 1:

[0030] like Figure 1 , Figure 2As shown, this embodiment provides a transformer tap switch shifting sound and positioning feel device, including a main shaft 13 installed on a support seat, the main shaft 13 is connected to a moving contact assembly, an insulating rod 12 is provided on the support seat, a static contact assembly is provided on the insulating rod 12, the moving contact assembly is matched with the static contact assembly (static contact assembly and moving contact assembly are omitted in the figure), and a groove wheel 1 is connected to the upper end of the main shaft 13, wherein the groove wheel 1 is fixedly connected to the main shaft 13. The groove wheel 1 is configured with a fork 2 installed on the support seat to form a groove wheel fork mechanism, the fork 2 is connected to the input shaft 4, and its power is input through the input shaft 4, and an operating mechanism (operating mechanism omitted in the figure) is installed on the upper part of the input shaft 4, driving the fork 2 to rotate, the fork drives the groove wheel 1 to rotate, the groove wheel is rigidly connected to the output main shaft 13 and rotates synchronously, and the output main shaft drives the moving contact assembly to rotate to realize the shift of the tap switch. The shift fork is connected to the double boss cam mechanism, and the double boss cam mechanism is matched with the elastic return mechanism, so that when shifting, the rotation of the shift fork drives the double boss cam mechanism and the elastic return mechanism to interact with each other, thereby producing a sound and a positioning feel.

[0031] The double-boss cam mechanism includes a cam 5 mounted on the fork shaft, wherein the highest point of the cam 5 is a plane or a curved surface, and arc-shaped bosses (similar to cylindrical curved surfaces) are symmetrically arranged on both sides of the plane or the curved surface on the cam 5, and the distance between the outermost periphery of the arc-shaped boss and the rotation center of the cam is greater than the distance between the plane or the curved surface and the rotation center of the cam, so that the switch has a sense of being in place and a sound of being in place. Among them, there are at least two arc-shaped bosses. In this embodiment, the cam can be of various shapes. This embodiment is described by taking a rectangular cam as an example. The two adjacent sides of the outer wall are connected by a transition arc surface, and the cam end face between the two bosses on the cam 5 is planar, so that it has a better sense of being in place and a sound of being in place. Figure 4-1-4-3 As shown, the distance L1 between the outermost periphery of the arc-shaped boss (ie, located at 45° in the horizontal or longitudinal direction of the boss) and the rotation center of the cam is greater than the distance L2 between the plane or curved surface and the rotation center of the cam.

[0032] In this embodiment, in order to reduce the shifting torque, the sliding friction between the boss and the elastic support seat of the elastic return mechanism can be changed into rolling friction, that is, the bosses on both sides of the cam are set as roller structures to form a double-roller cam structure, that is, two rollers 7 are set, and the rollers 7 are installed on the cam 5 through the roller shaft 6. By setting the bosses on both sides of the cam as roller structures, the friction between the cam and the elastic support seat can be made rolling friction, further reducing the shifting torque and making the shifting easier.

[0033] A pin shaft 3 is provided at the upper end of the shift fork 2, and a V-shaped penetration hole is provided on the cam 5. The pin shaft 3 is penetrated through the penetration hole, and a clearance margin is provided between the pin shaft 3 and the penetration hole. The shift fork drives the cam 5 to rotate through the pin shaft 3.

[0034] like Figure 3 As shown, the elastic return mechanism includes a spring support 8 and a fixed support 10 which are arranged opposite to each other and connected by a guide 14. A spring 9 is arranged between the spring support 8 and the fixed support 10. The spring 9 is mounted on the guide 14. The outer end surface of the spring support 8 is configured with a cam, so that the spring support can achieve reciprocating motion relative to the fixed support under the action of the double boss cam mechanism. Among them, at least one group of springs and guides are provided in the elastic return mechanism, and each group of springs includes at least two springs and guides. When there are multiple groups, each group of springs and guides are arranged from top to bottom in order to enhance the operating feel and sound. This embodiment is described by taking a group of springs and guides as an example. As shown in the figure, a plurality of spring slots are respectively provided on the inner side of the spring support 8 and the fixed support 10, and the two ends of the spring are clamped in the corresponding spring slots. Among them, the guide 14 can be a guide bolt, and the spring support 8 can slide back and forth relative to the guide bolt.

[0035] Among them, the number of elastic return mechanisms is one, that is, it is fixedly mounted on the support flange 11 of the support seat through a fixing frame. The rotation of the shift fork drives the groove wheel 1 to rotate, and the groove wheel 1 drives the main shaft 13 to rotate to achieve the switch shift. At the same time, the rotation of the shift fork drives the cam of the double boss cam mechanism to rotate one circle through the pin shaft 3. The double boss cam mechanism interacts with the elastic return mechanism once to produce the shift sound and positioning feel.

[0036] The specific working process is as follows: Figures 4-1 to 4-3 As shown in the figure, when the tap switch needs to be switched to other gears, the input shaft 4 drives the shift fork to rotate, and the pin shaft 3 rigidly fixed on the shift fork drives the double boss cam mechanism cam 5 to rotate to Figure 4-1 When the position is reached, the spring support 8 of the elastic return mechanism is compressed to Figure 4-2 When the spring 9 is in the 9th position, the elastic support is compressed to the maximum state. At this time, the spring 9 has the maximum pressure. When the front roller 7 passes the center of the elastic support, the spring pressure is released instantly, forcing the two rollers 7 of the cam 5 to contact the elastic support. When the spring force is applied, a sound is generated when the contact is instantaneous, and the switch changes to the next gear position. Figure 4-3 As shown, at this time, the elastic force is still maintained between the cam mechanism and the elastic return mechanism, so that the switch has a positioning feel.

[0037] The present invention can be applied to tap switches with wedge-shaped, top-to-top and clip-type contact structures, so that the tap switch has a sound and a positioning feel when it is shifted into place, thereby intuitively confirming that the tap switch is accurately installed and shifted into place, thereby improving the contact performance of the tap switch.

[0038] Embodiment 2:

[0039] like Figure 5 and Figure 6As shown, the structure of the second embodiment is basically the same as that of the first embodiment, except that: the input shaft 4 is not coaxially arranged with the fork shaft, the upper part of the input shaft 4 is equipped with a joystick and an operating mechanism (the joystick and the operating mechanism are omitted in the figure), and the input shaft 4 drives the fork to rotate through the gear transmission mechanism, that is, the input shaft 4 is connected to the driving gear 15, and the driven gear 16 is connected to the fork shaft, and the driving gear 15 rotates to drive the driven gear 16 to rotate. The driven gear 16 is fixedly connected to the fork 2 by bolts or screws, and a pin 3 is provided on the driven gear 16 to match the V-shaped through-hole on the cam 5. The driven gear 16 moves synchronously with the fork 2, and the driven gear 16 drives the cam 5 of the double boss cam mechanism, and its working process is the same as that of the first embodiment.

[0040] Embodiment three:

[0041] like Figure 7 , Figure 8 As shown, the structure of the third embodiment is basically the same as that of the first embodiment or the second embodiment, and the difference lies in: the installation position of the elastic return mechanism. In this embodiment, the elastic return mechanism is installed on the fan-shaped groove wheel plate of each gear position on the groove wheel, that is, the rotation of the shift fork drives the groove wheel 1 to rotate, and the groove wheel 1 drives the main shaft 13 to rotate to realize the switch gear shifting. At the same time, the rotation of the shift fork drives the double-boss cam mechanism cam 5 to rotate one circle, and the double-boss cam mechanism interacts with the elastic return mechanism installed on the fan-shaped groove wheel plate to produce the gear shifting sound and positioning feel.

Claims

1. A transformer tap changer shift sound and positioning feel device, characterized by: It includes a main shaft mounted on a support seat, the main shaft is connected to a moving contact assembly, a groove wheel is connected to one end of the main shaft, the groove wheel is configured with a shift fork mounted on the support seat to form a groove wheel fork mechanism, the shift fork is connected to a double-boss cam mechanism, the double-boss cam mechanism is matched with an elastic return mechanism, so that when shifting, the rotation of the shift fork drives the double-boss cam mechanism and the elastic return mechanism to interact with each other, the double-boss cam mechanism includes a cam connected to the shift fork, the highest point of the cam is a plane or a curved surface, and bosses are symmetrically arranged on both sides of the plane or the curved surface on the cam, and the distance between the outermost periphery of the boss and the rotation center of the cam is greater than the distance between the plane or the curved surface and the rotation center of the cam.

2. The transformer tap changer shift sound and positioning feel device according to claim 1, characterized in that: The cam is rectangular, and two adjacent sides of its outer circumference are transitionally connected by a transition arc surface, and the plane or curved surface is configured with the spring support of the elastic return mechanism.

3. The transformer tap changer shift sound and positioning feel device according to claim 1, characterized in that: The boss is a boss with an outer side wall in the shape of an arc.

4. The transformer tap changer shift-in-place sound and positioning feel device according to claim 1, characterized in that: A roller is correspondingly arranged at each boss to form a double-roller cam mechanism.

5. The transformer tap changer shift-in-place sound and positioning feel device according to claim 1, characterized in that: The cam is sleeved on the fork shaft, a through hole is provided on the cam, a pin is arranged in the through hole, a clearance margin is provided between the pin and the through hole, and the fork drives the cam to rotate through the pin.

6. The transformer tap changer shift-in-place sound and positioning feel device according to claim 1, characterized in that: The elastic return mechanism is one or more. When there is one, it is installed on the support seat and corresponds to the double boss cam mechanism. When there are multiple, they are correspondingly installed on each fan-shaped groove wheel plate of the groove wheel and configured with the double boss cam mechanism.

7. The transformer tap changer shift-in-place sound and positioning feel device according to claim 6, characterized in that: The elastic return mechanism includes a spring support and a fixed support which are arranged opposite to each other and connected by a guide member, a spring is arranged between the spring support and the fixed support, the spring is sleeved on the guide member, and the spring support is configured with a double-boss cam mechanism so that the spring support can realize reciprocating motion relative to the fixed support under the action of the double-boss cam mechanism.

8. The transformer tap changer shift-in-place sound and positioning feel device according to claim 1, characterized in that: The shift fork shaft of the shift fork is connected to the power input shaft.

9. The transformer tap changer shift-in-place sound and positioning feel device according to claim 8, characterized in that: The power input shaft is connected with the shift fork shaft through a gear transmission mechanism.

10. The transformer tap changer shift-in-place sound and positioning feel device according to claim 7, characterized in that: The elastic return mechanism is provided with at least one group of springs and guides, each group of springs includes at least two springs and guides, and when there are multiple groups, each group of springs and guides are arranged in sequence from top to bottom.

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