Eccentric wheel with unhooking prevention and boosting functions and tap switch quick switching device

Abstract

The invention relates to the technical field of transformer tap switch accessories, and discloses an eccentric wheel with a mousing-hook and boosting function and a quick tap switch switching device.The eccentric wheel comprises an eccentric wheel body, and the mousing-hook and a boosting part are arranged on the bottom face of the eccentric wheel body; the front part of the mousing-hook and boosting part is a mousing-hook convex part which extends along the radial direction of the eccentric wheel body, the middle part of the mousing-hook and boosting part is a boosting convex part which is symmetrically arranged left and right, and the rear part of the mousing-hook and boosting part is a positioning shaft sleeve which is eccentrically arranged with the eccentric wheel body; the tap switch switching device comprises a fixing frame and a rotating shaft penetrating through the fixing frame, and the shaft section, located above the fixing frame, of the rotating shaft is provided with an eccentric wheel body, an upper sliding plate and a lower sliding plate. The influence factors of small elasticity or large resistance generated by aging of the tension spring can be eliminated, and the success rate of switching action is better guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of transformer tap changer accessories, and more particularly to an eccentric wheel with anti-unhooking and boosting functions and a tap changer quick switching device. Background Art

[0002] The transformer tap changer is a device used to connect and switch the transformer taps. Its function is to be used for tap transformation and connection of coil equipment. It is divided into off-excitation tap changers and on-load tap changers. The power transformer has taps ranging from positive 5% to negative 5%. The tap connection is changed by the tap changer to change the number of turns of the high-voltage coil, thereby adjusting the output voltage of the transformer. The fast switching mechanism is an important accessory of the transformer tap changer.

[0003] At present, during the use of the transformer tap changer quick switching mechanism, the next switching action can be performed only when the first switching action is in place. However, after long-term use, if the elastic force generated by the aging of the tension spring is small or the resistance is large, the switching action will fail, which will easily lead to burning or explosion of the transformer tap changer. In severe cases, the variable coil equipment will be completely burned out, affecting the safety and reliability of use. In view of this, we propose an eccentric wheel and tap changer quick switching device with anti-unhooking and boosting functions to solve the above problems. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides an eccentric wheel with anti-unhooking and boosting functions and a tap changer fast switching device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides an eccentric wheel with anti-unhooking and boosting functions, including an eccentric wheel body, the bottom surface of the eccentric wheel body is provided with an anti-unhooking and boosting part, the front part of the anti-unhooking and boosting part is an anti-unhooking convex part extending radially along the eccentric wheel body, the middle part of the anti-unhooking and boosting part is a boosting convex part symmetrically arranged on the left and right, and the rear part of the anti-unhooking and boosting part is a positioning sleeve eccentrically arranged with the eccentric wheel body.

[0006] As a preferred technical solution of the present invention, the end edge of the anti-unhooking protrusion is rounded, and the side surface of the boosting protrusion is rounded.

[0007] As a preferred technical solution of the present invention, the anti-unhooking protrusion, the boosting protrusion, and the positioning sleeve are an integrally formed structure.

[0008] To achieve the above and other related purposes, the present invention also provides a tap changer fast switching device, which is used to realize the fast switching operation of the transformer tap changer through the above eccentric wheel, comprising a fixed frame and a rotating shaft penetrating the fixed frame, the shaft section of the rotating shaft located above the fixed frame is provided with an eccentric wheel body, an upper slide plate and a lower slide plate, the shaft section of the rotating shaft located below the fixed frame is provided with a hook assembly, the eccentric wheel body is fixed to the rotating shaft through a positioning sleeve, the eccentric wheel body is movably contacted with the inner side of the upper slide plate, the upper slide plate is slidably provided on a guide shaft a on the fixed frame, and the lower slide plate is slidably provided on a guide shaft b on the fixed frame, A tension spring a is fixedly connected between the upper and lower slides, and two groups of roller components are symmetrically arranged on the lower slide. During the rotation of the eccentric wheel body with the rotating shaft, the eccentric wheel body pushes the upper slide to slide along the guide shaft a to stretch the tension spring a. When the boosting protrusion abuts against the roller component, the tension spring a is assisted to release the lower slide, so that the lower slide slides back to its original position along the guide shaft b. When the anti-unhooking protrusion abuts against the roller component, the lower slide is pushed to slide fully to ensure that the quick switching action is in place. After the quick switching action is completed, the rotating shaft and the eccentric wheel body stop rotating, so that the lower slide is blocked and limited to prevent the hook assembly from unhooking.

[0009] As a preferred technical solution of the present invention, the hook assembly includes a hanging seat and two hooks, the hanging seat is rotatably sleeved on the outside of the rotating shaft, and two hook slots are symmetrically opened on the hanging seat, and the hook slots include a main hook slot and a spare hook slot, the main hook slot is located on the side of the hanging seat, and the spare hook slot is located on the side of the hanging seat close to the main hook slot, the two hooks are symmetrically rotatably installed on the fixed frame through the shaft pin a, a transmission part is arranged between the lower slide plate and the hanging seat, an elastic connecting part is arranged between the two hooks, and a damping part is arranged on the side of the fixed frame close to the hanging seat.

[0010] As a preferred technical solution of the present invention, the roller member includes an axle pin b, a transmission roller and a support member, the support member is fixedly mounted on the lower sliding plate, and the transmission roller is rotatably connected to the support member through the axle pin b.

[0011] As a preferred technical solution of the present invention, the transmission member includes a transmission slide, a slider and an axle pin c. The transmission slide is fixedly installed at the bottom of the lower slide. The slider is fixedly connected to the hanging seat through the axle pin c. The transmission slide is slidably sleeved outside the slider.

[0012] As a preferred technical solution of the present invention, the elastic connecting member includes two rotating seats, a tension spring b and an axle pin d. The rotating seat is rotatably connected to the hook through the axle pin d, and the tension spring b is fixedly connected between the two rotating seats.

[0013] As a preferred technical solution of the present invention, the damping member includes a limit stopper and an assembly sleeve, the limit stopper is fixedly installed at the bottom of the fixing frame, the limit stopper is fixedly connected to the side wall of the assembly sleeve, and the assembly sleeve is rotatably sleeved outside the rotating shaft.

[0014] As a preferred technical solution of the present invention, a plurality of flange parts are integrally formed on the fixing frame, and two positioning holes are symmetrically provided on the flange parts.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention is provided with an eccentric wheel having an anti-unhooking convex portion and a boosting convex portion. If a switching action is required, the rotating shaft is driven to rotate by a motor. During the rotation of the eccentric wheel body with the rotating shaft, the eccentric wheel body pushes the upper slide plate to slide along the guide shaft a to stretch the tension spring a. When the boosting convex portion abuts against the roller part, the boosting tension spring a releases the lower slide plate, so that the lower slide plate slides and resets along the guide shaft. When the anti-unhooking convex portion abuts against the roller part, the lower slide plate is pushed to slide fully to ensure that the rapid switching action is in place. After the rapid switching action is completed, the rotating shaft and the eccentric wheel body stop rotating, so that the lower slide plate is blocked and limited to prevent the hook component from being unhooked. The present invention has good anti-unhooking and boosting functions, can eliminate the influencing factors of the small elastic force or large resistance caused by the aging of the tension spring, better ensure the success rate of the switching action, avoid the transformer tap changer that is easy to burn or explode, and even the change coil equipment is completely burned out, which is beneficial to improving the safety and reliability of use.

[0016] The present invention provides a hook notch formed by a main hook notch and a spare hook notch. If the hook is accidentally separated from the main hook notch, the hook can be immediately inserted into the spare hook notch to ensure normal operation, which is beneficial to ensuring the stability of the switching mechanism device.

[0017] The present invention provides a damping member with a limit stop seat and an assembly sleeve. The limit stop seat is fixedly installed on the bottom of the fixing frame, the limit stop seat is fixedly connected to the side wall of the assembly sleeve, and the assembly sleeve is rotatably sleeved on the outside of the rotating shaft. The limit stop seat can play a good limit blocking effect on the hanging seat during rotation, thereby preventing the hanging seat from easily rotating excessively. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of an eccentric wheel with anti-unhooking and boosting functions in Embodiment 1 of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the tap switch fast switching device in the second embodiment of the present invention from a first perspective; Figure 3 It is a schematic cross-sectional structural diagram of a tap switch fast switching device in Embodiment 2 of the present invention; Figure 4It is a schematic diagram of the three-dimensional structure of the hanging seat in the tap switch fast switching device in the second embodiment of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the tap switch fast switching device in the second embodiment of the present invention from a second viewing angle; Figure 6 It is a schematic diagram of the three-dimensional structure of the lower slide plate and the roller member in the tap switch fast switching device in the second embodiment of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the tap switch fast switching device in the second embodiment of the present invention from a third viewing angle; Figure 8 It is a schematic diagram of the three-dimensional structure of the damping member in the tap changer fast switching device in the second embodiment of the present invention.

[0019] In the figure: 1, fixing frame; 101, shaft pin a; 102, hanging seat; 103, hook notch; 1031, main hook notch; 1032, spare hook notch; 104, positioning hole; 2, lower slide plate; 201, roller member; 2011, shaft pin b; 2012, transmission roller; 2013, support member; 3, upper slide plate; 4, rotating shaft; 401, eccentric wheel body; 402, anti-unhooking And the boosting part; 4021, the positioning sleeve; 4022, the anti-unhooking protrusion; 4023, the boosting protrusion; 5, the hook; 6, the tension spring a; 7, the transmission member; 701, the transmission slide; 702, the slider; 703, the shaft pin c; 8, the elastic connecting member; 801, the rotating seat; 802, the tension spring b; 803, the shaft pin d; 9, the damping member; 901, the limit stop seat; 902, the assembly sleeve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “longitudinal”, “lateral”, “upper”, “lower”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Example

[0022] like Figure 1As shown, the present invention provides an eccentric wheel with anti-unhooking and boosting functions, including an eccentric wheel body 401, the bottom surface of the eccentric wheel body 401 is provided with an anti-unhooking and boosting part 402, the front part of the anti-unhooking and boosting part 402 is an anti-unhooking protrusion 4022 extending radially along the eccentric wheel body 401, the middle part of the anti-unhooking and boosting part 402 is a boosting protrusion 4023 symmetrically arranged on the left and right, and the rear part of the anti-unhooking and boosting part 402 is a positioning sleeve 4021 eccentrically arranged with the eccentric wheel body 401.

[0023] Among them, Figure 4 As shown, the end edge of the anti-unhooking protrusion 4022 is rounded, the side of the boosting protrusion 4023 is rounded, and the anti-unhooking protrusion 4022, the boosting protrusion 4023, and the positioning sleeve 4021 are an integrally formed structure, so that the overall structure of the eccentric wheel has good strength performance. Example

[0024] like Figures 2 to 8 As shown, the present invention also provides a tap switch fast switching device, which is used to realize the fast switching operation of the transformer tap switch through the eccentric wheel in the above-mentioned embodiment 1, including a fixed frame 1 and a rotating shaft 4 penetrating the fixed frame 1, the shaft section of the rotating shaft 4 located above the fixed frame 1 is provided with an eccentric wheel body 401, an upper slide plate 3 and a lower slide plate 2, the shaft section of the rotating shaft 4 located below the fixed frame 1 is provided with a hook assembly, the eccentric wheel body 401 is fixed to the rotating shaft 4 through a positioning sleeve 4021, the eccentric wheel body 401 is movably contacted with the inner side of the upper slide plate 3, the upper slide plate 3 is slidably arranged on the guide shaft a on the fixed frame 1, the lower slide plate 2 is slidably arranged on the guide shaft b on the fixed frame 1, the upper slide plate 3 and the lower slide plate 2 are fixedly connected with a tension spring a6, and the lower slide plate 2 Two groups of roller components 201 are symmetrically arranged on the upper part, and the rotating shaft 4 is externally connected to the driving shaft of the motor. If a switching action is required, the rotating shaft 4 is driven to rotate by the motor. During the rotation of the eccentric wheel body 401 with the rotating shaft 4, the eccentric wheel body 401 pushes the upper slide plate 3 to slide along the guide shaft a to stretch the tension spring a6. When the boosting protrusion 4023 abuts against the roller component 201, the boosting tension spring a6 releases the lower slide plate 2, so that the lower slide plate 2 slides and resets along the guide shaft b. When the anti-unhooking protrusion 4022 abuts against the roller component 201, it pushes the lower slide plate 2 to slide fully to ensure that the rapid switching action is in place. After the rapid switching action is completed, the rotating shaft 4 and the eccentric wheel body 401 stop rotating, so that the lower slide plate 2 is blocked and limited to prevent the hook assembly from unhooking.

[0025] Among them, Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the hook assembly includes a hanger 102 and two hooks 5. The hanger 102 is rotatably sleeved on the outside of the rotating shaft 4. Two hook slots 103 are symmetrically provided on the hanger 102. The two hooks 5 are symmetrically rotatably installed on the fixing frame 1 through the shaft pin a101. A transmission member 7 is provided between the lower slide plate 2 and the hanger 102. An elastic connecting member 8 is provided between the two hooks 5. A damping member 9 is provided on the side of the fixing frame 1 close to the hanger 102. The hook slot 103 includes a main hook slot 1031 and a spare hook slot 1032. The main hook slot 1031 is located on the side of the hanger 102, and the spare hook slot 1032 is located on the side of the hanger 102 close to the main hook slot 1031. If the hook 5 is accidentally detached from the main hook slot 1031, the hook 5 can be immediately inserted into the spare hook slot 1032 to ensure normal operation.

[0026] Among them, Figure 6 As shown, the roller member 201 includes an axle pin b2011, a transmission roller 2012 and a support member 2013. The support member 2013 is fixedly mounted on the lower slide plate 2, and the transmission roller 2012 is rotatably connected to the support member 2013 via the axle pin b2011.

[0027] Among them, Figure 3 As shown, the transmission member 7 includes a transmission slide 701, a slider 702 and an axle pin c703. The transmission slide 701 is fixedly installed at the bottom of the lower slide 2. The slider 702 is fixedly connected to the mounting 102 through the axle pin c703. The transmission slide 701 is slidably sleeved on the outside of the slider 702, so that when the lower slide 2 slides, it can drive the mounting 102 to rotate along the outside of the rotating shaft 4.

[0028] Among them, Figure 5 As shown, the elastic connecting member 8 includes two rotating seats 801 , a tension spring b802 and an axle pin d803 . The rotating seat 801 is rotatably connected to the hook 5 via the axle pin d803 , and the tension spring b802 is fixedly connected between the two rotating seats 801 .

[0029] Among them, Figure 7 and Figure 8 As shown, the damping member 9 includes a limit stop seat 901 and an assembly sleeve 902. The limit stop seat 901 is fixedly installed at the bottom of the fixing frame 1, and the limit stop seat 901 is fixedly connected to the side wall of the assembly sleeve 902. The assembly sleeve 902 is rotatably sleeved on the outside of the rotating shaft 4. The limit stop seat 901 can play a good limit blocking effect on the hanging seat 102 during the rotational activity, thereby preventing the hanging seat 102 from easily rotating excessively.

[0030] Among them, Figure 5 As shown, the fixing frame 1 is integrally formed with a plurality of flanged portions, and two positioning holes 104 are symmetrically provided on the flanged portions, so that the fixing frame 1 can be fastened and mounted on the corresponding portion of the transformer.

[0031] Working principle of the present invention: During use, the shaft 4 is externally connected to the driving shaft of the motor. If a switching action is required, the shaft 4 is driven to rotate by the motor. The eccentric wheel body 401 rotates with the shaft 4, pushing the upper slide plate 3 to slide forward. The initial state is that the end of the front hook 5 is stuck in the front hook slot 103 on the hanger 102. At this time, the lower slide plate 2 is in a locked and fixed state. The upper slide plate 3 drives the tension spring a6 to gradually stretch until the upper slide plate 3 squeezes the front hook 5 to deflect and disengage from the front hook slot 103. When the boosting protrusion 4023 contacts the roller member 201, the boosting tension spring a6 releases the lower slide plate 2, and the lower slide plate 2 is released from the locked and fixed state. The tension spring b802 in the elastic connecting member 8 can make the rear hook 5 have a tendency to get stuck, and the stretched tension spring a6 drives the lower slide plate 2 to slide rapidly. When the lower slide plate 2 slides, the transmission member 7 can drive the hanging seat 102 to rotate along the outside of the rotating shaft 4. When the anti-unhooking protrusion 4022 contacts the roller member 201, the lower slide plate 2 is pushed to slide fully to ensure that the rapid switching action is in place. The rear hook 5 is stuck in the rear hook groove 103 on the hanging seat 102, and the switching action required for the transformer tap switch can be completed this time. After the rapid switching action is completed, the rotating shaft 4 and the eccentric wheel body 401 stop rotating, so that the lower slide plate 2 is blocked and limited to prevent the hook assembly from being unhooked.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An eccentric wheel with anti-unhooking and boosting functions, characterized in that: It comprises an eccentric wheel body (401), the bottom surface of which is provided with an anti-dropping hook and a boosting portion (402); The front portion of the anti-unhooking and boosting portion (402) is an anti-unhooking protrusion (4022) extending radially along the eccentric wheel body (401); The middle part of the anti-disconnection hook and boosting part (402) is a boosting protrusion (4023) arranged symmetrically on the left and right; The rear portion of the anti-disengagement hook and boosting portion (402) is a positioning sleeve (4021) eccentrically arranged with respect to the eccentric wheel body (401).

2. The eccentric wheel with anti-unhooking and boosting functions according to claim 1, characterized in that: The end edge of the anti-hook convex portion (4022) is rounded, and the side surface of the boosting convex portion (4023) is rounded.

3. An eccentric wheel with anti-unhooking and boosting functions according to claim 1 or 2, characterized in that: The anti-unhooking protrusion (4022), the boosting protrusion (4023), and the positioning sleeve (4021) are an integrally formed structure.

4. A tap changer fast switching device, used to realize the fast switching operation of the transformer tap changer through the eccentric wheel according to any one of claims 1 to 3, characterized in that: It comprises a fixing frame (1) and a rotating shaft (4) passing through the fixing frame (1); The shaft section of the rotating shaft (4) located above the fixing frame (1) is provided with an eccentric wheel body (401), an upper slide plate (3) and a lower slide plate (2), and the shaft section of the rotating shaft (4) located below the fixing frame (1) is provided with a hook assembly; The eccentric wheel body (401) is fixed to the rotating shaft (4) via a positioning sleeve (4021), and the eccentric wheel body (401) is movably in contact with the inner side of the upper slide plate (3); The upper slide plate (3) is slidably arranged on a guide shaft a on the fixing frame (1), the lower slide plate (2) is slidably arranged on a guide shaft b on the fixing frame (1), a tension spring a (6) is fixedly connected between the upper slide plate (3) and the lower slide plate (2), and two groups of roller members (201) are symmetrically arranged on the lower slide plate (2); When the eccentric wheel body (401) rotates along with the rotating shaft (4), the eccentric wheel body (401) pushes the upper slide plate (3) to slide along the guide shaft a to stretch the tension spring a (6); When the boosting protrusion (4023) contacts the roller member (201), the tension spring a (6) is assisted to release the lower slide plate (2), so that the lower slide plate (2) slides and returns to its original position along the guide shaft b; When the anti-unhooking protrusion (4022) contacts the roller member (201), the lower slide plate (2) is pushed to slide fully to ensure that the rapid switching action is in place; After the rapid switching action is completed, the rotating shaft (4) and the eccentric wheel body (401) stop rotating, so that the lower slide plate (2) is blocked and limited to prevent the hook assembly from being unhooked.

5. A tap changer fast switching device according to claim 4, characterized in that: The hook assembly comprises a hanger (102) and two hooks (5); the hanger (102) is rotatably sleeved outside the rotating shaft (4); and two hook notches (103) are symmetrically provided on the hanger (102); The hook notch (103) comprises a main hook notch (1031) and a spare hook notch (1032), wherein the main hook notch (1031) is located on the side of the hanging seat (102), and the spare hook notch (1032) is located on a side of the hanging seat (102) close to the main hook notch (1031); The two hooks (5) are symmetrically rotatably mounted on the fixing frame (1) via an axle pin a (101); a transmission member (7) is provided between the lower slide plate (2) and the hanging seat (102); an elastic connecting member (8) is provided between the two hooks (5); and a damping member (9) is provided on one side of the fixing frame (1) close to the hanging seat (102).

6. A tap changer fast switching device according to claim 5, characterized in that: The roller member (201) comprises an axle pin b (2011), a transmission roller (2012) and a support member (2013); the support member (2013) is fixedly mounted on the lower slide plate (2); and the transmission roller (2012) is rotatably connected to the support member (2013) via the axle pin b (2011).

7. A tap changer fast switching device according to claim 6, characterized in that: The transmission member (7) comprises a transmission slide (701), a slider (702) and an axle pin c (703); the transmission slide (701) is fixedly mounted on the bottom of the lower slide plate (2); the slider (702) is fixedly connected to the hanging seat (102) via the axle pin c (703); and the transmission slide (701) is slidably sleeved outside the slider (702).

8. A tap changer fast switching device according to claim 7, characterized in that: The elastic connecting member (8) comprises two rotating seats (801), a tension spring b (802) and an axle pin d (803); the rotating seat (801) is rotatably connected to the hook (5) via the axle pin d (803); and the tension spring b (802) is fixedly connected between the two rotating seats (801).

9. A tap changer fast switching device according to claim 8, characterized in that: The damping member (9) comprises a limit stop seat (901) and an assembly sleeve (902); the limit stop seat (901) is fixedly mounted on the bottom of the fixing frame (1); the limit stop seat (901) is fixedly connected to the side wall of the assembly sleeve (902); and the assembly sleeve (902) is rotatably sleeved outside the rotating shaft (4).

10. A tap changer fast switching device according to claim 4, characterized in that: The fixing frame (1) is integrally formed with a plurality of flanged portions, and the flanged portions are symmetrically provided with two positioning holes (104).

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