Tap selector for load tap changer

Abstract

The tap selector of the load-time tap changer of the embodiment has a Geneva driver and a Maltese intermittent gear. The Geneva driver is rotatable. The Maltese intermittent gear rotates in conjunction with the rotation of the Geneva driver. The Maltese intermittent gear has a Maltese intermittent stopper and a gear base. The Maltese intermittent stopper is provided at a part of the rotation direction of the Maltese intermittent gear. The gear base has a stopper mounting recess into which the Maltese intermittent stopper is detachably mounted. For the stopper mounting recess of one kind of the gear base, the Maltese intermittent stoppers of mutually different kinds can be replaced.

Description

Technical Field

[0001] Embodiments of the present invention relate to a tap selector for a tap switcher under load.

[0002] This invention claims priority based on Japanese Patent Application No. 2020-176675, filed on October 21, 2020, the contents of which are incorporated herein by reference. Background Technology

[0003] A load-time tap changer is a device for switching taps while the transformer is running (under load). Typically, a load-time tap changer includes a tap selector and a switching device. The tap selector selects the tap operating in the transformer tap winding. The switching device switches the circuit to the selected tap. The tap selector has a movable contact that can move toward a fixed contact. When selecting an operating tap, the movable contact connects to the fixed contact. The tap selector has a Martens intermittent gear that rotates in conjunction with the rotation of a Geneva actuator. The movable contact repeatedly contacts and separates from the fixed contact by moving in conjunction with the rotation of the Martens intermittent gear. The number of taps (contacts) in the tap selector varies depending on factors such as the voltage adjustment range. To accommodate varying tap numbers, different types of Geneva actuators and corresponding Martens intermittent gears are used separately. Even when dealing with varying tap numbers, it is necessary to minimize the increase in the number of parts.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent No. 4282148 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] The problem to be solved by the present invention is to provide a tap selector for a tap switcher that can suppress the increase in the number of parts even when dealing with a variable number of taps.

[0009] Methods for solving problems

[0010] The tap selector of the load-bearing tap switch in this embodiment has a Geneva drive and a Martens intermittent gear. The Geneva drive is rotatable. The Martens intermittent gear rotates in conjunction with the rotation of the Geneva drive. The Martens intermittent gear includes a Martens intermittent stop and a gear base. The Martens intermittent stop is located in a portion of the rotation direction of the Martens intermittent gear. The gear base has a stop mounting recess for detachably mounting the Martens intermittent stop. For a given type of gear base, different types of Martens intermittent stops can be replaced. Attached Figure Description

[0011] Figure 1 This is a perspective view of the load-time tap switcher of the first embodiment.

[0012] Figure 2 This is a perspective view of the 10-contact tap selector of the first embodiment.

[0013] Figure 3 It is a perspective view of the periphery of the Geneva drive including the first embodiment.

[0014] Figure 4 Other perspective views include the periphery of the Geneva drive according to the first embodiment.

[0015] Figure 5 It includes Figure 4 A diagram of the VV cross-section.

[0016] Figure 6 It includes Figure 4 A diagram of section VI-VI.

[0017] Figure 7 This is an exploded perspective view of the peripheral parts of the Geneva drive including the first embodiment.

[0018] Figure 8 This is another exploded perspective view of the peripheral parts of the Geneva drive including the first embodiment.

[0019] Figure 9 This is an exploded perspective view of the 10-contact Martens intermittent gear of the first embodiment.

[0020] Figure 10 This is a top view of the 10-contact Martens intermittent gear of the first embodiment.

[0021] Figure 11 This is a side view of the 10-contact Martens intermittent gear of the first embodiment.

[0022] Figure 12 It is a perspective view including the periphery of the main fixing unit of the first embodiment.

[0023] Figure 13 This is an explanatory diagram of the configuration of the fixed contacts for the 10 contacts in the first embodiment.

[0024] Figure 14 This is an explanatory diagram of the installation method of the fixed contact for the 10 contacts in the first embodiment.

[0025] Figure 15 This is an illustration of the typical tap switching operation in the first embodiment.

[0026] Figure 16 It continues Figure 15 A diagram illustrating the typical tap switching action.

[0027] Figure 17 It continues Figure 16 A diagram illustrating the typical tap switching action.

[0028] Figure 18 This is an explanatory diagram of the operation of switching the 3x tap in the first embodiment.

[0029] Figure 19 It continues Figure 18 A diagram illustrating the action of switching between 3x taps.

[0030] Figure 20 It continues Figure 19 A diagram illustrating the action of switching between 3x taps.

[0031] Figure 21 It continues Figure 20 A diagram illustrating the action of switching between 3x taps.

[0032] Figure 22 It continues Figure 21 A diagram illustrating the action of switching between 3x taps.

[0033] Figure 23 It continues Figure 22 The next typical tap switching action is illustrated in the diagram.

[0034] Figure 24 This is a diagram illustrating the function of switching the slider in a comparative example.

[0035] Figure 25 This is a diagram illustrating the function of the switching slider in the first embodiment.

[0036] Figure 26 This is a perspective view of the 12-contact tap selector of the first embodiment.

[0037] Figure 27 This is an exploded perspective view of the 12-contact Martens intermittent gear of the first embodiment.

[0038] Figure 28 This is a top view of the 12-contact Martens intermittent gear of the first embodiment.

[0039] Figure 29 This is a side view of the 12-contact Martens intermittent gear of the first embodiment.

[0040] Figure 30 This is an explanatory diagram of the configuration of the 12-contact Martens intermittent stop in the first embodiment.

[0041] Figure 31This is an explanatory diagram of the configuration of the fixed contacts for the 12 contacts in the first embodiment.

[0042] Figure 32 This is an explanatory diagram of the installation method of the fixed contact for the 12 contacts in the first embodiment.

[0043] Figure 33 This is a perspective view of the 12-contact tap selector of the second embodiment. Detailed Implementation

[0044] Hereinafter, the tap selector of the load-time tap switcher of the embodiment will be described with reference to the accompanying drawings.

[0045] Figure 1 This is a perspective view of the load tap switcher 1 according to the first embodiment.

[0046] The load tap changer 1 is a device that adjusts voltage by changing the turns ratio (transformation ratio) of the transformer during operation. The load tap changer 1 includes a tap selector 2, a drive mechanism 3, a reduction mechanism 4, a switching switch 5, and an oil tank 6.

[0047] Tap selector 2 selects the taps operating in the transformer tap winding.

[0048] The drive mechanism 3 drives the tap selector 2 by the driving force transmitted from the electric operating device (not shown) via the drive shaft 7.

[0049] The speed reduction mechanism 4 reduces the rotational speed of the rotational motion transmitted from the electric operating device (not shown) to the drive shaft 7.

[0050] The switching device 5 switches the circuit to the selected tap. The switching device 5 is located inside the oil tank 6. The switching device 5 is immersed in insulating oil inside the oil tank 6. The switching device 5 has multiple tap terminals (not shown). These multiple tap terminals are connected to the tap selector 2 via wiring 8.

[0051] Generally, tap selectors have two switching methods: single switching and parallel switching. Single switching involves both movable contacts operating simultaneously, switching between the two contacts when one is de-energized and the other is energized. Parallel switching involves both movable contacts operating only when there is no current, alternately switching between odd and even taps. In this implementation, a tap selector using the single switching method will be described.

[0052] The number of taps (contacts) of a tap selector varies depending on the adjustment range of the system voltage. For example, the number of taps is set in the range of 10 to 40. In the following examples, a 10-contact tap selector (hereinafter also referred to as a "10-contact tap selector") and a 12-contact tap selector (hereinafter also referred to as a "12-contact tap selector") are described respectively.

[0053] First, the 10-contact tap selector 101 of the first embodiment will be described in detail.

[0054] Figure 2 This is a perspective view of the 10-contact tap selector 101 of the first embodiment.

[0055] like Figure 2 As shown, the 10-contact tap selector 101 includes an upper plate 10, a base plate 11, and a support 12.

[0056] The upper plate 10 and the lower plate 11 extend horizontally. The upper plate 10 supports the upper part of the tap selector 101 for the 10 contacts. The lower plate 11 supports the lower part (bottom) of the tap selector 101 for the 10 contacts.

[0057] The support column 12 extends vertically. The support column 12 connects the upper plate 10 and the bottom plate 11. Multiple support columns 12 are provided.

[0058] The 10-contact tap selector 101 includes multiple switches 110, 120 (switching mechanisms) for switching contacts. The multiple switches 110, 120 include a main switch 110 and a secondary switch 120 connected to the main switch 110 via a Geneva drive 20. The multiple supports 12 include a main support 13 supporting the main switch 110 and a secondary support 14 supporting the secondary switch 120.

[0059] The 10-contact tap selector 101 includes a slip ring 18 and a post 19 supporting the slip ring 18.

[0060] Viewed axially, the slip ring 18 is formed in a circular shape. Multiple slip rings 18 are provided at intervals in the vertical direction (e.g., six in this embodiment).

[0061] The column 19 extends vertically. The column 19 is cylindrical. On the outer circumferential surface of the column 19, six collector rings 18 are connected at substantially equal intervals in the vertical direction.

[0062] The main switcher 110 includes a main fixed unit 111 and a main movable unit 112 that is movable relative to the main fixed unit 111.

[0063] The main fixing units 111 are provided in the same number as the slip rings 18 (for example, 6 in this embodiment). The main fixing units 111 are provided in a number corresponding to the three phases U, V, and W. For example, in this embodiment, two are provided for each of the U, V, and W phases (upper and lower layers), for a total of 6. The multiple main fixing units 111 are fixed to the main support column 13 at substantially equal intervals in the vertical direction.

[0064] The main movable unit 112 is provided in the same number as the main fixed unit 111 (for example, 6 in this embodiment). The main movable unit 112 opens (disconnects) or closes (connects) the contacts by sliding on the surface of the slip ring 18 and the surface of the main fixed unit 111.

[0065] The secondary switcher 120 includes a secondary fixed unit 121 and a secondary movable unit (not shown) that is movable relative to the secondary fixed unit 121.

[0066] The auxiliary fixing units 121 are provided in a number corresponding to the three phases U, V and W (for example, in this embodiment, one is provided for each phase, for a total of 3). The multiple auxiliary fixing units 121 are fixed to the auxiliary support column 14 at substantially equal intervals in the vertical direction.

[0067] The number of auxiliary movable units (not shown) is the same as that of the auxiliary fixed units 121 (e.g., 3 in this embodiment).

[0068] The structure of the main switch 110 in the 10-contact tap selector 101 will be described in detail below. The secondary switch 120 has the same structure as the main switch 110, so detailed description is omitted.

[0069] The 10-contact tap selector 101 includes a Geneva drive 20, a 10-contact Martens intermittent gear 50 (Martens intermittent gear), a switching slider 80, and a slider guide plate 90. Figure 2 In the middle, it is displayed through the upper plate 10.

[0070] The Geneva drive 20 is positioned between the upper plate 10 and the secondary switch 120. The Geneva drive 20 is connected to the drive mechanism 3 (see reference 3). Figure 1 The Geneva drive 20 is mounted on the drive shaft 21.

[0071] Figure 3 It is a perspective view of the periphery of the Geneva drive 20 including the first embodiment. Figure 4 These are further perspective views of the periphery of the Geneva drive 20, including the first embodiment. Figure 4 In the middle, it is displayed through the upper plate 10. Figure 5 It includes Figure 4A diagram of the VV cross-section. Figure 6 It includes Figure 4 A diagram of section VI-VI.

[0072] like Figure 5 As shown, the Geneva drive 20 includes a first drive body 22 and a second drive body 23 extending horizontally. The first drive body 22 and the second drive body 23 are coaxially arranged. Viewed from the direction along the drive shaft 21, the first drive body 22 is larger than the second drive body 23. The second drive body 23 is attached to the lower surface of the first drive body 22. For example, the first drive body 22 and the second drive body 23 are integrally formed from the same component.

[0073] The drive shaft 21 extends vertically. It is rotatably supported by a pair of first bearings 24 and second bearings 25. The first bearings 24 are mounted on a first flange 26. The first flange 26 is fixed to the upper plate 10 by a plurality of first bolts 28. The second bearings 25 are mounted on a second flange 27. The second flange 27 is fixed to the drive shaft mounting plate 30 by a plurality of second bolts 29. The drive shaft mounting plate 30 is positioned below the upper plate 10. The drive shaft 21 is rotatably supported by the upper plate 10 and the drive shaft mounting plate 30 in a double-support configuration.

[0074] Figure 7 This is an exploded perspective view of the peripheral parts of the Geneva drive 20 including the first embodiment. Figure 8 This is another exploded perspective view of the peripheral parts of the Geneva drive 20 including the first embodiment.

[0075] like Figure 8 As shown, the drive shaft mounting plate 30 is formed in a U-shape with an opening at the top, surrounding the Geneva drive 20. The upper plate 10 has mounting plate fixing portions 15 for fixing the upper parts of a pair of sidewalls of the drive shaft mounting plate 30. The drive shaft mounting plate 30 is fixed to the pair of mounting plate fixing portions 15 of the upper plate 10 by a plurality of mounting plate bolts 31.

[0076] like Figure 7 As shown, the Geneva drive 20 includes a pair of roller support shafts 32. The pair of roller support shafts 32 are disposed on one side of the first drive body 22. The roller support shafts 32 extend in the vertical direction. The roller support shafts 32 support the guide roller 33 so that it is rotatable.

[0077] like Figure 5As shown, the drive shaft 21 of the actuator supports the slider partition 34, slider support roller 35, and spacer tube 36 for rotatability. The slider partition 34, slider support roller 35, and spacer tube 36 are arranged sequentially on the Geneva actuator 20. The spacer tube 36 is restricted from above by the first bearing 24. The slider partition 34, slider support roller 35, and spacer tube 36 are held by the Geneva actuator 20 and the first bearing 24.

[0078] The Geneva drive 20 includes a pair of gear-driven cam followers 40. The pair of gear-driven cam followers 40 are disposed on the lower surface of the first drive body 22. The pair of gear-driven cam followers 40 are horizontally opposed to each other across the drive shaft 21. The gear-driven cam followers 40 are capable of engaging with the designated slots of the 10-point contact Martens intermittent gear 50.

[0079] like Figure 8 As shown, the Geneva drive 20 includes a first drive-side limiting part 41 (first limiting part) and a second drive-side limiting part 42 (second limiting part) for limiting the rotation of the Martens intermittent gear 50 for the 10 contacts. The first drive-side limiting part 41 and the second drive-side limiting part 42 are respectively formed in an arc shape protruding outward from the rotation center of the Geneva drive 20.

[0080] The first driver-side limiting part 41 is provided on a portion of the outer periphery of the first driver body 22. The first driver-side limiting part 41 restricts the rightward (one direction) rotation of the 10 contact point by the Martens intermittent gear 50 before and after the normal tap switching (first switching operation) (see reference). Figure 23 The first driver-side limiting part 41 restricts the rotation of the 10 contact point by the Martens intermittent gear 50 before and after the switching of the 3x tap switch (second switching operation), which is different from the normal tap switching, in the opposite direction to the rotation to the right (one direction) (see reference). Figure 18 ).

[0081] The second driver-side limiting part 42 is provided on a portion of the outer periphery of the second driver body 23. The second driver-side limiting part 42 restricts the leftward rotation of the 10 contact point using the Martens intermittent gear 50 before and after normal tap switching (see reference). Figure 23 The second driver-side limiting part 42 restricts the rightward rotation of the 10 contacts by the Martens intermittent gear 50 before and after the switching of the 3x tap (see reference). Figure 18 ).

[0082] like Figure 2As shown, the 10 contacts rotate in conjunction with the rotation of the Geneva drive 20 via the Martens intermittent gear 50. The 10 contacts are disposed between the upper plate 10 and the main switch 110. The 10 contacts are concentrically arranged with the central axis C of the main switch 110 (the central axis C of the column 19). Hereinafter, the direction along the central axis C of the main switch 110 will be referred to as the "axial direction", the direction orthogonal to the axial direction will be referred to as the "radial direction", and the direction about the central axis C will be referred to as the "circumferential direction". In this embodiment, the axial direction is the direction orthogonal to the horizontal direction (vertical direction). In this embodiment, the circumferential direction of the Martens intermittent gear is consistent with the rotation direction of the Martens intermittent gear.

[0083] The 10-contact intermittent gear 50 is rotatable and supported by a gear support bearing 51. The gear support bearing 51 is mounted on an annular sleeve 52. The sleeve 52 is mounted on the upper plate 10.

[0084] Figure 9 This is an exploded perspective view of the 10-contact Martens intermittent gear 50 of the first embodiment. Figure 10 This is a top view of the 10-contact Martens intermittent gear 50 of the first embodiment. Figure 11 This is a side view of the 10-contact Martens intermittent gear 50 of the first embodiment.

[0085] like Figure 9 As shown, the 10-contact Martens intermittent gear 50 includes a 10-contact Martens intermittent stop 60 (Martens intermittent stop) and a gear base 70. The 10-contact Martens intermittent stop 60 is disposed in a portion of the rotation direction of the 10-contact Martens intermittent gear 50. The gear base 70 has a stop mounting recess 71 for detachably mounting the 10-contact Martens intermittent stop 60. For a given type of gear base 70, different types of Martens intermittent stops 60 and 160 can be replaced. In this embodiment, for a given type of gear base 70, the 10-contact Martens intermittent stop 60 and the 12-contact Martens intermittent stop 160 (see reference 1) can be replaced. Figure 27 Viewed axially, the stop mounting recess 71 has a shape that follows the outline of the Martens intermittent stop 60 at the 10 contact points. The stop mounting recess 71 is formed in... Figure 9 The range shown is 120 degrees. (Example) Figure 11 As shown, the 10 contacts are fixed to the gear base 70 by the Martens intermittent stop 60 and the stop mounting bolt 53.

[0086] like Figure 10 As shown, the 10-contact Martens intermittent gear 50 has multiple slots 72, 61, 55 and multiple limiting portions 75, 65, 66.

[0087] Multiple slots 72, 61, and 55 are spaced apart along the outer periphery of the 10 contacts using the Martens intermittent gear 50. Each slot 72, 61, and 55 extends radially. Each slot 72, 61, and 55 is recessed radially inward from the outer periphery of the Martens intermittent gear 50. The multiple slots 72, 61, and 55 include a base-side slot 72, a stop-side slot 61, and a combined slot 55. A total of 10 slots 72, 61, and 55 are arranged.

[0088] Seven base side grooves 72 are arranged along the outer periphery of the gear base 70 at substantially equal intervals. The seven base side grooves 72 are arranged at 30-degree intervals. Here, the interval of the base side grooves 72 refers to the interval of the angle (central angle) formed by the center lines of two adjacent base side grooves 72 in the circumferential direction when viewed from the axial direction.

[0089] One stopper side groove 61 is disposed on the outer periphery of the 10-contact Martens intermittent stopper 60. The stopper side groove 61 is located at the center of the outer periphery of the 10-contact Martens intermittent stopper 60. Figure 10 The center of the 90-degree range shown. The stop side groove 61 is opposite to the central groove 72 of the seven base side grooves 72 in the circumferential direction, separated by the central axis C. The stop side groove 61 serves as a follower for the 3x drive cam 85 (see reference). Figure 3 The 3x drive groove 61, which enters (engages) the block, plays its role. Hereinafter, the stop side groove 61 will also be referred to as the 3x drive groove 61.

[0090] The combined groove 55 is a groove formed by the combination of the stop-side half-groove 62 and the base-side half-groove 73. The stop-side half-groove 62 is located at both ends of the circumferential direction of the 10-contact Martens intermittent stop block 60. The base-side half-groove 73 is located at both ends of the circumferential direction of the stop-side mounting recess 71 of the gear base 70. Two combined grooves 55 are provided. Figure 10 The central part of the 30-degree range shown. The combined groove 55 is arranged at 30-degree intervals relative to the outermost groove 72 in the circumferential direction among the seven base side grooves 72. Here, the interval between the combined groove 55 and the base side groove 72 refers to the interval of the angle (central angle) formed by the center lines of adjacent base side grooves 72 and combined groove 55 in the circumferential direction when viewed from the axial direction. Nine of the ten grooves 72, 61, and 55 are arranged at 30-degree intervals.

[0091] The fitting groove 55 has an in-groove clearance portion 56 that avoids the engaging portion. Here, the engaging portion refers to the Geneva actuator 20 (see reference). Figure 7 The 10 contacts are engaged with each other by the Martens intermittent gear 50. The groove clearance portion 56 is provided at the innermost radial end of the combined groove 55. The dividing line 57 of the Martens intermittent stop block 60 and the gear base 70 for the 10 contacts is arranged in the groove clearance portion 56.

[0092] Viewed from the axial direction, the multiple limiting parts 75, 65, and 66 are respectively radially inward and arc-shaped. The multiple limiting parts 75, 65, and 66 include a base-side limiting part 75, a first stop-side limiting part 65, and a second stop-side limiting part 66.

[0093] The base-side limiting portion 75 has an arc-shaped curved surface extending radially inward when viewed from the axial direction. Multiple base-side limiting portions 75 are arranged along the outer periphery of the gear base 70 at substantially equal intervals (e.g., eight in this embodiment). The base-side limiting portions 75 and the base-side grooves 72 are arranged alternately in the circumferential direction.

[0094] The first stop-side limiting portion 65 has an arc-shaped curved surface extending radially inward when viewed axially. Multiple first stop-side limiting portions 65 are arranged at intervals (e.g., two in this embodiment) along the outer periphery of the 10-contact Martens intermittent stop 60. The first stop-side limiting portions 65 are arranged circumferentially between the stop-side groove 61 and the combined groove 55. The first stop-side limiting portions 65 are located at the upper part of the 10-contact Martens intermittent stop 60. The first stop-side limiting portions 65 are arranged vertically relative to the first driver-side limiting portion 41 (see reference). Figure 8 The same height. The circumferential length of the first stop side limiting part 65 is approximately half the circumferential length of the base side limiting part 75.

[0095] The second stop-side limiting portion 66 has an arc-shaped curved surface extending radially inward when viewed axially. Multiple second stop-side limiting portions 66 are arranged at intervals (e.g., two in this embodiment) along the outer periphery of the 10-contact Martens intermittent stop 60. The second stop-side limiting portions 66 are circumferentially positioned between the stop-side groove 61 and the mating groove 55. The second stop-side limiting portions 66 are circumferentially positioned closer to the mating groove 55 than the first stop-side limiting portion 66. The second stop-side limiting portion 66 is located at the lower part of the 10-contact Martens intermittent stop 60. The second stop-side limiting portion 66 is positioned radially outward than the first stop-side limiting portion 65. The second stop-side limiting portion 66 is positioned below the first stop-side limiting portion 65 (see reference). Figure 9 The second stop-side limiting portion 66 is disposed vertically with the second driver-side limiting portion 42 (see reference). Figure 8 The same height. The circumferential length of the second stop side restriction part 66 is approximately half the circumferential length of the base side restriction part 75.

[0096] like Figure 3As shown, the switching slider 80 is supported by the Geneva actuator 20 and is slidable. The switching slider 80 is retractable relative to the 10-contact Martens intermittent gear 50. The switching slider 80 moves toward the 10-contact Martens intermittent gear 50 in conjunction with the rotation of the Geneva actuator 20, thereby engaging with the 10-contact Martens intermittent stop 60 and the gear base 70 only the 10-contact Martens intermittent stop 60.

[0097] The switching slider 80 is restricted from below by the slider partition 34. (Example) Figure 4 As shown, the switching slider 80 is restricted from above by the slider guide plate 90. The slider guide plate 90 is mounted on the lower surface of the upper plate 10. The slider guide plate 90 has a guide plate groove 91 that is heart-shaped when viewed from above.

[0098] like Figure 3 As shown, the switching slider 80 includes a slider body 81 extending horizontally. The slider body 81 has a pair of slider guide grooves 82 and a slider support groove 83. The pair of slider guide grooves 82 extend parallel to each other along the long side of the slider body 81. A guide roller 33 (see reference) is disposed in each slider guide groove 82. Figure 6 ).

[0099] The slider support groove 83 extends parallel to the slider guide groove 82. A portion of the slider support groove 83 is disposed between a pair of slider guide grooves 82. A slider support roller 35 is disposed in the slider support groove 83. The switching slider 80 can slide along the long side of the slider support groove 83 by the rotational sliding of the guide roller 33 along each slider guide groove 82 and the rotational sliding of the slider support roller 35 along the slider support groove 83.

[0100] The switching slider 80 has a 3x drive cam follower 85 that can engage with the 3x drive groove 61 (stop side groove 61) of the 10-contact Martens intermittent gear 50. The 3x drive cam follower 85 is provided at the front end of the slider body 81 (the portion of the slider body 81 on the side of the 10-contact Martens intermittent gear 50 in the long side direction). The 3x drive cam follower 85 is disposed on the lower surface of the front end of the slider body 81.

[0101] The switching slider 80 includes a control roller shaft 86 extending in the vertical direction. The control roller shaft 86 is located on the slider body 81 between a pair of slider guide grooves 82. The control roller shaft 86 supports a slider control roller 87 for rotatability. The slider control roller 87 is positioned above the slider body 81. Figure 4 As shown, the slider control roller 87 is disposed in the guide plate groove 91. The slider control roller 87 slides and rotates along the guide plate groove 91 by rotating the Geneva drive 20.

[0102] The switching slider 80 slides horizontally on the Geneva drive 20 by rotating the control roller 87 along the guide plate groove 91. The switching slider 80 changes the amount of protrusion of the Martens intermittent gear 50 towards the 10 contact point according to the rotation angle of the Geneva drive 20. The guide plate groove 91 is shaped such that the 3x drive cam follower 85 enters (engages) the 3x drive groove 61 at a specified rotation phase of the Geneva drive 20.

[0103] like Figure 2 As shown, the main fixing unit 111 has an annular shape that is concentric with the central axis C of the main switch 110 (the central axis C of the column 19).

[0104] The main fixing unit 111 includes a fixing plate 130, a fixing contact 135, and a contact connecting component 136.

[0105] Figure 12 It is a perspective view including the periphery of the main fixing unit 111 of the first embodiment. Figure 13 This is an explanatory diagram of the configuration of the fixed contact 135 for the 10 contacts in the first embodiment. Figure 14 This is an explanatory diagram of the installation method of the fixed contact 135 for the 10 contacts in the first embodiment.

[0106] like Figure 14 As shown, viewed axially, the fixing plate 130 is formed in an annular shape. For example, the fixing plate 130 is formed of an insulator such as an insulating resin. The fixing plate 130 has a contact mounting recess 131 for detachably mounting a fixing contact 135. The contact mounting recess 131 is recessed inward from the outer surface of the fixing plate 130 so that the fixing contact 135 can be inserted from the outside.

[0107] Multiple contact mounting recesses 131 are arranged at substantially equal intervals in the circumferential direction of the fixing plate 130. In this embodiment, six contact mounting recesses 131 are arranged at 60-degree intervals. Here, the interval of the contact mounting recesses 131 refers to the interval of the angle (central angle) formed between the center lines of two adjacent contact mounting recesses 131 in the circumferential direction when viewed from the axial direction.

[0108] Contact connecting member 136 connects two of the six fixed contacts 135. For example, contact connecting member 136 is formed of the same material as the fixed contacts 135. The mounting plate 130 has a connecting member mounting portion 132 for detachably mounting the contact connecting member 136. The connecting member mounting portion 132 is provided between two adjacent circumferentially adjacent contacts in the six contact mounting recesses 131 of the mounting plate 130.

[0109] The fixing plate 130 has protrusions 133 extending radially outward from the outer periphery of the fixing plate 130. A plurality of protrusions 133 are provided at intervals along the outer periphery of the fixing plate 130 (for example, four in this embodiment). The four protrusions 133 are arranged at substantially the same intervals in the circumferential direction.

[0110] like Figure 2 As shown, the main support column 13 has insertion holes 16 for inserting protrusions 133 of the fixing plate 130. The insertion holes 16 are open in such a way that the protrusions 133 can be inserted. Multiple insertion holes 16 are arranged at substantially equal intervals in the vertical direction (e.g., six in this embodiment). The main fixing unit 111 is mounted to the main support column 13 by inserting the protrusions 133 of the fixing plate 130 into the insertion holes 16 of the main support column 13.

[0111] The main movable unit 112 can move in the circumference of the main fixed unit 111 ( Figure 12 The main movable unit 112 is provided with a pair (see arrow G) so as to clamp the main fixed unit 111 from both sides of the axial direction. Figure 13 ).like Figure 12 As shown, the main movable unit 112 includes a movable plate 140, an inner contact 141, and an outer contact 142 (movable contact). For example, the movable plate 140, the inner contact 141, and the outer contact 142 are integrally formed from the same component (e.g., a metal such as copper).

[0112] The movable plate 140 extends radially across the slip ring 18 and the fixed plate 130. An inner contact 141 is located radially inner to the movable plate 140. The inner contact 141 contacts the axial outer surface of the slip ring 18. An outer contact 142 is positioned radially outer to the movable plate 140 than the inner contact 141. The outer contact 142 is located radially outer to the movable plate 140. The outer contact 142 can connect to the fixed contact 135. Figure 12 In the example, the outer contact 142 is in contact with the axial outer surface of the contact connection component 136 that will connect two adjacent fixed contacts 135 in the circumferential direction.

[0113] like Figure 12 As shown, the main switch 110 includes a mechanism for holding the main movable unit 112 in an axial position relative to the main fixed unit 111. Figure 12 The retaining member 145 moves in the direction of arrow H (see arrow H in the image). The retaining member 145 extends in the vertical direction. The upper end of the retaining member 145 is fixed to the Martens intermittent gear 50 for the 10 contacts (see reference). Figure 13 The lower surface of the retaining member 145 rotates integrally with the 10 contacts via the Martens intermittent gear 50. The main movable unit 112 rotates integrally with the retaining member 145 and the 10 contacts via the Martens intermittent gear 50.

[0114] A pair of retaining members 145 are provided to hold the main movable unit 112. The pair of retaining members 145 are disposed on both sides of the main movable unit 112 in the circumferential direction. The main movable unit 112 is able to move axially by being held by the pair of retaining members 145.

[0115] The main movable unit 112 uses a Martens intermittent gear 50 via 10 contacts (see reference). Figure 2 The rotation of the main movable unit 112, while keeping the inner contact 141 in contact with the collector ring 18, involves the sequential and repeated contact and separation of the outer contact 142 relative to the fixed contact 135 arranged on the same circumference. The outer contact 142 (movable contact) of the main movable unit 112 is connected to the fixed contact 135 or the contact connecting component 136.

[0116] Because the tap selector in this embodiment uses a single switching method, it causes both movable contacts to operate simultaneously, switching between a state where one movable contact is de-energized and the other is energized. Figure 14 In the example, as the main fixing unit 111, an upper fixing unit UT10 for 10 contacts is shown as an upper layer and a lower fixing unit LT10 for 10 contacts is shown as a pair. Figure 13 In the example, the main movable unit 112 shows an upper movable connection part UJ corresponding to the upper fixed unit UT10 for 10 contacts and a lower movable connection part LJ corresponding to the lower fixed unit LT10 for 10 contacts.

[0117] The upper fixing unit UT10 of the 10-contact system functions as the connection part for the odd-numbered taps. The lower fixing unit LT10 of the 10-contact system functions as the connection part for the even-numbered taps. For example... Figure 14 As shown, the fixed contact 135 of the lower fixing unit LT10 for 10 contacts is positioned at the midpoint of the arrangement interval of the fixed contact 135 of the upper fixing unit UT10 for 10 contacts. In other words, the fixed contact 135 of the lower fixing unit LT10 for 10 contacts is arranged at a 30-degree phase offset relative to the fixed contact 135 of the upper fixing unit UT10 for 10 contacts.

[0118] exist Figure 14 In the example, the upper fixing unit UT10 for 10 contacts has 6 fixed contacts 135. In the upper fixing unit UT10 for 10 contacts, two adjacent fixed contacts 135 in the circumferential direction are connected by a contact connecting member 136. The lower fixing unit LT10 for 10 contacts has 5 fixed contacts 135. In the lower fixing unit LT10 for 10 contacts, no fixed contact 135 is provided in the contact mounting recess 131 between two adjacent fixed contacts 135 in the circumferential direction.

[0119] As a result, five fixed contacts 135 are configured on the upper fixed unit UT10 for 10 contacts, and five are configured on the lower fixed unit LT10 for 10 contacts, for a total of ten. These ten fixed contacts 135 constitute a tap selector 101 for 10 contacts (see reference). Figure 2 ).

[0120] exist Figure 14 In the example, the 10-contact upper fixing unit UT10 has five odd-numbered fixed contacts 135 (first fixed contact P1, third fixed contact P3, fifth fixed contact P5, seventh fixed contact P7, and ninth fixed contact P9) sequentially to the left (counterclockwise). On the other hand, the 10-contact lower fixing unit LT10 has five even-numbered fixed contacts 135 (zero fixed contact P0, second fixed contact P2, fourth fixed contact P4, sixth fixed contact P6, and eighth fixed contact P8) sequentially to the left. For example, by combining the 10-contact tap selector and the sub-switcher, up to nineteen taps can be accommodated.

[0121] The following describes an example of the tap switching operation of the 10-contact tap selector according to the first embodiment. The switching operation of the 10-contact tap selector includes normal tap switching and 3x tap switching. Normal tap switching refers to the operation of switching every 30 degrees. 3x tap switching refers to the operation of switching every 3 times (every 90 degrees) of the switching angle of normal tap switching.

[0122] First, let's explain the typical tap switching.

[0123] Figure 15 This is an illustration of the normal tap switching operation of the 10-contact tap selector 101 of the first embodiment. Figure 16 It continues Figure 15 A diagram illustrating the typical tap switching action. Figure 17 It continues Figure 16 A diagram illustrating the typical tap switching operation. For more information on typical tap switching, please refer to... Figures 15-17 The description proceeds sequentially in the direction of rightward (clockwise) rotation of the drive shaft 21. Figures 15-17 In the middle, it is displayed through the upper plate 10.

[0124] Figure 15 The position indicates the position where the power is always on. Figure 15 The position corresponds to the standby position of normal tap switching. In the standby position of normal tap switching, contact 10 engages with the base-side limiting part 75 of the Martens intermittent gear 50 and the second drive-side limiting part 42 of the Geneva drive 20. Figure 15(The elongated oval surrounding portion). The rotation of the 10 contacts is restricted by the engagement of the base-side limiting portion 75 and the second driver-side limiting portion 42.

[0125] In the standby position with normal tap switching, the gear-driven cam follower 40 of the Geneva driver 20 is located on a straight line passing through the rotation center of the Geneva driver 20. In the standby position with normal tap switching, the upper movable connection UJ is located on the third fixed contact P3 of the upper fixed unit UT10 for 10 contacts. On the other hand, the lower movable connection LJ is located on the fourth fixed contact P4 of the lower fixed unit LT10 for 10 contacts.

[0126] When the drive shaft 21 rotates to the right from the standby position where the tap is normally switched, it becomes Figure 16 The diagram shows the normal tap switching start position. In this position, by rotating the Geneva drive 20 in the direction of arrow V, the gear-driven cam follower 40 enters (engages) the engagement slot 55 of the 10-contact Martens intermittent gear 50. When the gear-driven cam follower 40 engages with the engagement slot 55, the 10-contact Martens intermittent gear 50 begins to rotate. As the rotation of the 10-contact Martens intermittent gear 50 begins, the movable connecting parts UJ and LJ begin to move in the direction of arrow W.

[0127] When the drive shaft 21 rotates to the right from the normal tap switching start position, it becomes Figure 17 The diagram shows the normal tap switching completion position. In this position, by further rotating the Geneva drive 20 in the direction of arrow V, the gear-driven cam follower 40 disengages from the coupling slot 55. When the gear-driven cam follower 40 disengages from the coupling slot 55, the movable connections UJ and LJ rotate 30 degrees and stop. In the normal tap switching completion position, the upper movable connection UJ is located on the fifth fixed contact P5 of the upper fixing unit UT10 for 10 contacts. On the other hand, the lower movable connection LJ is located on the fourth fixed contact P4 of the lower fixing unit LT10 for 10 contacts.

[0128] From the standby position where the tap is normally switched until the switching is complete, the upper movable connection UJ moves between the contacts from the third fixed contact P3 to the fifth fixed contact P5 of the upper fixed unit UT10 for 10 contacts. On the other hand, while the upper movable connection UJ moves from the third fixed contact P3 to the fifth fixed contact P5, the lower movable connection LJ moves on the fourth fixed contact P4 of the lower fixed unit LT10 for 10 contacts.

[0129] Next, the switching of the 3x tap will be explained.

[0130] Figure 18 This is an explanatory diagram of the operation of switching three taps in the 10-contact tap selector 101 of the first embodiment. Figure 19 It continues Figure 18 A diagram illustrating the action of switching between 3x taps. Figure 20 It continues Figure 19 A diagram illustrating the action of switching between 3x taps. Figure 21 It continues Figure 20 A diagram illustrating the action of switching between 3x taps. Figure 22 It continues Figure 21 The diagram illustrates the operation of switching between 3x taps. For more information on switching between 3x taps, please refer to... Figures 18-22 The descriptions will proceed sequentially in the direction of clockwise rotation of the drive shaft 21. Figures 18-22 In the middle, it is displayed through the upper plate 10.

[0131] Figure 18 The position corresponds to the standby position of the 3x tap switching. In the standby position of the 3x tap switching, the first driver-side limiting part 41 of the Geneva drive 20 engages with the first stop-side limiting part 65 of the Martens intermittent gear 50 ( Figure 18 The long oval surrounding portion near the central axis C). The leftward rotation of the 10 contacts using the Martens intermittent gear 50 is restricted by the engagement of the first driver-side limiting portion 41 and the first stop-side limiting portion 65. Furthermore, in the standby position with the 3x tap switching, the second driver-side limiting portion 42 of the Geneva drive 20 engages with the second stop-side limiting portion 66 of the 10 contacts using the Martens intermittent gear 50. Figure 18 (The long oval surrounding part of the drive shaft 21 in the middle). By engaging the second drive-side limiting part 42 with the second stop-side limiting part 66, the rightward rotation of the 10 contact point is restricted by the Martens intermittent gear 50.

[0132] In the standby position of the 3x tap switching, the 3x drive cam follower 85 of the switching slider 80 is located on a straight line passing through the rotation center of the Geneva drive 20. In the standby position of the 3x tap switching, relative to the normal tap switching standby position (refer to...), Figure 15 Geneva drive 20 rotates 180 degrees. Thus, one tap switch (switching from the fourth fixed contact P4 to the fifth fixed contact P5) is completed.

[0133] When the drive shaft 21 rotates to the right from the standby position switched by the 3x tap, it becomes Figure 19The diagram shows the starting position for the 3x tap switching. At this starting position, by rotating the Geneva actuator 20 in the direction of arrow V, the slider control roller 87 of the switching slider 80 moves along the guide plate groove 91 of the slider guide plate 90. By moving the slider control roller 87 along the guide plate groove 91, the switching slider 80 slides on the Geneva actuator 20 in the direction of arrow X (away from the rotation center of the Geneva actuator 20). Furthermore, the 3x drive cam follower 85 moves in the direction of arrow Y. By sliding the switching slider 80 in the direction of arrow X, the 3x drive cam follower 85 is guided to the vicinity of the 3x drive groove 61 of the 10-contact Martens intermittent gear 50. When the 3x drive cam follower 85 engages with the 3x drive groove 61, the 10-contact Martens intermittent gear 50 begins to rotate again. With the rotation of the 10-contact Martens intermittent gear 50, the movable connecting parts UJ and LJ begin to move again in the direction of arrow W.

[0134] Here, the distance between the rotation center of the Geneva drive 20 and the rotation center of the 3x drive cam follower 85 is referred to as the "3x drive center distance," and the distance between the rotation center of the Geneva drive 20 and the rotation center of the gear drive cam follower 40 is referred to as the "gear drive center distance." In this embodiment, the 3x drive center distance is larger than the gear drive center distance; therefore, the 3x drive cam follower 85 engages with the 3x drive slot 61 at an earlier stage. Therefore, at the switching start position of the 3x tap switching, compared to the normal tap switching start position (refer to...),... Figure 16 Compared to the previous model, the movable connectors UL and LJ are driven by growth.

[0135] When the drive shaft 21 rotates to the right from the starting position of the 3x tap switching, it becomes Figure 20 The shown position is the midpoint of the 3x tap switch. The midpoint of the 3x tap switch corresponds to advancing approximately half an angle by further rotating the Geneva drive 20 in the direction of arrow V (from...). Figure 18 The position shown is approximately 90 degrees to the right of the standby position of the 3x tap position. In the intermediate position of the 3x tap switching, by moving the slider control roller 87 along the guide plate groove 91, the 3x drive cam follower 85 moves in the direction of arrow Z (approaching the rotation center of the Geneva drive 20). Furthermore, the 3x drive cam follower 85 moves in the direction of arrow Y. By moving the 3x drive cam follower 85 in the direction of arrow Z, the distance between the 3x drive centers decreases, thus reducing the load torque on the 10-contact Martens intermittent gear 50.

[0136] When the drive shaft 21 rotates to the right from the middle position of the 3x tap switching, it becomes Figure 21The diagram shows the progress position of the 3x tap switching. At this progress position, by rotating the Geneva drive 20 in the direction of arrow V, the 3x drive cam follower 85 reaches a position just before disengaging from the 3x drive slot 61. At this progress position, by moving the slider control roller 87 along the guide plate slot 91, the 3x drive cam follower 85 moves in the direction of arrow X (away from the rotation center of the Geneva drive 20). Furthermore, the 3x drive cam follower 85 moves in the direction of arrow Y. Through the movement of the 3x drive cam follower 85 in the direction of arrow X, the 10-contact point rotates in the direction of arrow W using the Martens intermittent gear 50. At this progress position, through the rotation of the 10-contact point in the direction of arrow W using the Martens intermittent gear 50, the 10-contact point rotates to a predetermined rotation angle (from...). Figure 18 The standby position of the 3x tap position shown is near the left 90 degrees.

[0137] When the drive shaft 21 rotates to the right from the progress position switched by the 3x tap, it becomes Figure 22 The diagram shows the completed position of the 3x tap switching. At this completed position, by further rotating the Geneva drive 20 in the direction of arrow V, the 3x drive cam follower 85 disengages from the 3x drive slot 61. With the 3x drive cam follower 85 disengaging from the 3x drive slot 61, contact 10 completes the specified rotation angle (from...) using the Martens intermittent gear 50. Figure 18 The standby position of the 3x tap position is rotated 90 degrees to the left.

[0138] When the drive shaft 21 rotates to the right from the position where the 3x tap switching is complete, the 3x drive cam follower 85 moves again in the direction of arrow Z (closer to the rotation center of the Geneva drive 20) by moving the slider control roller 87 along the guide plate groove 91. Furthermore, the 3x drive cam follower 85 moves again in the direction of arrow Y.

[0139] Figure 23 It continues Figure 22 The next typical tap switching action is illustrated in the diagram. Figure 23 In the middle, it is displayed through the upper plate 10.

[0140] When the drive shaft 21 rotates to the right from the position where the 3x tap switching is completed, it becomes Figure 23 The next normal tap-switching standby position is shown. In the next normal tap-switching standby position, the first driver-side limiting part 41 of the Geneva drive 20 engages with the first stop-side limiting part 65 of the Martens intermittent gear 50 ( Figure 23The long oval surrounding portion near the central axis C). The rightward rotation of the 10 contacts using the Martens intermittent gear 50 is restricted by the engagement of the first driver-side limiting portion 41 and the first stop-side limiting portion 65. Furthermore, in the standby position for the next normal tap switching, the second driver-side limiting portion 42 of the Geneva drive 20 engages with the second stop-side limiting portion 66 of the 10 contacts using the Martens intermittent gear 50. Figure 23 (The long oval surrounding portion near the drive shaft 21). By engaging the second drive-side limiting portion 42 with the second stop-side limiting portion 66, the leftward rotation of the 10 contact point is restricted by the Martens intermittent gear 50.

[0141] In the standby position of the next normal tap switching, the 3x drive cam follower 85 of the switching slider 80 is located on a straight line through the rotation center of the Geneva drive 20 (with... Figure 18 The standby position shown is opposite to the 3x tap switching standby position. In the next normal tap switching standby position, relative to the 3x tap switching standby position (refer to...). Figure 18 Geneva drive 20 rotates 180 degrees.

[0142] Standby position switched from 3x tap (refer to) Figure 18 Until the next normal tap switching standby position, the lower movable connection LJ moves between contacts from the fourth fixed contact P4 to the sixth fixed contact P6 of the lower fixed unit LT10 for 10 contacts. Meanwhile, during the movement of the lower movable connection LJ from the fourth fixed contact P4 to the sixth fixed contact P6, the upper movable connection UJ moves on the fifth fixed contact P5 (on the contact connecting member 136) of the upper fixed unit UT10 for 10 contacts. Thus, one tap switching (switching from the fifth fixed contact P5 to the sixth fixed contact P6) is completed.

[0143] Next, refer to Figure 24 and Figure 25 Explain the function of switching slider 80.

[0144] Figure 24 This is a diagram illustrating the function of the switching slider 80 in a comparative example. Figure 25 This is a diagram illustrating the operation of the switching slider 80 in the first embodiment. Figure 24 and Figure 25 In the example, the distance between the rotation center of the Geneva drive 20 (drive drive shaft 21) and the rotation center (central shaft C) of the 10 contact Martens intermittent gear 50 (hereinafter also referred to as "distance between rotation centers") is set as L.

[0145] Figure 24This indicates the movement trajectory of the rotation center of the 3x drive cam follower 85 when the switching slider 80 is fixed in the position where the 3x drive cam follower 85 is engaged with the 3x drive slot 61. Figure 24 In this context, the distance K between the rotation center of the drive shaft 21 and the movement trajectory of the 3 times drive cam follower 85 is set to 2 / 3 of the distance L between the rotation centers (K = L × 2 / 3).

[0146] Figure 25 This indicates the movement trajectory of the rotation center of the 3x drive cam follower 85 when the switching slider 80 slides on the Geneva driver 20 according to the rotational phase of the Geneva driver 20 under the action of the slider guide plate 90. Figure 25 The example shown is a setting of the distance (L / 2) from the rotation center of the drive shaft 21 and the distance (L / 2) from the rotation center of the Martens intermittent gear 50 for the 10 contacts.

[0147] like Figure 25 As shown, the movement trajectory of the rotation center of the 3x drive cam follower 85 in the first embodiment is compared with the movement trajectory of the rotation center of the 3x drive cam follower 85 in the comparative example (see reference). Figure 24 Small. According to the first embodiment, compared to the comparative example, the external area of ​​the tap selector when viewed from the axial direction can be reduced.

[0148] exist Figure 24 and Figure 25 In the example case, the load torque of the 10-contact Martens intermittent gear 50 is maximum when the rotation center of the 3-times drive cam follower 85 is located on the straight line Q connecting the rotation center of the drive shaft 21 and the rotation center of the 10-contact Martens intermittent gear 50. The maximum load torque Tmax of the 10-contact Martens intermittent gear 50 is calculated by the following formula (1).

[0149] Tmax=T÷R×M···(1)

[0150] In the above formula (1), T represents the load torque of the 10-contact Martens intermittent gear 50, R represents the distance between the rotation center of the 10-contact Martens intermittent gear 50 and the rotation center of the 3-times drive cam follower 85 when the rotation center of the 3-times drive cam follower 85 is on the straight line Q, and M represents the distance between the rotation center of the Geneva drive 20 and the rotation center of the 3-times drive cam follower 85 when the rotation center of the 3-times drive cam follower 85 is on the straight line Q.

[0151] like Figure 24As shown, in the comparative example, R = L / 3 and M = L × 2 / 3. If we substitute R = L / 3 and M = L × 2 / 3 into equation (1) for calculation, then in the comparative example, Tmax = 2T.

[0152] like Figure 25 As shown, in the first embodiment, R = L / 2 and M = L / 2. If R = L / 2 and M = L / 2 are substituted into equation (1) for calculation, then in the first embodiment, Tmax = T. In the first embodiment, this is half the load torque of the comparative example. According to the first embodiment, the load torque during tap switching can be suppressed.

[0153] Next, using Figures 26-32 The 12-contact tap selector 102 of the first embodiment will be described in detail.

[0154] Figure 26 This is a perspective view of the 12-contact tap selector 102 according to the first embodiment. Figures 26-32 In this document, for structures identical to the 10-contact tap selector 101 described above, the same reference numerals are used, and detailed descriptions are omitted.

[0155] like Figure 26 As shown, the 12-contact tap selector 102 includes a Geneva drive 20, a 12-contact Martens intermittent gear 150, a switching slider 80, and a slider guide plate 90. Figure 26 In the middle, it is displayed through the upper plate 10.

[0156] Figure 27 This is an exploded perspective view of the 12-contact Martens intermittent gear 150 of the first embodiment. Figure 28 This is a top view of the 12-contact Martens intermittent gear 150 of the first embodiment. Figure 29 This is a side view of the 12-contact Martens intermittent gear 150 of the first embodiment.

[0157] like Figure 27 As shown, the 12-contact Martens intermittent gear 150 includes a 12-contact Martens intermittent stop 160 and a gear base 70. The 12-contact Martens intermittent stop 160 is disposed in a portion of the rotation direction of the 12-contact Martens intermittent gear 150. The gear base 70 has a stop mounting recess 71 for detachably mounting the 12-contact Martens intermittent stop 160. Viewed axially, the stop mounting recess 71 has a shape that follows the outer profile of the 12-contact Martens intermittent stop 160. The 12-contact Martens intermittent stop 160 has a shape similar to that of the 10-contact Martens intermittent stop 60 (see reference). Figure 9 The shape of the portion of the recess 71 installed along the stop block is the same. For example... Figure 29As shown, the 12-contact Martens intermittent stop 160 is fixed to the gear base 70 by the stop mounting bolt 53. The 12-contact Martens intermittent gear 150 uses the same gear base 70 as the base as the 10-contact Martens intermittent gear 50.

[0158] like Figure 28 As shown, the 12-contact Martens intermittent gear 150 has multiple slots 72, 161, 55 and multiple limiting portions 75, 165. The multiple slots 72, 161, 55 and the multiple limiting portions 75, 165 are arranged alternately in the circumferential direction.

[0159] Multiple slots 72, 161, and 55 are arranged at substantially equal intervals along the outer periphery of the 12 contacts, separated by the Martens intermittent gear 150. The slots 72, 161, and 55 extend radially. The slots 72, 161, and 55 are recessed radially inward from the outer periphery of the Martens intermittent gear 150. The slots 72, 161, and 55 include a base-side slot 72, a stop-side slot 161, and a combined slot 55. A total of 12 slots 72, 161, and 55 are arranged. The 12 slots 72, 161, and 55 are arranged at 30-degree intervals.

[0160] Seven base side grooves 72 are arranged at substantially equal intervals along the outer periphery of the gear base 70. The seven base side grooves 72 are arranged at 30-degree intervals.

[0161] Three stopper side grooves 161 are arranged at substantially equal intervals along the outer periphery of the 12 contacts, separated by the Martens intermittent stopper 160. The three stopper side grooves 161 are arranged at 30-degree intervals.

[0162] The combined groove 55 is a groove formed by the combination of the stop-side half-groove 162 and the base-side half-groove 73. The stop-side half-groove 162 is located at both ends of the circumferential direction of the 12-contact Martens intermittent stop 160. The base-side half-groove 73 is located at both ends of the circumferential direction of the stop-side mounting recess 71 of the gear base 70. Two combined grooves 55 are provided. Figure 28 The center of the 30-degree range shown. The combined groove 55 is arranged at 30-degree intervals relative to the outermost groove 72 in the circumferential direction among the 7 base side grooves 72 and the outermost groove 161 in the circumferential direction among the 3 stop block side grooves 161.

[0163] Multiple limiting portions 75 and 165 are spaced apart along the outer periphery of the 12-contact Martens intermittent gear 150. Viewed axially, the multiple limiting portions 75 and 165 are respectively radially inwardly square and arc-shaped. The multiple limiting portions include a base-side limiting portion 75 and a stop-side limiting portion 165 for the 12-contact gear.

[0164] When viewed axially, the base-side limiting portion 75 has an arc-shaped curved surface facing radially inward. Multiple base-side limiting portions 75 are arranged at substantially equal intervals along the outer periphery of the gear base 70 (e.g., eight in this embodiment). The base-side limiting portions 75 and the base-side grooves 72 are arranged alternately in the circumferential direction.

[0165] Viewed axially, the 12-contact stop-side limiting portion 165 has an arc-shaped curved surface facing radially inward. Viewed axially, the 12-contact stop-side limiting portion 165 has the same shape as the base-side limiting portion 75. Multiple 12-contact stop-side limiting portions 165 are arranged at substantially equal intervals (e.g., four in this embodiment) along the outer periphery of the 12-contact Martens intermittent stop 160. The 12-contact stop-side limiting portions 165 and the stop-side groove 61 are arranged alternately in the circumferential direction.

[0166] As a result, the 12-contact Martens intermittent gear 150 has 12 equivalent slots 72, 161, and 55 (7 base-side slots 72, 3 stop-side slots 61, and 2 combination slots 55) and 12 equivalent limiting parts 75 and 165 (8 base-side limiting parts 75 and 4 stop-side limiting parts 165 for 12 contacts).

[0167] Figure 30 This is an explanatory diagram of the configuration of the 12-contact Martens intermittent stop 160 in the first embodiment.

[0168] like Figure 30 As shown, the 12-contact Martens intermittent stop 160 is positioned vertically at a height lower than 3 times the height of the drive cam follower 85. The 12-contact Martens intermittent stop 160 is positioned horizontally not intersecting with the first driver-side limiting portion 41 (see reference). Figure 8 The position of interference. Even when the Geneva drive 20 is rotating, the first drive side limiting part 41 will not interfere with the 12-contact MAGA intermittent stop 160. Therefore, the 12-contact tap selector 102 can be combined with the 10-contact tap selector 101 to make the Geneva drive 20 common.

[0169] In the 12-contact tap selector 102, during tap switching, the 12-contact Martens intermittent gear 150 rotates at 30-degree intervals by engaging the gear-driven cam follower 40 with any one of the 12 slots 72, 161, and 55. Conversely, during stopping, the second drive-side limiting part 42 of the Geneva drive 20 (see reference...) Figure 8 It engages with any one of the 12 limiting parts 75, 165, and the rotation of the 12 contacts is limited by the Martens intermittent gear 150.

[0170] Figure 31This is an explanatory diagram of the configuration of the fixed contact 135 for the 12 contacts in the first embodiment. Figure 32 This is an explanatory diagram of the installation method of the fixed contact 135 for the 12 contacts in the first embodiment.

[0171] exist Figure 32 In the example, the main fixing unit 111 of the 12-contact tap selector 102 shows an upper fixing unit UT12 for 12 contacts located on the upper layer and a lower fixing unit LT12 for 12 contacts located on the lower layer. Figure 31 In the example, the main movable unit 112 of the 12-contact tap selector 102 shows an upper movable connection part UJ corresponding to the upper fixed unit UT12 for 12 contacts and a lower movable connection part LJ corresponding to the lower fixed unit LT12 for 12 contacts.

[0172] The upper fixing unit UT12 of the 12-contact system functions as the connection part for the odd-numbered taps. The lower fixing unit LT12 of the 12-contact system functions as the connection part for the even-numbered taps. For example... Figure 32 As shown, the upper fixing unit UT12 for 12 contacts has six fixed contacts 135 arranged at substantially equal intervals in the circumferential direction. The lower fixing unit LT12 for 12 contacts also has six fixed contacts 135 arranged at substantially equal intervals in the circumferential direction. The fixed contacts 135 of the lower fixing unit LT12 are arranged at a 30-degree phase offset relative to the fixed contacts 135 of the upper fixing unit UT12 for 12 contacts.

[0173] Six fixed contacts 135 are configured on the upper fixed unit UT12 for 12 contacts, and six are configured on the lower fixed unit LT12 for 12 contacts, for a total of 12. These 12 fixed contacts 135 constitute a tap selector 102 for 12 contacts (see reference). Figure 26 ).

[0174] exist Figure 32 In the example, the 12-contact system uses the upper fixing unit UT12 to the left (counterclockwise) and has six fixed contacts 135 with odd numbers (first fixed contact P1, third fixed contact P3, fifth fixed contact P5, seventh fixed contact P7, ninth fixed contact P9, eleventh fixed contact P11). On the other hand, the 12-contact system uses the lower fixing unit LT12 to the left and has six fixed contacts 135 with even numbers (zero fixed contact P0, second fixed contact P2, fourth fixed contact P4, sixth fixed contact P6, eighth fixed contact P8, tenth fixed contact P10).

[0175] As described above, the tap selector 101 (102) of the load tap switcher 1 in this embodiment has a Geneva drive 20 and a Martens intermittent gear 50 (150). The Geneva drive 20 is rotatable. The Martens intermittent gear 50 (150) rotates in conjunction with the rotation of the Geneva drive 20. The Martens intermittent gear 50 (150) includes a Martens intermittent stop 60 (160) and a gear base 70. The Martens intermittent stop 60 (160) is provided in a portion of the rotation direction of the Martens intermittent gear 50 (150). The gear base 70 has a stop mounting recess 71 for detachably mounting the Martens intermittent stop 60 (160). For a given type of gear base 70, different types of Martens intermittent stops 60 (160) can be replaced. With the above structure, the following effects are achieved.

[0176] Even when the Martens intermittent stop 60 (160) is replaced relative to the stop mounting recess 71 to accommodate a varying number of taps, the common gear base 70 can still be used. Therefore, even when accommodating a varying number of taps, an increase in the number of parts can be suppressed.

[0177] Tap selector 101 (102) includes a switching slider 80, which is slidably supported on Geneva actuator 20 in a manner that allows it to move forward and backward relative to Martens gear 50 (150). The switching slider 80 advances toward Martens gear 50 (150) in conjunction with the rotation of Geneva actuator 20, engaging only with Martens stop 60 in Martens stop block 60 and gear base 70. This structure achieves the following effects.

[0178] By switching the forward and backward movement of the slider 80 in conjunction with the rotation of the Geneva drive 20, and by engaging the slider 80 with the Martens intermittent stop 60, the Martens intermittent gear 50 can be rotated at a specified rotation angle (a specified multiple of the rotation angle during normal switching) in a single switching action.

[0179] The switching slider 80 changes the amount of protrusion outward from the rotation center of the Geneva driver 20 according to the rotation angle of the Geneva driver 20, achieving the following effect.

[0180] Assuming that the protrusion of the switching slider 80 is constant (always at its maximum protrusion) regardless of the rotation angle of the Geneva actuator 20, a large footprint is required for a full rotation of the switching slider 80. In contrast, according to this embodiment, because the protrusion of the switching slider 80 varies according to the rotation angle of the Geneva actuator 20, the footprint can be reduced. Therefore, the tap selector can be miniaturized.

[0181] By making the protrusion of the switching slider 80 when it is engaged with the Martens intermittent stop 60 smaller than the protrusion of the switching slider 80 when it is not engaged with the Martens intermittent stop 60, the following effect is achieved.

[0182] If the protrusion of the switching slider 80 is constant (always at its maximum protrusion) regardless of the rotation angle of the Geneva drive 20, excessive load will be generated when the switching slider 80 engages with the Martens intermittent stop 60. In contrast, according to this embodiment, because the protrusion of the switching slider 80 when engaged with the Martens intermittent stop 60 is small, excessive load can be suppressed. Therefore, the load increase during the switching operation of the switching slider 80 can be suppressed.

[0183] The Martens intermittent stop 60 (160) has stop-side semi-grooves 62 (162) at both ends in the circumferential direction. The gear base 70 has base-side semi-grooves 73 at both ends in the circumferential direction of the stop mounting recess 71. The Martens intermittent gear 50 (150) has a combined groove 55 formed by the combination of the stop-side semi-grooves 62 (162) and the base-side semi-grooves 73. The combined groove 55 has an in-groove clearance portion 56 to avoid the engaging parts. The dividing line 57 between the Martens intermittent stop 60 (160) and the gear base 70 is located in the in-groove clearance portion 56. The above structure achieves the following effects.

[0184] The dividing line 57 between the Martens intermittent stop 60 (160) and the gear base 70 is disposed in the recessed clearance portion 56. Therefore, during the switching operation, the engaging portion does not contact the dividing line 57, enabling a smooth switching action. Furthermore, because the dividing line 57 does not appear on the outer circumferential surface of the Martens intermittent gear 50 (150), the engagement between the limiting portion on the Geneva drive 20 side and the limiting portion on the Martens intermittent gear 50 (150) side remains good. Thus, the reliability of the switching operation can be improved.

[0185] The Geneva drive 20 includes a first drive-side limiting part 41 and a second drive-side limiting part 42 that restrict the rotation of the Martens intermittent gear 50 before and after the switching operation of the Martens intermittent gear 50. The first drive-side limiting part 41 restricts the rightward rotation of the Martens intermittent gear 50 before and after a normal tap switch. The first drive-side limiting part 41 restricts the leftward rotation of the Martens intermittent gear 50 before and after a 3x tap switch. The second drive-side limiting part 42 restricts the leftward rotation of the Martens intermittent gear 50 before and after a normal tap switch. The second drive-side limiting part 42 restricts the rightward rotation of the Martens intermittent gear 50 before and after a 3x tap switch. This structure achieves the following effects.

[0186] By means of the first driver-side limiting part 41 and the second driver-side limiting part 42, the rotational limitation on the Martens intermittent gear 50 can be shared by mutually opposing rotational limitations before and after each normal tap switching and triple tap switching. Therefore, the reliability of the switching operation can be improved in each of the normal tap switching and triple tap switching.

[0187] The tap selector 101 includes a plurality of fixed contacts 135, a contact connecting member 136 connecting two of the plurality of fixed contacts 135, and an annular fixing plate 130. The fixing plate 130 has contact mounting recesses 131 for detachably mounting the fixed contacts 135 and connecting member mounting portions 132 for detachably mounting the contact connecting members 136. A plurality of contact mounting recesses 131 are spaced apart circumferentially on the fixing plate 130. The connecting member mounting portions 132 are located between two adjacent contact mounting recesses 131 on the circumferential direction of the fixing plate 130. This structure achieves the following effects.

[0188] Even when fixing the contact 135 relative to the contact mounting recess 131 or fixing the contact connecting member 136 relative to the connecting member mounting portion 132 to accommodate varying tap numbers, a universal fixing plate 130 can still be used. Therefore, even when dealing with varying tap numbers, an increase in the number of parts can be suppressed.

[0189] In particular, the gear base 70, Geneva actuator 20, fixed contact 135, and fixing plate 130 are the main components with a high cost ratio among the parts constituting the tap selector. According to this embodiment, a common gear base 70, a common Geneva actuator 20, a common fixed contact 135, and a common fixing plate 130 can be used, which is preferred in terms of reducing component costs.

[0190] For example, as a conventional example, a tap selector is shown that uses different types of Geneva actuators and corresponding Martens intermittent gears to accommodate varying tap numbers. A conventional 10-contact tap selector includes a 10-contact Martens intermittent gear, a 10-contact fixed contact, a 10-contact fixed contact mounting plate, and a 10-contact Geneva actuator. A conventional 12-contact tap selector includes a 12-contact Martens intermittent gear, a 12-contact fixed contact, a 12-contact fixed contact mounting plate, and a 12-contact Geneva actuator. In this conventional example, two different types of parts are used for the four main components constituting the tap selector (Martens intermittent gear, fixed contact, fixed contact mounting plate, and Geneva actuator). In this conventional example, by using two different types of parts, the supply quantity of the target parts is divided into two parts, making it difficult to reduce costs. For example, when the demand ratio of parts is extremely unbalanced between 10-contact and 12-contact applications, the high unit price of very small batches of parts can potentially lead to an increase in the overall cost of the product series. Furthermore, the assembly of peripheral parts for the Martens intermittent gear requires meticulous management of the assembly process to ensure the meshing and contact switching performance of the Martens intermittent gear. However, the assembly process for creating two systems is equivalent to manufacturing two completely different tap selectors. Therefore, in the existing example, separate process management is required, raising concerns about decreased productivity and reduced product quality.

[0191] In contrast, according to this embodiment, the 10-contact tap selector 101 and the 12-contact tap selector 102 can use a common gear base 70, a common Geneva drive 20, a common fixed contact 135, and a common fixing plate 130, respectively. For example, by replacing the 10-contact Martens intermittent stop block 60 and the 12-contact Martens intermittent stop block 160 with respect to the stop mounting recess 71 of the gear base 70, a 10-contact Martens intermittent gear 50 and a 12-contact Martens intermittent gear 150 can be manufactured, respectively. For example, by mounting six fixed contacts 135 on the fixing plate 130, a 12-contact upper fixing unit UT12 (a 12-contact lower fixing unit LT12) can be formed. For example, by adding a contact connecting member 136 to the 12-contact upper fixing unit UT12, a 10-contact upper fixing unit UT10 can be formed. For example, by removing one fixed contact 135 from the 12-contact lower fixing unit LT12, a 10-contact lower fixing unit LT10 can be formed. In this way, by using common parts for both the 10-contact tap selector 101 and the 12-contact tap selector 102, each tap selector 101 and 102 can be manufactured with only a limited number of small parts replaced. Therefore, the 10-contact tap selector 101 and the 12-contact tap selector 102 can be manufactured separately using common parts. For example, by using common parts as part of the entire product series, the number of parts is not divided, reducing cost deviations between product series and achieving overall cost stabilization for the product series. Furthermore, it is possible to achieve both cost reduction from the commonality of the four main parts of the tap selector and time reduction from the standardization of the assembly process. Moreover, since the assembly process of the peripheral parts of the Martens intermittent gear is reduced to a single system, increased productivity and improved product quality can be achieved.

[0192] Next, refer to Figure 33 The second embodiment will be described. In the second embodiment, descriptions of structures identical to those in the first embodiment will be omitted. In embodiment 12, the structure of the contact tap selector differs from that in the first embodiment.

[0193] Figure 33 This is a perspective view of the 12-contact tap selector 202 of the second embodiment.

[0194] like Figure 33 As shown, the 12-contact tap selector 202 includes a Geneva drive 20 and a 12-contact Martens intermittent gear 150. Figure 33 In the middle, it is displayed through the upper plate 10.

[0195] The 12-contact tap selector 202 of the second embodiment does not have a component that functions only when the tap is driven three times. The 12-contact tap selector 202 of the second embodiment is different from the 102-contact tap selector 102 of the first embodiment (see reference 102). Figure 26 It does not have a switching slider 80, a slider guide plate 90, a 3x drive cam follower 85, a control roller shaft 86, a slider control roller 87, etc. (see reference) Figure 4 ).

[0196] According to the second embodiment, the 12-contact tap selector 202 does not have a component that only functions when driven by 3 taps, thereby achieving the following effect.

[0197] This allows for the reduction of parts and lower costs. Typically, in small-capacity devices, a 10-contact tap selector capable of handling up to 19 taps can cover most critical scenarios. Therefore, the number of 12-contact Markov stoppers is significantly less compared to the 10-contact Markov stoppers. Consequently, the 12-contact Markov stoppers are more expensive than the 10-contact ones. However, by eliminating parts that only function when there are 3 times the number of taps, this cost difference can be offset. As a result, the cost of both the 10-contact and 12-contact tap selectors can be made substantially the same, leading to an overall improvement in product competitiveness.

[0198] Next, variations of the implementation method will be described.

[0199] The Martens intermittent gear of this embodiment has a combined groove formed by the combination of a stop-side half-groove and a base-side half-groove. Alternatively, the Martens intermittent gear may not have a combined groove. For example, the multiple grooves of the Martens intermittent gear may only include the base-side groove and the stop-side groove. For example, the shape of the grooves of the Martens intermittent gear can be changed according to required specifications.

[0200] The Geneva drive of this embodiment includes a first limiting part and a second limiting part that restrict the rotation of the Martens intermittent gear before and after the switching operation of the Martens intermittent gear. Alternatively, the Geneva drive may not have either the first or second limiting part. For example, the other of the first or second limiting part may be provided on a component other than the Geneva drive. For example, the arrangement of the limiting part can be changed according to required specifications.

[0201] The tap selector in this implementation uses a single switching method. In contrast, a tap selector can also use a parallel switching method. For example, the switching method of the tap selector can be changed according to required specifications.

[0202] The tap selector embodiments illustrate a 10-contact tap selector or a 12-contact tap selector. Conversely, a tap selector can also be for contacts other than 10 or 12 contacts. For example, the number of taps on the tap selector can be varied according to required specifications.

[0203] According to at least one embodiment described above, for a given type of gear base stop recess, different types of Martens intermittent stops can be replaced. Therefore, even when dealing with varying tap numbers, an increase in the number of parts can be suppressed.

[0204] Several embodiments of the present invention have been described, but these embodiments are provided by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in many other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included within the scope and spirit of the invention, and are also included within the scope of the invention as described in the claims and its equivalents.

[0205] Explanation of reference numerals in the attached figures

[0206] 1 Tap Selector

[0207] 20 Geneva Drive

[0208] 41 First driver-side limiting section (first limiting section)

[0209] 42 Second drive side limiting section

[0210] 50 10 contact Martens intermittent gear (Martens intermittent gear)

[0211] 55 Combination Slot

[0212] 56-slot internal clearance section

[0213] 57 dividing line

[0214] 60 10 contacts with Martens intermittent stop

[0215] 62-stop block side half groove

[0216] 70 Gear Base

[0217] 71 Stop block mounting recess

[0218] 73 Base Side Half Groove

[0219] 80 Switch slider

[0220] 101 10-Contact Tap Selector (Tap Selector)

[0221] 102 12-Contact Tap Selector

[0222] 130 fixed plate

[0223] 131 contact mounting recess

[0224] 132 Connecting Component Mounting Section

[0225] 135 fixed contact

[0226] 136 contact connection components

[0227] 150 12-contact Martens intermittent gear

[0228] 160 12 contacts with Martens intermittent stop

[0229] 162 stop block side half groove

[0230] 202 12-Contact Tap Selector (Tap Selector)

Claims

1. A tap selector for a load-controlled tap switch, characterized in that, have: Geneva drive, which is capable of rotation; and Martensian intermittent gears rotate in conjunction with the rotation of the Geneva drive; The Martens intermittent gear has the following features: Martens intermittent stop, which is disposed in part of the rotation direction of the Martens intermittent gear; as well as A gear base having a stop mounting recess for detachably mounting the Martens intermittent stop; For the stop mounting recess of a gear base of one type, different types of Martens intermittent stops can be replaced.

2. The tap selector of the load tap switcher according to claim 1, characterized in that, It includes a switching slider that is slidably supported on the Geneva drive in a manner that allows it to move forward and backward relative to the Martens intermittent gear. The switching slider moves toward the Martens intermittent gear in conjunction with the rotation of the Geneva drive, engaging with the Martens intermittent stop and only the Martens intermittent stop in the gear base.

3. The tap selector of the load tap switcher according to claim 2, characterized in that, The switching slider changes the amount of protrusion outward from the center of rotation of the Geneva actuator according to the rotation angle of the Geneva actuator.

4. The tap selector of the load tap switcher according to claim 3, characterized in that, The protrusion amount when the switching slider is engaged with the Marcel intermittent stop is smaller than the protrusion amount when the switching slider is not engaged with the Marcel intermittent stop.

5. The tap selector of the load tap switcher according to any one of claims 1 to 4, characterized in that, The Martens intermittent stop has stop side grooves at both ends in the direction of rotation. The gear base has base side half-grooves at both ends of the stop mounting recess in the rotation direction. The Martens intermittent gear has a combined groove formed by the combination of the stop side half groove and the base side half groove. The fitting groove has an in-groove clearance portion to avoid the engaging parts. The dividing line between the Martens intermittent stop and the gear base is positioned within the clearance portion of the slot.

6. The tap selector of the load tap switcher according to any one of claims 1 to 4, characterized in that, The Geneva drive features: The first limiting part restricts the rotation of the Martens intermittent gear in one direction before and after the switching of the first switching action, and restricts the rotation of the Martens intermittent gear in another direction opposite to the rotation in the first direction before and after the switching of the second switching action, which is different from the first switching action. as well as The second limiting part restricts the rotation of the Martens intermittent gear in the other direction before and after the switching of the first switching action, and restricts the rotation of the Martens intermittent gear in the first direction before and after the switching of the second switching action.

7. The tap selector of the load tap switcher according to any one of claims 1 to 4, characterized in that, have: Multiple fixed contacts; Contact connection component, which connects two of the plurality of fixed contacts; and Circular fixing plate; The fixing plate has: A contact mounting recess for detachably mounting the fixed contact; and A connecting component mounting part, which detachably mounts the contact connecting component; The contact mounting recesses are provided at intervals around the circumference of the fixing plate. The connecting component mounting portion is disposed between two adjacent contacts in the circumferential direction of the fixing plate among the plurality of contact mounting recesses.

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