Tap switch electric operating mechanism with stroke limiting function

Abstract

The utility model relates to the field of transformer tap switch accessories, and discloses a tap switch electric operating mechanism with a stroke limiting function, which comprises a case, a gearbox, an indicating device, a motor, an output shaft and a stroke limiting mechanism, the case comprises a case body and a case cover, the motor is fixed in the case body, the output end of the motor is connected with the output shaft through the transmission mechanism, one end of the output shaft is fixedly connected with the input end of the gearbox, the other end of the output shaft extends out of the case and is in transmission connection with the tap switch, and the output end of the gearbox is connected with the indicating device; the stroke limiting mechanism comprises a limiting block and a check block, the limiting block is fixedly connected with the output shaft, and the check block is in transmission connection with the first output shaft of the gearbox. According to the tap switch electric operating mechanism with the stroke limiting function, a mechanical limiting mode is used, when the output shaft of the tap switch electric operating mechanism rotates to a termination point, the tap switch electric operating mechanism can be reliably stopped, and operation errors of the tap switch caused by the fact that a control system cannot control a motor to stop can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer tap switch accessory field especially, tap switch electric operating mechanism with stroke limit. BACKGROUND

[0002] Tap switch is usually used on transformer, is used for adjusting voltage ratio, tap switch electric mechanism is the drive and control system of transformer on-load tap changer, can realize transformer accurate, reliable, safe regulation. When tap switch electric mechanism reaches the highest grade or the lowest grade in movement, motor stops rotating by control system signal, this stop mode will fail to some extent because of control system or motor failure, makes tap switch electric operating mechanism reach the highest grade or the lowest grade, cannot reliably stop, causes tap switch operating error, thereby leads to the consequence such as part bending, deformation, setting fracture, tap switch selector contact misplacement, disengaging track. SUMMARY

[0003] Therefore, the utility model discloses a tap switch electric operating mechanism with stroke limit, which can solve the problems in the prior art.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] A tap switch electric operating mechanism with stroke limit, comprising: a case, a gear box, an indicating device, a motor, an output shaft, a stroke limiting mechanism and a manual operating device;

[0006] The case comprises a case body and a case cover, the motor is fixed inside the case body, the output end of the motor is connected to the output shaft through a transmission mechanism, one end of the output shaft is fixedly connected to the input end of the gear box, the other end of the output shaft extends out of the case and is drivingly connected to the tap switch, the output end of the gear box is connected to the indicating device, and the manual operating device is drivingly connected to the gear box.

[0007] The stroke limiting mechanism comprises a limiting block and a stop block, the limiting block is fixedly connected to the output shaft, and the stop block is drivingly connected to the first output shaft of the gear box.

[0008] In a preferred embodiment, the stroke limiting mechanism further comprises a poking block, a rotating block and a torsional spring.

[0009] The limiting block is provided with a limiting protrusion, the poking block is fixedly connected to the first output shaft, and a poking protrusion is arranged on the poking block, the stop block and the rotating block are respectively fixed at two ends of a rotating shaft, and the rotating shaft is rotatably connected to the case body, the torsional spring is sleeved outside the rotating shaft, and the torsional spring makes the rotating block face the poking block.

[0010] In a preferred embodiment, the stop block is provided with a concave circular arc, and under the action of the torsion spring, the concave circular arc is concentric with the convex, and the radius of the concave circular arc is greater than the rotation radius of the convex.

[0011] In a preferred embodiment, the rotating shaft is rotatably connected to a fixed plate, and the fixed plate is fixedly connected to the case body.

[0012] In a preferred embodiment, the torsion spring comprises two outer arms and a torsion spring body, the torsion spring body is helical, and is sleeved outside the rotating shaft, the first pin is fixed on the lower surface of the stop block, the second pin is fixedly connected to the upper surface of the fixed plate, and the first pin and the second pin are located between the two outer arms.

[0013] In a preferred embodiment, the two outer arms are parallel.

[0014] In a preferred embodiment, the distance between the two outer arms is equal to the diameter of the first pin and the second pin.

[0015] The utility model discloses a tap switch electric operating mechanism with stroke limit, which comprises: a case, a gear box, an indicating device, a motor, an output shaft and a stroke limiting mechanism, wherein the case comprises a case body and a case cover, the motor is fixed inside the case body, the output end of the motor is connected to the output shaft through a transmission mechanism, one end of the output shaft is fixedly connected to the input end of the gear box, the other end of the output shaft extends out of the case and is transmissionally connected to a tap switch, and the output end of the gear box is connected to the indicating device; the stroke limiting mechanism comprises a limiting block and a stop block, the limiting block is fixedly connected to the output shaft, and the stop block is transmissionally connected to the first output shaft of the gear box.

[0016] The tap switch electric operating mechanism with stroke limit disclosed in the application uses a mechanical limiting mode, so that the output shaft of the tap switch electric operating mechanism can be reliably stopped when reaching the terminal point, and the problem that the tap switch electric operating mechanism cannot be reliably stopped after reaching the highest gear or the lowest gear when the electrical limiting is in failure in the control system or the motor is in failure in the prior art is solved.

[0017] When the tap switch electric operating mechanism is manually operated, the control system cannot control the input shaft to stop rotating, and the input shaft can be stopped rotating by relying on the mechanical stroke limiting mechanism disclosed in the application. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0019] Figure 1 Structure diagram of the electric operating mechanism of the tap switch with travel limit according to an embodiment of the present disclosure;

[0020] Figure 2 Structure diagram of the electric operating mechanism of the tap switch with travel limit according to an embodiment of the present disclosure (remove the machine box);

[0021] Figure 3 Structure diagram of the travel limit mechanism according to an embodiment of the present disclosure;

[0022] Figure 4 Structure diagram of the travel limit mechanism according to an embodiment of the present disclosure;

[0023] Figure 5 Structure diagram of Figure 4 Enlarged view of A shown in the figure;

[0024] Figure 6 Structure diagram of the limit block and the stop block according to an embodiment of the present disclosure;

[0025] Figure 7 Structure diagram of another working state of the limit block and the stop block according to an embodiment of the present disclosure;

[0026] Figure 8 Structure diagram of the rotating block according to an embodiment of the present disclosure;

[0027] Figure 9 Structure diagram of the torsion spring fixing according to an embodiment of the present disclosure.

[0028]

Explanation of main component symbols

[0029] 1, machine box;

[0030] 11, machine box body; 12, machine box cover;

[0031] 2, gear box;

[0032] 21, first output shaft;

[0033] 3, indicating device;

[0034] 4, motor;

[0035] 5, output shaft;

[0036] 6, travel limit mechanism;

[0037] 61, limit block; 62, stop block; 63, rotating block; 64, rotating block; 65, torsion spring; 66, rotating shaft; 67, fixing plate;

[0038] 611, limiting protrusion; 621, concave arc; 631, poking protrusion;

[0039] 7. A manually operated device. DETAILED DESCRIPTION

[0040] The electric operating mechanism of a tap changer is further described in detail below in combination with the drawings and embodiments of the present application.

[0041] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflicts. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0042] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a presence of a feature, step, operation, device, component and / or combinations thereof.

[0043] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0044] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0045] Referring to Figures 1-9 The utility model provides a technical scheme:

[0046] As Figure 1 And Figure 2 As shown in ( Figure 2 Hide the case), a tap switch electric operating mechanism with stroke limit, comprising: case 1, gear box 2, indicating device 3, motor 4, output shaft 5, stroke limit mechanism 6 and manual operating device 7;

[0047] The case includes case body 11 and case cover 12, the motor 4 is fixed in the case body 11 inside, and the output end of the motor 4 is connected with the output shaft 5 through a transmission mechanism, one end of the output shaft 5 is fixedly connected with the input end of the gear box 2, the other end of the output shaft 5 extends out of the case and is connected with the tap switch transmission, the output end of the gear box 2 is connected with the indicating device 3, and the manual operating device 7 is connected with the gear box 2 transmission.

[0048] The stroke limit mechanism 6 includes limiting block 61 and stop block 62, the limiting block 61 is fixedly connected with the output shaft 5, and the stop block 62 is connected with the first output shaft 21 of the gear box 2 transmission.

[0049] The motor 4 rotates to drive the output shaft 5 to rotate, thereby driving the tap switch to act, and the output shaft 5 is fixedly connected to the input end of the gear box 2, so that the input end of the gear box 2 rotates with the output shaft 5, and the gear box 2 drives the indicating device 3 through gear transmission to make the indicating device 3 display the current working state. The first output shaft 21 of the gear box 2 is connected to the input end of the gear box through gear transmission, and the transmission ratio is N. When the first output shaft 21 rotates to a specific position, the stop block 62 rotates to the position of the limiting block 61 to limit the rotation of the limiting block 61, thereby limiting the rotation of the output shaft 5. Since the first output shaft 21 is connected to the input end of the gear box through gear transmission with a transmission ratio of N, the output shaft 5 rotates N times, and the stop block 62 rotates one circle with the first output shaft 21.

[0050] The tap switch electric operating mechanism with stroke limiting disclosed in the application uses a mechanical limiting mode to reliably stop the output shaft 5 of the tap switch electric operating mechanism when it rotates to the end point, avoid the operation error of the tap switch caused by the failure of the control system to control the motor to stop, and solve the problem that the tap switch electric operating mechanism cannot be reliably stopped when it rotates to the highest or lowest gear due to the failure of the control system to control the motor to stop, thereby causing the operation error of the tap switch.

[0051] When the tap switch electric operating mechanism is manually operated, the control system cannot control the input shaft to stop rotating, and the mechanical stroke limiting mechanism disclosed in the application can be relied on to stop the rotation of the input shaft.

[0052] As shown in Figure 3 , Figure 4 and Figure 5 , the stroke limiting mechanism (6) (and Figure 3 and Figure 4 ) hides the case 1 and the belt transmission), and the stroke limiting mechanism 6 further comprises a rotating block 64, a torsional spring 63, a rotating block 64 and a torsional spring 63; the limiting block 61 is provided with a limiting protrusion 611; the rotating block 63 is fixedly connected to the first output shaft 21, and the rotating block 63 is provided with a rotating protrusion 631; the stop block 62 and the rotating block 64 are respectively fixed at both ends of the rotating shaft 66, and the rotating shaft 66 is rotatably connected to the case body 11; the torsional spring 65 is sleeved outside the rotating shaft 66, and the torsional spring 65 makes the rotating block 64 face the rotating block 63;

[0053] When the rotating protrusion 631 rotates to the position of the rotating block 64 with the rotating block 63, the rotating block 63 continues to rotate to rotate the rotating block 64, at this time, the rotating shaft 66 rotates to drive the stop block 62 to rotate, and the rotated stop block 62 limits the rotation of the limiting block 61, thereby limiting the rotation of the output shaft 5.

[0054] The stop block 62 is provided with a concave arc 621, and the concave arc 621 is concentric with the convex 611 under the action of the torsion spring 63. The radius of the concave arc 621 is greater than the rotating radius of the convex 611. Thus, under the action of the torsion spring 65, the limiting block 61 rotates with the output shaft 6, and the stop block 62 does not interfere with the rotation of the limiting block 61. The working state is shown in Figure 6 If the rotating block 64 is rotated by the rotating block 63, the stop block 62 rotates, and after rotation, the concave arc 621 is not concentric with the convex 611, as shown in Figure 6 The stop block 62 interferes with the rotation of the limiting block 61, and the limiting block 61 cannot rotate, thereby braking the output shaft 6, as shown in Figure 7 .

[0055] In order to facilitate the installation and layout of the rotating shaft 66, the rotating shaft 66 is rotatably connected to the fixed plate 67, and the fixed plate 67 is fixedly connected to the cabinet body 11.

[0056] The torsion spring 65 is fixedly connected to the fixed plate 67, and the fixed plate 67 is fixedly connected to the cabinet body 11. Figure 9 The torsion spring 65 includes two outer arms 651 and a torsion spring body 652. The torsion spring body 652 is helical and is sleeved outside the rotating shaft 66. The first pin 653 is fixed to the lower surface of the stop block 62, and the second pin 654 is fixedly connected to the upper surface of the fixed plate 67. The first pin 653 and the second pin 654 are located between the two outer arms 651. Thus, when the stop block 62 rotates, the first pin 653 rotates with the stop block 62. At this time, since the second pin 654 is fixed, the two outer arms 651 of the torsion spring are separated, the torsion spring generates a torsion force, and the direction of the torsion force is to restore the first pin 653 to the original position between the two outer arms 651. Therefore, under the action of the torsion spring 65, the rotating shaft 66 is kept in the position where the rotating block 64 faces the rotating block 63.

[0057] In order to facilitate the interaction between the first pin 653, the second pin 654 and the torsion spring 65, the two outer arms 651 are parallel, and the distance between the two outer arms 651 is equal to the diameter of the first pin 653 and the second pin 654.

[0058] The above is only a preferred embodiment of the present application, and is not used to limit the protection scope of the present application.

Claims

1. A tap changer motor operated mechanism with travel limit, characterized in that, The utility model relates to a kind of electric power distribution switchgear, including: Cabinet (1), gear box (2), indicating device (3), motor (4), output shaft (5), stroke limiting mechanism (6) and manual operating device (7); The cabinet includes cabinet body (11) and cabinet cover (12), the motor (4) is fixed inside cabinet body (11), the output end of the motor (4) is connected output shaft (5) by transmission mechanism, one end of the output shaft (5) is fixedly connected with the input end of gear box (2), the other end of the output shaft (5) extends from the cabinet and is connected with tap switch transmission, the output end of the gear box (2) is connected with indicating device (3), the manual operating device (7) is connected with gear box (2) transmission; The stroke limiting mechanism (6) includes limiting block (61), stop block (62), the limiting block (61) is fixedly connected with output shaft (5), the stop block (62) is connected with the first output shaft (21) of gear box (2) transmission.

2. A motor operated mechanism for tap changer with travel limit according to claim 1, characterized in that, The stroke limiting mechanism (6) further includes: knob (63), rotating block (64) and torsion spring (65); The limiting block (61) is provided with limiting protrusion (611), the knob (63) is fixedly connected with the first output shaft (21), and the knob (63) is provided with knob protrusion (631), the stop block (62) and rotating block (64) are fixed at both ends of rotating shaft (66) respectively, and the rotating shaft (66) is rotatably connected with cabinet body (11), the torsion spring (65) is sleeved outside the rotating shaft (66), and the torsion spring (65) makes rotating block (64) towards knob (63).

3. A motor operated mechanism for tap changer with travel limit according to claim 2, characterized in that, The stop block (62) is provided with concave arc (621), under the action of torsion spring (65), the concave arc (621) is concentric with protrusion (611), and the radius of concave arc (621) is greater than the rotation radius of protrusion (611).

4. A tap changer motor operated mechanism with travel limit according to claim 3, characterized in that The rotating shaft (66) is rotatably connected with fixed plate (67), and the fixed plate (67) is fixedly connected with cabinet body (11).

5. A motor operated mechanism for tap changer with travel limit according to claim 4, characterized in that, The torsion spring (65) includes two outer arms (651) and torsion spring body (652), the torsion spring body (652) is helical, is sleeved outside the rotating shaft (66), the first pin (653) is fixed on the lower surface of the stop block (62), the second pin (654) is fixedly connected on the upper surface of the fixed plate (67), and the first pin (653) and the second pin (654) are located between the two outer arms (651).

6. A motor operated mechanism for tap changer with travel limit according to claim 5, characterized in that, The two outer arms (651) are parallel.

7. A motor operated mechanism for tap changer with travel limit according to claim 6, characterized in that, The distance between the two outer arms (651) is equal to the diameter of the first pin (653) and the second pin (654).

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