A three-station electric mechanism for direct-driven large-torque common box

Abstract

The present invention provides a three-station electric mechanism for a motor-direct-driven large torque common box, which relates to the field of combined electrical appliances, including a mechanism frame, a power input assembly, a transmission assembly and an output assembly, wherein the power input assembly is connected to the output assembly through the transmission assembly, the output end of the motor of the power input assembly is connected to the transmission screw, the transmission nut is meshed with the transmission screw, a mounting column is provided on the transmission nut, and a roller is installed on the mounting column; a driving groove matching the roller is provided on the driving plate of the transmission assembly, and the distance between the outer edge of the driving groove and the axis of the driving plate shaft is greater than or equal to the distance between the transmission screw and the axis of the driving plate shaft; the output gear of the output assembly is meshed with the large gear of the transmission assembly. This kind of electric mechanism has a compact structure, a simple mechanism frame processing technology, and a low production cost; the transmission nut has a large stroke, and the output gear has a low output speed and a large output torque while meeting the requirements of the opening and closing time, which can effectively solve the problem of burning the motor caused by the jamming of the three-station switch body.

Description

Technical Field

[0001] The invention belongs to the field of combined electrical appliances, and in particular relates to a three-station electric mechanism for a motor-direct-driven large-torque common box. Background Art

[0002] In recent years, with the development of gas-insulated metal switchgear, especially in 126kV common-box GIS, three-position isolating and grounding switches have been increasingly adopted by manufacturers due to their small size, compact structure, high complexity, flexible and diverse configuration, and the ability to achieve mechanical interlocking of isolating switches and grounding switches, thereby improving reliability and many other advantages.

[0003] However, the operating mechanism of the three-position isolating grounding switch currently used has poor reliability and a high failure rate. After years of use, the torque of the three-position isolating grounding switch increases, and the three-position mechanism often fails to drive the switch, affecting the progress of power construction and, in serious cases, affecting personnel safety. Obviously, new technical means are needed to solve this problem. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a three-station electric mechanism for a motor-direct-driven large-torque common box to solve the above-mentioned technical problems.

[0005] The present invention provides a three-station electric mechanism for a motor-direct-driven large-torque common box, comprising a mechanism frame, a power input assembly, a transmission assembly and an output assembly, wherein the power input assembly, the transmission assembly and the output assembly are mounted on the mechanism frame, and the power input assembly is connected to the output assembly through the transmission assembly; the power input assembly comprises a motor, a transmission screw, a transmission nut and a roller, the output end of the motor is connected to the transmission screw, the transmission nut is meshed with the transmission screw, a mounting column is provided on the transmission nut, and a roller is mounted on the mounting column; the transmission assembly comprises a drive plate, a drive plate shaft and a large gear, the drive plate and the large gear are mounted on the drive plate shaft, a drive groove matched with the roller is provided on the drive plate, the distance between the outer edge of the drive groove and the axis of the drive plate shaft is greater than or equal to the distance between the transmission screw and the axis of the drive plate shaft; the edge of the drive groove in contact with the roller forms an angle with the axis of the transmission screw; the output assembly comprises an output gear, and the output gear is meshed with the large gear.

[0006] Furthermore, a threaded hole is provided in the middle of the transmission nut, and the mounting column is located in a direction perpendicular to the threaded hole.

[0007] Furthermore, the mounting column includes a long column and a short column, and the roller includes a large roller and a small roller. One large roller and one small roller are mounted on the long column, and two small rollers are mounted on the short column, which are fixed via a shaft with an elastic retaining ring.

[0008] Furthermore, the driving plate includes two driving plates, the driving plate close to the large gear side cooperates with the large roller on the long column, and the driving plate away from the large gear side cooperates with the small roller on the short column.

[0009] Furthermore, the driving plate is a mushroom-shaped structure, the driving groove is located between the cap structure and the stem structure, and the edge of the stem structure in contact with the roller forms an angle of 1 to 2 degrees with the axis of the transmission screw.

[0010] Furthermore, tapered roller bearings, baffles, disc springs and retaining rings are respectively installed at both ends of the transmission screw. The tapered roller bearing is located at the end of the transmission screw, the baffle is adjacent to the tapered roller bearing, the retaining ring includes a small retaining ring and a large retaining ring, the small retaining ring is located on the side away from the motor, and the large retaining ring is located on the side close to the motor, the disc springs are respectively located between the baffle and the small retaining ring and between the baffle and the large retaining ring, and the transmission nut is adjacent to the large retaining ring.

[0011] Furthermore, the power input assembly is provided with a monitoring device, which includes a travel switch, a switch mounting plate and a switch action plate. The travel switch is fixed to the switch mounting plate by screws, the switch mounting plate is fixed to the mechanism frame by screws, the switch action plate is installed on the transmission nut, and the travel switch monitors the position of the switch action plate, thereby monitoring the position of the transmission nut.

[0012] Furthermore, bearings, small spacers, drive plates, large spacers, drive plates, small spacers, bearings, middle spacers and large gears are sequentially installed on the drive plate shaft, and the axial displacement of the parts on the shaft is limited by elastic retaining rings at both ends, and the displacement of the bearings at both ends is limited by pressure plates fixed on the mechanism frame.

[0013] Furthermore, one end of the output gear is mounted on a bearing in the mechanism frame, and the other end is mounted on a bearing in a gear seat, and the gear seat is fixed to the mechanism frame by screws.

[0014] The beneficial effect of the present invention is that the motor-direct-driven large-torque common-box three-station electric mechanism provided by the present invention has a simple structure. Specifically, when the transmission nut moves linearly along the transmission screw, the roller will be inserted into the driving groove of the driving plate, so that the driving plate rotates to drive the large gear to rotate, and then the torque is output through the rotation of the large gear and the output gear, thereby ensuring the long-term and effective operation of the three-station mechanism.

[0015] In addition, since the distance between the outer edge of the driving groove of the driving plate and the axis is greater than or equal to the distance between the transmission screw and the axis, the cooperation between the driving plate and the rollers on the transmission nut constitutes a mechanical lock, which can mechanically ensure that the isolation side and the grounding side will not be closed at the same time.

[0016] The edge of the driving groove in contact with the roller forms an angle with the axis of the transmission screw; this can prevent the transmission nut from flattening the disc spring due to movement inertia, effectively solving the problem of easy motor burnout in traditional three-station electric mechanisms.

[0017] This type of electric mechanism has a compact structure, is safe and reliable, has a simple frame processing technology, and has a low production cost; the transmission nut has a large stroke, and the output gear has a low output speed and a large output torque while meeting the opening and closing time requirements, which can effectively solve the problem of motor burning caused by the jamming of the three-position switch body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 for Figure 1 AA cross-sectional view of ;

[0021] Figure 3 for Figure 1 BB cross-sectional view;

[0022] Figure 4 for Figure 1 Schematic diagram of C direction;

[0023] Figure 5 is a schematic diagram of the main view of the transmission nut;

[0024] Figure 6 is a top view schematic diagram of the transmission nut;

[0025] Figure 7 It is a left side schematic diagram of the transmission nut;

[0026] Figure 8 This is a schematic diagram of the main structure of the present invention when the grounding side is closed;

[0027] Fig. 9 It is a schematic diagram of the main structure of the present invention when the isolation side is closed.

[0028] Fig.10 It is a schematic diagram of the structure of the driving plate of the present invention.

[0029] In the figure, 1, mechanism frame, 2, bearing seat, 3, tapered roller bearing, 4, baffle, 5, small retaining ring, 6, travel switch, 7, switch mounting plate, 8, transmission nut, 9, switch action plate, 10, large retaining ring, 11, disc spring, 12, transmission screw, 13, motor, 14, coupling, 15, mounting plate, 16, spacer, 17, large gear, 18, middle spacer, 19, drive plate shaft, 20, bearing, 21, small spacer, 22, pressure plate, 23, drive plate, 24, large spacer, 25, small roller, 26, large roller, 27, output gear, 28, gear seat. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] A motor-driven, high-torque, common-box, three-station electric mechanism, comprising a mechanism frame 1, a power input assembly, a transmission assembly, and an output assembly, wherein the power input assembly, the transmission assembly, and the output assembly are mounted on the mechanism frame 1, and the power input assembly is connected to the output assembly via the transmission assembly; the power input assembly comprises a motor 13, a transmission screw 12, a transmission nut 8, and a roller, wherein the output end of the motor 13 is connected to the transmission screw 12, the transmission nut 8 is meshed with the transmission screw 12, a mounting column is provided on the transmission nut 8, and a roller is mounted on the mounting column ; The transmission assembly includes a drive plate 23, a drive plate shaft 19 and a large gear 17, the drive plate 23 and the large gear 17 are installed on the drive plate shaft 19, the drive plate 23 is provided with a drive groove that cooperates with the roller, the distance between the outer edge of the drive groove and the axis of the drive plate shaft 19 is greater than or equal to the distance between the drive screw 12 and the axis of the drive plate shaft 19; the edge of the drive groove that contacts the roller and the axis of the drive screw 12 forms an angle; the output assembly includes an output gear 27, and the output gear 27 is meshed with the large gear 17.

[0032] like Figure 2 , Figure 5 , Figure 6 , Figure 7 As shown, a threaded hole is provided in the middle of the driving nut 8, and the mounting column is located in a direction perpendicular to the threaded hole.

[0033] The mounting column includes a long column and a short column, and the roller includes a large roller 26 and a small roller 25. One large roller 26 and one small roller 25 are installed on the long column, and two small rollers 25 are installed on the short column, which are fixed by a shaft with an elastic retaining ring.

[0034] As a preference, Fig.10 As shown, the driving plate 23 is a mushroom-shaped structure, the driving groove is located between the cap structure and the stem structure, and the side of the stem structure in contact with the roller forms an angle of 1 to 2° with the axis of the transmission screw 12. Here, the angle is preferably 1.5°. Whether in the open or closed state, the beveled side of the driving plate 23 in contact with the large roller 26 and the small roller 25 forms an angle of 1.5° with the axis of the transmission screw 12, which can prevent the transmission nut 8 from flattening the disc spring 11 due to the inertia of movement, and effectively solve the problem of easy burning of the motor 13 in the traditional three-station electric mechanism.

[0035] The driving plates 23 include two. The driving plate 23 close to the large gear 17 cooperates with the large roller 26 on the long column, and the driving plate 23 away from the large gear 17 cooperates with the small roller 25 on the short column.

[0036] The bearing seat 2 is fixed to the mechanism frame 1 by bolts; the motor 13 is fixed to the mechanism frame 1 by bolts through the mounting plate 15 and the spacer sleeve 16, and is connected to the transmission screw 12 by the coupling 14.

[0037] The two ends of the transmission screw 12 are respectively installed with a tapered roller bearing 3, a baffle 4, a disc spring 11 and a retaining ring. The tapered roller bearing 3 is located at the end of the transmission screw 12, the baffle 4 is adjacent to the tapered roller bearing 3, and the retaining ring includes a small retaining ring 5 and a large retaining ring 10. The small retaining ring 5 is located on the side away from the motor, and the large retaining ring is located on the side close to the motor. The disc spring 11 on the side away from the motor 13 is located between the baffle 4 and the small retaining ring 5, and the disc spring 11 on the side close to the motor 13 is located between the baffle 4 and the large retaining ring 10, and the transmission nut 8 is adjacent to the large retaining ring 10.

[0038] The power input assembly is provided with a monitoring device, which includes a travel switch 6, a switch mounting plate 7 and a switch action plate 9. The travel switch 6 is fixed to the switch mounting plate 7 by screws, and the switch mounting plate 7 is fixed to the mechanism frame 1 by screws. The switch action plate 9 is installed on the transmission nut 8. The travel switch 6 monitors the position of the switch action plate 9, that is, monitors the position of the transmission nut 8.

[0039] The driving plate shaft 19 is sequentially mounted with a bearing 20, a small spacer 21, a driving plate 23, a large spacer 24, a driving plate 23, a small spacer 21, a bearing 20, a middle spacer 18 and a large gear 17. The axial displacement of the parts on the shaft is limited by elastic retaining rings at both ends, and the displacement of the bearings 20 at both ends is limited by a pressure plate 22 fixed on the mechanism frame 1.

[0040] One end of the output gear 27 is mounted on a bearing in the mechanism frame 1 , and the other end is mounted on a bearing in a gear seat 28 . The gear seat 28 is fixed to the mechanism frame 1 by screws.

[0041] like Figure 8 As shown, the implementation method of the present invention is specifically described by taking the grounding side closing as an example. After receiving the grounding side closing command, the grounding side motor 13 rotates forward, driving the driving nut 8 on this side to move linearly in the closing direction along the matching groove on the mechanism frame 1. When the switch action plate 9 fixed on the driving nut 8 hits the travel switch 6 installed on the switch mounting plate 7, the grounding side motor 13 is cut off, and the driving nut 8 continues to move in the closing direction due to the inertia of movement until it hits the small retaining ring 5, and brakes due to the buffering of the disc spring 11 inside it. At this time, the driving plate 23 is driven by the small roller 25 and the large roller 26 on the driving nut 8 to rotate a fixed angle. After the large gear 17 and the output gear 27 are meshed, the mechanism finally outputs a fixed angle, driving the three-position switch to complete the grounding closing.

[0042] After receiving the grounding side opening command, the grounding side motor 13 rotates in the opposite direction, driving the transmission nut 8 on this side to move linearly in the opening direction along the matching groove on the mechanism frame 1. When the switch action plate 9 fixed on the transmission nut 8 hits the travel switch 6 installed on the switch mounting plate 7, the grounding side motor 13 is cut off, and the transmission nut 8 continues to move in the opening direction due to the inertia of movement until it hits the large retaining ring 10, and is braked by the buffering of the internal disc spring 11. At this time, the driving plate 23 is driven by the small roller 25 and the large roller 26 on the transmission nut 8 to rotate a fixed angle. After the large gear 17 and the output gear 27 are meshed, the mechanism finally outputs a fixed angle, driving the three-position switch to complete the grounding opening.

[0043] like Fig. 9 The figure shows the state when the isolation side is closed. The movement principle of the isolation side opening and closing is consistent with that of the grounding side opening and closing.

[0044] The present invention provides a three-station electric mechanism for a motor-direct-driven large torque common box, which has a simple structure. Specifically, when the transmission nut 8 moves linearly along the transmission screw 12, the roller will be inserted into the driving groove of the driving plate 23, so that the driving plate 23 rotates to drive the large gear 17 to rotate, and then the torque is output through the rotation of the large gear 17 and the output gear 27.

[0045] In addition, since the distance between the outer edge of the driving groove of the driving plate 23 and the axis center of the plate shaft 19 is greater than or equal to the distance between the transmission screw 12 and the axis center of the plate shaft 19, the cooperation between the driving plate 23 and the rollers on the transmission nut 8 constitutes a mechanical lock, which can mechanically ensure that the isolation side and the grounding side will not be closed at the same time.

[0046] This electric mechanism has a compact structure, is safe and reliable, the mechanism frame 1 has a simple processing technology and low production cost; the transmission nut 8 has a large stroke, and the output gear 27 has a low output speed and a large output torque while meeting the opening and closing time requirements, which can effectively solve the problem of motor burning caused by the jamming of the three-position switch body.

[0047] Although the present invention has been described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, and all of these shall be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A three-station electric mechanism for a motor-driven high-torque common box, characterized in that: It comprises a machine frame (1), a power input assembly, a transmission assembly and an output assembly, wherein the power input assembly, the transmission assembly and the output assembly are mounted on the machine frame (1), and the power input assembly is connected to the output assembly via the transmission assembly; The power input assembly comprises a motor (13), a transmission screw (12), a transmission nut (8) and a roller, the output end of the motor (13) is connected to the transmission screw (12), the transmission nut (8) is meshed with the transmission screw (12), a mounting column is arranged on the transmission nut (8), and a roller is mounted on the mounting column; The transmission assembly comprises a driving plate (23), a driving plate shaft (19) and a large gear (17); the driving plate (23) and the large gear (17) are mounted on the driving plate shaft (19); a driving groove cooperating with the roller is provided on the driving plate (23); the driving plate (23) is a mushroom-shaped structure, and the driving groove is located between the cap structure and the stem structure; The distance between the outer edge of the driving groove and the axis of the driving plate shaft (19) is greater than or equal to the distance between the driving screw (12) and the axis of the driving plate shaft (19); the edge of the driving groove in contact with the roller forms an angle with the axis of the driving screw (12); The output assembly comprises an output gear (27), and the output gear (27) is meshed with the large gear (17).

2. The motor-driven high-torque three-station electric mechanism for a common box as claimed in claim 1, characterized in that: A threaded hole is provided in the middle of the transmission nut (8), and the mounting column is located in a direction perpendicular to the threaded hole.

3. The motor-driven high-torque three-station electric mechanism for a common box as claimed in claim 1, characterized in that: The mounting column comprises a long column and a short column, and the roller comprises a large roller (26) and a small roller (25). One large roller (26) and one small roller (25) are mounted on the long column, and two small rollers (25) are mounted on the short column.

4. The motor-driven high-torque three-station electric mechanism for a common box as claimed in claim 3, characterized in that: The driving plate (23) includes two driving plates, the driving plate (23) close to the large gear (17) cooperates with the large roller (26) on the long column, and the driving plate (23) away from the large gear (17) cooperates with the small roller (25) on the short column.

5. The motor-driven high-torque three-station electric mechanism for a common box as claimed in claim 1, characterized in that: The edge of the stem structure that contacts the roller and the axis of the transmission screw (12) form an angle of 1 to 2 degrees.

6. The motor-direct-driven high-torque three-station electric mechanism for a common box as claimed in any one of claims 1 to 5, characterized in that: The two ends of the transmission screw (12) are respectively installed with a tapered roller bearing (3), a baffle (4), a disc spring (11) and a retaining ring. The tapered roller bearing (3) is located at the end of the transmission screw (12). The baffle (4) is adjacent to the tapered roller bearing (3). The retaining ring includes a small retaining ring (5) and a large retaining ring (10). The small retaining ring (5) is located on a side away from the motor, and the large retaining ring (10) is located on a side close to the motor. The disc spring (11) is respectively located between the baffle (4) and the small retaining ring (5) and between the baffle (4) and the large retaining ring (10). The transmission nut (8) is adjacent to the large retaining ring (10).

7. The motor-direct-driven high-torque three-station electric mechanism for a common box as claimed in any one of claims 1 to 5, characterized in that: The power input assembly is provided with a monitoring device, which comprises a travel switch (6), a switch mounting plate (7) and a switch action plate (9), wherein the travel switch (6) is fixed to the switch mounting plate (7) by screws, the switch mounting plate (7) is fixed to the mechanism frame (1) by screws, the switch action plate (9) is mounted on the transmission nut (8), and the travel switch (6) monitors the position of the switch action plate (9).

8. The motor-direct-driven high-torque three-station electric mechanism for a common box as claimed in any one of claims 1 to 5, characterized in that: The drive plate shaft (19) is sequentially mounted with a bearing (20), a small spacer (21), a drive plate (23), a large spacer (24), a drive plate (23), a small spacer (21), a bearing (20), a middle spacer (18) and a large gear (17); axial displacement of parts on the shaft is limited by shaft elastic retaining rings at both ends; and displacement of the bearings (20) at both ends is limited by a pressure plate (22) fixed to the mechanism frame (1).

9. The motor-direct-driven high-torque three-station electric mechanism for a common box as claimed in any one of claims 1 to 5, characterized in that: One end of the output gear (27) is mounted on a bearing in the mechanism frame (1), and the other end is mounted on a bearing in a gear seat (28); the gear seat (28) is fixed to the mechanism frame (1) by screws.

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