Contact arm structure of disconnecting switch

Abstract

The utility model relates to the technical field of disconnecting switches, in particular to a contact arm structure of a disconnecting switch, which comprises a moving contact arm, a first contact and a second contact, the first contact and the second contact are respectively arranged at two ends of the moving contact arm, the moving contact arm comprises two side panels, a limit piece is arranged between the two side panels, and the limit piece is arranged between the two side panels. The limiting piece comprises a first limiting semicircle and a second limiting semicircle, two positioning clamping shafts are fixedly connected to the first limiting semicircle, and two positioning clamping holes used in cooperation with the positioning clamping shafts are formed in the second limiting semicircle. According to the utility model, the detachable first limiting semicircle and the detachable second limiting semicircle are arranged between the two side panels as limiting pieces, so that the first limiting semicircle and the second limiting semicircle with different thicknesses can be replaced after the distance between the two side panels is adjusted in order to adapt to a second contact, and a more sufficient limiting effect is achieved; and loosening between the two side panels is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of isolating switches, in particular to a contact arm structure of an isolating switch. Background Art

[0002] An isolating switch is a switching device that is mainly used for "isolating power supply, switching operations, and connecting and disconnecting low-current circuits" and has no arc extinguishing function.

[0003] In the prior art, there is an isolating switch with an improved moving contact arm, such as that proposed in patent application number "CN201620147627.4", which includes a moving contact arm, a mounting seat and a static contact. The moving contact arm is connected to the mounting seat. The moving contact arm includes side panels on both sides. There are screw holes on the side panels. The two side panels are connected by screws through the screw holes. There is a limit piece between the two side panels.

[0004] However, in the prior art, for example, the isolating switch with an improved movable contact arm proposed in patent application number "CN201620147627.4", after adjusting the distance between the two side panels to accommodate contacts of different widths, the two side panels must be completely separated before the matching limiter can be replaced, which is inconvenient for replacing the limiter. Utility Model Content

[0005] The purpose of the utility model is to provide a contact arm structure of an isolating switch to solve the problems raised in the above background technology.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A contact arm structure of an isolating switch comprises a movable contact arm, a first contact and a second contact, wherein the first contact and the second contact are respectively arranged at two ends of the movable contact arm, the movable contact arm comprises two side panels, a limiting member is arranged between the two side panels, the limiting member comprises a first limiting semicircle and a second limiting semicircle, two positioning card shafts are fixedly connected to the first limiting semicircle, and two positioning card holes used in conjunction with the positioning card shafts are provided on the second limiting semicircle.

[0008] A fixing screw is arranged between the two side panels, the fixing screw passes through the center of the first limiting semicircle and the second limiting semicircle and extends to the outside of the side panel, semicircular grooves are opened on both sides of the first limiting semicircle and the second limiting semicircle, the two semicircular grooves form a circular groove, and a side positioning ring is fixedly connected to the outer surface of the fixing screw and located in the circular groove.

[0009] Preferably, the inner walls of the semicircular grooves of the first limiting semicircle and the second limiting semicircle are provided with trapezoidal grooves, and the outer surface of the side positioning ring is fixedly connected with a trapezoidal positioning protrusion used in conjunction with the trapezoidal grooves.

[0010] Preferably, through holes are provided on both side panels, positioning holes are provided on both sides of the first limiting semicircle and the second limiting semicircle, and the apertures of the through holes and the positioning holes are consistent.

[0011] Preferably, a collar is provided on the side of the two side panels away from each other, the collar is sleeved on the fixing screw, a positioning rod is fixedly connected to the collar, and one end of the positioning rod passes through the through hole and extends to the inside of the positioning hole.

[0012] Preferably, a locking nut is provided on a side of the collar away from the side panel, and the locking nut is threadedly connected to the fixing screw.

[0013] Preferably, one end of the first contact is hinged between two side panels, an extrusion plate is provided on one side of the side panel, an adjusting screw is provided on the end of the side panel away from the first contact, both ends of the adjusting screw respectively pass through the two side panels and the extrusion plate, and are threadedly connected with an adjusting nut.

[0014] Beneficial effects of the utility model:

[0015] The utility model provides a detachable first limiting semicircle and a second limiting semicircle as limiting members between the two side panels, so that after adjusting the distance between the two side panels to adapt to the second contact, the first limiting semicircle and the second limiting semicircle of different thicknesses can be replaced, thereby achieving a more sufficient limiting effect and avoiding looseness between the two side panels. At the same time, when replacing the first limiting semicircle and the second limiting semicircle as limiting members, there is no need to completely separate the locking nut and the fixing screw, so the operation is simple and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This utility model Figure 1 Schematic diagram of the structure at the top of the middle side panel;

[0019] Figure 3 This utility model Figure 2 A schematic diagram of the structure of the first limiting semicircle;

[0020] Figure 4 This utility model Figure 2 Schematic diagram of the structure of the rear view of the first contact.

[0021] The reference numerals in the figures are as follows:

[0022] 1. Side panel, 2. First contact, 3. Second contact, 4. First limiting semicircle, 5. Second limiting semicircle, 6. Positioning card shaft, 7. Positioning card hole, 8. Fixing screw, 9. Circular groove, 10. Side positioning ring, 11. Trapezoidal groove, 12. Trapezoidal positioning protrusion, 13. Through hole, 14. Positioning hole, 15. Ring, 16. Positioning card rod, 17. Locking nut, 18. Extrusion plate, 19. Adjusting screw, 20. Adjusting nut. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] A contact arm structure of an isolating switch comprises a moving contact arm, a first contact 2 and a second contact 3, wherein the first contact 2 and the second contact 3 are respectively arranged at two ends of the moving contact arm, the moving contact arm comprises two side panels 1, a limiting member is arranged between the two side panels 1, the limiting member comprises a first limiting semicircle 4 and a second limiting semicircle 5, two positioning card shafts 6 are fixedly connected to the first limiting semicircle 4, and two positioning card holes 7 used in conjunction with the positioning card shaft 6 are provided on the second limiting semicircle 5.

[0025] A fixing screw 8 is arranged between the two side panels 1, and the fixing screw 8 passes through the center of the first limiting semicircle 4 and the second limiting semicircle 5 and extends to the outside of the side panel 1. Semicircular grooves are opened on both sides of the first limiting semicircle 4 and the second limiting semicircle 5. The two semicircular grooves form a circular groove 9, and a side positioning ring 10 is fixedly connected to the outer surface of the fixing screw 8 and located in the circular groove 9.

[0026] like Figure 1 and Figure 2 The first contact 2, the second contact 3 and the side panel 1 are all conductive parts, the first limiting semicircle 4 and the second limiting semicircle 5 are insulating parts, and there is an opening on the side panel 1 to facilitate the passage of the fixing screw 8. There is an arc-shaped groove on the side where the first limiting semicircle 4 and the second limiting semicircle 5 are close to each other, so that the fixing screw 8 passes through the center of the first limiting semicircle 4 and the second limiting semicircle 5, and two side positioning rings 10 position the first limiting semicircle 4 and the second limiting semicircle 5 from both sides.

[0027] The inner walls of the semicircular grooves of the first limiting semicircle 4 and the second limiting semicircle 5 are provided with a trapezoidal groove 11 , and the outer surface of the side positioning ring 10 is fixedly connected with a trapezoidal positioning protrusion 12 used in conjunction with the trapezoidal groove 11 .

[0028] like Figure 2 and Figure 4 The trapezoidal positioning protrusion 12 is stuck in the trapezoidal groove 11, which can prevent the first limiting semicircle 4 and the second limiting semicircle 5 from rotating on the fixing screw 8, and has a positioning effect on the first limiting semicircle 4 and the second limiting semicircle 5.

[0029] A through hole 13 is formed on each of the two side panels 1 , and positioning holes 14 are formed on both sides of the first limiting semicircle 4 and the second limiting semicircle 5 . The through hole 13 and the positioning hole 14 have the same aperture.

[0030] like Figure 1 , Figure 2 and Figure 3 , the through hole 13 and the positioning hole 14 are aligned in the same horizontal direction.

[0031] A collar 15 is provided on the side away from each other of the two side panels 1 . The collar 15 is sleeved on the fixing screw 8 . A positioning rod 16 is fixedly connected to the collar 15 . One end of the positioning rod 16 passes through the through hole 13 and extends to the inside of the positioning hole 14 .

[0032] like Figure 1 , Figure 2 and Figure 3 When the collar 15 is sleeved onto the fixing screw 8 and one end of the positioning clamp rod 16 is inserted into the positioning hole 14 , rotation between the first limiting semicircle 4 , the second limiting semicircle 5 and the side panel 1 can be prevented.

[0033] A locking nut 17 is disposed on a side of the collar 15 away from the side panel 1 , and the locking nut 17 is threadedly connected to the fixing screw 8 .

[0034] like Figure 1 , Figure 2 and Figure 3 When the locking nut 17 is threadedly connected to the fixing screw 8 , the collar 15 can be pressed onto the side panel 1 , thereby achieving a positioning effect on the collar 15 and the positioning clamp rod 16 .

[0035] One end of the first contact 2 is hinged between the two side panels 1, an extrusion plate 18 is provided on one side of the side panel 1, and an adjusting screw 19 is provided at one end of the side panel 1 away from the first contact 2, and both ends of the adjusting screw 19 respectively pass through the two side panels 1 and the extrusion plate 18, and are threadedly connected with an adjusting nut 20.

[0036] like Figure 1 and Figure 4The first contact 2 is always connected to the side panel 1, and the top of the second contact 3 is a curved surface, so that the second contact 3 is easier to be inserted between the two side panels 1. By rotating the adjusting nut 20 to make the adjusting nut 20 move in different directions, the pressure on the extrusion plate 18 and the side panel 1 can be adjusted, and it can adapt to the use of second contacts 3 of different widths. The extrusion plate 18 and the side panel 1 have more contact area, so that when the adjusting nut 20 presses the extrusion plate 18, it can apply more uniform pressure to the side panel 1.

[0037] The working principle of the contact arm structure of an isolating switch provided by the utility model is as follows:

[0038] By rotating the adjusting nut 20 in different directions, the distance between the two side panels 1 can be adjusted to adapt to the connection between the second contact 3 and the moving contact arm of different widths. After adjusting the distance between the two side panels 1, the locking nut 17 can be rotated counterclockwise to pull the collar 15 away from the side panels 1, so as to drive the positioning rod 16 to separate from the positioning hole 14.

[0039] At this time, the first limiting semicircle 4 and the second limiting semicircle 5 can be pulled away from each other, and the first limiting semicircle 4 and the second limiting semicircle 5 can be removed from between the two side panels 1. Then, the first limiting semicircle 4 and the second limiting semicircle 5 of different thicknesses can be replaced, and the first limiting semicircle 4 and the second limiting semicircle 5 are sleeved on the fixing screw 8, so that the positioning card shaft 6 is inserted into the positioning card hole 7, and the trapezoidal positioning protrusion 12 is relatively inserted into the trapezoidal groove 11;

[0040] Then, the positioning rod 16 is inserted into the positioning hole 14 , and the locking nut 17 is rotated clockwise to position the collar 15 and the positioning rod 16 .

[0041] Compared with the related art, the contact arm structure of the isolating switch provided by the utility model has the following advantages:

[0042] Beneficial effects:

[0043] The utility model sets a detachable first limiting semicircle 4 and a second limiting semicircle 5 as limiting members between the two side panels 1, so that after adjusting the distance between the two side panels 1 to adapt to the second contact 3, the first limiting semicircle 4 and the second limiting semicircle 5 of different thicknesses can be replaced, thereby achieving a more sufficient limiting effect and avoiding looseness between the two side panels 1. At the same time, when replacing the first limiting semicircle 4 and the second limiting semicircle 5 as limiting members, there is no need to completely separate the locking nut 17 and the fixing screw 8, so the operation is simple and convenient to use.

[0044] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A contact arm structure of an isolating switch, comprising a movable contact arm, a first contact (2) and a second contact (3), wherein the first contact (2) and the second contact (3) are respectively arranged at two ends of the movable contact arm, characterized in that: The movable contact arm comprises two side panels (1), a limiting member is arranged between the two side panels (1), the limiting member comprises a first limiting semicircle (4) and a second limiting semicircle (5), two positioning clamping shafts (6) are fixedly connected to the first limiting semicircle (4), and two positioning clamping holes (7) for use with the positioning clamping shafts (6) are provided on the second limiting semicircle (5); A fixing screw (8) is arranged between the two side panels (1), the fixing screw (8) passes through the center of the first limiting semicircle (4) and the second limiting semicircle (5) and extends to the outside of the side panel (1), semicircular grooves are opened on both sides of the first limiting semicircle (4) and the second limiting semicircle (5), and the two semicircular grooves form a circular groove (9), and a side positioning ring (10) is fixedly connected to the outer surface of the fixing screw (8) and located in the circular groove (9).

2. The contact arm structure of the isolating switch according to claim 1, characterized in that: The inner walls of the semicircular grooves of the first limiting semicircle (4) and the second limiting semicircle (5) are provided with a trapezoidal groove (11), and the outer surface of the side positioning ring (10) is fixedly connected with a trapezoidal positioning protrusion (12) used in conjunction with the trapezoidal groove (11).

3. The contact arm structure of the isolating switch according to claim 1, characterized in that: Through holes (13) are provided on both side panels (1), and positioning holes (14) are provided on both sides of the first limiting semicircle (4) and the second limiting semicircle (5), and the apertures of the through holes (13) and the positioning holes (14) are consistent.

4. A contact arm structure of an isolating switch according to claim 3, characterized in that: A collar (15) is provided on the side of the two side panels (1) that is away from each other. The collar (15) is sleeved on the fixing screw (8). A positioning rod (16) is fixedly connected to the collar (15). One end of the positioning rod (16) passes through the through hole (13) and extends into the interior of the positioning hole (14).

5. The contact arm structure of the isolating switch according to claim 4, characterized in that: A locking nut (17) is provided on the side of the collar (15) away from the side panel (1), and the locking nut (17) is threadedly connected to the fixing screw (8).

6. A contact arm structure of an isolating switch according to claim 5, characterized in that: One end of the first contact (2) is hinged between the two side panels (1), an extrusion plate (18) is provided on one side of the side panel (1), an adjustment screw (19) is provided on the end of the side panel (1) away from the first contact (2), and both ends of the adjustment screw (19) respectively penetrate the two side panels (1) and the extrusion plate (18), and are threadedly connected with an adjustment nut (20).

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