Circuit breaker moving contact limiting module

Abstract

The utility model relates to the technical field of moving contacts of circuit breakers, in particular to a moving contact limiting module of a circuit breaker, which comprises a fixed shaft, a movable shaft and moving contact wafers in a linear array, two ends of the fixed shaft and two ends of the movable shaft penetrate through the moving contact wafers and extend out of the moving contact wafers. The two ends of the fixed shaft and the two ends of the movable shaft are provided with threads, the two ends of the fixed shaft and the two ends of the movable shaft are in threaded connection with threaded pipes, the sides, close to the moving contact wafer, of the threaded pipes are fixedly connected with pressing pieces, the two sides of the moving contact wafer are provided with insulating gaskets, and the pressing pieces are used for pressing the moving contact wafer and the insulating gaskets together. According to the utility model, the threaded pipe is in threaded connection with the two ends of the fixed shaft and the movable shaft, and at the moment, the pressing piece presses the moving contact wafer from the two sides, and the moving contact wafer and the insulating spacer are pressed and limited together, so that the moving contact wafer and the insulating spacer which are pressed together do not elastically loosen.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker moving contacts, in particular to a circuit breaker moving contact limiting module. Background Art

[0002] The moving contact and the stationary contact of the circuit breaker together constitute the main contact. These main contacts are located in the main circuit and are mainly responsible for the transmission and control of electrical energy. During the operation of the circuit breaker, the contact between the moving contact and the stationary contact is directly related to the on and off of the circuit.

[0003] In the prior art, a circuit breaker moving contact assembly proposed in patent application number "CN202223357503.3" includes a plurality of moving contact pieces distributed in an array, and both ends of the moving contact pieces are provided with insulating gaskets with the same structure as the moving contact pieces. A fixed shaft is provided between the moving contact pieces, and both ends of the fixed shaft are connected to the side plates on both sides, and the moving contact pieces and the insulating gaskets are rotatably connected to the fixed shaft.

[0004] However, in the above patent application, the moving contact piece and the insulating gasket are limited by squeezing them through a limit spring. This limiting method is prone to elastic vibration due to equipment vibration, resulting in loosening of the limit of the moving contact piece and the insulating gasket. Utility Model Content

[0005] The purpose of the utility model is to provide a circuit breaker moving contact limit module 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 circuit breaker moving contact limit module comprises a fixed shaft, a movable shaft and moving contact pieces in a linear array, both ends of the fixed shaft and the movable shaft penetrate the moving contact piece and extend to the outside of the moving contact piece, both ends of the fixed shaft and the movable shaft are provided with threads, both ends of the fixed shaft and the movable shaft are threadedly connected with threaded pipes, a clamping piece is fixedly connected to one side of the threaded pipe close to the moving contact piece, insulating gaskets are provided on both sides of the moving contact piece, and the clamping piece is used to press the moving contact piece and the insulating gasket together.

[0008] A fixing plate is arranged on one side of the moving contact piece, and a plurality of spring sheets are fixedly connected to one side of the fixing plate. The spring sheets are used to press the insulating gasket onto the moving contact piece.

[0009] Preferably, a moving contact point is provided at one end of each of the plurality of moving contact pieces, a protruding block is fixedly connected to the moving contact piece located in the middle, a fixing bolt is provided on the fixing plate, the fixing bolt passes through the fixing plate and is threadedly connected to the protruding block, and is used to install and fix the fixing plate to the protruding block.

[0010] Preferably, the fixed shaft is sleeved with a first connecting block in a linear array, the movable shaft is sleeved with a second connecting block in a linear array, the first connecting block and the second connecting block are staggered with the moving contact piece, and a tension spring is fixedly connected between the first connecting block and the second connecting block.

[0011] Preferably, the moving contact piece includes a fixed piece and a movable piece, the movable piece is provided with a sliding groove, and the bottom of the fixed piece is fixedly connected with a sliding piece in the sliding groove.

[0012] Preferably, vertical grooves are provided on both sides of the movable sheet, and limiting protrusions are fixedly connected to both sides of the sliding sheet, and the limiting protrusions are slidably connected to the vertical grooves.

[0013] Preferably, a limiting protrusion is fixedly connected to one side of the movable plate, a threaded sleeve is fixedly connected to the middle fixed plate, a threaded shaft is threadedly connected to the threaded sleeve, a positioning card is rotatably connected to the bottom of the threaded shaft, and a limiting slot is provided on the positioning card for use with the limiting protrusion.

[0014] Beneficial effects of the utility model:

[0015] The utility model is threadedly connected to both ends of a fixed shaft and a movable shaft through a threaded pipe, and at this time, a clamping member clamps the moving contact piece from both sides, and clamps the moving contact piece and the insulating gasket together to limit their positions, so that the moving contact piece and the insulating gasket that are clamped together will not be elastically loosened, and at the same time, a fixed plate is fixed to the middle moving contact piece, and the insulating gaskets on both sides of each moving contact piece are clamped onto the corresponding moving contact piece by means of a spring sheet, thereby further avoiding the possibility of loosening of the moving contact piece and the insulating gasket. 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 Rear view of the moving contact piece;

[0019] Figure 3 This utility model Figure 2 Schematic diagram of the connection between the fixed plate and the spring sheet;

[0020] Figure 4 This utility model Figure 2 A schematic diagram of the structure of a single moving contact piece;

[0021] Figure 5 This utility model Figure 3 Schematic diagram of the structure of the positioning card.

[0022] The reference numerals in the figures are as follows:

[0023] 1. Moving contact piece, 101. Fixed piece, 102. Movable piece, 2. Fixed shaft, 3. Movable shaft, 4. Threaded tube, 5. Pressing piece, 6. Insulating gasket, 7. Fixed plate, 8. Spring sheet, 9. Moving contact, 10. Protruding block, 11. Fixing bolt, 12. First connecting block, 13. Second connecting block, 14. Tension spring, 15. Sliding groove, 16. Sliding piece, 17. Vertical groove, 18. Limiting protrusion, 19. Limiting protrusion, 20. Threaded sleeve, 21. Threaded shaft, 22. Positioning card, 23. Limiting card groove. DETAILED DESCRIPTION

[0024] 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.

[0025] A circuit breaker moving contact limit module comprises a fixed shaft 2, a movable shaft 3 and moving contact pieces 1 in a linear array, both ends of the fixed shaft 2 and the movable shaft 3 penetrate the moving contact piece 1 and extend to the outside of the moving contact piece 1, both ends of the fixed shaft 2 and the movable shaft 3 are provided with threads, both ends of the fixed shaft 2 and the movable shaft 3 are threadedly connected with a threaded tube 4, a clamping piece 5 is fixedly connected to one side of the threaded tube 4 close to the moving contact piece 1, insulating gaskets 6 are provided on both sides of the moving contact piece 1, and the clamping piece 5 is used to press the moving contact piece 1 and the insulating gasket 6 together.

[0026] A fixing plate 7 is disposed on one side of the moving contact piece 1 , and a plurality of spring pieces 8 are fixedly connected to one side of the fixing plate 7 . The spring pieces 8 are used to press the insulating gasket 6 onto the moving contact piece 1 .

[0027] like Figure 1 and Figure 4There is an opening on the moving contact piece 1, which is convenient for the fixed shaft 2 and the movable shaft 3 to pass through the moving contact piece. An opening is also provided at the same position as the opening of the insulating gasket 6 and the moving contact piece 1, which is convenient for the fixed shaft 2 and the movable shaft 3 to pass through the insulating gasket 6. Each insulating gasket 6 is provided with a spring piece 8 on the side away from the moving contact piece 1. The spring piece 8 is used to apply pressure to the insulating gasket 6 in the direction of the moving contact piece 1. The moving contact piece 1 is a component of the circuit breaker in the prior art and can be used to control the opening or closing of the circuit breaker.

[0028] A moving contact point 9 is provided at one end of each of the moving contact pieces 1, a raised block 10 is fixedly connected to the moving contact piece 1 located in the middle, a fixing bolt 11 is provided on the fixing plate 7, the fixing bolt 11 passes through the fixing plate 7 and is threadedly connected to the raised block 10, and is used to install and fix the fixing plate 7 to the raised block 10.

[0029] like Figure 2 and Figure 3 A concave notch is formed on the raised block 10, and the fixing plate 7 is inserted into the concave notch thereon. At this time, the fixing bolt 11 passes through the fixing plate 7 to stably fix the fixing plate 7 to the raised block 10. The raised block 10 has a bearing effect on the fixing plate 7. The fixing bolt 11 fixes the fixing plate 7 to the raised block 10, thereby realizing the connection between the fixing plate 7 and one of the moving contact pieces 1.

[0030] The fixed shaft 2 is sleeved with a first connecting block 12 in a linear array, and the movable shaft 3 is sleeved with a second connecting block 13 in a linear array. The first connecting block 12 and the second connecting block 13 are staggered with the moving contact piece 1, and a tension spring 14 is fixedly connected between the first connecting block 12 and the second connecting block 13.

[0031] like Figure 1 The tension spring 14 is in a stretched state, which plays a role in tightening the movable shaft 3, and the first connecting block 12 has an opening to facilitate the passage of the fixed shaft 2, and the second connecting block 13 has an opening to facilitate the passage of the movable shaft 3.

[0032] The movable contact piece 1 comprises a fixed piece 101 and a movable piece 102 . A sliding groove 15 is formed on the movable piece 102 . A sliding piece 16 is fixedly connected to the bottom of the fixed piece 101 and located in the sliding groove 15 .

[0033] like Figure 2 and Figure 4 The sliding piece 16 is located in the sliding groove 15, so that the fixed piece 101 can move towards the movable piece 102, driving the sliding piece 16 to move in the sliding groove 15, so that the movable contact piece 1 can be extended and retracted to adapt to different sizes.

[0034] The movable sheet 102 is provided with vertical grooves 17 on both sides, and the sliding sheet 16 is fixedly connected with limiting protrusions 18 on both sides. The limiting protrusions 18 are slidably connected to the vertical grooves 17 .

[0035] like Figure 2 and Figure 4 The vertical groove 17 and the limiting protrusion 18 are slidably connected, so that the sliding piece 16 cannot be separated from the sliding groove 15, which plays a limiting role, ensuring that the fixed piece 101 and the movable piece 102 cannot be completely separated when the moving contact piece 1 is extended and retracted.

[0036] A limiting protrusion 19 is fixedly connected to one side of the movable sheet 102, a threaded sleeve 20 is fixedly connected to the middle fixed sheet 101, a threaded shaft 21 is threadedly connected to the threaded sleeve 20, a positioning fixture 22 is rotatably connected to the bottom of the threaded shaft 21, and a limiting slot 23 used in conjunction with the limiting protrusion 19 is provided on the positioning fixture 22.

[0037] like Figure 2 , Figure 4 and Figure 5 By rotating the threaded shaft 21, the positioning card 22 can be driven to move up and down, the positioning card 22 can drive the limiting protrusion 19 to move up and down, and the limiting protrusion 19 can drive the movable piece 102 to move up and down, so as to realize the extension and retraction of the moving contact piece 1, and ensure that the moving contact piece 1 will not rebound after extension and retraction. At the same time, when installing the moving contact piece 1, the limiting protrusion 19 can be correspondingly inserted into the limiting card groove 23 from the horizontal direction, which is convenient for the installation of the moving contact piece 1.

[0038] Compared with the related art, the circuit breaker moving contact limit module provided by the utility model has the following beneficial effects:

[0039] The utility model is threadedly connected to the two ends of the fixed shaft 2 and the movable shaft 3 through the threaded tube 4. At this time, the clamping member 5 clamps the moving contact piece 1 from both sides, and clamps the moving contact piece 1 and the insulating gasket 6 together to limit their positions. At the same time, the moving contact piece 1 and the insulating gasket 6 that are clamped together will not be elastically loose. At the same time, the fixing plate 7 is fixed to the middle moving contact piece 1, and the insulating gaskets 5 on both sides of each moving contact piece 1 are pressed onto the corresponding moving contact piece 1 by using the spring sheet 8, so as to further avoid the possibility of loosening of the moving contact piece 1 and the insulating gasket 6.

[0040] 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 circuit breaker moving contact limit module, comprising a fixed shaft (2), a movable shaft (3) and moving contact pieces (1) in a linear array, characterized in that: Both ends of the fixed shaft (2) and the movable shaft (3) penetrate the movable contact piece (1) and extend to the outside of the movable contact piece (1); both ends of the fixed shaft (2) and the movable shaft (3) are provided with threads; both ends of the fixed shaft (2) and the movable shaft (3) are threadedly connected with threaded tubes (4); a clamping piece (5) is fixedly connected to one side of the threaded tube (4) close to the movable contact piece (1); insulating gaskets (6) are provided on both sides of the movable contact piece (1); the clamping piece (5) is used to press the movable contact piece (1) and the insulating gasket (6) together; A fixing plate (7) is provided on one side of the moving contact piece (1), and a plurality of spring pieces (8) are fixedly connected to one side of the fixing plate (7). The spring pieces (8) are used to press the insulating gasket (6) onto the moving contact piece (1).

2. A circuit breaker moving contact limit module according to claim 1, characterized in that: A plurality of movable contact pieces (1) are each provided with a movable contact point (9) at one end, a protruding block (10) is fixedly connected to the movable contact piece (1) located in the middle, a fixing bolt (11) is provided on the fixing plate (7), and the fixing bolt (11) passes through the fixing plate (7) and is threadedly connected to the protruding block (10) for mounting and fixing the fixing plate (7) to the protruding block (10).

3. A circuit breaker moving contact limit module according to claim 1, characterized in that: The fixed shaft (2) is sleeved with a first connection block (12) in a linear array, and the movable shaft (3) is sleeved with a second connection block (13) in a linear array. The first connection block (12) and the second connection block (13) are arranged alternately with the movable contact piece (1), and a tension spring (14) is fixedly connected between the first connection block (12) and the second connection block (13).

4. A circuit breaker moving contact limit module according to claim 1, characterized in that: The movable contact piece (1) comprises a fixed piece (101) and a movable piece (102); a sliding groove (15) is provided on the movable piece (102); a sliding piece (16) is fixedly connected to the bottom of the fixed piece (101) and located in the sliding groove (15).

5. A circuit breaker moving contact limit module according to claim 4, characterized in that: Vertical grooves (17) are provided on both sides of the movable sheet (102), and limiting protrusions (18) are fixedly connected to both sides of the sliding sheet (16), and the limiting protrusions (18) and the vertical grooves (17) are slidably connected.

6. A circuit breaker moving contact limit module according to claim 5, characterized in that: A limiting protrusion (19) is fixedly connected to one side of the movable sheet (102), a threaded sleeve (20) is fixedly connected to the fixed sheet (101) located in the middle, a threaded shaft (21) is threadedly connected to the threaded sleeve (20), a positioning clamp (22) is rotatably connected to the bottom of the threaded shaft (21), and a limiting clamping groove (23) used in conjunction with the limiting protrusion (19) is provided on the positioning clamp (22).

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