Moving contact clamping plate assembly

Abstract

The utility model relates to a moving contact clamping plate assembly. The technical problem to be solved by the utility model is to provide a moving contact clamping plate assembly. According to the technical scheme, the moving contact comprises a moving contact clamping plate, a moving contact assembly, a clamping plate locking piece, a torsion spring and a connecting shaft, the moving contact clamping plate comprises a clamping plate mounting part, the clamping plate mounting part is provided with a clamping plate fixing hole formed in a circuit breaker shell, and the left side and the right side of the clamping plate mounting part are bent to form clamping plate connecting parts. The upper end of the clamping plate connecting part is bent to form clamping plate clamping parts perpendicular to the clamping plate mounting part, and a clamping plate clamping opening used for placing the moving contact assembly is formed between the two clamping plate clamping parts. Compared with the prior art, the moving contact clamping plate has the advantages that the moving contact clamping plate can carry out limited control on the swing range of the moving contact assembly through the action limiting structure of the moving contact plate limiting column and the clamping plate kidney-shaped limiting groove, the moving contact is effectively prevented from exceeding the designed swing range due to inertia or electric repulsive force, and the contact pressure uniformity of the contact is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of molded case circuit breaker, specifically relates to a moving contact clamp plate assembly. BACKGROUND

[0002] The moving contact clamp plate assembly is a key structural member for fixing and supporting the moving contact assembly in the molded case circuit breaker, and its core role is to guarantee the stability, contact reliability and operation safety of the contact system. The traditional moving contact clamp plate adopts a U-shaped structure, which does not have safety limiting for the stroke of the moving contact assembly swing, and the moving contact is easy to exceed the designed swing range due to inertia or electric repulsive force in the process of opening and closing, resulting in uneven contact pressure of the contact, poor contact reliability and reduced opening and closing performance of the circuit breaker. The structure design of the traditional U-shaped clamp plate is relatively simple, and the opening size of the clamp plate clamp is not effectively controlled, and the clamp plate clamp is easy to deviate or deform due to external factors (such as vibration or impact), so that the movement of the moving contact assembly is unstable, further aggravating the problem of unreliable moving contact. SUMMARY

[0003] To solve the above problems, the technical problem to be solved by the utility model is to provide a moving contact clamp plate assembly.

[0004] The utility model discloses a moving contact clamp plate assembly adopts the technical scheme: its characterized in that including moving contact clamp plate, moving contact assembly, clamp plate locking piece, torsional spring and connecting shaft, the moving contact clamp plate includes clamp plate installation part, be equipped with the clamp plate fixed hole on the clamp plate installation part and install on the circuit breaker shell, the left and right side of the clamp plate installation part is bent and forms the clamp plate connecting part, the upper end of the clamp plate connecting part is bent and forms the clamp plate clamping part that is perpendicular to the arrangement of the clamp plate installation part, the two clamp plate clamping parts form the clamp plate clamp for the moving contact assembly inserts between, be equipped with the clamp plate connecting hole on the clamp plate clamping part, the inner side of the clamp plate clamping part is equipped with the clamp plate waist shape limit slot, the upper end of the clamp plate clamping part is equipped with the clamping part limit protruding;

[0005] The moving contact assembly includes a moving contact plate, a moving contact point, and a moving contact plate limiting column riveted on the moving contact plate, the moving contact plate is provided with a moving contact plate connecting hole opposite to the clamp plate connecting hole, the moving contact plate limiting column moves in the clamp plate waist shape limit slot, and the connecting shaft is arranged in the clamp plate connecting hole and the moving contact plate connecting hole.

[0006] The clamp plate locking piece includes a locking piece lock plate, and the locking piece lock plate is provided with a locking piece interlocking port clamped on the clamping part limit protruding.

[0007] The locking piece lock plate is vertically bent at both ends to form a locking piece wrapping part which is attached to the outside of the clamping part of the clamping plate, and the locking piece wrapping part is provided with a locking piece connecting hole which is opposite to the clamping plate connecting hole.

[0008] The end of the clamping plate mounting part is provided with a circular arc positioning protrusion.

[0009] The other end of the clamping plate mounting part is vertically bent to form a clamping plate end blocking part and a clamping plate insertion part which is parallel to the clamping plate mounting part and is used for being inserted into the circuit breaker shell.

[0010] The movable contact plate is provided with a movable contact plate clamping block, the torsion spring comprises a torsion spring first spiral part and a torsion spring second spiral part, the inner leading end of the torsion spring first spiral part and the inner leading end of the torsion spring second spiral part are connected together to form a torsion spring driving part, the outer end of the torsion spring first spiral part and the outer end of the torsion spring second spiral part are both provided with a torsion spring limiting foot which is reversely arranged with the torsion spring driving part, the torsion spring first spiral part and the torsion spring second spiral part are both provided with a torsion spring through hole which has a common shaft and is sleeved on the connecting shaft, the outer end of the torsion spring first spiral part and the outer end of the torsion spring second spiral part are placed outside the locking piece wrapping part and the torsion spring driving part is clamped on the movable contact plate clamping block.

[0011] The movable contact plate limiting column and the clamping plate waist-shaped limiting groove of the movable contact head clamping plate assembly have an action limiting structure, so that the movable contact head clamping plate can limit the swing range of the movable contact head assembly, effectively prevents the movable contact head from exceeding the designed swing range due to inertia or electric repulsive force, ensures uniform contact pressure, improves the stability of the contact system, and is safer; the clamping plate locking piece can limit the position of the two clamping parts of the clamping plate, so that the size of the clamping port of the clamping plate remains unchanged, prevents the clamping port of the clamping plate from being deviated or deformed due to external vibration or impact, and ensures stable operation of the movable contact head assembly. BRIEF DESCRIPTION OF DRAWINGS

[0012] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0013] Figure 1 It is the structure schematic diagram of the movable contact head clamping plate assembly of the utility model;

[0014] Figure 2 It is the front structure schematic diagram of the movable contact head clamping plate of the utility model;

[0015] Figure 3 It is the structure schematic diagram of the movable contact head assembly of the utility model;

[0016] Figure 4 It is the structure schematic diagram of the clamping plate locking piece of the utility model;

[0017] Figure 5 Figure 2 is a back structure schematic view of the movable contact clamp plate of the utility model;

[0018] Figure 6 Figure 4 is a structure schematic view of the torsion spring of the utility model. DETAILED DESCRIPTION

[0019] As Figures 1-6 shown, the movable contact clamp plate assembly of the utility model relates to, including movable contact clamp plate 1, movable contact assembly 2, clamp locking piece 3, torsion spring 4 and connecting shaft 5, movable contact clamp plate 1 includes clamp mounting portion 7, clamp mounting portion 7 is equipped with the clamp fixed hole 24 of installation on circuit breaker shell, clamp mounting portion 7 left and right side bending forms clamp connecting portion 8, the upper end of clamp connecting portion 8 bending forms and the clamp mounting portion 7 vertically arranged clamp clamping portion 9, two clamp clamping portion 9 between form is used for the clamp mouth 10 of inserting movable contact assembly 2, clamp clamping portion 9 is equipped with clamp connecting hole 11, the inner side of clamp clamping portion 9 is equipped with clamp waist shape limit slot 12, the upper end of clamp clamping portion 9 is equipped with clamping portion limit protrusion 13;Movable contact assembly 2 includes movable contact plate 14, movable contact point 15 and riveting in movable contact plate 14 on movable contact plate limit column 16, movable contact plate 14 is equipped with and movable contact plate connecting hole 17 is opposite to the clamp connecting hole 11, movable contact plate limit column 16 in the action of clamp waist shape limit slot 12, connecting shaft 5 is worn in clamp connecting hole 11 and movable contact plate connecting hole 17 on;Clamp locking piece 3 includes locking piece lock plate 20, locking piece lock plate 20 is equipped with and is connected in the locking piece interlocking mouth 21 of clamp clamping portion limit protrusion 13, the action limit structure of movable contact plate limit column 16 and clamp waist shape limit slot 12, so that movable contact clamp plate 1 can control the swing range of movable contact assembly 2 limitedly, effectively prevent movable contact from inertia or electric repulsion and exceed the design swing range, ensure that the contact pressure is uniform, improve the stability of contact system, and the safety is higher;Clamp locking piece 3 can limit the position of two clamp clamping portion 9, so that the opening size of clamp mouth 10 remains unchanged, prevent the shift or deformation of clamp mouth due to external vibration or impact, ensure the stable action of movable contact assembly 2.

[0020] The both ends of locking piece lock plate 20 are vertically bent to form locking piece wrapping portion 22 attached to the outer side of clamp clamping portion 9, locking piece wrapping portion 22 is equipped with locking piece connecting hole 23 opposite to clamp connecting hole 11, connecting shaft 5 connects locking piece connecting hole 23, clamp connecting hole 11 and movable contact plate connecting hole 17 together, so that clamp locking piece 3 and movable contact clamp plate 1 form a whole, and the structure is more firm and reliable.

[0021] The clamp mounting part 7 has an arc-shaped positioning protrusion 27 at its end, which makes positioning accurate and installation more convenient.

[0022] The other end of the clamp mounting part 7 is vertically bent to form a clamp end stop 25 and a clamp insertion part 26 that is parallel to the clamp mounting part 7 and is used to insert into the circuit breaker housing. This makes the connection between the moving contact clamp 1 and the circuit breaker housing more limited, ensuring the reliability and stability of the connection and further reducing the loosening of the moving contact clamp 1.

[0023] The movable contact plate 14 is provided with a movable contact plate locking block 30. The torsion spring 4 includes a first torsion spring helical part 34 and a second torsion spring helical part 35. The inner lead-out ends of the first torsion spring helical part 34 and the inner lead-out ends of the second torsion spring helical part 35 are connected together to form a torsion spring driving part 39. The outer ends of the first torsion spring helical part 34 and the second torsion spring helical part 35 are both provided with torsion spring limiting feet 38 that are arranged in the opposite direction to the torsion spring driving part 39. The first torsion spring helical part 34 and the second torsion spring helical part 35 are both provided with torsion spring through holes 36 that are axially connected and sleeved on the connecting shaft 5. The outer ends of the first torsion spring helical part 34 and the second torsion spring helical part 35 are placed outside the locking member wrapping part 22, and the torsion spring driving part 39 is locked onto the movable contact plate locking block 30. The torsion spring limiting feet 38 and the torsion spring driving part 39 are arranged in the opposite direction, which makes the torsion spring bear greater force and the triangular structure more stable and less prone to damage, making the operation more reliable and the service life longer.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model are included within the protection scope of the present utility model.

Claims

1. A moving contact clamp assembly, characterized in that: The circuit breaker includes a moving contact clamp (1), a moving contact assembly (2), a clamp locking member (3), a torsion spring (4), and a connecting shaft (5). The moving contact clamp (1) includes a clamp mounting part (7), which has a clamp fixing hole (24) on the circuit breaker housing. The clamp mounting part (7) is bent on the left and right sides to form a clamp connecting part (8). The upper end of the clamp connecting part (8) is bent to form a clamp holding part (9) perpendicular to the clamp mounting part (7). A clamp clamping mouth (10) for inserting the moving contact assembly (2) is formed between the two clamp holding parts (9). The clamp holding part (9) has a clamp connecting hole (11), a clamp waist-shaped limiting groove (12) is provided on the inner side of the clamp holding part (9), and a clamp holding part limiting protrusion (13) is provided on the upper end of the clamp holding part (9). The moving contact assembly (2) includes a moving contact plate (14), a moving contact (15), and a moving contact plate limiting post (16) riveted to the moving contact plate (14). The moving contact plate (14) is provided with a moving contact plate connecting hole (17) that is opposite to the clamping plate connecting hole (11). The moving contact plate limiting post (16) moves in the clamping plate waist-shaped limiting groove (12). The connecting shaft (5) passes through the clamping plate connecting hole (11) and the moving contact plate connecting hole (17). The clamping plate locking component (3) includes a locking plate (20), and the locking plate (20) is provided with a locking interlocking port (21) that engages with the limiting protrusion (13) of the clamping part.

2. The moving contact clamp assembly according to claim 1, characterized in that: The locking plate (20) is bent vertically at both ends to form a locking part wrapping part (22) that fits against the outside of the clamping part (9). The locking part wrapping part (22) is provided with a locking part connecting hole (23) that is opposite to the clamping part connecting hole (11). The connecting shaft (5) connects the locking part connecting hole (23), the clamping part connecting hole (11) and the moving contact plate connecting hole (17) together.

3. The moving contact clamp assembly according to claim 1, characterized in that: The end of the clamp mounting part (7) is provided with an arc-shaped positioning protrusion (27).

4. The moving contact clamp assembly according to claim 3, characterized in that: The other end of the clamp mounting part (7) is bent vertically to form a clamp end stop (25) and a clamp insertion part (26) that is parallel to the clamp mounting part (7) and is used to be inserted into the circuit breaker housing.

5. The moving contact clamp assembly according to claim 2, characterized in that: The movable contact plate (14) is provided with a movable contact plate locking block (30). The torsion spring (4) includes a first helical part (34) and a second helical part (35). The inner lead-out end of the first helical part (34) and the inner lead-out end of the second helical part (35) are connected together to form a torsion spring driving part (39). The outer ends of the first helical part (34) and the second helical part (35) are provided with torsion spring limiting feet (38) that are opposite to the torsion spring driving part (39). The first helical part (34) and the second helical part (35) are provided with torsion spring through holes (36) that are axially connected and sleeved on the connecting shaft (5). The outer ends of the first helical part (34) and the second helical part (35) are placed outside the locking member wrapping part (22), and the torsion spring driving part (39) is locked onto the movable contact plate locking block (30).

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