Frame isolating switch

Abstract

The utility model provides a frame disconnecting switch, which comprises a moving contact support, the moving contact support comprises a contact support shell and a plurality of moving contact pieces installed on the contact support shell, a blind hole is arranged in the contact support shell, a pin shaft can be inserted in the blind hole, the pin shaft can penetrate through a connecting rod, and the connecting rod is connected with the moving contact pieces. The connecting rod is in linkage with the operating mechanism, the blind hole is provided with a spring seat used for preventing the pin shaft from being separated, and the spring seat is provided with an insulating boss extending towards the direction of the pin shaft. And finally, breakdown between the contact mechanism and the operating mechanism is caused.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker technical field, concretely relates to a frame disconnecting switch. BACKGROUND

[0002] The structure of the frame type circuit breaker with complex structure in low voltage electric appliance directly influences the assembly, inspection, maintenance of the circuit breaker, and further influences the mechanical performance and electrical performance of the circuit breaker. With the requirement of miniaturization and more and more powerful function of the distribution system to the circuit breaker, the structure of the circuit breaker is more and more compact, a good structure can improve the working reliability of the circuit breaker and play a role of more than the sum of its parts in the production process of assembly, inspection and maintenance, in the prior art, the utility model patent with the patent publication number CN201868349U discloses a double-break universal circuit breaker, which comprises a moving contact support, a contact piece, a pin shaft arranged on the moving contact support, a locking spring arranged outside the pin shaft, when installing and dismounting, a tool is inserted into the pin pulling hole, the locking spring is compressed, the pin shaft can be inserted into or separated from the arc-shaped blind hole on the cam cantilever, but in the process of opening and closing, the electric arc on the moving contact is conducted to the operating mechanism through the guide shaft clamp plate and the pin shaft, since the locking spring is made of metal material, the locking spring has conductivity, the creepage distance between the contact mechanism and the operating mechanism is not enough, and finally the contact mechanism and the operating mechanism are broken down. CONTENT

[0003] Therefore, the utility model solves the technical problem that the contact mechanism and the operating mechanism in the prior art do not reach enough creepage distance, and finally the contact mechanism and the operating mechanism are broken down, so as to provide a frame disconnecting switch which increases the creepage distance and improves the impact resistance.

[0004] Therefore, the utility model provides a frame disconnecting switch, which comprises a moving contact support, the moving contact support comprises a contact support shell and a plurality of moving contact pieces installed on the contact support shell, a blind hole is arranged in the contact support shell, a pin shaft can be inserted into the blind hole, the pin shaft can pass through a connecting rod, the connecting rod is linked with an operating mechanism, a spring seat for placing the pin shaft is arranged at the blind hole, and the spring seat is provided with an insulating boss extending towards the pin shaft.

[0005] Further, the insulating boss comprises a first boss which can be inserted into the blind hole, one end of the first boss is connected with the spring seat, and the other end of the first boss can abut against the pin shaft.

[0006] Further, a second boss is arranged outside the first boss, a first embedding groove for embedding the second boss is arranged on the contact support shell, and a gap is arranged between the first boss and the second boss.

[0007] Further, the first boss outer side is provided with a third boss, and the third boss is in contact with the first slot side wall.

[0008] Further, at least one sealing element is arranged between the insulating boss and the contact support shell.

[0009] Further, at least one sealing element is arranged between the insulating boss and the contact support shell.

[0010] Further, the sealing element comprises a first sealing ring, the first sealing ring is sleeved on the first boss outer side and is in contact between the third boss and the first slot inner side wall.

[0011] Further, the contact support shell is further provided with a second slot for embedding the spring seat, and the sealing element comprises a second sealing ring, the second sealing ring is sleeved on the second boss outer side and is in contact between the spring seat and the second slot inner side wall.

[0012] Further, clamping plates are arranged on both sides of the contact support shell, and the clamping plates and the contact support shell are fixedly connected through fastening nails.

[0013] The technical scheme of the utility model has the following advantages:

[0014] 1. Compared with the prior art, the length of the pin shaft is shortened, and the insulating boss is arranged at the position of the spring seat towards the pin shaft, so that when the current passes through the spring seat, it needs to pass through the surface of the insulating boss, thereby effectively increasing the creepage distance between the moving contact piece and the pin shaft (the creepage distance refers to the distance of current flowing along the shortest path on the surface of insulating material), and improving the impact resistance of the product.

[0015] 2. The insulating boss of the utility model comprises a first boss capable of being inserted into a blind hole, one end of the first boss is in contact with the pin shaft, thereby fixing the position of the pin shaft and preventing the pin shaft from moving, and the first boss can be inserted into the blind hole because the length of the pin shaft is reduced, so that the current on the moving contact piece needs to pass through the surface of the spring seat first and then extend to the surface of the first boss, thereby increasing the creepage distance between the moving contact piece and the pin shaft to improve the impact resistance of the product. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 The overall structure diagram of the contact support;

[0018] Figure 2 The side view of the contact support;

[0019] Figure 3 The cross-sectional structure diagram of the contact support;

[0020] Figure 4 Another cross-sectional structure diagram of the contact support;

[0021] Figure 5 The overall structure diagram of the contact support; Figure 4 The enlarged view of the A part in the middle;

[0022] Figure 6 The connection structure diagram of the connecting rod and the pin shaft.

[0023] Explanation of reference signs:

[0024] 1, moving contact support; 11, contact support shell; 12, moving contact piece; 2, blind hole; 21, pin shaft; 3, connecting rod; 4, spring seat; 5, insulating boss; 51, first boss; 52, second boss; 53, third boss; 6, first embedding groove; 7, sealing element; 71, first sealing ring; 72, second sealing ring; 8, second embedding groove; 9, clamping plate; 91, fastening nail. DETAILED DESCRIPTION

[0025] The technical solutions of the present application will be described below in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0026] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore cannot be understood as the limitation of the utility model. In addition, the term "first", "second", "third" is only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the utility model, it needs to explain, unless otherwise explicitly provided and limited, the term "installation", "connection", "connect" should be broad understanding, for example, can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0028] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0029] Embodiment

[0030] The embodiment provides a frame disconnecting switch, which comprises a movable contact support 1, the movable contact support 1 comprises a contact support shell 11 and a plurality of movable contact pieces 12 installed on the contact support shell 11, a blind hole 2 is arranged in the contact support shell 11, a pin shaft 21 can be inserted in the blind hole 2, the pin shaft 21 can pass through a connecting rod 3, the connecting rod 3 is connected with an operating mechanism in linkage, a spring seat 4 for placing the pin shaft 21 is arranged at the blind hole 2, and the spring seat 4 is provided with an insulating boss 5 extending towards the pin shaft 21.

[0031] The above specific improvement is as follows: Figures 1-5As shown, when the moving contact piece 12 is separated from the static contact piece, the moving contact support 1 will swing towards the side close to the operating mechanism, thereby moving the operating mechanism through the connecting rod 3. When the moving contact piece 12 is separated from the static contact piece, electric arcs will be generated, which will be conducted to the pin shaft 21 through the moving contact piece 12. If there is not enough creepage distance between the moving contact piece 12 and the pin shaft 21, the operating mechanism is easy to be punctured. Compared with the prior art, the insulating boss 5 is arranged at the position of the spring seat 4 towards the pin shaft 21. Through the arrangement of the insulating boss 5, when the current passes through the spring seat 4, it needs to pass through the surface of the insulating boss 5 again. Thus, the creepage distance between the moving contact piece 12 and the pin shaft 21 can be effectively increased (the creepage distance refers to the distance of the current flowing along the shortest path on the surface of the insulating material), and the impact resistance of the product is improved.

[0032] On the basis of the above embodiment: the insulating boss 5 comprises a first boss 51 capable of being inserted into the blind hole 2, one end of the first boss 51 is connected with the spring seat 4, and the other end is capable of abutting against the pin shaft 21.

[0033] The specific improvement is that, as shown in Figure 4 and Figure 5 The insulating boss 5 comprises a first boss 51 capable of being inserted into the blind hole 2, one end of the first boss 51 abuts against the pin shaft 21, thereby fixing the position of the pin shaft 21 and preventing the pin shaft 21 from moving. In order to enable the first boss 51 to be inserted into the blind hole 2, the length of the pin shaft 21 is reduced. Thus, the current on the moving contact piece 12 needs to pass through the surface of the spring seat 4 first, and then extend to the surface of the first boss 51. The impact resistance of the product is improved by increasing the creepage distance between the moving contact piece 12 and the pin shaft 21.

[0034] On the basis of the above embodiment: the first boss 51 is externally provided with a second boss 52, the contact support shell 11 is provided with a first embedding groove 6 for embedding the second boss 52, and a gap is arranged between the first boss 51 and the second boss 52.

[0035] The specific improvement is that, as shown in Figures 4-6 In order to further increase the creepage distance between the moving contact piece 12 and the pin shaft 21, the first boss 51 is externally provided with a second boss 52, and a gap is arranged between the first boss 51 and the second boss 52. Thus, the current on the moving contact piece 12 needs to pass through the surface of the spring seat 4 first, then pass through the second boss 52, and then extend through the gap, and finally pass through the surface of the first boss 51. Thus, the creepage distance between the moving contact piece 12 and the pin shaft 21 is further increased, and the impact resistance of the product is effectively improved.

[0036] On the basis of the above embodiment: the first boss 51 is externally provided with a third boss 53, and the third boss 53 abuts against the inner side wall of the first embedding groove 6.

[0037] The specific improvement is that, as shown in Figure 5 In order to further increase the creepage distance, a third protrusion 53 is arranged on the side of the extension protrusion, which can abut against the inner wall of the first slot 6, so as to effectively fix the positions of the spring seat 4, the first protrusion 51, the third protrusion 53 and the second protrusion 52.

[0038] On the basis of the above embodiment, at least one sealing member 7 is arranged between the insulating protrusion 5 and the contact support shell 11.

[0039] The specific improvement is that, as shown in Figure 5 Through the arrangement of the sealing member 7, the electric arc during the impact test of the product can be completely cut off.

[0040] On the basis of the above embodiment, the sealing member 7 comprises a first sealing ring 71, which is sleeved on the outer side of the first protrusion 51 and abuts between the third protrusion 53 and the inner side wall of the first slot 6.

[0041] On the basis of the above embodiment, the contact support shell 11 is further provided with a second slot 8 for embedding the spring seat 4, and the sealing ring comprises a second sealing ring 72, which is sleeved on the outer side of the second protrusion 52 and abuts between the spring seat 4 and the inner side wall of the second slot 8.

[0042] The specific improvement is that, as shown in Figure 5 The first sealing ring 71 is arranged between the third protrusion 53 and the inner side wall of the first slot 6, and the second sealing ring 72 is arranged between the spring seat 4 and the inner side wall of the second slot 8. Through the arrangement of the first sealing ring 71 and the second sealing ring 72, when part of the electric arc passes through the first sealing ring 71, the second sealing ring 72 can switch the part of the electric arc, thereby playing a double insurance role. Through the arrangement of the second slot 8, the spring seat 4 can be embedded, thereby effectively positioning the spring seat 4.

[0043] On the basis of the above embodiment, clamping plates 9 are arranged on both sides of the contact support shell 11, and the clamping plates 9 and the contact support shell 11 are fixedly connected by fastening nails 91.

[0044] The specific improvement is that, as shown in Figure 1 and Figure 2 The clamping plates 9 press the spring seat 4 by self-tapping nails, so as to fix the spring seat 4 in the contact support, thereby further fixing the position of the spring seat 4 and preventing it from falling out of the second slot 8.

[0045] Obviously, the above embodiments are only examples for clearly illustrating the present application and are not intended to limit the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be enumerated. The changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A frame disconnector, characterized by: The moving contact support (1) comprises a contact support shell (11) and a plurality of moving contact pieces (12) mounted on the contact support shell (11), a blind hole (2) is arranged in the contact support shell (11), a pin shaft (21) can be inserted into the blind hole (2), the pin shaft (21) can pass through a connecting rod (3), the connecting rod (3) is connected with an operating mechanism, a spring seat (4) for placing the pin shaft (21) is arranged at the blind hole (2), and an insulating boss (5) extending towards the pin shaft (21) is arranged on the spring seat (4).

2. A frame disconnector according to claim 1, characterized in that: The insulating boss (5) comprises a first boss (51) capable of being inserted into the blind hole (2).

3. A frame disconnector according to claim 2, characterised in that: A second boss (52) is arranged outside the first boss (51), a first embedding groove (6) for embedding the second boss (52) is arranged on the contact support shell (11), and a gap is arranged between the first boss (51) and the second boss (52).

4. A frame disconnector according to claim 3, characterised in that: A third boss (53) is arranged on the outer side of the first boss (51), and the third boss (53) abuts against the side wall of the first embedding groove (6).

5. A frame disconnector according to any one of claims 1-3, characterized in that: At least one sealing member (7) is arranged between the insulating boss (5) and the contact support shell (11).

6. A frame disconnector according to claim 4, characterised in that: At least one sealing member (7) is arranged between the insulating boss (5) and the contact support shell (11).

7. A frame disconnector according to claim 6, characterised in that: The sealing member (7) comprises a first sealing ring (71), the first sealing ring (71) is sleeved on the outer side of the first boss (51) and abuts between the third boss (53) and the inner side wall of the first embedding groove (6).

8. A frame disconnector according to claim 7, characterised in that: A second embedding groove (8) for embedding the spring seat (4) is further arranged on the contact support shell (11), the sealing member comprises a second sealing ring (72), the second sealing ring (72) is sleeved on the outer side of the second boss (52) and abuts between the spring seat (4) and the inner side wall of the second embedding groove (8).

9. A frame disconnector according to claim 8, characterised in that: Clamping plates (9) are arranged on both sides of the contact support shell (11), and the clamping plates (9) and the contact support shell (11) are fixedly connected by fastening nails (91).

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