Molded case circuit breaker repulsion static contact and tool clamp

Abstract

The utility model belongs to the technical field of static contact structures, in particular to a repulsive static contact of a molded case circuit breaker and a work fixture, comprising a repulsive static contact assembly, the repulsive static contact assembly comprises a static contact, an iron support, a torsion spring, a first shaft, a second shaft, a third shaft and a static housing; the static contact is located in the iron support. The first shaft is connected with the iron support, the static contact and the torsion spring in a penetrating mode, a shaft rod perpendicular to a main body is arranged at the position of the main body of the torsion spring, and the shaft rod penetrates through the iron support. A second shaft is arranged in the static contact, the second shaft is located above the torsion spring, the repulsive static contact is designed to be movable, when short-circuit current passes through the molded case circuit breaker, the moving contact and the static contact are opened reversely at the same time, the breaking time is greatly shortened, and the short-circuit breaking capacity is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of static contact structures, and particularly relates to a repulsive force static contact and a tooling fixture for a molded case circuit breaker. Background Technique

[0002] A molded case circuit breaker refers to a mechanical switching device that can connect, carry, and break the current under normal circuit conditions, and can connect, carry for a certain time, and break the current under specified abnormal conditions (such as short - circuit conditions). Usually, a plastic insulator is used as the housing of the device.

[0003] In the prior art, as disclosed in the application number: 202322417143, the contact end of the static contact is connected and fixed to the Z - shaped rod through a U - shaped arc - guiding plate, shortening the arc - guiding distance to the arc - extinguishing chamber, ensuring that the arc on the static contact is quickly guided into the arc - extinguishing chamber, and the static contact cover is located in the arc - extinguishing chamber to accelerate the arc - extinguishing work. After the static contact is installed, it is immovable. When the molded case circuit breaker is energized with a short - circuit current, only the moving contact rotates, and the static contact remains stationary, so the short - circuit breaking capacity is not high. Content of the Utility Model

[0004] To solve the problems mentioned in the above - mentioned background technique, the repulsive force static contact is designed to be movable. When the molded case circuit breaker is energized with a short - circuit current, the moving and static contacts open in opposite directions simultaneously, greatly shortening the breaking time and improving the short - circuit breaking capacity.

[0005] In the first aspect of the utility model, a repulsive force static contact for a molded case circuit breaker is provided, including a repulsive force static contact assembly, which is characterized in that: the repulsive force static contact assembly includes a static contact, an iron bracket, a torsion spring, a first shaft, a second shaft, a third shaft, and a static cover shell; the static contact is located inside the iron bracket; the first shaft penetrates and connects the iron bracket, the static contact, and the torsion spring. A shaft rod perpendicular to the main body is provided at the main body of the torsion spring, and the shaft rod penetrates through the iron bracket; a second shaft is provided inside the static contact, and the second shaft is located above the torsion spring.

[0006] Preferably, the iron bracket is provided with a first hole, and the static contact is provided with a corresponding second hole; the first hole and the second hole are connected through the third shaft.

[0007] Preferably, the static cover shell is riveted on the top of the static contact.

[0008] In the second aspect of the utility model, a tooling fixture is provided. The tooling fixture includes a positioning seat; a plurality of positioning columns are provided inside the positioning seat for clamping and positioning the repulsive force static contact assembly; the tooling fixture further includes a support rod, the support rod is inserted into the base; the support rod is movably connected to a positioning frame; the positioning frame can move up and down relative to the support rod.

[0009] Preferably, a rack shaft that can be movably inserted is provided inside the positioning frame. A connecting sleeve is connected to the bottom of the rack shaft; the connecting sleeve is fixedly connected to the pressing head part; the positioning seat is fixedly connected to two support columns; the support columns are also inserted into the pressing head part, and the pressing head part can move up and down relative to the support columns.

[0010] Preferably, the positioning frame includes a connecting rod; the rack shaft and the connecting rod are connected by a tension spring.

[0011] Preferably, a handle is provided on one side of the positioning frame. The handle is installed on a gear shaft. The gear shaft is provided with a gear. The rack shaft is provided with a corresponding gear. The gear shaft is inserted into the positioning frame and meshed with the rack shaft. When the handle is rotated, the gear shaft also rotates accordingly.

[0012] Preferably, the fixture further includes a base; the positioning seat is riveted to the base.

[0013] Compared with the prior art, the present utility model provides a repulsive force static contact and a fixture for a plastic case circuit breaker, having at least one of the following beneficial effects:

[0014] 1. A movable repulsive force static contact is realized, greatly improving the short-circuit breaking capacity of the plastic case circuit breaker. At the same time, with the fixture, rapid batch installation is realized, improving the work efficiency.

[0015] 2. By moving the rack shaft and the pressing head up and down, the torsion spring can be more precisely compressed, and then the second hole of the static contact and the first hole of the iron bracket can be aligned, facilitating the installation of the third shaft; assembling the repulsive force static contact through this fixture is quick and simple, improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application, form a part of the present application, and the schematic embodiments and descriptions thereof are used to explain the present application, not constituting an improper limitation to the present application. In the drawings:

[0017] Figure 1 is a three-dimensional view of a repulsive force static contact of a plastic case circuit breaker according to an embodiment of the present utility model.

[0018] Figure 2 is a three-dimensional view of the first direction of an embodiment of the present utility model.

[0019] Figure 3 is a three-dimensional view of the second direction of an embodiment of the present utility model.

[0020] Figure 4 is Figure 3 the schematic view in the A direction of

[0021] Figure 5 is a three-dimensional view of a fixture.

[0022] Reference numerals

[0023] 1 - Repulsive static contact component; 11 - Static contact; 111 - Second hole; 12 - Iron bracket; 121 - First hole; 13 - Torsion spring; 131 - Shaft rod; 14 - First shaft; 15 - Second shaft; 16 - Third shaft; 17 - Static housing; 2 - Tooling fixture; 21 - Positioning seat; 211 - Positioning post; 22 - Support rod; 23 - Positioning frame; 231 - Connecting rod; 24 - Rack shaft; 241 - Connecting sleeve; 25 - Pressing head part; 26 - Handle; 27 - Gear shaft; 28 - Tension spring; 29 - Base; 30 - Support column; Detailed implementation manners

[0024] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0025] Generally, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model claimed, but merely represents the selected embodiments of the present utility model.

[0026] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the scope of protection of the present utility model.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover a non - exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. In this specification, the schematic representation of the above - mentioned terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0029] As Figures 1 to 4 shown, the present utility model provides a repulsive static contact for a plastic case circuit breaker, which includes a repulsive static contact assembly 1. The repulsive static contact assembly 1 includes a static contact 11, an iron bracket 12, a torsion spring 13, a first shaft 14, a second shaft 15, a third shaft 16 and a static cover 17. The static contact 11 is located inside the iron bracket 12. The first shaft 14 passes through and connects the iron bracket 12, the static contact 11 and the torsion spring 13. A shaft rod 131 perpendicular to the main body is provided at the main body of the torsion spring 13, and the shaft rod 131 passes through the iron bracket 12. A second shaft 15 is provided inside the static contact 11, and the second shaft 15 is located above the torsion spring 13. By connecting the static contact 11 with the torsion spring 13, a movable repulsive static contact is realized, the short-circuit breaking capacity of the plastic case circuit breaker is improved, and at the same time, with the aid of a tooling fixture, rapid batch installation is realized, and the work efficiency is improved. The iron bracket 12 is provided with a first hole 121, and the static contact 11 is provided with a corresponding second hole 111. The first hole 121 and the second hole 111 are connected by the third shaft 16. The static cover 17 is riveted on the top of the static contact 11.

[0030] As Figures 2 to 5As shown in the figure, the present utility model also provides a tooling fixture. The tooling fixture 2 includes a positioning seat 21; a plurality of positioning columns 211 are provided inside the positioning seat 21, and the repulsive static contact component 1 is clamped between the positioning columns 211 and the bottom surface of the positioning seat 21; the tooling fixture 2 further includes a support rod 22, and the support rod 22 is inserted into the base 21; the support rod 22 is movably connected to a positioning frame 23; the positioning frame 23 can move up and down relative to the support rod 22; a rack shaft 24 that can be movably inserted is provided inside the positioning frame 23, and a connecting sleeve 241 is connected to the bottom of the rack shaft 24; the connecting sleeve 241 is fixedly connected to a pressing head member 25; the positioning frame 23 includes a connecting rod 231; the rack shaft 24 and the connecting rod 231 are connected by a tension spring 28; the positioning seat 21 is fixedly connected to two support columns 30; the support columns 30 also insert into the pressing head member 25, and the pressing head member 25 can move up and down relative to the support columns 30; a handle 26 is provided on one side of the positioning frame 23, the handle 26 is installed on a gear shaft 27, the gear shaft 27 is provided with a gear, the rack shaft 27 is provided with a corresponding gear, the gear shaft 27 is inserted into the positioning frame 23 and meshed with the rack shaft 27. When the handle 26 is rotated, the gear shaft 27 also rotates accordingly, driving the rack shaft 27 to move downward. The tension spring 28 above the rack shaft 27 is stretched, and the pressing head member 25 below the rack shaft 27 slowly moves downward, causing the static contact 11 and the second shaft 15 to move downward, causing the torsion spring 13 to be forced to rotate downward until the pressing head member 25 abuts against the positioning seat 21. At this time, the second hole 111 on the static contact 11 is aligned with the first hole 121 of the iron bracket, facilitating the third shaft 16 to penetrate through the first hole 121 and the second hole 111; the tooling fixture 2 further includes a base 29; the positioning seat 21 is riveted to the base 29.

[0031] Assembly process of the repulsive static contact of the molded case circuit breaker: Place the torsion spring 13 into the iron bracket 12. One end of the torsion spring 13 is inserted into the first hole 121 on the iron bracket 12, and the other end of the torsion spring 13 is suspended. Thread it through with the first shaft 14, and then place it in the cavity of the positioning seat 21 for fixation. Slip the static cover 17 over the static contact 11 and rivet it. Pass the second shaft through the second hole 111 on the static contact 11, and place the assembled component into the iron bracket 12 so that the second shaft 15 abuts against the torsion spring 13. When the handle 26 is rotated counterclockwise, the gear shaft 27 also rotates counterclockwise, driving the rack shaft 27 to move downward. The tension spring 28 above the rack shaft 27 is stretched, and the pressure head part 25 below the rack shaft 27 slowly moves downward, causing the static contact 11 and the second shaft 15 to move downward, making the torsion spring 13 rotate downward under force until the pressure head part 25 abuts against the positioning seat 21. At this time, the second hole 111 on the static contact 11 is aligned with the first hole 121 of the iron bracket 12. Pass the static contact 11 and the iron bracket 12 through with the third shaft 16; after releasing the handle 26, the tension spring 28 above the rack shaft 27 contracts and drives the rack shaft 27 to move upward until it returns to its original position. Remove the repulsive static contact component 1, and the assembly of the repulsive static contact is completed.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A repulsive static contact of a molded case circuit breaker, comprising a repulsive static contact assembly, characterized in that: The repulsive static contact component includes a static contact, an iron bracket, a torsion spring, a first shaft, a second shaft, a third shaft, and a static housing; the static contact is located within the iron bracket; the first shaft penetrates and connects the iron bracket, the static contact, and the torsion spring. A shaft rod perpendicular to the main body is provided at the main body of the torsion spring, and the shaft rod penetrates through the iron bracket; a second shaft is provided within the static contact, and the second shaft is located above the torsion spring.

2. The repulsive static contact of the plastic case circuit breaker according to claim 1, characterized in that: The iron bracket is provided with a first hole, and the static contact is provided with a corresponding second hole; the first hole and the second hole are connected by a third shaft.

3. The repulsive static contact of the plastic case circuit breaker according to claim 1, characterized in that: The static housing is riveted to the top of the static contact.

4. A fixture, characterized in that: The tooling fixture includes a positioning seat; a plurality of positioning posts are provided within the positioning seat for clamping and positioning the repulsive static contact component; the tooling fixture further includes a support rod, the support rod is inserted into the base; the support rod is movably connected to a positioning frame; the positioning frame can move up and down relative to the support rod.

5. The tooling fixture according to claim 4, wherein: A rack shaft that can be movably inserted is provided within the positioning frame, a connecting sleeve is connected to the bottom of the rack shaft; the connecting sleeve is fixedly connected to a pressing head member; the positioning seat is fixedly connected to two support columns; the support columns also insert the pressing head member, and the pressing head member can move up and down relative to the support columns.

6. The tooling fixture according to claim 5, characterized in that: The positioning frame includes a connecting rod; the rack shaft and the connecting rod are connected by a tension spring.

7. The tooling fixture according to claim 5, wherein: A handle is provided on one side of the positioning frame, the handle is installed on a gear shaft, the gear shaft is provided with a gear, a corresponding gear is provided on the rack shaft, the gear shaft is inserted into the positioning frame and meshes with the rack shaft, and when the handle is rotated, the gear shaft also rotates accordingly.

8. The tooling fixture according to claim 4, wherein: The tooling fixture further includes a base; the positioning seat is riveted to the base.

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