Rotating shaft structure of double-breakpoint molded case circuit breaker

Abstract

The utility model relates to the technical field of circuit breaker structures, in particular to a rotating shaft structure of a double-breakpoint molded case circuit breaker, which is characterized in that a rotating shaft main body is of an integral structure design, a contact groove is formed in the rotating shaft main body along the radial direction, the middle part of a moving contact is inserted into the contact groove, and two ends of the moving contact penetrate out along an opening of the contact groove; the static spring shaft and the moving spring shaft are used for being in butt joint with the static contact, the static spring shaft and the moving spring shaft are located on the two sides of the moving contact respectively, the two ends of the contact spring are connected to the static spring shaft and the moving spring shaft respectively, and the moving spring shaft is pulled through elastic tension of the contact spring so that the two sides of the moving contact can abut against the inner side wall of the contact groove respectively. Due to the integral structure design of the rotating shaft main body, the three-phase synchronism of the molded case circuit breaker is consistent, the limit breaking capacity and the operation breaking capacity of the circuit breaker are greatly improved, the safety and the reliability of the circuit breaker in operation are improved, and the electrical life of the circuit breaker is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker structure technical field especially relates to a double breakpoint plastic -clad circuit breaker pivot structure. BACKGROUND

[0002] The existing low voltage plastic shell type circuit breaker is mainly used for distributing electric energy, protects line and power supply equipment from overload, short circuit and ground fault danger, and reliably guarantees the safety of electric equipment and human body, and the safe operation of line and power supply equipment is directly related to the structure of plastic -clad circuit breaker. However, the pivot of the existing conventional double breakpoint plastic shell type circuit breaker adopts sectional combined structure, although it has the benefit that manufacturing and assembling are relatively convenient, but the sectional pivot structure has problems such as machining error, inconsistent shrinkage of material and inherent fitting gap, so that the machining precision of the pivot is required to be higher, so as to improve the consistency and fitting accuracy of each section of the pivot, in actual operation, even so, it is difficult to meet the corresponding multi-phase synchronism requirement of each section of the pivot, resulting in error in the closing and separation of the multi-phase moving contact and multi-phase static contact, so that there are problems of prior contact and separation in the process of opening and closing, and the moving contact and static contact of the latter contact and separation are seriously burnt, which affects the electrical life of the circuit breaker, thereby directly affecting the operation safety of the electrical system and equipment, and further optimization is required. SUMMARY

[0003] Therefore, the utility model discloses a double breakpoint plastic -clad circuit breaker pivot structure to solve the problem that the sectional pivot structure in the conventional plastic -clad circuit breaker is difficult to meet the corresponding multi-phase synchronism requirement of each section of the pivot, thereby directly affecting the operation safety of the electrical system and equipment.

[0004] In order to achieve the above purpose, the utility model provides a double breakpoint plastic -clad circuit breaker pivot structure, which comprises a pivot main body and a moving contact connected to the pivot main body.

[0005] The pivot main body is designed in one piece, the pivot main body is provided with a contact groove in the radial direction, the two ends of the contact groove are designed as openings, the middle part of the moving contact is inserted into the contact groove, and the two ends of the moving contact are inserted into the opening of the contact groove and connected to the static contact.

[0006] The pivot main body is provided with a placing groove parallel to the axial direction, the placing groove is provided with a static spring shaft, the contact groove is provided with a moving spring shaft and a contact spring, the static spring shaft and the moving spring shaft are respectively located on the two sides of the moving contact, and the two ends of the contact spring are respectively connected to the static spring shaft and the moving spring shaft.

[0007] Preferably, the two ends of the contact spring are designed as hook-shaped structures to hook onto the stationary spring shaft and the moving spring shaft respectively.

[0008] Preferably, the contact springs are respectively located on the front and rear sides of the moving contact.

[0009] Preferably, the moving contact has arc-shaped notches on both sides, and the moving spring shaft is pulled by the elastic tension of the contact spring so that the moving spring shaft abuts against the arc-shaped notch.

[0010] Preferably, an arc-shaped transition section is provided between the middle part and the end of the moving contact. The elastic tension of the contact spring pulls the moving spring shaft so that the concave surface of the arc-shaped transition section abuts against the inner wall of the contact groove.

[0011] Preferably, multiple contact grooves are spaced apart along the axial direction of the rotating shaft body.

[0012] Preferably, the length of the movable spring shaft matches the width of the contact groove. When the movable spring shaft is pulled by the elastic tension of the contact spring, the two end faces of the movable spring shaft abut against the inner wall of the contact groove.

[0013] The beneficial effects of this utility model are as follows: The rotating shaft body is designed as a single integrated structure. A contact groove is formed radially within the rotating shaft body. The middle part of the moving contact is inserted into the contact groove, and both ends of the moving contact protrude through the openings of the contact groove for contact with the stationary contact. A placement groove is formed parallel to the axial direction within the rotating shaft body. A stationary spring shaft is inserted parallel to the placement groove. A moving spring shaft and a contact spring are located within the contact groove. The stationary spring shaft and the moving spring shaft are located on both sides of the moving contact. Both ends of the contact spring are connected to the stationary spring shaft and the moving spring shaft, respectively. The elastic tension of the contact spring pulls the moving spring shaft, causing both sides of the moving contact to abut against the inner wall of the contact groove. Due to the integrated structure design of the rotating shaft body, the three-phase synchronization of the molded case circuit breaker is achieved, greatly improving the circuit breaker's ultimate breaking capacity and operational breaking capacity, enhancing the circuit breaker's safety and reliability during operation, and extending its electrical life. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of the rotating shaft body, moving contact, and stationary contact of this utility model;

[0016] Figure 2It is the whole front view structural schematic diagram of the rotating shaft main body of the utility model;

[0017] Figure 3 It is the whole side view structural schematic diagram of the rotating shaft main body of the utility model;

[0018] Figure 4 It is the sectional view structural schematic diagram of the rotating shaft main body of the utility model;

[0019] Figure 5 It is the structural schematic diagram of the contact groove of the utility model;

[0020] Figure 6 It is the structural schematic diagram of the movable contact of the utility model.

[0021] Marked as in the drawing:

[0022] 100, rotating shaft main body; 200, movable contact; 201, arc transition section; 300, stationary contact; 1, contact groove; 2, placing groove; 3, stationary spring shaft; 4, movable spring shaft; 5, contact spring; 6, arc-shaped notch. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the following will be further detailed in combination with specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the utility model should be understood as the usual meaning by the person skilled in the art to which the utility model belongs. The "first", "second" and similar words used in the utility model do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown in the figure, a double-break plastic shell circuit breaker rotating shaft structure, including rotating shaft body 100 and connected to the rotating shaft body 100 on the moving contact 200, rotating shaft body 100 is an integrated design, rotating shaft body 100 is provided with a contact slot 1 along the radial direction, the two ends of the contact slot 1 is open design, the middle part of the moving contact 200 is inserted into the contact slot 1, the two ends of the moving contact 200 is out along the opening of the contact slot 1, used for and static contact 300 opposite, rotating shaft body 100 is provided with a placement slot 2 parallel to the axial direction, the placement slot 2 is parallel to the static spring shaft 3, the contact slot 1 is provided with a dynamic spring shaft 4 and a contact spring 5, the static spring shaft 3, the dynamic spring shaft 4 is located on both sides of the moving contact 200, the two ends of the contact spring 5 is connected to the static spring shaft 3, the dynamic spring shaft 4, the elastic tension of the contact spring 5 is used to pull the dynamic spring shaft 4, so that the two sides of the moving contact 200 is respectively abutted on the inner side wall of the contact slot 1.

[0026] The utility model discloses based on the structure principle of existing conventional double-break plastic shell circuit breaker, rotatingly setting rotating shaft body 100 and connecting on the moving contact 200 in the base of circuit breaker, especially, rotating shaft body 100 is the integral whole cylindrical structure design of integral type, rotating shaft body 100 is provided with a contact slot 1 along the radial direction, the two ends of the contact slot 1 is open design, the middle part of the moving contact 200 is inserted into the contact slot 1, the two ends of the moving contact 200 is out along the opening of the contact slot 1, used for and static contact 300 opposite, the contact slot 1 is spaced apart and is provided with a plurality of along the axial direction of rotating shaft body 100, specifically can be evenly spaced and arranged three, corresponding to the butt joint of three-phase moving contact 200 and static contact 300, rotating shaft body 100 is provided with a placement slot 2 parallel to the axial direction, the placement slot 2 is parallel to the static spring shaft 3, the contact slot 1 is provided with a dynamic spring shaft 4 and a contact spring 5, specifically, as Figure 4 As shown in the figure, the static spring shaft 3, the dynamic spring shaft 4 is respectively located on the left and right sides of the moving contact 200, the two ends of the contact spring 5 is designed into hook structure, is used for respectively hooking the static spring shaft 3, the dynamic spring shaft 4, and the contact spring 5 is respectively arranged on the front and back of the moving contact 200, whereby the two ends of the contact spring 5 of elastic tension are connected to the static spring shaft 3, the dynamic spring shaft 4, so as to pull the dynamic spring shaft 4 through the elastic tension of the contact spring 5, so that the left and right sides of the moving contact 200 is respectively abutted on the inner side wall of the contact slot 1, to this elastic potential energy is stored, help operating mechanism to pull apart the moving contact quickly, ensure reliable breaking and quick release, rotating shaft body 100 specifically can adopt the high strength insulating material of existing conventional, because the integral structure design of rotating shaft body 100 makes plastic shell circuit breaker three-phase synchronism reach the consistency, greatly improves circuit breaker limit breaking and operating breaking capacity, improves the safety, reliability of circuit breaker in operation, improves circuit breaker electrical life.

[0027] The static spring shaft 3 and the dynamic spring shaft 4 can be designed in the shape of a cylinder, the static spring shaft 3 is designed as a long shaft, the length of the static spring shaft 3 is matched with the axial length of the rotating shaft body 100, the dynamic spring shaft 4 is designed as a short shaft, the length of the dynamic spring shaft 4 is matched with the width of the contact groove 1, when the dynamic spring shaft 4 is pulled by the elastic tension of the contact spring 5, the two end faces of the dynamic spring shaft 4 abut on the inner walls of the contact groove 1, in the specific assembly, the dynamic contact 200 is inserted into the contact groove 1 first, then the contact spring 5 is placed on the front and back of the dynamic contact 200, then the static spring shaft 3 is inserted into the placing groove 2 and is connected with the one end hook structure of the contact spring 5, then the other end of the contact spring 5 is hooked or pulled out by using a hook or a finger inserted into the opening of the contact groove 1, then the dynamic spring shaft 4 is placed into the other end hook structure of the contact spring 5, then the hooked dynamic spring shaft 4 is placed into the contact groove 1, at this time, the two end faces of the dynamic spring shaft 4 abut on the inner walls of the contact groove 1, so that the dynamic spring shaft 4 is pulled by the elastic tension of the contact spring 5, so that the left and right sides of the dynamic contact 200 abut on the inner walls of the contact groove 1, the circuit breaker rotating shaft structure is simple, convenient to assemble, and has higher safety and reliability.

[0028] In the embodiment of the utility model, optional, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 The two sides of the dynamic contact 200 are respectively provided with arc-shaped notches 6, the dynamic spring shaft 4 is pulled by the elastic tension of the contact spring 5, so that the dynamic spring shaft 4 abuts in the arc-shaped notch 6, so that the dynamic spring shaft 4 stably pushes the dynamic contact 200, so that the left and right sides of the dynamic contact 200 abut on the inner walls of the contact groove 1.

[0029] In the embodiment of the utility model, optional, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 The arc-shaped transition section 201 is arranged between the middle part of the dynamic contact 200 and the end part of the dynamic contact 200, the arc-shaped notch 6 is located on the outer convex surface of the arc-shaped transition section 201, the dynamic spring shaft 4 is pulled by the elastic tension of the contact spring 5, so that the inner concave surface of the arc-shaped transition section 201 abuts on the inner walls of the contact groove 1, specifically, the inner side of the contact groove 1 is designed as an arc-shaped shape matched with the arc-shaped transition section 201, so that the dynamic contact 200 is more stably abutted on the inner side of the contact groove 1.

[0030] Specifically, as Figure 4 、 Figure 6As shown, the arc-shaped transition section 201 is designed as a concave structure at the position adjacent to the arc-shaped notch 6, which further facilitates the sliding of the limiting dynamic spring shaft 4.

[0031] When the moving contact 200 contacts the static contact 300 during the opening and closing process of the circuit breaker switch, the contact spring 5 always keeps a certain pressure on the moving contact 200, so as to ensure that the switch does not have a too high temperature rise during operation, and to ensure the safe operation of the circuit breaker and personal safety, that is, the reliable contact between the moving and static contacts is always maintained through the contact spring 5.

[0032] Those skilled in the art should understand that the above discussion of any embodiment is only exemplary and is not intended to imply that the scope of the utility model is limited to these examples; under the idea of the utility model, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the utility model as described above. In order to be brief, they are not provided in details.

Claims

1. A double-break plastic shell circuit breaker rotating shaft structure, comprising a rotating shaft body (100) and a movable contact (200) connected to the rotating shaft body (100), characterized in that: the rotating shaft body (100) is of an integrated design, and a contact groove (1) is formed in the rotating shaft body (100) along the radial direction thereof, both ends of the contact groove (1) are of an open design, the middle part of the movable contact (200) is inserted into the contact groove (1), and both ends of the movable contact (200) pass through the openings of the contact groove (1) and are used to be connected to a static contact (300); a placement groove (2) is formed in the rotating shaft body (100) parallel to the axial direction thereof, a static spring shaft (3) is inserted into the placement groove (2) in parallel, a movable spring shaft (4) and a contact spring (5) are arranged in the contact groove (1), the static spring shaft (3) and the movable spring shaft (4) are respectively arranged on both sides of the movable contact (200), and both ends of the contact spring (5) are connected to the static spring shaft (3) and the movable spring shaft (4) respectively, the movable spring shaft (4) is pulled by the elastic tension of the contact spring (5), so that both sides of the movable contact (200) are respectively abutted against the inner side walls of the contact groove (1).

2. The dual-break plastic molded case circuit breaker rotating shaft structure of claim 1, wherein, both ends of the contact spring (5) are designed as hook-shaped structures and are used to hook the static spring shaft (3) and the movable spring shaft (4) respectively.

3. The dual-break plastic molded case circuit breaker rotating shaft structure of claim 1, wherein, the contact spring (5) is arranged on both front and back surfaces of the movable contact (200) respectively.

4. The dual-break plastic molded case circuit breaker rotating shaft structure of claim 1, wherein, both sides of the movable contact (200) are respectively provided with arc-shaped notches (6), the movable spring shaft (4) is pulled by the elastic tension of the contact spring (5), so that the movable spring shaft (4) is abutted against the arc-shaped notches (6).

5. The dual-break plastic molded case circuit breaker rotating shaft structure of claim 1, wherein, an arc-shaped transition section (201) is arranged between the middle part of the movable contact (200) and the end part of the movable contact (200), the movable spring shaft (4) is pulled by the elastic tension of the contact spring (5), so that the inner concave surface of the arc-shaped transition section (201) is abutted against the inner side walls of the contact groove (1).

6. The dual-break plastic molded case circuit breaker rotating shaft structure of claim 1, wherein, a plurality of contact grooves (1) are arranged in the axial direction of the rotating shaft body (100) in a spaced manner.

7. The dual-break plastic molded case circuit breaker rotating shaft structure of claim 1, wherein, the length of the movable spring shaft (4) is matched with the width of the contact groove (1), when the movable spring shaft (4) is pulled by the elastic tension of the contact spring (5), both end faces of the movable spring shaft (4) are respectively abutted against the inner walls of the contact groove (1).

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