Overtravel structure of circuit breaker

Abstract

The utility model discloses an overtravel structure of a circuit breaker, which is characterized in that a base is provided with a rotating shaft groove and a concave cavity, and the concave cavity is communicated with the bottom surface of the rotating shaft groove; the clamping piece is accommodated in the concave cavity, and the wear resistance of the clamping piece is greater than that of the base; the rotating shaft is matched with the rotating shaft groove and the clamping piece for relative rotation; through the arrangement of the clamping pieces, the contact area between the rotating shaft and the base is increased, the structural strength is improved, the service life of the circuit breaker is prolonged while the performance of the circuit breaker is maintained, meanwhile, the abrasion caused by friction is reduced through the arrangement of the abrasion resistance of the clamping pieces, and the service life of the circuit breaker can also be prolonged; and secondly, the installation is convenient, the installation process of the clamping piece is simple, and other parts of the circuit breaker do not need to be greatly modified. A user can install the clamping pieces according to actual needs so as to achieve the optimal over-travel effect.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to an overtravel structure of a circuit breaker. Background Art

[0002] In the electrical field, the role of overtravel is to provide sufficient contact pressure for reliable contact between the moving contact and the static contact, to avoid insufficient contact pressure due to electromagnetic fluctuations, and to ensure that the contacts can still generate a large contact pressure after a certain degree of wear.

[0003] In current low-voltage circuit breaker designs, overtravel is a key factor in ensuring mechanical performance and lifespan. Excessive or insufficient overtravel can affect circuit breaker performance. Appropriate overtravel ensures superior safety and functionality. Overtravel often decreases with age, negatively impacting product lifespan and performance. Overtravel is affected by many factors, including the rotating shaft (with the moving contact blade fixed) and base, which rotate in a rotational connection. This wear between the shaft and base can lead to a reduction in overtravel. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present invention is how to reduce the influence of wear on overtravel. To this end, an overtravel structure of a circuit breaker includes:

[0005] A base, wherein the base is provided with a rotating shaft groove and a concave cavity, and the concave cavity is communicated with the bottom surface of the rotating shaft groove;

[0006] a clip, the clip being accommodated in the concave cavity, wherein the wear resistance of the clip is greater than the wear resistance of the base;

[0007] The rotating shaft cooperates with the rotating shaft groove and the clip to rotate relative to each other.

[0008] The clip is provided with a groove, and the bottom surface of the groove is coplanar with the bottom surface of the shaft groove; or, the bottom surface of the groove is higher than the bottom surface of the shaft groove, and the height from the bottom surface of the groove to the bottom surface of the shaft groove is 1-3 mm.

[0009] The clip is provided with two supporting legs extending upward, and the supporting legs abut against the side walls of the rotating shaft groove.

[0010] A limiting groove is provided on the side wall of the rotating shaft groove, and the supporting leg is partially embedded in the limiting groove.

[0011] One of the clip and the rotating shaft groove is provided with a positioning protrusion, and the other of the clip and the rotating shaft groove is provided with a positioning groove matched with the positioning protrusion.

[0012] The positioning protrusion is arranged on the supporting foot, and the positioning groove is arranged on the limiting groove.

[0013] The invention also includes an adjustment structure for adjusting the height of the clip relative to the base.

[0014] The adjusting structure includes an adjusting piece, and the adjusting piece extends through the bottom surface of the base to the concave cavity and cooperates with the clip.

[0015] The adjusting member is connected to the clip by threads.

[0016] The clip is made of POM material.

[0017] The technical solution of this utility model has the following advantages:

[0018] 1. This utility model provides a circuit breaker overtravel structure. By using a clip, the contact area between the rotating shaft and the base is increased, enhancing the structural strength. This maintains circuit breaker performance while extending its service life. The clip's wear resistance also reduces wear caused by friction, further extending the circuit breaker's service life. Furthermore, the clip is easy to install, and the installation process is simple, requiring no significant modifications to other parts of the circuit breaker. Users can install the clip according to their needs to achieve the optimal overtravel effect.

[0019] 2. The utility model provides an overtravel structure for a circuit breaker. This structural arrangement forms a matching effect between the clip, the shaft groove and the shaft, thereby improving the matching effect.

[0020] 3. The utility model provides an overtravel structure for a circuit breaker. The setting of the support legs creates a clamping and fixing effect, while also increasing the contact area between the clip and the cavity and the shaft groove, thereby improving the structural strength.

[0021] 4. The overtravel structure of a circuit breaker provided by the present invention makes the support legs more firmly fixed through the embedded setting, forming a limit in the horizontal direction.

[0022] 5. The utility model provides an overtravel structure for a circuit breaker, wherein the positioning protrusion and the positioning groove form a positioning effect at the initial position, thereby improving the fit between the clip and the rotating shaft.

[0023] 6. The utility model provides an overtravel structure for a circuit breaker. The setting of the adjustment structure forms a position adjustment of the clip. After wear occurs, the position of the clip can be adjusted so that the clip moves up and the rotating shaft returns to its initial state to achieve the best overtravel effect.

[0024] 7. The utility model provides an overtravel structure for a circuit breaker, in which the adjusting member is inserted from below to form an adjusting effect, has a hidden effect, and does not interfere with the internal structure of the circuit breaker.

[0025] 8. The utility model provides an overtravel structure for a circuit breaker, which realizes an adjustment effect through a threaded connection, so that the clip rises to compensate for the loss caused by wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic structural diagram of an overtravel structure of a circuit breaker provided by the utility model;

[0028] Figure 2 A cross-sectional view of an overtravel structure of a circuit breaker provided by the utility model;

[0029] Figure 3 A schematic diagram of the cooperation between the clip and the adjusting member provided by the present utility model;

[0030] Figure 4 A schematic diagram of the partial structure of an overtravel structure of a circuit breaker provided by the utility model;

[0031] Figure 5 for Figure 4 A partial enlarged view of part A in the middle.

[0032] Description of reference numerals:

[0033] 11. Base; 12. Clip; 13. Rotating shaft; 14. Positioning protrusion; 15. Positioning groove; 16. Adjusting member; 111. Rotating shaft groove; 112. Concave cavity; 121. Groove; 122. Support foot; 1111. Limiting groove. DETAILED DESCRIPTION

[0034] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] Example 1

[0039] This embodiment provides an overtravel structure of a circuit breaker, as shown in the attached Figure 1-5 Shown, including:

[0040] The base 11 is provided with a shaft groove 111 and a concave cavity 112, and the concave cavity 112 is connected to the bottom surface of the shaft groove 111. In this embodiment, the concave cavity 112 is located below the shaft groove 111, and the concave cavity 112 is connected to the shaft groove 111. One shaft groove 111 corresponds to one concave cavity 112 or multiple concave cavities 112. The number of shaft grooves 111 here is adjusted according to the size of the circuit breaker. For example, for a three-phase circuit breaker, the number of shaft grooves 111 can be three or four. In this embodiment, one base 11 is provided with three shaft grooves 111, and each shaft groove 111 corresponds to one concave cavity 112. Since the structure of each shaft groove 111 and the concave cavity 112 are consistent, only one shaft groove 111 and the concave cavity 112 are described. Those skilled in the art can adjust the relevant quantity according to actual needs to meet different structural requirements.

[0041] Clip 12 is accommodated in cavity 112. Here, clip 12 can be entirely located in cavity 112, or partially located in cavity 112, with the remaining portion of clip 12 extending into shaft groove 111. Clip 12 has greater wear resistance than base 11. That is, when shaft 13 rotates, shaft 13 cooperates with shaft groove 111 and clip 12, causing wear. However, the degree of wear on clip 12 is less than that on shaft groove 111.

[0042] The rotating shaft 13 cooperates with the rotating shaft groove 111 and the clip 12 to rotate relative to each other. The cooperation here specifically refers to the rotating shaft 13 abutting against the rotating shaft groove 111 and the clip 12. Here, the rotating shaft 13 can abut against the rotating shaft groove 111 and the clip 12 at the same time. The rotating shaft 13 can also abut against the clip 12 first, and then abut against the rotating shaft groove 111 when the clip 12 is worn to a certain extent. Here, the rotating shaft 13 cooperates with the movable contact knife to form contact pressure, and the rotating shaft 13 rotates relative to the base 11. In this embodiment, the rotating shaft 13 cooperates with the three rotating shaft grooves 111 to form a rotation effect. It should be noted that the clip 12 also abuts against the rotating shaft 13 to form a relative rotation effect. The provision of clip 12 increases the contact area between shaft 13 and base 11, enhancing structural strength. This extends the service life of the circuit breaker while maintaining performance. The wear resistance of clip 12 also reduces wear caused by friction, further extending the service life of the circuit breaker. Furthermore, installation is easy and straightforward, requiring no significant modifications to other parts of the circuit breaker. Users can customize the installation of clip 12 to achieve optimal overtravel performance.

[0043] Specifically, as attached Figure 1-5 As shown, the clip 12 is provided with a groove 121, and the bottom surface of the groove 121 is coplanar with the bottom surface of the shaft groove 111. Coplanarity here specifically means that the two are located on the same surface, which can be located on the same plane or on the same arc surface. Alternatively, the bottom surface of the groove 121 is higher than the bottom surface of the shaft groove 111, and the height from the bottom surface of the groove 121 to the bottom surface of the shaft groove 111 is 1-3 micrometers. With a slightly elevated setting, the shaft 13 first cooperates with the clip 12 to form a rotation effect. Then, after the clip 12 is worn, the shaft 13, the shaft groove 111, and the clip 12 are simultaneously abutted, forming a relative rotation effect. This structural setting forms a cooperation effect between the clip 12, the shaft groove 111, and the shaft 13, thereby improving the cooperation effect.

[0044] Specifically, as attached Figure 2-3As shown, the clip 12 is provided with two upwardly extending legs 122. The two legs 122 are located on either side of the groove 121. "Upward" specifically refers to the side away from the bottom surface of the base 11. The legs 122 abut against the side walls of the shaft groove 111. Here, the legs 122 extend upward from the concave cavity 112, ensuring that the shaft 13 fits in the side walls of the shaft groove 111. The provision of the legs 122 creates a clamping and fixing effect while also increasing the contact area between the clip 12 and the concave cavity 112 and the shaft groove 111, thereby improving structural strength. Here, a portion of the clip 12 is located within the concave cavity 112, while the remaining portion of the clip 12 passes through the concave cavity 112 and abuts against the shaft groove 111. In this embodiment, the shaft groove 111 is a U-shaped groove, and the two legs 122 abut against both sides of the U-shaped groove. Furthermore, the two legs 122 also form a U-shaped structure when combined with the groove 121.

[0045] Specifically, the side wall of the shaft groove 111 is provided with a limiting groove 1111, and the support leg 122 is partially embedded in the limiting groove 1111. The embedded setting makes the support leg 122 more firmly fixed, forming a limit in the horizontal direction. Here, the limiting groove 1111 is specifically located on the side wall of the U-shaped groove.

[0046] Specifically, as attached Figure 1-5 As shown, one of the clip 12 and the shaft slot 111 is provided with a positioning protrusion 14, while the other is provided with a positioning groove 15 that cooperates with the positioning protrusion 14. The positioning protrusion 14 and the positioning groove 15 form a positioning effect at the initial position, improving the fit between the clip 12 and the shaft 13. Whether the positioning protrusion 14 is provided on the clip 12 or the shaft slot 111 can be adjusted according to actual needs.

[0047] Specifically, the positioning protrusion 14 is provided on the support leg 122, and the positioning groove 15 is provided in the limiting groove 1111. It should be noted that the positioning protrusion 14 and the positioning groove 15 are only used for initial positioning, forming a limit in the horizontal direction and the vertical downward direction (i.e., the direction perpendicular to the bottom surface of the base 11), but there is no limit in the vertical upward direction, that is, the clip 12 can move vertically upward.

[0048] Specifically, an adjustment structure is included to adjust the height of the clip 12 relative to the base 11. The setting of the adjustment structure forms the position adjustment of the clip 12. After wear occurs, the position of the clip 12 can be adjusted to make the clip 12 move vertically upward and the rotating shaft 13 return to its original state to achieve the best overtravel effect.

[0049] Specifically, as attached Figure 2-3As shown, the adjustment structure includes an adjustment member 16, which extends through the bottom surface of the base 11 into the recessed cavity 112 and engages with the clip 12. The adjustment member 16 is inserted from below, achieving an adjustment effect, providing a hidden effect, and not interfering with the internal structure of the circuit breaker. The base 11 can also be provided with a countersunk hole, so that the portion of the adjustment member 16 located outside the base 11 is embedded in the countersunk hole, further enhancing the concealment effect.

[0050] Specifically, the adjusting member 16 is threadedly connected to the clip 12. The threaded connection achieves an adjustment effect, so that the clip 12 rises vertically upward to compensate for the loss caused by wear.

[0051] Specifically, the clip 12 is made of POM. In this embodiment, the base 11 is made of a plastic insulating material, and the wear resistance of the base 11 is lower than that of the POM. In addition, the clip 12 can also be made of other materials as long as the wear resistance of the clip 12 is higher than that of the base 11.

[0052] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An overtravel structure of a circuit breaker, characterized in that: include: A base (11), the base (11) being provided with a rotating shaft groove (111) and a concave cavity (112), the concave cavity (112) being in communication with the bottom surface of the rotating shaft groove (111); A clip (12), the clip (12) being accommodated in the concave cavity (112), wherein the wear resistance of the clip (12) is greater than the wear resistance of the base (11); A rotating shaft (13) cooperates with the rotating shaft groove (111) and the clip (12) to rotate relative to each other.

2. The overtravel structure of the circuit breaker according to claim 1, characterized in that: The clip (12) is provided with a groove (121), and the bottom surface of the groove (121) is coplanar with the bottom surface of the rotating shaft groove (111); or, the bottom surface of the groove (121) is higher than the bottom surface of the rotating shaft groove (111), and the height from the bottom surface of the groove (121) to the bottom surface of the rotating shaft groove (111) is 1-3 meters.

3. The overtravel structure of the circuit breaker according to claim 1, characterized in that: The clip (12) is provided with two upwardly extending legs (122), and the legs (122) abut against the side walls of the rotating shaft slot (111).

4. The overtravel structure of the circuit breaker according to claim 3, characterized in that: A limiting groove (1111) is provided on the side wall of the rotating shaft groove (111), and the supporting leg (122) is partially embedded in the limiting groove (1111).

5. The overtravel structure of the circuit breaker according to claim 4, characterized in that: One of the clip (12) and the rotating shaft groove (111) is provided with a positioning protrusion (14), and the other of the clip (12) and the rotating shaft groove (111) is provided with a positioning groove (15) that cooperates with the positioning protrusion (14).

6. The overtravel structure of the circuit breaker according to claim 5, characterized in that: The positioning protrusion (14) is provided on the supporting foot (122), and the positioning groove (15) is provided on the limiting groove (1111).

7. The overtravel structure of the circuit breaker according to claim 1, characterized in that: It also includes an adjustment structure, which adjusts the height of the clip (12) relative to the base (11).

8. The overtravel structure of the circuit breaker according to claim 7, characterized in that: The adjustment structure comprises an adjustment member (16), and the adjustment member (16) passes through the bottom surface of the base (11) and extends to the concave cavity (112) to cooperate with the clip (12).

9. The overtravel structure of the circuit breaker according to claim 8, characterized in that: The adjusting member (16) is threadedly connected to the clip (12).

10. The overtravel structure of the circuit breaker according to claim 1, characterized in that: The clip (12) is made of POM material.

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