Circuit breaker structure capable of reducing tripping force

Abstract

A circuit breaker structure capable of reducing tripping force comprises a connecting rod, one end of the connecting rod is linked with an operating handle, and the circuit breaker structure is characterized in that the other end of the connecting rod is linked with two side parts of a mechanism seat and a linkage part on a jump pin, so that the stress of the other end of the connecting rod is dispersed to the two side parts of the mechanism seat and the jump pin; the tripping force required by tripping of the operating mechanism is reduced, the operation stability of the product is improved, and the risk of buckle sliding of the product is reduced. Meanwhile, in the movement process of the operating mechanism, the contact surfaces of the connecting rod, the jump pin and the two side parts of the mechanism seat are adaptively adjusted, so that the abrasion of the upper and lower walls of the mechanism seat and the distortion of the mechanism are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of circuit breakers, and more specifically, it relates to a circuit breaker structure for reducing the tripping force. Background Art

[0002] With the continuous increase of the power grid capacity and the need for centralized power distribution, the electrical appliances are required to have higher and higher breaking capacities. Therefore, the current-limiting contact structure has been widely used in molded case circuit breakers. Especially for the circuit breaker with double-break structure, since the arc energy is borne by two contacts, the breaking capacity is further improved, and it has been more widely developed in recent years. However, the existing double-contact circuit breaker adds a set of moving contact systems, which greatly increases the required operating force. At the same time, the functional components of the existing double-contact operating mechanism are not reasonably arranged, and the forces on each component are uneven. During the movement of the mechanism, large distortion will occur, shortening the service life of the circuit breaker product. Summary of the Invention

[0003] The purpose of the present invention is to address the defects of the existing double-contact circuit breaker operating mechanism, such as unbalanced force, still relatively large required operating force, and poor operating stability. A circuit breaker structure for reducing the tripping force is provided, which distributes the force at the end of the link that is linked to the trip latch to the mechanism base and the trip latch. This reduces the tripping force required for the operating mechanism to trip, improves the operating stability of the product, and reduces the risk of the product slipping the latch.

[0004] Technical Solution

[0005] To achieve the above technical objectives, the present invention provides a circuit breaker structure for reducing the tripping force, which includes a link. One end of the link is linked with the operating handle, and it is characterized in that: the other end of the link is linked with the two side parts of the mechanism base and the linkage part on the trip latch, so that the force at the other end of the link is dispersed to the two side parts of the mechanism base and the trip latch.

[0006] In one embodiment, one end of the link is inserted into the connection hole on the operating handle, and the other end of the link is inserted into the first kidney-shaped hole on one side part of the mechanism base, passes through the linkage part on the trip latch, and then enters the second kidney-shaped hole on the other side part of the mechanism base.

[0007] In one embodiment, the trip latch is rotatably installed in the first installation groove located between the two side parts of the mechanism base on the mechanism base.

[0008] In one embodiment, the trip latch is rotatably installed in the first installation groove between the two side parts of the mechanism base through a trip latch shaft.

[0009] In one embodiment, the limiting grooves provided on the two side walls of the first mounting groove between the two side portions of the mechanism base can limit the axial movement of the jump buckle along the axis of the jump buckle shaft, and the limiting grooves can limit the rotation stroke of the jump buckle.

[0010] Further, the limiting groove is a sector-shaped limiting groove.

[0011] Further, the linkage part is an arc-shaped open groove on the jump buckle.

[0012] In one embodiment, the reset torsion spring is sleeved on the jump buckle, one end is placed in the connecting groove on the jump buckle, and the other end is placed on the clamping groove on the mechanism base.

[0013] In one embodiment, the mechanism base is integral or split.

[0014] Further, the mechanism base includes an upper side wall portion and a lower side wall portion, and the upper side wall portion and the lower side wall portion are assembled together through the convex posts and countersinks thereon to form the mechanism base.

[0015] Beneficial Effects

[0016] A circuit breaker structure for reducing the tripping force provided by the present utility model includes a connecting rod. One end of the connecting rod is linked with the operating handle, and the other end of the connecting rod is linked with the two side portions of the mechanism base and the linkage part on the jump buckle, so that the force received at the other end of the connecting rod is dispersed to the two side portions of the mechanism base and the jump buckle, reducing the tripping force required for the operating mechanism to trip, improving the operation stability of the product, and reducing the risk of the product slipping the buckle. At the same time, during the movement of the operating mechanism, the contact surfaces between the connecting rod and the jump buckle and the two side portions of the mechanism base are adaptively adjusted, reducing the wear of the upper and lower walls of the mechanism base and the torsional deformation of the mechanism, and prolonging the service life of the product. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Att Figure 1 is a schematic diagram of the double-contact circuit breaker in the open state in Embodiment 1 of the present invention;

[0019] Att Figure 2 is a schematic diagram of the double-contact circuit breaker in the closed state in Embodiment 1 of the present invention;

[0020] Att Figure 3It is a schematic diagram of the double - contact circuit breaker in the tripped state in Embodiment 1 of the present invention;

[0021] Appendix Figure 4a It is a three - dimensional schematic diagram of the connecting rod connected to the mechanism base and the trip latch in Embodiment 1 of the present invention;

[0022] Appendix Figure 4b It is a schematic diagram of the connecting rod connected to the mechanism base and the trip latch in Embodiment 1 of the present invention;

[0023] Appendix Figure 5a It is a schematic diagram of the upper side wall part in Embodiment 1 of the present invention Figure 1 ;

[0024] Appendix Figure 5b It is a schematic diagram of the upper side wall part in Embodiment 1 of the present invention Figure 2 ;

[0025] Appendix Figure 6a It is a schematic diagram of the lower side wall part in Embodiment 1 of the present invention Figure 1 ;

[0026] Appendix Figure 6b It is a schematic diagram of the lower side wall part in Embodiment 1 of the present invention Figure 2 ;

[0027] Appendix Figure 7 It is a schematic diagram of the mechanism base in Embodiment 1 of the present invention;

[0028] Appendix Figure 8a It is a schematic diagram of the trip latch in Embodiment 1 of the present invention Figure 1 ;

[0029] Appendix Figure 8b It is a schematic diagram of the trip latch in Embodiment 1 of the present invention Figure 2 ; Detailed implementation manners

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of them. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0031] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are only for illustrative purposes and do not represent the only implementation.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first feature is in direct contact with the second feature, or the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is lower than that of the second feature.

[0034] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific implementations and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0035] Embodiment 1

[0036] As shown in the appendix Figure 1, as shown in FIGS. 2, 3, and 4, a circuit breaker structure for reducing the tripping force includes a connecting rod 1. One end of the connecting rod 1 is linked with the operating handle 2. Among them, the other end of the connecting rod 1 is linked with the two side parts of the mechanism base 3 and the linkage part 401 on the tripping latch 4, so that the force on the other end of the connecting rod 1 is dispersed to the two side parts of the mechanism base 3 and the tripping latch 4, reducing the tripping force required for the operating mechanism to trip, improving the operating stability of the product, and reducing the risk of the product slipping the latch. At the same time, during the movement of the operating mechanism, the contact surfaces between the connecting rod and the tripping latch and the two side parts of the mechanism base are adjusted adaptively, reducing the wear of the upper and lower walls of the mechanism base and the torsional deformation of the mechanism.

[0037] The specific structure is as shown in FIG. 4. One end of the connecting rod 1 is inserted into the connecting hole 101 on the operating handle 2. The other end of the connecting rod 1 is inserted through the kidney-shaped hole 301 on one side part of the mechanism base 3, passes through the linkage part 401 on the tripping latch 4, and then enters the kidney-shaped hole 302 on the other side part of the mechanism base 3. The connecting rod moves in the kidney-shaped hole, and the force-bearing positions of the connecting rod are located at the joints with the two side parts of the mechanism base and the middle tripping latch at three places, effectively reducing the force borne by the tripping latch, thereby effectively reducing the tripping force of the product;

[0038] As shown in the attached Figure 1 , as shown in FIGS. 2 and 3, the tripping latch 4 is rotatably installed in the installation groove 303 between the two side parts of the mechanism base 3 on the mechanism base 3. In this embodiment, the tripping latch 4 is rotatably installed in the installation groove 303 between the two side parts of the mechanism base 3 through the tripping latch shaft 5. The limiting grooves 303a provided on the two side walls of the installation groove 303 between the two side parts of the mechanism base 3 can limit the axial movement of the tripping latch 4 along the tripping latch shaft 5, and the limiting grooves 303a can limit the rotation stroke of the tripping latch 4. In this embodiment, the limiting groove 303a is a fan-shaped limiting groove.

[0039] As shown in the attached Figure 8a , as shown in FIGS. 8b, the linkage part 401 is an arc-shaped open groove on the tripping latch 4. The joint between the tripping latch and the connecting rod is an open U-shaped arc-shaped open groove structure, which is convenient for sharing the received force to the mechanism base. The return torsion spring 6 is sleeved on the tripping latch 4, with one end placed in the connecting groove 402 on the tripping latch 4 and the other end resting on the clamping groove 304 on the mechanism base 3. A convex stop 403 is provided on the tripping latch 4 for pre-installation limiting of the return torsion spring 8.

[0040] In this embodiment, as shown in the attached Figure 5a , as shown in FIGS. 5b, 6a, 6b, and 7, the mechanism base 3 is a split type. The mechanism base 3 includes an upper side wall part 3a and a lower side wall part 3b. The upper side wall part 3a and the lower side wall part 3b are assembled together through the convex columns 3c and the counterbores 3d on them to form the mechanism base 3.

[0041] The operating handle 2 pushes the connecting rod, and the connecting rod 1 drives the mechanism base 3 and the jumping buckle 4 to move synchronously. The forces exerted by the side walls on both sides of the mechanism base 3 on the connecting rod 1 are perpendicular to the wall of the mechanism base 3, and the force exerted by the jumping buckle 2 on the connecting rod 1 is perpendicular to the tangent of the U-shaped arc of the jumping buckle 4. The release force required for the release of the operating mechanism is reduced, the operation stability of the product is improved, and the risk of the product slipping the buckle is reduced. At the same time, during the movement of the operating mechanism, the contact surfaces between the connecting rod and the jumping buckle and the two sides of the mechanism base are adaptively adjusted, reducing the wear of the upper and lower walls of the mechanism base and the torsional deformation of the mechanism, and extending the service life of the product.

[0042] Embodiment 2

[0043] The mechanism base 3 is integrally formed. Other structures are the same as those in Embodiment 1.

[0044] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0045] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A circuit breaker structure for reducing the tripping force, which includes a connecting rod (1) and an operating handle (2), one end of the connecting rod (1) is linked with the operating handle (2), and is characterized in that: The other end of the connecting rod (1) is linked with the two side parts of the mechanism base (3) and the linkage part (401) on the jump latch (4), so that the force on the other end of the connecting rod (1) is dispersed to the two side parts of the mechanism base (3) and the jump latch (4).

2. The circuit breaker structure for reducing the tripping force according to claim 1, characterized in that: One end of the connecting rod (1) is inserted into the connecting hole (101) on the operating handle (2). The other end of the connecting rod (1) is inserted into the first kidney-shaped hole (301) on one side part of the mechanism base (3), passes through the linkage part (401) on the jump latch (4), and then enters the second kidney-shaped hole (302) on the other side part of the mechanism base (3).

3. The circuit breaker structure for reducing the tripping force according to claim 1, characterized in that: The jump latch (4) is rotatably installed in the first installation groove (303) located between the two side parts of the mechanism base (3).

4. The circuit breaker structure for reducing the tripping force according to claim 3, wherein: The jump latch (4) is rotatably installed in the first installation groove (303) between the two side parts of the mechanism base (3) through a jump latch shaft (5).

5. The circuit breaker structure for reducing the tripping force according to claim 4, characterized in that: The limiting grooves (303a) provided on the two side walls of the first installation groove (303) between the two side parts of the mechanism base (3) can limit the axial movement of the jump latch (4) along the jump latch shaft (5), and the limiting grooves (303a) can limit the rotation stroke of the jump latch (4).

6. The circuit breaker structure for reducing the tripping force according to claim 5, characterized in that: The limiting groove (303a) is a fan-shaped limiting groove.

7. The circuit breaker structure for reducing the tripping force according to claim 3, characterized in that: The linkage part (401) is an arc-shaped open groove on the jump latch (4).

8. A circuit breaker structure for reducing the tripping force according to claim 1, characterized in that: The return torsion spring (6) is sleeved on the jump latch (4), with one end placed in the connecting groove (402) on the jump latch (4) and the other end resting on the clamping groove (304) on the mechanism base (3).

9. A circuit breaker structure for reducing the tripping force according to claim 1, characterized in that: The mechanism base (3) is integral or split.

10. A circuit breaker structure for reducing the tripping force according to claim 9, characterized in that: The mechanism base (3) includes an upper side wall part (3a) and a lower side wall part (3b). The upper side wall part (3a) and the lower side wall part (3b) are assembled together through the convex posts (3c) and the counterbores (3d) on them to form the mechanism base (3).

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