Structure for adjusting contact spring of universal circuit breaker

Abstract

A structure for adjusting a contact spring of a universal circuit breaker comprises a moving contact, the moving contact is installed in a base of the circuit breaker, an operating mechanism of the circuit breaker can drive the moving contact to rotate, and the moving contact can make contact with and be separated from a static contact in the rotating process so as to control on-off of a circuit where the circuit breaker is located. The moving contact is characterized in that the contact support of the moving contact is provided with an operation hole which can be used for adjusting the position of the contact spring. The contact spring can be adjusted through the operation hole to prevent the contact spring from deflecting, and after adjustment is completed, the housing and the contact support are installed together to prevent foreign matters from entering a moving contact system.

Description

Technical Field

[0001] The utility model belongs to a circuit breaker, and specifically relates to a contact spring adjustment structure for a universal circuit breaker. Background Art

[0002] Circuit breakers are crucial equipment in low-voltage power distribution systems. As power system requirements continue to rise, so too are the performance requirements for circuit breaker protection switches. Miniaturization, high performance, modularization, and high reliability are the current trends in circuit breaker development. The contact system is a core component of the circuit breaker, and the contact spring parameters and final contact pressure within the contact system are directly related to the circuit breaker's short-time withstand performance.

[0003] The existing moving contact system of a universal circuit breaker includes a moving contact piece, contact spring, contact support, clamping plate, and shaft. The contact spring is located between the mounting slot on the contact support and the groove of the moving contact piece. The moving contact of a universal circuit breaker is composed of several contact pieces connected in parallel. The contact and separation of the moving contact and static contact control the connection and disconnection of the circuit. Each contact piece is provided with a final pressure by one or two contact springs. Universal circuit breakers are usually arranged with double rows of contact springs to provide final pressure for the contact pieces. With double rows of contact springs, it is often difficult to observe whether the contact springs near the inner row are properly assembled. If they are not properly assembled, it will cause deviation in the final contact pressure, affecting the performance of the circuit breaker. Utility Model Content

[0004] The purpose of the present utility model is to address the defect of the above-mentioned existing universal circuit breaker that it is impossible to observe whether a row of contact springs inside are assembled in place, and to provide a contact spring adjustment structure for a universal circuit breaker. The contact spring can be adjusted through the contact operation hole to prevent the contact spring from deflecting. After the adjustment is completed, the cover and the contact support are installed together to prevent foreign matter from entering the moving contact system.

[0005] Technical Solution

[0006] To achieve the above technical objectives, the present invention provides a universal circuit breaker contact spring adjustment structure, comprising a moving contact mounted within a base of the circuit breaker. The moving contact is driven by an operating mechanism of the circuit breaker to rotate. During rotation, the moving contact can contact and separate from a stationary contact, thereby controlling the on / off state of the circuit breaker. The structure is characterized in that an operating hole is provided on the contact support of the moving contact for adjusting the position of the contact spring.

[0007] In one embodiment, the operating holes are arranged in grooves on both sides of the contact support.

[0008] In one embodiment, a protrusion is provided on the cover corresponding to the groove, and the protrusion is inserted into the groove.

[0009] In one embodiment, a plurality of movable contact pieces are rotatably mounted on a clamping plate via a movable contact piece shaft, a contact support and a clamping plate are fixed together, a spring mounting groove is provided on the contact support, one end of a contact spring is mounted in the spring mounting groove, and the other end abuts against the inner side of the plurality of movable contact pieces.

[0010] In one embodiment, the cover is placed outside the plurality of movable contact pieces and fixedly mounted together with the contact support.

[0011] Beneficial effects

[0012] The utility model provides a universal circuit breaker contact spring adjustment structure, comprising a movable contact mounted within the circuit breaker base. The movable contact is driven by an operating mechanism of the circuit breaker to rotate. During rotation, the movable contact can contact and separate from a stationary contact, thereby controlling the on / off state of the circuit breaker. The utility model is characterized in that an operating hole is provided on the contact support of the movable contact to adjust the position of the contact spring. The operating hole allows adjustment of the contact spring to prevent deflection. After adjustment, a cover is mounted together with the contact support to prevent foreign matter from entering the movable contact system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0014] Attachment Figure 1 It is a schematic diagram of a moving contact product in an embodiment of the present utility model.

[0015] Attachment Figure 2 It is a schematic diagram of a contact support product in an embodiment of the present utility model.

[0016] Attachment Figure 3 This is a schematic diagram of the installation of the contact spring in the embodiment of the present utility model.

[0017] Attachment Figure 4 It is a schematic diagram of a cover product in an embodiment of the present utility model. DETAILED DESCRIPTION

[0018] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0019] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0021] In this application, unless otherwise expressly specified or limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or that the first feature and the second feature are indirectly in contact through an intermediate medium. Furthermore, a first feature being “above,” “above,” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below,” “below,” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0022] 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 art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments 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 relevant listed items.

[0023] Example

[0024] Universal circuit breakers are equipped with double rows of contact springs to provide final pressure for the contact pieces. For double rows of contact springs, it is often difficult to observe whether the contact springs near the inner row are properly assembled. If they are not properly assembled, it will cause deviation in the final contact pressure, affecting the performance of the circuit breaker. In order to solve this problem, this embodiment provides a universal circuit breaker contact spring adjustment structure, as shown in the attached figure. Figure 1 As shown, it includes a moving contact 1, wherein a plurality of moving contact pieces 104 in the moving contact 1 are rotatably mounted on a clamping plate 106 via a moving contact piece shaft 105, a contact support 101 and the clamping plate 106 are fixed together, a spring mounting groove 101c is provided on the contact support 101, and one end of a contact spring 102 is mounted in the spring mounting groove 101c. In one embodiment, as shown in the attached Figure 4 The cover 103 shown is placed outside the plurality of movable contact pieces 104 and fixedly assembled with the contact support 101 .

[0025] The moving contact 1 is installed in the base of the circuit breaker. The operating mechanism of the circuit breaker can drive the moving contact 1 to rotate. During the rotation process, the moving contact 1 can contact and separate with the static contact to achieve on-off control of the circuit where the circuit breaker is located. The contact support 101 of the moving contact 1 is provided with an operating hole 101a, which can be used to adjust the position of the contact spring 102.

[0026] As attached Figure 2 As shown in FIG. 1 , in this embodiment, the operating holes 101a are arranged in the grooves 101b on both sides of the contact support 101. The cover 103 is provided with protrusions 103a at positions corresponding to the grooves 101b, and the protrusions 103a are inserted into the grooves 101b. Figure 3 As shown, after the contact spring 102 is placed in the spring installation groove 101c and the contact system is assembled, the contact spring 102 can be visually checked through the operation hole 101a to see if it is installed in place and whether there is any deflection. If there is deflection, a tool can be used to use the space of the operation hole 101a to move the contact spring to adjust the position of the contact spring 102. After the contact spring 102 is adjusted, the cover 103 is assembled, and as shown in the attached Figure 4 The protrusion 103a on the cover 103 shown is assembled with the groove 101b on the contact support 101 to prevent foreign matter from falling into the contact spring. The operating hole 101a can be of any shape that is convenient for operation or observation.

[0027] The utility model provides a universal circuit breaker contact spring adjustment structure. The contact spring can be adjusted through the operating hole 101a to prevent the contact spring from deflecting. After the adjustment is completed, the cover and the contact support are installed together to prevent foreign matter from entering the moving contact system.

[0028] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0029] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A structure for adjusting the contact spring of a universal circuit breaker, comprising a movable contact (1), the movable contact (1) being mounted in a base of the circuit breaker, the operating mechanism of the circuit breaker being capable of driving the movable contact (1) to rotate, the movable contact (1) being capable of contacting and separating with a static contact during the rotation process, thereby realizing on-off control of the circuit in which the circuit breaker is located, characterized in that: An operating hole (101a) is provided on the contact support (101) of the movable contact (1) and can be used to adjust the position of the contact spring (102).

2. The universal circuit breaker contact spring adjustment structure according to claim 1, characterized in that: The operating holes (101a) are arranged in the grooves (101b) on both sides of the contact support (101).

3. The universal circuit breaker contact spring adjustment structure according to claim 2, characterized in that: A protrusion (103a) is provided on the cover shell (103) at a position corresponding to the groove (101b), and the protrusion (103a) is inserted into the groove (101b).

4. The universal circuit breaker contact spring adjustment structure according to claim 1, characterized in that: A plurality of movable contact pieces (104) are rotatably mounted on a clamping plate (106) via a movable contact piece shaft (105); a contact support (101) and a clamping plate (106) are fixedly mounted together; a spring mounting groove (101c) is provided on the contact support (101); one end of a contact spring (102) is mounted in the spring mounting groove (101c), and the other end abuts against the inner sides of the plurality of movable contact pieces (104).

5. The universal circuit breaker contact spring adjustment structure according to claim 4, characterized in that: The cover (103) is placed outside the plurality of movable contact pieces (104) and fixedly mounted together with the contact support (101).

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