Sliding type mounting structure for counter-force spring of circuit breaker

Abstract

A circuit breaker counterforce spring sliding type installation structure comprises a counterforce spring, the counterforce spring is installed in a space defined by a mechanism base and a shell, one end of the counterforce spring abuts against the shell, the other end of the counterforce spring abuts against a spring installation part on the mechanism base, and the counterforce spring is installed in the space. And the spring can slide on the spring mounting part. The connection mode of the counter-force spring and the end, opposite to the mechanism base, of the circuit breaker is set to be sliding connection, the counter-force spring can slide on the spring limiting face of the mechanism base, application under the condition of a large-rotation-angle mechanism is achieved, installation is easy, and the installation error-tolerant rate is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, and specifically relates to a sliding installation structure of a circuit breaker reaction spring. Background Art

[0002] Miniature circuit breakers, as one of the essential electrical components of the circuit, play a role in control and protection in the power system. Circuit breakers mainly include conductive systems, arc extinguishing systems, operating mechanisms, etc. The trip unit is an important part of the circuit breaker operating mechanism. The reaction spring of existing miniature circuit breakers is installed on the mechanism seat. During the movement, the mechanism seat will drive the spring to rotate together, and the pressure on the spring will cause the spring to rotate. When the large-angle mechanism moves, the reaction spring will bend and deform due to excessive vertical displacement, reducing the energy storage effect of the reaction spring, or even completely making the reaction spring lose its function.

[0003] Chinese patent CN 218069760 U discloses a fast-tripping circuit breaker, including a housing, a handle and a tripping mechanism, wherein the tripping mechanism includes a contact seat, a lock and a force storage spring, wherein one end of the force storage spring is connected to the housing and the other end is connected to the contact seat, and the force storage spring has an elastic force that forces the contact seat to rotate to complete the tripping action. This technology requires the contact seat to passively adapt to the movement of the reaction spring, and the required pressure of the reaction spring is relatively large, which is not suitable for miniature circuit breakers. Utility Model Content

[0004] The purpose of the utility model is to provide a sliding installation structure for a reaction force spring of a circuit breaker in view of the defect that the above-mentioned existing reaction force spring cannot be applied to the movement of a large-angle mechanism. The connection mode between the reaction force spring and the end opposite to the mechanism seat of the circuit breaker is set to a sliding connection. The reaction force spring can slide on the spring limiting surface of the mechanism seat, thereby achieving applicability under large-angle mechanism conditions and simple installation, and a high installation fault tolerance rate.

[0005] Technical Solution

[0006] In order to achieve the above technical purpose, the utility model provides a circuit breaker reaction spring sliding installation structure, which includes a reaction spring, and the reaction spring is installed in the space surrounded by the mechanism seat and the shell, and is characterized in that one end of the reaction spring abuts against the shell, and the other end abuts against the spring installation part on the mechanism seat, and can slide on the spring installation part.

[0007] In one embodiment, the spring mounting portion includes a closing constraint portion and an opening constraint portion, and the closing constraint portion and the opening constraint portion are connected via an intermediate transition portion.

[0008] In one embodiment, the other end of the reaction spring is located at the closing constraint part, the intermediate transition part, and the opening constraint part respectively when the circuit breaker is in the closing state, the intermediate state between closing and opening, and the opening state.

[0009] In one embodiment, the closing constraint part and the opening constraint part are planes, and the intermediate transition part is an arc surface.

[0010] In one embodiment, the closing constraint part, the intermediate transition part, and the opening constraint part are connected in sequence to form an arc surface.

[0011] In one embodiment, a limiting boss is provided at a position corresponding to the reaction spring on the mechanism base, and the limiting boss and the groove on the housing form a space for installing the reaction spring. During installation, the reaction spring can be directly compressed and inserted between the housing and the spring installation part and limited by the limiting boss, and the installation form is simpler.

[0012] Beneficial effects

[0013] The present utility model provides a sliding installation structure for the reaction spring of a circuit breaker. A sliding installation structure for the reaction spring of a circuit breaker includes a reaction spring. The reaction spring is installed in the space enclosed by the mechanism base and the housing. One end of the reaction spring abuts against the housing, and the other end abuts against the spring installation part on the mechanism base and can slide on the spring installation part. The connection mode of the reaction spring with the opposite end of the circuit breaker mechanism base is set as a sliding connection. The reaction spring can slide on the spring limiting surface of the mechanism base, realizing applicability under the condition of a large-angle mechanism and simple installation with a relatively high installation error tolerance. Brief description of the drawings

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore 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.

[0015] Attached Figure 1 is a schematic diagram of the reaction spring installation structure in the embodiment of the present utility model.

[0016] Attached Figure 2 is a schematic diagram of the position of the reaction spring when the circuit breaker is in the opening position in the embodiment of the present utility model.

[0017] Attached Figure 3 is a schematic diagram of the reaction spring when the circuit breaker is in the intermediate position between closing and opening in the embodiment of the present utility model.

[0018] AttachedFigure 4 It is a schematic diagram of the position of the reaction spring when the circuit breaker is in the closing position in the embodiment of the present utility model.

[0019] Appendix Figure 5 It is a schematic diagram of the structure of the mechanism base in the embodiment of the present utility model. Specific embodiments

[0020] 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 some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0021] 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 can 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 description of the present application are only for the purpose of illustration and do not represent the only implementation manner.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood 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 the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0023] In the present application, unless otherwise clearly specified and limited, 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 and the second feature are indirectly in contact 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 less than that of the second feature.

[0024] Unless otherwise defined, all technical and scientific terms used in the specification of this application shall have the same meaning as commonly understood by those skilled in the technical field to which this application pertains. The terms used in the specification of this application are for the purpose of describing specific embodiments only 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.

[0025] Embodiment

[0026] As shown in the Figure 1 accompanying drawings, a sliding mounting structure for the reaction spring of a circuit breaker includes a reaction spring 1, which is installed in the space enclosed by the mechanism base 2 and the housing 3. One end of the reaction spring 1 abuts against the housing 3, and the other end abuts against the spring mounting portion 201 on the mechanism base 2 and can slide on the spring mounting portion 201.

[0027] As shown in the Figure 5 accompanying drawings, the spring mounting portion 201 includes a closing constraint portion 201a and a tripping constraint portion 201b, and the closing constraint portion 201a and the tripping constraint portion 201b are connected by an intermediate transition portion 201c.

[0028] As shown in the Figure 2 accompanying drawings, Figures 3 and 4, the other end of the reaction spring 1 is located at the closing constraint portion 201a, the intermediate transition portion 201c, and the tripping constraint portion 201b respectively in the closing state, the intermediate state between closing and tripping, and the tripping state of the circuit breaker. The closing constraint portion 201a and the tripping constraint portion 201b are planes, and the intermediate transition portion 201c is an arc surface. The closing constraint portion 201a, the intermediate transition portion 201c, and the tripping constraint portion 201b are connected in sequence to form an arc surface. The existence of these surfaces not only enables the reaction spring 1 to have higher stability and installation error tolerance during the closing and tripping processes; at the same time, it also reduces the displacement of the reaction spring 1 in the vertical direction during operation, making it not easily bent and deformed, and increasing the service life of the mechanism.

[0029] As shown in the Figure 5 accompanying drawings, a limiting boss 202 is provided at the position on the mechanism base 2 corresponding to the reaction spring 1 to prevent the reaction spring 1 from sliding in the non-force direction. The limiting boss 202 and the groove 301 on the housing 3 form the space for installing the reaction spring 1. During installation, the reaction spring 1 can be directly compressed and inserted between the housing 3 and the spring mounting portion 201 and limited by the limiting boss 202, and the installation form is simpler. During the entire closing and tripping movement process, the mechanism base 2 gradually compresses / releases the reaction spring 1 in this groove 301, causing the reaction spring 1 to reciprocate in this groove.

[0030] During the entire closing process, the movement of the handle 4 drives the movement of the trip latch 5, the lock latch 6, and the mechanism base 2. The reaction spring 1, which was originally at its normal stretched length, is gradually compressed. At the same time, one end of the trip restraint portion 201b, which was originally in place, gradually transitions to the arc surface of the intermediate transition portion 201c due to the rotation of the mechanism base; and then transitions to the closing restraint portion 201a during the gradual compression process, after which the mechanism is locked. The opening process is the same. One end of the reaction spring 1 gradually transitions from the closing restraint portion 201a to the opening restraint portion 201b, completing the entire movement process.

[0031] A sliding mounting structure of the reaction spring of a circuit breaker provided in this embodiment sets the connection method between the reaction spring and the opposite end of the mechanism base of the circuit breaker as a sliding connection. The spring limiting surface of the reaction spring mechanism base can slide, achieving applicability under the condition of a large-angle mechanism, avoiding large offsets of the spring in a non-spring linear direction caused by excessive mechanism rotation angle, resulting in spring bending deformation, and enabling the mechanism to better match a mechanism with a larger rotation angle. Moreover, the installation is simple and the installation error tolerance is relatively high.

[0032] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described 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 described in this specification.

[0033] The above-described embodiments merely represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limitations 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 modifications 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 sliding installation structure of a reaction spring for a circuit breaker, which comprises a reaction spring (1), and the reaction spring (1) is installed in the space enclosed by a mechanism base (2) and a housing (3), and is characterized in that: One end of the reaction spring (1) abuts against the housing (3), and the other end abuts against the spring mounting portion (201) on the mechanism base (2) and can slide on the spring mounting portion (201).

2. The sliding mounting structure of the reaction spring of a circuit breaker according to claim 1, characterized in that: The spring mounting portion (201) includes a closing restraint portion (201a) and a tripping restraint portion (201b), and the closing restraint portion (201a) and the tripping restraint portion (201b) are connected by an intermediate transition portion (201c).

3. The sliding installation structure of the reaction spring of a circuit breaker according to claim 2, characterized in that: The other end of the reaction spring (1) is located at the closing restraint portion (201a), the intermediate transition portion (201c), and the tripping restraint portion (201b) in the closed state, the intermediate state between closing and tripping, and the tripped state of the circuit breaker, respectively.

4. The sliding mounting structure of the reaction spring of a circuit breaker according to claim 2 or 3, characterized in that: The closing restraint portion (201a) and the tripping restraint portion (201b) are planes, and the intermediate transition portion (201c) is an arc surface.

5. The sliding installation structure of the reaction spring of a circuit breaker according to claim 4, characterized in that: The closing restraint portion (201a), the intermediate transition portion (201c), and the tripping restraint portion (201b) are connected in sequence to form an arc surface.

6. The sliding mounting structure of the reaction spring of a circuit breaker according to claim 1, wherein: A limiting boss (202) is provided at a position corresponding to the reaction spring (1) on the mechanism base (2), and the limiting boss (202) and the groove (301) on the housing (3) constitute a space for mounting the reaction spring (1).

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