Frame type circuit breaker chassis structure

Abstract

A frame type circuit breaker chassis structure comprises a chassis and a safety door installed on the front face of the chassis, the safety door can be driven by a pressing plate to move left and right on the front face of the chassis, and the frame type circuit breaker chassis structure is characterized in that a boss is arranged on the side face, facing the safety door, of the chassis, and the safety door is installed on the boss and can move left and right; the position, corresponding to the safety door, of the boss is an arc surface, the position, corresponding to the boss, of the safety door is a plane, and the boss and the safety door are in tangent contact with the plane through an arc. According to the whole structure, the installation characteristics of the chassis, the safety door and the pressing plate are improved, abrasion of the safety door is reduced, the stability of left-right movement of the safety door is improved, clamping stagnation between the safety door and the chassis is avoided, the machining difficulty of the safety door and the chassis is reduced, and the matching strength between the chassis and the safety door is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, and specifically relates to a frame-type circuit breaker chassis structure. Background Art

[0002] Circuit breakers come in a variety of designs depending on their performance requirements. Drawer-type frame circuit breakers are a common design used in the low-voltage electrical industry. They primarily consist of a circuit breaker body and a drawer housing. When the circuit breaker requires maintenance or other operations, the body must be removed from the drawer housing, separating it from the main circuit. To ensure operator safety, a safety door is installed between the circuit breaker body and the main circuit to prevent electric shock. This door must also be able to open when the circuit breaker body and the main circuit need to be connected. In existing safety door systems, the circuit breaker body is installed in a drawer housing. In existing circuit breaker drawer housings, a pressure plate is the primary actuator, driving the safety door left and right. However, the safety door and the base frame in existing systems have a retaining structure at their base, generating significant friction during movement, which can cause the safety door to become stuck. Furthermore, the base frame lacks other structures to interact with the safety door, resulting in significant friction between the safety door and the pressure plate, leading to severe wear and tear on the safety door. Utility Model Content

[0003] The purpose of the present utility model is to address the defect that the chassis structure of the existing frame-type circuit breaker causes serious wear of the safety door, and to provide a frame-type circuit breaker chassis structure, improve the installation features of the chassis with the safety door and the pressure plate, reduce the wear of the safety door, increase the stability of the safety door in the left and right movement, reduce the jamming between the safety door and the chassis, and reduce the difficulty of processing the safety door and the chassis.

[0004] Technical Solution

[0005] In order to achieve the above technical objectives, the present invention provides a frame-type circuit breaker chassis structure, which includes a chassis, a safety door mounted on the front of the chassis, and the safety door can move left and right on the front of the chassis under the drive of a pressure plate. The utility model is characterized in that a boss is provided on the side surface of the chassis facing the safety door, the safety door is mounted on the boss and can move left and right, the boss and the safety door corresponding to the arc surface, the safety door and the boss corresponding to the plane, and the boss and the safety door are in tangential contact between the arc and the plane.

[0006] In one embodiment, a guide limiting structure is provided at the bottom and / or top of the front side of the chassis to limit the forward and backward movement of the safety door.

[0007] In one embodiment, the boss is located in the middle of the front side of the chassis.

[0008] In one embodiment, an L-shaped boss groove is provided on the base frame, and the pressure plate is installed in the L-shaped boss groove.

[0009] In one embodiment, the L-shaped boss groove is located in the middle of the front side of the base frame.

[0010] In one embodiment, the L-shaped boss groove is connected to the boss, and a protruding end of the head of the L-shaped boss groove is connected to the tail end of the boss.

[0011] In one embodiment, the L-shaped boss groove and the boss are separate, and a partition groove is provided between the L-shaped boss groove and the boss.

[0012] Beneficial effects

[0013] The utility model provides a frame-type circuit breaker chassis structure, comprising a chassis, a safety door mounted on the front of the chassis, the safety door being capable of left and right movement on the front of the chassis driven by a pressure plate, a boss being provided on a side of the chassis facing the safety door, the safety door being mounted on the boss and capable of left and right movement, the boss being formed with an arc surface at a point corresponding to the safety door, the safety door being formed with a flat surface at a point corresponding to the boss, and the boss and the safety door being in tangential contact between the arc and the flat surface. The entire structure improves the mounting features of the chassis, the safety door, and the pressure plate, reduces wear on the safety door, increases the stability of the safety door's left and right movement, avoids jamming between the safety door and the chassis, reduces the difficulty of machining the safety door and chassis, and improves the strength of the fit between the chassis and the safety door. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Attachment Figure 1 This is a schematic diagram of the installation of the chassis and safety door in Example 1 of the present utility model;

[0016] Attachment Figure 2 This is a schematic diagram of the chassis structure in Example 1 of the present utility model. Figure 1 ;

[0017] Attachment Figure 3 This is a schematic diagram of the chassis structure in Example 1 of the present utility model. Figure 2 ;

[0018] Attachment Figure 4 This is a schematic diagram of the chassis structure in Example 2 of the present utility model; DETAILED DESCRIPTION

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] Example 1

[0025] The existing frame type circuit breaker chassis structure causes serious wear and tear on the safety door. In order to solve this technical problem, this embodiment provides a frame type circuit breaker chassis structure, as shown in the attached figure. Figure 1 As shown, it includes a base frame 1, a safety door 2 is installed on the front of the base frame 1, and the safety door 2 can move left and right on the front of the base frame 1 driven by a pressure plate 3. A guide limiting structure 101 is provided at the bottom and / or top of the front of the base frame 1 to limit the movement displacement of the safety door 2 in the forward and backward directions.

[0026] As attached Figure 2 and 3 As shown, a boss 102 is provided on the side surface of the base frame 1 facing the safety door 2. The boss 102 is preferably located in the middle of the front of the base frame 1. The safety door 2 is mounted on the boss 102 and can move left and right. The corresponding portion of the boss 102 and the safety door 2 is a circular arc surface, and the corresponding portion of the safety door 2 and the boss 102 is a plane. The boss 102 and the safety door 2 are in tangential contact between the arc and the plane. An L-shaped boss groove 103 is provided on the base frame 1, and the pressure plate 3 is mounted in the L-shaped boss groove 103. The L-shaped boss groove 103 is preferably located in the middle of the front of the base frame 1. The L-shaped boss groove 103 is connected to the boss 102, and the protruding end 103a of the head of the L-shaped boss groove 103 is connected to the tail end of the boss 102. This structure increases strength and facilitates processing.

[0027] Example 2

[0028] In this embodiment, as shown in the attached Figure 4 As shown, the L-shaped boss groove 103 is separate from the boss 102, and a partition groove 104 is provided between the L-shaped boss groove 103 and the boss 102. The boss 102 is associated with the movement of the safety door 2, while the L-shaped boss groove 103 is associated with the movement of the pressure plate 3. The L-shaped boss groove 103 and the boss 102 are separate, facilitating the separate adjustment of the two functions. The rest of the structure is the same as in Example 1.

[0029] The utility model provides a frame-type circuit breaker chassis structure, which improves the installation features of the chassis with the safety door and the pressure plate, reduces the wear of the safety door, increases the stability of the safety door in left and right movement, avoids the jamming between the safety door and the chassis, reduces the processing difficulty of the safety door and the chassis, and improves the matching strength between the chassis and the safety door.

[0030] 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.

[0031] 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 frame-type circuit breaker chassis structure, comprising a chassis (1), a safety door (2) mounted on the front of the chassis (1), the safety door (2) being capable of moving left and right on the front of the chassis (1) driven by a pressure plate (3), and characterized in that: A boss (102) is provided on one side of the base frame (1) facing the safety door (2); the safety door (2) is mounted on the boss (102) and can move left and right; the corresponding portion between the boss (102) and the safety door (2) is an arc surface; the corresponding portion between the safety door (2) and the boss (102) is a plane; the boss (102) and the safety door (2) are in tangential contact between the arc and the plane.

2. A frame-type circuit breaker chassis structure according to claim 1, characterized in that: A guide limiting structure (101) is provided at the front bottom and / or top of the chassis (1) to limit the front-back movement displacement of the safety door (2).

3. The frame-type circuit breaker chassis structure according to claim 1, characterized in that: The boss (102) is located in the middle of the front side of the base frame (1).

4. The frame-type circuit breaker chassis structure according to claim 1, characterized in that: An L-shaped boss groove (103) is provided on the base frame (1), and the pressing plate (3) is installed in the L-shaped boss groove (103).

5. The frame-type circuit breaker chassis structure according to claim 4, characterized in that: The L-shaped boss groove (103) is located in the middle of the front side of the base frame (1).

6. The frame-type circuit breaker chassis structure according to claim 4, characterized in that: The L-shaped boss groove (103) is connected to the boss (102), and an end portion (103a) protruding from the head of the L-shaped boss groove (103) is connected to the tail end of the boss (102).

7. The frame type circuit breaker chassis structure according to claim 4, characterized in that: The L-shaped boss groove (103) and the boss (102) are split, and a partition groove (104) is provided between the L-shaped boss groove (103) and the boss (102).

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