Circuit breaker base with stepped splicing structure

Abstract

The utility model relates to a circuit breaker base of a stepped splicing structure, the circuit breaker base comprises a base body and an upper cover correspondingly arranged above the base body, the outer edge of the base body protrudes upwards to form stepped limiting structures, the stepped limiting structures are arranged in a layered mode, and the stepped limiting structures descend layer by layer from inside to outside. The surfaces of the inner sides of the step limiting structures abut against the upper cover. A butt joint structure penetrating through the upper cover extends upwards from the position, located on the inner side of the stepped limiting structure, of the top wall of the base body, the butt joint structure comprises an elastic sealing ring, the vertical section of the sealing ring is circular, the center of the side, close to the base body, of the sealing ring abuts against the base body, and gaps are reserved between the two sides of the side, close to the base body, of the sealing ring and the base body. The side, opposite to the base body, of the sealing ring abuts against the upper cover, and the side, corresponding to the abutting face of the sealing ring, of the upper cover is obliquely and symmetrically arranged on the inner side and the outer side of the sealing ring. According to the invention, the circuit breaker is assembled in a step assembling manner, and the sealing performance is effectively improved to cope with the effect of a floating dust environment.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of circuit breakers, in particular to a circuit breaker base of a stepped splicing structure. BACKGROUND

[0002] The plastic shell circuit breaker is widely applied to low-voltage power distribution, and functions to timely trip and disconnect the circuit to protect the power supply and load when a fault occurs in the circuit. The shell of a general plastic shell circuit breaker is composed of a base and a shell cover, the two ends of the base are provided with nut mounting grooves (the cross section of the nut mounting groove is a regular hexagon) matched with the outer shape of hexagonal nuts, and the wiring panel is fixed on the base through cooperation of the screws and the hexagonal nuts arranged in the nut mounting grooves.

[0003] The design cannot tightly fit the base and the upper cover through fastening of the screws only, and in some factory dust environments, dust can enter the circuit breaker from the gap, causing abnormal operation of the circuit breaker. In view of the related technologies in the above, the applicant proposes a circuit breaker assembled in a stepped splicing form, which effectively improves the sealing performance and deals with the dust environment. CONTENT OF THE UTILITY MODEL

[0004] In order to make the circuit breaker assembled in a stepped splicing form, effectively improve the sealing performance and deal with the dust environment, the application provides a circuit breaker base of a stepped splicing structure.

[0005] The circuit breaker base of the stepped splicing structure provided by the application adopts the following technical scheme:

[0006] The circuit breaker base of the stepped splicing structure comprises a base body and an upper cover arranged above the base body, the outer edge of the base body is upwardly protruded to form a stepped limiting structure, the stepped limiting structure is arranged in layers, and the stepped limiting structure gradually decreases from the inside to the outside layer by layer, and the surface of the inner side of the stepped limiting structure abuts against the upper cover; the top wall of the base body is upwardly extended to the inner side of the stepped limiting structure, and the butt joint structure penetrating the upper cover is arranged on the top wall, the butt joint structure comprises a sealing ring with elasticity, the vertical section of the sealing ring is circularly arranged, the center of the side of the sealing ring close to the base body abuts against the base body, the two sides of the side of the sealing ring close to the base body are spaced apart from the base body, the side of the sealing ring opposite to the base body abuts against the upper cover, and the abutting surface of the upper cover corresponding to the sealing ring is obliquely and symmetrically arranged on the inner and outer sides of the sealing ring.

[0007] By adopting the technical scheme, the center of the sealing ring close to the base body side abuts against the base body, can produce appropriate deformation when under pressure, thereby better filling the tiny gap between the base body and the upper cover, providing excellent sealing effect, preventing external dust, moisture and the like from entering the internal circuit, improving the protection level of the equipment, and the design of the stepped limiting structure enables the upper cover to be intuitively aligned with the base body during installation, reducing the time and difficulty of manual adjustment, and effectively dispersing the deformation of the shell caused by external force, enhancing durability.

[0008] Preferably, the docking structure further comprises a plug-in pin fixed to the upper end wall of the base and extending upward, and the plug-in pin is located on the inner side of the stepped limiting structure and is plugged into the upper cover; a downward extending collapse groove is formed on the top wall of the plug-in pin, the sealing ring close to the base body side is accommodated in the collapse groove, and the sealing ring close to the upper cover side protrudes from the plug-in pin.

[0009] Preferably, the docking structure further comprises a connecting bracket accommodated and fixed to the bottom wall of the collapse groove, the sealing ring close to the base body side is fixed to the connecting bracket and is arranged in a staggered manner on both sides of the sealing ring, and a gap is left between the sealing ring close to the base body side and the bottom wall of the collapse groove.

[0010] By adopting the technical scheme, the connecting bracket is fixed on the bottom wall of the collapse groove, and the sealing ring close to the base body side is fixed to the connecting bracket and arranged in a staggered manner on both sides. This design ensures that the sealing ring can better collapse when under pressure, avoids the loss of elasticity of the sealing ring, and the inner angle formed by the inclined surface of the top wall of the plug-in pin is greater than 90 degrees and less than 180 degrees, which can make the sealing ring form multiple abutments and enhance the sealing performance, while leaving a collapse space for the sealing ring.

[0011] Preferably, the top wall of the plug-in pin extends downward along the center of symmetry, the upper cover forms inclined surfaces downward on both sides corresponding to the top wall of the plug-in pin, and the sealing ring is abutted on both sides of the inclined surfaces respectively.

[0012] Preferably, the inner angle formed by the inclined surface of the top wall of the plug-in pin is greater than 90 degrees and less than 180 degrees.

[0013] Preferably, the stepped limiting structure comprises a stepped limiting plate and a friction surface, the stepped limiting plate is fixed to the upper end outer ring of the base body and extends upward, the stepped limiting plate is arranged layer by layer and descends layer by layer from outside to inside, and the upper cover is accommodated and arranged in a shape corresponding to the stepped limiting plate; the friction surface is arranged on the side wall on the inner side of the stepped limiting plate and abuts against the upper cover.

[0014] By adopting the above technical scheme, the stepped limiting plate is fixed to the outer circle of the upper end of the base body and extends upward, is arranged layer by layer and descends layer by layer from outside to inside. The multi-layer structure ensures that the upper cover can be accurately aligned during installation, and each layer of the limiting plate can provide effective support to prevent the upper cover from being displaced or shaken during use, thereby enhancing the stability of the overall structure. The existence of the friction surface increases the friction between the upper cover and the limiting plate, effectively prevents the upper cover from loosening when subjected to vibration or impact, and improves the reliability of the connection.

[0015] In summary, the present application includes at least one of the following beneficial technical effects:

[0016] The center of the sealing ring close to the base body abuts against the base body, which can produce appropriate deformation when under pressure, thereby better filling the small gap between the base body and the upper cover, providing excellent sealing effect, preventing external dust, moisture and the like from entering the internal circuit, improving the protection level of the equipment, and the stepped limiting structure design enables the upper cover to be intuitively aligned with the base body during installation, reducing the time and difficulty of manual adjustment, and effectively dispersing the deformation of the shell caused by external force, enhancing durability.

[0017] The connecting bracket is fixed to the bottom wall of the collapse groove, and the side of the sealing ring close to the base body is fixed to the connecting bracket and is arranged in a staggered manner. This design ensures that the sealing ring can better collapse when under pressure, avoiding loss of elasticity of the sealing ring. The inner angle formed by the inclined surface of the top wall of the plug-in pin is greater than 90 degrees and less than 180 degrees, which can make the sealing ring form multiple abutments and enhance the sealing performance, while leaving a collapse space for the sealing ring.

[0018] The stepped limiting plate is fixed to the outer circle of the upper end of the base body and extends upward, is arranged layer by layer and descends layer by layer from outside to inside. The multi-layer structure ensures that the upper cover can be accurately aligned during installation, and each layer of the limiting plate can provide effective support to prevent the upper cover from being displaced or shaken during use, thereby enhancing the stability of the overall structure. The existence of the friction surface increases the friction between the upper cover and the limiting plate, effectively prevents the upper cover from loosening when subjected to vibration or impact, and improves the reliability of the connection. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of an embodiment of the present application;

[0020] Figure 2 is a partial sectional view of an embodiment of the present application;

[0021] Figure 3 is a schematic diagram of the hidden upper cover of an embodiment of the present application.

[0022] Explanation of reference signs: 1, base body; 2, upper cover; 3, stepped limiting structure; 31, stepped limiting plate; 32, friction surface; 4, butt joint structure; 41, sealing ring; 42, plug-in pin; 43, connecting bracket; 5, collapse groove. DETAILED DESCRIPTION

[0023] The application will be further described in detail below with reference to the accompanying drawings.

[0024] The application discloses a circuit breaker base of stepped splicing structure, referring to Figure 1 , 2 , comprising a base body 1 and an upper cover 2 arranged above the base body 1, the outer edge of the base body 1 is upwardly protruding to form a stepped limiting structure 3, the stepped limiting structure 3 comprises a stepped limiting plate 31 and a friction surface 32, the stepped limiting plate 31 is fixed to the outer circle of the upper end of the base body 1 and extends upwardly, the stepped limiting plate 31 is arranged layer by layer and descends layer by layer from outside to inside, the upper cover 2 is accommodated and arranged corresponding to the shape of the stepped limiting plate 31, so that the stress between the upper cover 2 and the stepped limiting plate 31 is released layer by layer, and the combination of the two is more compact.

[0025] Referring to Figure 2 , 3 , the top wall of the base body 1 extends upwardly on the inner side of the stepped limiting plate 31 and is provided with a butt joint structure 4 penetrating the upper cover 2, the butt joint structure 4 comprises a sealing ring 41 and a plug-in pin 42, the plug-in pin 42 is fixed to the upper end wall of the base body and extends upwardly, and the plug-in pin 42 is located on the inner side of the stepped limiting structure 3, the plug-in pin 42 is plugged into the upper cover 2, so that the upper cover 2 and the base body 1 form a stable butt joint relationship, and cooperate with the stepped limiting plate 31 to realize better sealing; the top wall of the plug-in pin 42 is formed with a downwardly extending collapse groove 5, the sealing ring 41 is accommodated in the collapse groove 5 on the side close to the base body 1, the sealing ring 41 protrudes from the plug-in pin 42 on the side close to the upper cover 2, and the vertical cutting surface of the sealing ring 41 is circularly arranged and has elasticity.

[0026] Referring to Figure 2 , 3 , the connecting bracket 43 is accommodated and fixed to the bottom wall of the collapse groove 5, the sealing ring 41 is fixed to the connecting bracket 43 on the side close to the base body 1 and is arranged in a staggered manner on both sides of the sealing ring 41, and a gap is left between the side of the sealing ring 41 close to the base body 1 and the bottom wall of the collapse groove 5; when the sealing ring 41 is extruded from the upper cover 2, it can collapse towards the gap of the collapse groove 5, so as to avoid generating a large abutting force on the upper cover 2.

[0027] Referring to Figure 2 , 3The top wall of the plug pin 42 extends downward along the center symmetry, the upper cover 2 corresponds to the top wall of the plug pin 42 to form a downward inclined surface towards both sides, and the sealing ring 41 is respectively abutted on both sides of the inclined surface, so that the sealing ring 41 and the upper cover 2 form multiple abutment points, and the sealing effect is better; the inner angle formed by the inclined surface of the top wall of the plug pin 42 is greater than 90 degrees and less than 180 degrees, so that the direction of the pressure of the sealing ring 41 on the upper cover 2 is more close to downward, and the sealing ring 41 is collapsed towards the gap of the collapse groove 5.

[0028] The implementation principle of the present application is that: the upper cover 2 can be abutted on the edge of the base body 1 through the plug pin 42, so that the stepped limiting plate 31 is closely attached to the upper cover 2, the gap is avoided, the multiple edges increase the connection length between the inside and outside, the dust is avoided to enter, and the friction surface 32 increases the friction force between the base body 1 and the upper cover 2, so that the gap is not easily generated due to the separation of the two by external force after assembly.

[0029] Meanwhile, the sealing ring 41 can be closely attached to the upper cover 2, and multiple abutment points are generated through the abutment surface arranged in an inclined manner, so that the sealing property is enhanced.

[0030] The above are the preferred embodiments of the present application, and are not limited to the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A circuit breaker base with a stepped splicing structure, comprising a base body (1) and an upper cover (2) disposed above the corresponding base body (1), characterized in that: The outer edge of the base body (1) protrudes upward to form a stepped limiting structure (3). The stepped limiting structure (3) is arranged in layers, and the stepped limiting structure (3) descends layer by layer from the inside to the outside. The inner side of the stepped limiting structure (3) abuts against the upper cover (2). The top wall of the base body (1) extends upward from the inner side of the stepped limiting structure (3) and has a connecting structure (4) that passes through the upper cover (2). The connecting structure (4) includes an elastic sealing ring (41). The vertical cross-section of the sealing ring (41) is circular. The center of the sealing ring (41) near the base body (1) abuts against the base body (1). There is a gap between the two sides of the sealing ring (41) near the base body (1) and the base body (1). The sealing ring (41) abuts against the upper cover (2) on the side opposite to the base body (1), and the upper cover (2) side corresponds to the abutting surface of the sealing ring (41) and is inclined and symmetrically arranged on the inner and outer sides of the sealing ring (41).

2. The circuit breaker base with a stepped splicing structure according to claim 1, characterized in that: The docking structure (4) also includes a plug pin (42), which is fixed to the upper end wall of the base and extends upward. The plug pin (42) is located inside the stepped limiting structure (3) and is inserted into the upper cover (2). The top wall of the plug pin (42) has a downward extending collapse groove (5). The sealing ring (41) is accommodated in the collapse groove (5) on the side near the base body (1) and protrudes from the plug pin (42) on the side near the upper cover (2).

3. The circuit breaker base with a stepped splicing structure according to claim 2, characterized in that: The docking structure (4) also includes a connecting bracket (43), which is accommodated and fixed to the bottom wall of the collapse groove (5). The sealing ring (41) is fixed to the connecting bracket (43) on the side near the base body (1) and is offset from both sides of the sealing ring (41). A gap is left between the side of the sealing ring (41) near the base body (1) and the bottom wall of the collapse groove (5).

4. The circuit breaker base with a stepped splicing structure according to claim 2, characterized in that: The top wall of the pin (42) extends downward symmetrically along the center, and the top cover (2) forms a downward sloping surface on both sides corresponding to the top wall of the pin (42). The sealing ring (41) abuts against the two sloping surfaces on both sides respectively.

5. A circuit breaker base with a stepped splicing structure according to claim 4, characterized in that: The internal angle formed by the inclined surface of the top wall of the insertion pin (42) is greater than 90 degrees and less than 180 degrees.

6. The circuit breaker base with a stepped splicing structure according to claim 1, characterized in that: The stepped limiting structure (3) includes a stepped limiting plate (31) and a friction surface (32). The stepped limiting plate (31) is fixed to the upper outer ring of the base body (1) and extends upward. The stepped limiting plate (31) is set layer by layer and descends layer by layer from the outside to the inside. The upper cover (2) accommodates and is set in accordance with the shape of the stepped limiting plate (31). The friction surface (32) is respectively set on the side wall of the inner side of the stepped limiting plate (31) and abuts against the upper cover (2).

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