CN210489557U

CN210489557U - Circuit breaker

Info

Publication number: CN210489557U
Application number: CN201922046455.8U
Authority: CN
Inventors: 马雄杰; 陈斌; 王晖
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-05-08
Anticipated expiration: 2029-11-25

Abstract

A circuit breaker belongs to the technical field of low-voltage electrical appliances. The contact device comprises a base, a bottom plate, a mask, an operating mechanism and a contact system, wherein the base and the bottom plate are spliced to form a cavity for containing the contact system; the operating mechanism is arranged on the outer side of the base and is used for driving the contact system to carry out closing and opening actions; the mask is characterized in that the peripheral edge of the mask is fixed on the base, the mask covers the operating mechanism, an energy storage handle is installed on one side of the operating mechanism, the energy storage handle extends out of the mask and can rotate, a handle accommodating cavity for accommodating the energy storage handle is formed in the mask, and the bottom of the handle accommodating cavity is fixedly connected with the operating mechanism. The advantages are that: the deformation of the face shield caused by the impact of gas in the breaker is greatly reduced, the fixing reliability of the face shield is improved, and the face shield is prevented from cracking or being damaged.

Description

Circuit breaker

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, concretely relates to circuit breaker.

Background

The low-voltage universal circuit breaker is a component of low-voltage electrical equipment with large capacity, is mainly used in an industrial power system, and can ensure the connection and disconnection of a circuit under rated load and automatically disconnect the circuit under abnormal circuit conditions (such as overload, short circuit, undervoltage and the like), thereby completely isolating the load from a power supply.

As shown in fig. 1, a conventional circuit breaker mainly includes a housing, and an operating mechanism, a contact system, a controller, a shunt release, a closing electromagnet, an undervoltage release, an auxiliary switch, and other components installed in the housing. The casing include base 1, bottom plate 2 and face guard 3, bottom plate 2 be fixed in on 1 one side of base and form 3 ~ 4 chambeies with base 1, set up a set of contact system in every chamber, be N, A, B, C looks (three-pole circuit breaker does not have N looks) of circuit breaker respectively. The operating mechanism, the controller, the shunt release, the closing electromagnet, the undervoltage release and the auxiliary switch are covered by the face shield 3 on the other side of the base 1, namely, the face shield 3 is fixed on the other side of the base 1.

With the continuous development of circuit breakers, the circuit breakers are required to have smaller volume and larger breaking capacity. In the current circuit breaker structure, the face shield 3 is generally fixed along the peripheral edge of the outer side by a plurality of screws 4, for example, in a common structure, a plurality of screws 4 are used to fix three edges of the periphery of the face shield 3, and the face shield 3 is installed on the base 1 by the screws 4, that is, the fixing position between the face shield 3 and the base 1 is located at the periphery of the face shield 3. During the breaking process of the circuit breaker, an electric arc is formed between contacts, high local air pressure is quickly formed in each cavity formed by the base 1 and the bottom plate 2, and high air pressure is also formed inside the face shield 3 after the air overflows and applies high pressure to the face shield 3. The higher the breaking capacity and the smaller the volume of the circuit breaker, the higher the pressure is, which may cause the cracking and even the damage of the weak part on the face mask 3, thereby affecting the insulation performance of the circuit breaker.

In view of the above-mentioned prior art, there is a need for a reasonable improvement of the housing structure of the existing circuit breaker. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

Disclosure of Invention

The utility model aims to provide a circuit breaker, bottom and operating device fixed connection through the handle installation cavity with the face guard to improve the fixed reliability of face guard, improve the circuit breaker performance.

The utility model discloses a task is accomplished like this, a circuit breaker, including base, bottom plate, face guard, operating device and contact system, the base with form the appearance chamber that is used for holding the contact system after the bottom plate splices; the operating mechanism is arranged on the outer side of the base and is used for driving the contact system to carry out closing and opening actions; the peripheral edge of face guard fixes on the base, the face guard covers operating device, install the energy storage handle on one side of operating device, the energy storage handle lean out the face guard and rotatable, the face guard on be equipped with the handle that supplies the energy storage handle holding and hold the chamber, the bottom and the operating device fixed connection in chamber are held to the handle.

The utility model discloses a concrete embodiment, the energy storage handle include one section and supply the operator to pull the swing end of operation, the handle hold the bottom in chamber have and supply the energy storage handle to lean out and the open hole of pivoted and the corresponding diapire of swing end with the energy storage handle, the handle has seted up the fixed orifices on holding the diapire in chamber, the circuit breaker still includes screw I, screw I visits the fixed orifices after twist on operating device.

In another specific embodiment of the present invention, the operating mechanism includes a pair of side plates, a fixing member is disposed on the side plates, the fixing member includes a fixing portion for aligning with the fixing hole, the fixing portion is provided with a fastening hole, and the screw i is inserted into the fastening hole.

In another specific embodiment of the present invention, the fixing member is directly formed by processing the side plate, or the fixing member and the side plate are separately manufactured and then assembled together.

In another specific embodiment of the present invention, the fixing member and the side plate are separately manufactured and then installed together, the fixing member includes a connecting portion for connecting with the side plate, and the fixing member is fixedly installed on the side plate through the connecting portion.

In yet another embodiment of the present invention, the fixing member is formed by bending a portion of the side plate outward.

In yet another specific embodiment of the present invention, the fastening hole is riveted with a rivet nut.

The utility model discloses a more and a concrete embodiment, the circuit breaker still include controller, electric operating mechanism, shunt excitation module, under-voltage module, combined floodgate module, supplementary module, the face guard include face guard and upper cover down, lower face guard cover operating mechanism, controller and electric operating mechanism, upper cover shunt excitation module, under-voltage module, combined floodgate module and supplementary module.

In yet another specific embodiment of the present invention, an air outlet is additionally formed at the bottom of the face mask.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: the bottom of a handle accommodating cavity for accommodating the energy storage handle is fixedly connected with an operating mechanism, and the handle accommodating cavity is positioned in the middle of the circuit breaker, so that a fixing part of a mask is additionally arranged in the middle of the circuit breaker, and thus, the deformation of the mask caused by the impact of gas in the circuit breaker can be greatly reduced, the fixing reliability of the mask is improved, and the mask is prevented from cracking or being damaged; secondly, the fixing part on the operating mechanism is simple in structure, easy to process and convenient to install at the bottom of the handle accommodating cavity.

Drawings

Fig. 1 is a schematic view illustrating the assembly of a circuit breaker case according to the prior art.

Fig. 2 is the assembly schematic of the circuit breaker housing of the present invention.

Fig. 3 is the internal structure schematic diagram of the circuit breaker of the present invention.

Figure 4 is the inside schematic view after the face guard split of circuit breaker.

Fig. 5 is a schematic front view of a mask of the circuit breaker of the present invention.

Fig. 6 is a schematic view of the reverse side of the face shield of the circuit breaker of the present invention.

Fig. 7 is a schematic front view of the lower mask of the circuit breaker of the present invention.

Fig. 8 is a schematic reverse side view of the lower face cover of the circuit breaker of the present invention.

Fig. 9 is a schematic front view of the upper cover of the circuit breaker of the present invention.

Fig. 10 is a schematic reverse side view of the lower face cover of the circuit breaker of the present invention.

Fig. 11 is an assembly diagram of an embodiment of an operating mechanism of the circuit breaker of the present invention.

Fig. 12 is an exploded view of an embodiment of an operating mechanism of the circuit breaker of the present invention.

Fig. 13 is a schematic view of a fixing member in an embodiment of an operating mechanism of a circuit breaker according to the present invention.

Fig. 14 is an assembly view of another embodiment of the operating mechanism of the circuit breaker of the present invention.

Fig. 15 is a schematic side plate diagram of another embodiment of the operating mechanism of the circuit breaker of the present invention.

In the figure: 1. a base; 2. a base plate; 3. the mask comprises a mask body, a mask 301, a lower mask 302, an upper mask 31, a mounting hole 32, a fixing hole 33, a handle accommodating cavity 331, an opening hole 332, a bottom wall 332 and an air outlet hole 34; 4. a screw; 5. the energy storage device comprises an operating mechanism, 51, a fixing piece, 511, a connecting part, 5111, a connecting hole, 512, a fixing part, 5121, a fastening hole, 52, a side plate, 53, an energy storage handle and 531, a swinging end; 6. a controller; 7. an electric operating mechanism; 8. a shunt module; 9. an undervoltage module; 10. a closing module; 11. twice connector assembly; 12. an auxiliary module; 100. a gasket; 200. a screw II; 300. screw I.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments by the applicant is not intended to limit the technical solutions, and any changes made according to the present invention rather than the essential changes should be considered as the protection scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the position shown in the corresponding fig. 2, and thus, should not be interpreted as a specific limitation to the technical solution provided by the present invention.

As shown in fig. 2, fig. 3 and fig. 4, the utility model relates to a circuit breaker, including casing, operating device 5, contact system, explosion chamber and other spare parts, the casing include base 1, bottom plate 2 and face guard 3, one side fixed connection of bottom plate 2 and base 1 and both splice the back and form the appearance chamber that is used for holding contact system, explosion chamber. The inner cavity of the face mask 3 covers one side of the base 1, and the peripheral edge of the face mask 3 is fixedly connected with one side of the base 1. The operating mechanism 5 is used for driving the contact system to perform closing and opening actions, an energy storage handle 53 is installed on one side of the operating mechanism 5, and the energy storage handle 53 is used for storing energy for the operating mechanism 5 so as to provide action energy for the operating mechanism 5. The operating mechanism 5 is fixedly arranged in the base 1, and an energy storage handle 53 on the operating mechanism can extend out of the mask 3 and can rotate.

As shown in fig. 3 and 4, the circuit breaker further includes a controller 6, an electric operating mechanism 7, a shunt module 8, an undervoltage module 9, a closing module 10, a double connector 11, and an auxiliary module 12. Operating device 5, controller 6, electric operating device 7, shunt excitation module 8, undervoltage module 9, closing module 10, twice connector 11, supplementary module 12 all fixed mounting be in base 1 on, face guard 3 installs on base 1 and covers operating device 5, controller 6, electric operating device 7, shunt excitation module 8, undervoltage module 9, closing module 10 and supplementary module 12. The face mask 3 can be one part or two parts. When the face mask 3 is formed by assembling two parts, the face mask 3 is divided into an upper face mask 302 and a lower face mask 301 which are arranged up and down. The upper cover 302 and the lower cover 301 are spliced to form the whole mask 3. Wherein the lower cover 301 covers the operating mechanism 5, the controller 6 and the electric operating mechanism 7. The upper cover 302 covers the shunt module 8, the undervoltage module 9, the closing module 10 and the auxiliary module 12.

As shown in fig. 2 to 10, the mask 3 is fixed to the base 1 by screws 4. Specifically, the peripheral edge of the face shield 3 is provided with a mounting hole 31, and the screw 4 is screwed into the base 1 after penetrating through the mounting hole 31, so that the face shield 3 is fixed on one side of the base 1. More specifically, the mounting holes 31 are formed at the bottom edge and both sides of the mask 3. Since the secondary connector 11 is attached to the upper portion of the base 1, the mounting hole 31 cannot be opened at a position corresponding to the secondary connector 11, that is, at the top of the face shield 3. As shown in fig. 5, two mounting holes 31 are formed at the bottom edge of the face mask 3, and two mounting holes 31 are formed at the left and right sides of the face mask 3, respectively. As shown in fig. 7, 9 and 10, when the face mask 3 is composed of an upper face mask 302 and a lower face mask 301, the mounting holes 31 are distributed on the upper face mask 302 and the lower face mask 301. Specifically, two mounting holes 31 are formed in the bottom edge of the lower face cover 301, and one mounting hole 31 is formed in each of the left side and the right side of the lower face cover 301; the left side and the right side of the upper face shield 302 are respectively provided with a mounting hole 31. With this arrangement, when the face mask 3 is composed of the upper face mask 302 and the lower face mask 301, the mounting holes 31 are uniformly distributed on the upper face mask 302 and the lower face mask 301, so that the upper face mask 302 and the lower face mask 301 can be fixed to each other with a satisfactory fixing effect.

As shown in fig. 5 to 8, the vent holes 34 are additionally formed at the bottom of the face mask 3, so that the gas generated inside the circuit breaker can be discharged to the outside of the circuit breaker through the vent holes 34, and the gas pressure received by the face mask 3 can be reduced.

As shown in fig. 2 to 8, the mask 3 is provided with a handle accommodating chamber 33 for accommodating the energy storage handle 53 of the operating mechanism 5. After the mask 3 is installed, the energy storage handle 53 is placed in the handle accommodating cavity 33, and an operator can pull out the energy storage handle 53 from the handle accommodating cavity 33 and press down the energy storage handle 53 to complete energy storage. The energy storage handle 53 comprises a swing end 531 for the operator to pull, and the bottom of the handle accommodating cavity 33 is provided with an opening 331 for the energy storage handle 53 to protrude and rotate and a bottom wall 332 corresponding to the swing end 531 of the energy storage handle 53.

As shown in fig. 5 to 8, a fixing hole 32 is formed in the bottom wall 332 of the handle accommodating chamber 33. The function and the effect of the fixing hole 32 and the mounting hole 31 are consistent, and the mounting requirement of the screw I300 is met. Specifically, the screw i 300 penetrates through the fixing hole 32 and is screwed into the operating mechanism 5, so that the bottom of the handle accommodating cavity 33 is fixedly connected with the operating mechanism 5. Because the handle accommodating cavity 33 is positioned in the middle of the circuit breaker, the middle of the circuit breaker is equivalently provided with a fixing part of the face shield 3, so that the deformation of the face shield 3 caused by the impact of the gas in the circuit breaker can be greatly reduced. The fixing reliability of the face mask 3 is improved, and the face mask 3 is prevented from cracking or breaking. Of course, if the form of screw fastening is not adopted, for example, the mode of clamping and the like is adopted, the fixed installation connection with the operating mechanism 5 can be realized in the middle of the face mask 3.

As shown in fig. 11 to 15, a fixing member 51 is provided on the operating mechanism 5 in order to fit the fixing hole 32. The operating mechanism 5 includes a pair of side plates 52, and the pair of side plates 52 are located on both sides of the operating mechanism 5. The fixing member 51 is disposed on the side plate 52. The fixing member 51 may be formed by machining a part of the side plate 52, or may be a single component and mounted on the side plate 52, so that the manufacturing and mounting manner of the fixing member 51 will be described by the following two embodiments:

example 1

As shown in fig. 11, 12 and 13, the fixing member 51 of the present embodiment is manufactured and installed in the following manner: the fixing member 51 and the side plate 52 are separately manufactured and then assembled together. Specifically, the fixing member 51 is mounted on a side plate 52 adjacent to the charging handle 53 side. The fixing member 51 is a bent metal plate, but the fixing member 51 may be made of other materials to meet the performance requirement. The fixing member 51 includes a connecting portion 511 for connecting with the side plate 52 and a fixing portion 512 for aligning and fitting with the fixing hole 32. The fixing member 51 is fixedly mounted to the side plate 52 through the connection portion 511. More specifically, the connecting portion 511 is provided with a connecting hole 5111, and a screw ii 200 penetrates through a washer 100 and then penetrates through the connecting hole 5111 to be screwed into a corresponding threaded hole of the side plate 52, so as to mount the fixing member 51 on the side plate 52. The fixing portion 512 is provided with a fastening hole 5121, and since the thickness of the metal plate is limited, in order to improve the fastening effect, a rivet nut can be riveted to the fastening hole 5121. The screw 4 is inserted into the fastening hole 5121 after penetrating through the fixing hole 32, so that the mask 3 is fixedly mounted to the operating mechanism 5 at the handle receiving cavity 33.

Example 2

As shown in fig. 14 and 15, the fixing member 51 of the present embodiment is manufactured and installed in the following manner: the fixing member 51 is directly machined from the side plate 52, that is, the fixing member 51 belongs to a part of the side plate 52. Specifically, a part of the side plate 52 is bent outward to form the fixing member 51, the fixing member 51 also includes a fixing portion 512, a fastening hole 5121 is also formed in the fixing portion 512, the thickness of the fastening hole 5121 is limited due to the limited thickness of the side plate 52, and a rivet nut can be riveted to the fastening hole 5121 to improve the fastening effect. The screw i 300 penetrates through the fixing hole 32 and is screwed into the clinch nut on the fastening hole 5121, so that the mask 3 is fixedly mounted with the operating mechanism 5 at the handle accommodating cavity 33.

Claims

1. A circuit breaker comprises a base (1), a bottom plate (2), a mask (3), an operating mechanism (5) and a contact system, wherein the base (1) and the bottom plate (2) are spliced to form a cavity for containing the contact system; the operating mechanism (5) is arranged on the outer side of the base (1), and the operating mechanism (5) is used for driving the contact system to perform closing and opening actions; the method is characterized in that: the peripheral edge of face guard (3) is fixed on base (1), and face guard (3) cover operating device (5), install energy storage handle (53) on one side of operating device (5), energy storage handle (53) lean out face guard (3) and rotatable, face guard (3) on be equipped with the handle that supplies energy storage handle (53) holding and hold chamber (33), the bottom and operating device (5) fixed connection that the chamber (33) was held to the handle.

2. The circuit breaker according to claim 1, wherein the energy storage handle (53) comprises a swing end (531) for being pulled by an operator, the bottom of the handle accommodating chamber (33) is provided with an open hole (331) for the energy storage handle (53) to extend out and rotate and a bottom wall (332) corresponding to the swing end (531) of the energy storage handle (53), the bottom wall (332) of the handle accommodating chamber (33) is provided with a fixing hole (32), the circuit breaker further comprises a screw i (300), and the screw i (300) penetrates through the fixing hole (32) and is screwed into the operating mechanism (5).

3. A circuit breaker according to claim 2 wherein said operating mechanism (5) comprises a pair of side plates (52), said side plates (52) having a fixing member (51), said fixing member (51) having a fixing portion (512) for aligning with said fixing hole (32), said fixing portion (512) having a fastening hole (5121), said screw i (300) penetrating said fixing hole (32) and being screwed into said fastening hole (5121).

4. A circuit breaker according to claim 3 wherein said fixed member (51) is directly machined from said side plate (52), or said fixed member (51) and said side plate (52) are separately formed and then assembled together.

5. The circuit breaker according to claim 4, wherein the fixed member (51) and the side plate (52) are separately manufactured and then assembled together, the fixed member (51) includes a connection portion (511) for connecting with the side plate (52), and the fixed member (51) is fixedly installed on the side plate (52) through the connection portion (511).

6. A circuit breaker according to claim 4 wherein said mounting member (51) is formed by bending a portion of said side plate (52) outwardly.

7. A circuit breaker according to claim 3 wherein said fastening hole (5121) is riveted with a clinch nut.

8. The circuit breaker according to claim 1, characterized in that the circuit breaker further comprises a controller (6), an electric operating mechanism (7), a shunt module (8), an undervoltage module (9), a closing module (10) and an auxiliary module (12), the mask (3) comprises a lower mask (301) and an upper mask (302), the lower mask (301) covers the operating mechanism (5), the controller (6) and the electric operating mechanism (7), and the upper mask (302) covers the shunt module (8), the undervoltage module (9), the closing module (10) and the auxiliary module (12).

9. A circuit breaker as claimed in claim 1, characterized in that an air outlet (34) is provided in the bottom of the visor (3).