CN216054542U

CN216054542U - Operating mechanism of circuit breaker

Info

Publication number: CN216054542U
Application number: CN202122604959.4U
Authority: CN
Inventors: 陈玉兵; 张洵初; 顾建青
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-03-15
Anticipated expiration: 2031-10-28

Abstract

An operating mechanism of a circuit breaker belongs to the technical field of low-voltage electrical appliances. Operating device includes support, link assembly, jumps and detains and energy storage spring, and the handle lever swing sets up on the support, jumps to detain and rotates the setting on the support, and link assembly includes first connecting rod and second connecting rod, and the one end of first connecting rod is articulated with the main shaft, and the other end is articulated through articulated axle with the one end of second connecting rod, and the other end swing of second connecting rod supports and leans on to jump to detain, and articulated shaft, other end connection handle lever, characteristics are connected to energy storage spring one end: the energy storage spring at least comprises a first tension spring and a second tension spring which are nested with each other. The advantages are that: the energy of the energy storage springs is improved by the at least two energy storage springs in a nesting mode, the space inside the circuit breaker occupied by the energy storage springs is not enlarged, the circuit breaker is suitable for the development of the performance of the circuit breaker, and the miniaturization trend of the circuit breaker is considered.

Description

Operating mechanism of circuit breaker

Technical Field

The utility model belongs to the technical field of low-voltage electric appliances, and particularly relates to an operating mechanism of a circuit breaker.

Background

As an important component of a circuit system, a circuit breaker can automatically break a circuit when a fault such as overload, short circuit, undervoltage and the like occurs in a circuit, prevent an accident from being enlarged, and ensure safe operation, so that the circuit breaker has been more and more widely applied. The existing thermomagnetic circuit breaker generally comprises a thermal overload release which is composed of bimetallic elements and realizes overload long-time delay protection and an electromagnetic release which is in the form of an electromagnet and realizes transient short-circuit protection, and when abnormal current in a circuit is detected, the release acts to actuate the circuit breaker to release so as to cut off a fault circuit.

The operating mechanism with the free tripping can realize the closing or opening of the contact through manual operation, the required action is accurate and reliable, the free tripping can be realized when overload and short circuit occur, and the breaking speed is irrelevant to the position of the handle.

The miniaturization design of the circuit breaker brings more compact space size of the operating mechanism. However, the performance of circuit breakers is improved in the hope that the operating mechanism of the circuit breaker will store more and more energy. Those skilled in the art are troubled by how to increase the energy of the energy storage spring of the operating mechanism and also by considering the space of the energy storage spring.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an operating mechanism of a circuit breaker, wherein an energy storage spring on the operating mechanism improves the energy of the energy storage spring in a nesting mode, does not enlarge the space inside the circuit breaker occupied by the energy storage spring, is suitable for the development of the performance of the circuit breaker, and also considers the trend of miniaturization of the circuit breaker.

The utility model aims to achieve the aim that the operating mechanism of the circuit breaker comprises a bracket, a connecting rod assembly, a jump buckle and an energy storage spring; the support on the swing be provided with the handle lever, the support on rotate and be provided with and jump and detain, link assembly include first connecting rod and second connecting rod, the one end of first connecting rod articulated with the main shaft of circuit breaker, the other end with the one end of second connecting rod pass through the articulated shaft articulated, the other end swing of second connecting rod support and lean on jump and detain, energy storage spring one end connect the articulated shaft, the handle lever is connected to the other end, energy storage spring at least including nested first extension spring and second extension spring each other.

In a specific embodiment of the utility model, the first tension spring comprises a first spring body and first hooks positioned at two ends of the first spring body; the second extension spring include the second spring body and be located the second couple at second spring body both ends.

In another specific embodiment of the utility model, the second spring body is located inside the first spring body.

In yet another specific embodiment of the present invention, the second hook is located inside the first hook.

In another specific embodiment of the present invention, the first hook and the second hook are both arc-shaped.

In a further specific embodiment of the present invention, the hinge shaft is provided with a journal portion, and the first hook and the second hook at one end of the first tension spring and the second tension spring are hooked and matched with the journal portion.

In a more specific embodiment of the present invention, the journal portion is a circular arc-shaped recess.

In yet another specific embodiment of the present invention, the handle lever includes a pair of side portions spaced apart from each other and a top cover portion communicating with the pair of side portions; the top cap portion on be equipped with couple groove and couple hole, the couple groove with the couple hole be used for jointly realizing with the cooperation of colluding of first couple, the second couple of the first extension spring and the second extension spring other end.

In yet another specific embodiment of the present invention, the hook hole is a through hole, and the hook groove is an open groove with one open end.

In a further specific embodiment of the present invention, a pair of the side portions is further provided with a pushing portion for driving the jump buckle to swing on a side away from the hook groove.

The energy storage spring at least comprises a first tension spring and a second tension spring which are mutually nested, so that the energy of the energy storage spring is changed into the sum of the energy of the first tension spring and the energy of the second tension spring, and the energy of the energy storage spring is improved; meanwhile, the first tension spring and the second tension spring are combined together in a nested mode, so that the volume of only one first tension spring is actually occupied, the space inside the circuit breaker occupied by the energy storage spring is saved, the circuit breaker is suitable for the development of the performance of the circuit breaker, and the miniaturization trend of the circuit breaker is considered.

Drawings

Fig. 1 shows a schematic view of the cooperation of an operating mechanism, a main shaft and a movable contact according to the present invention.

Fig. 2 shows a schematic side view of the operating mechanism, the main shaft and the movable contact according to the present invention.

Fig. 3 shows a schematic view of a hinge shaft according to the present invention.

Fig. 4 shows a schematic view of an energy storage spring assembly according to the present invention.

Fig. 5 shows a schematic view of a handle lever according to the present invention.

In the figure: 1. the operating mechanism comprises an operating mechanism, 11, a bracket, 12, a handle lever, 121, a side part, 1211, an abutting groove, 122, a top cover part, 1221, a hook groove, 1222, a hook hole, 123, a pushing part, 13, a connecting rod component, 131, a first connecting rod, 132, a second connecting rod, 133, a hinge shaft, 1331, a shaft neck part, 14, a jump buckle, 15, a first locking part, 16, a second locking part, 17, an energy storage spring, 171, a first tension spring, 1711, a first spring body, 1712, a first hook, 172, a second tension spring, 1721, a second spring body, 1722 and a second hook; 2. a main shaft; 3. moving contact.

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 is not intended to limit the technical solutions, and any changes in form and not essential to the inventive concept should be regarded as the protection scope of the present invention.

In the following description, any concept related to the directionality (or the directional nature) of up, down, left, right, front, and rear is intended to facilitate understanding by the public, and thus should not be construed as particularly limiting the technical solution provided by the present invention, with respect to the position state in which the drawings are being described.

As shown in fig. 1, the circuit breaker includes a housing, an operating mechanism 1, a main shaft 2 and a contact system, wherein the contact system includes a moving contact 3 and a fixed contact, the operating mechanism 1 is installed on the housing, the main shaft 2 is rotatably disposed in the housing, the moving contact 3 is installed in the main shaft 2, and the fixed contact is installed on the housing. The moving contact 3 is in contact fit with the fixed contact to realize the closing and opening of the circuit breaker.

The operating mechanism 1 is an energy component, and is used for driving the main shaft 2 to move, and when the main shaft 2 is driven, the main shaft 2 drives the moving contact 3 therein to move, so that the moving contact 3 is contacted with or separated from the fixed contact.

The handle is arranged above the operating mechanism 1, and when an operator pushes the handle, the operating mechanism 1 can be driven to perform closing, opening and re-buckling actions.

Referring to fig. 2, the operating mechanism 1 includes a bracket 11, a handle lever 12, a link assembly 13, a jumper 14, a first locking member 15, a second locking member 16, and an energy storage spring 17.

The bracket 11 is a metal frame, which serves as a base for mounting and positioning other components of the operating mechanism 1. Specifically, the handle lever 12 is arranged on the bracket 11 in a swinging manner. The jump buckle 14 is rotatably arranged on the bracket 11. One end of the connecting rod component 13 is abutted against the jump buckle 14, the other end of the connecting rod component is hinged with the main shaft 2, and the connecting rod component 13 is two connecting rods which are hinged through a hinge shaft. The first locking member 15 and the second locking member 16 are rotatably disposed on one side of the bracket 11, the first locking member 15 is used for being snap-fitted with the jumper 14, and the second locking member 16 is used for being snap-fitted with the first locking member 15. One end of the energy storage spring 17 is connected with the hinged shaft on the connecting rod component 13, and the other end is connected with the handle lever 12.

Specifically, the link assembly 13 includes a first link 131, a second link 132, and a hinge shaft 133. The first link 131 and the second link 132 are hinged by the hinge shaft 133. One end of the first link 131 is hinged to the main shaft 2, the other end of the first link 131 is hinged to one end of the second link 132 through the hinge shaft 133, the other end of the second link 132 abuts against the jump buckle 14, and the second link 132 and the jump buckle 14 can swing relatively.

As shown in fig. 3, the hinge shaft 133 is generally a circular shaft, and is preferably made of a metal material to secure rigidity thereof. A shaft neck part 1331 is arranged in the middle of the hinge shaft 133, and the shaft neck part 1331 is a circular arc-shaped recess. The energy storage spring 17 is a tension spring assembly. The journal portion 1331 is used for hooking one end of the energy storage spring 17.

As shown in fig. 4, the energy storage spring 17 includes a first extension spring 171 and a second extension spring 172. The first tension spring 171 and the second tension spring 172 form the energy storage spring 17 in a nested manner. Of course, two extension springs are illustrated in the present embodiment, but the present invention should be construed as having at least two, for example, three or four, of these extension springs, so long as at least two of these extension springs are nested to cooperate with each other.

The first tension spring 171 includes a first spring body 1711 and first hooks 1712 at two ends of the first spring body 1711. Similarly, the second tension spring 172 includes a second spring 1721 and second hooks 1722 at two ends of the second spring 1721.

The first extension spring 171 has a size larger than that of the second extension spring 172. The second spring 1721 is disposed inside the first spring 1711, such that the first spring 171 and the second spring 172 form a nested engagement.

Of course, to facilitate installation, the second hook 1722 is located inside the first hook 1712. Preferably, the first hook 1712 and the second hook 1722 are both arc-shaped.

Referring to fig. 5, the handle lever 12 is typically a machined piece of sheet metal. The steel is usually manufactured by bending and punching.

The handle lever 12 includes a pair of side portions 121 spaced apart from each other and a top cover portion 122 communicating with the pair of side portions 121. The top cover portion 122 is located on the top of the handle lever 12, so that the handle lever 12 is substantially n-shaped. The lower ends of the pair of side portions 121 are provided with abutting cavities 1211, and the abutting cavities 1211 are used for abutting against the bracket 11, so that the handle lever 12 can swing relative to the bracket 11.

The top cover part 122 is provided with a hook groove 1221 and a hook hole 1222, and the hook groove 1221 and the hook hole 1222 are mutually matched, so as to be commonly used for realizing the hooking and matching with the first hook 1712 and the second hook 1722.

Specifically, the hook hole 1222 is a through hole, and the hook groove 1221 is an open groove with one open end. The first hook 1712 and the second hook 1722 extend into the top cover 122 from the hook slot 1221 along the extending direction of the hook slot 1221, and the hook tips of the first hook 1712 and the second hook 1722 hook the hook hole 1222. Thus, the hooking and hooking engagement between the first hook 1712 and the second hook 1722 and the handle lever 12 is completed. And the other pair of the first hook 1712 and the second hook 1722 are hooked with the journal portion 1331 of the hinge shaft 133.

The pair of side portions 121 are further provided with pressing portions 123 for swinging the jump buttons 14 on a side away from the hook grooves 1221, and preferably, the pair of pressing portions 123 are formed by bending.

In this embodiment, since the energy storage spring 17 at least includes the first tension spring 171 and the second tension spring 172, the energy of the energy storage spring 17 is changed to the sum of the energies of the first tension spring 171 and the second tension spring 172, so as to increase the energy of the energy storage spring 17. Meanwhile, the first tension spring 171 and the second tension spring 172 are combined together in a nested manner, so that the volume of only one first tension spring 171 is actually occupied, and therefore, the internal volume of the operating mechanism occupied by the energy storage spring 17 is saved, and the miniaturization of the circuit breaker is facilitated.

Claims

1. An operating mechanism of a circuit breaker comprises a bracket (11), a connecting rod assembly (13), a jump buckle (14) and an energy storage spring (17); support (11) on the swing be provided with handle lever (12), support (11) on rotate and be provided with jump and detain (14), link assembly (13) including first connecting rod (131) and second connecting rod (132), one end of first connecting rod (131) articulated with main shaft (2) of circuit breaker, the other end with the one end of second connecting rod (132) pass through articulated shaft (133) articulated, the other end swing of second connecting rod (132) support and lean on jump and detain (14) on, energy storage spring (17) one end connect articulated shaft (133), handle lever (12), its characterized in that are connected to the other end: the energy storage spring (17) at least comprises a first tension spring (171) and a second tension spring (172) which are nested with each other.

2. The operating mechanism of a circuit breaker as claimed in claim 1, wherein the first tension spring (171) comprises a first spring body (1711) and first hooks (1712) at two ends of the first spring body (1711); the second tension spring (172) comprises a second spring body (1721) and second hooks (1722) positioned at two ends of the second spring body (1721).

3. An operating mechanism for a circuit breaker according to claim 2 wherein said second spring (1721) is located inside said first spring (1711).

4. An operating mechanism of a circuit breaker according to claim 2 wherein said second hook (1722) is located inside said first hook (1712).

5. The operating mechanism of a circuit breaker as claimed in claim 2 wherein said first hook (1712) and said second hook (1722) are each arcuate.

6. The operating mechanism of a circuit breaker according to claim 2, wherein the hinge shaft (133) is provided with a shaft neck portion (1331), and the first hook (1712) and the second hook (1722) at one end of the first tension spring (171) and one end of the second tension spring (172) are hooked with the shaft neck portion (1331).

7. The operating mechanism of a circuit breaker according to claim 6 wherein said journal portion (1331) is a circular arc shaped depression.

8. The operating mechanism of a circuit breaker according to claim 2 wherein said handle lever (12) includes a pair of spaced apart side portions (121) and a top cover portion (122) communicating with said pair of side portions (121); the top cover portion (122) is provided with a hook groove (1221) and a hook hole (1222), the hook groove (1221) and the hook hole (1222) are jointly used for realizing the hooking and hanging matching of a first hook (1712) and a second hook (1722) at the other ends of the first tension spring (171) and the second tension spring (172).

9. The operating mechanism of a circuit breaker according to claim 8 wherein said hook hole (1222) is a through hole, and said hook slot (1221) is an open slot with an open end.

10. The operating mechanism of a circuit breaker according to claim 8 wherein a pair of said side portions (121) is further provided with a pushing portion (123) for swinging the jumper (14) on a side away from said hook groove (1221).