Molded case circuit breaker handle locking device

Abstract

The invention discloses a handle locking device for a molded case circuit breaker, comprising a circuit breaker housing and a handle, wherein the handle has an opening position and a closing position on the circuit breaker housing, the handle is a hollow structure, and its side has a strip-shaped perforation arranged along the height direction of the handle, and the handle is provided with a slider that can move up and down, an adjusting member that can be rotatably arranged at the top of the handle and is threadedly matched with the slider, and a stopper that is rotatably connected to the handle through a pin in the middle, the stopper is arranged at the strip-shaped perforation, and the hole on the stopper that is matched with the pin is a waist-shaped hole, the upper end of the stopper is hinged with the slider, the lower end of the stopper has a stopper head, and a card slot suitable for matching with the stopper head is provided on the circuit breaker housing at the opening position. The invention has a reasonable structure, is convenient for locking the handle at the opening position, and has good practicality.

Description

Technical Field

[0001] The invention relates to a handle locking device for a molded case circuit breaker and belongs to the field of structural design of molded case circuit breakers. Background Art

[0002] Molded case circuit breakers achieve the power on / off function of circuit breakers by turning the handle of the circuit breaker (switching between the closing position and the opening position). In order to prevent the handle of the circuit breaker from being accidentally turned during use, a handle locking device is usually provided. The most common use case is to lock the handle in the opening position when inspecting the load line to prevent uninformed personnel from turning the handle to the closing position to energize the line and cause a safety accident. The handle locking device in the prior art is mostly configured separately. When in use, the handle locking device is installed on the handle. This handle locking device needs to be carried by the maintenance personnel. However, in actual operation, the handle cannot be locked without carrying the handle locking device, and there are certain limitations in its use. Summary of the invention

[0003] In this regard, the present invention aims to provide a handle locking device for a molded case circuit breaker, which is convenient for locking the handle in an open position and has better practicality.

[0004] The technical solution for achieving the purpose of the present invention is:

[0005] A handle locking device for a molded case circuit breaker comprises a circuit breaker housing and a handle, wherein the handle has an opening position and a closing position on the circuit breaker housing, the handle is a hollow structure, and its side portion has a strip through-hole arranged along the height direction of the handle, the handle is provided with a slider that can move up and down, an adjusting member rotatably arranged at the top of the handle and threadedly matched with the slider, and a stop member rotatably connected to the handle through a pin shaft in the middle, the stop member is arranged at the strip through-hole, and the hole on the stop member that matches with the pin shaft is a waist-shaped hole, the upper end of the stop member is hinged with the slider, and the lower end of the stop member has a stop head, and a slot suitable for matching with the stop head is provided on the circuit breaker housing at the opening position, the slider is driven to move up and down by rotating the adjusting member, and then the stop member is driven to rotate around the pin shaft, so that the stop head retracts or extends out of the strip through-hole, and when the handle is in a locked state, the stop head extends out of the strip through-hole and is stuck in the slot.

[0006] In the above technical solution, the number of the strip-shaped perforations is two, which are respectively arranged on the left and right sides of the handle, and the number of the stopper and the card slot is correspondingly set to two.

[0007] In the above technical solution, the adjusting member is a bolt, and the head of the bolt is located outside the top end of the handle.

[0008] The present invention has positive effects: the handle locking device in the present invention has a reasonable structure. When in use, the handle is first turned to the off-gate position, and then the slider is driven to move downward by rotating the adjusting piece, and then the stopper is driven to rotate around the pin shaft, so that the stopper head extends outward from the strip-shaped perforation and is inserted into the slot. In this way, the handle can be locked in the off-gate position. When the handle is unlocked, the adjusting piece is rotated in the reverse direction to drive the slider to move upward, and then the stopper is rotated in the reverse direction around the pin shaft, so that the stopper head is retracted inward into the strip-shaped perforation. The locking and unlocking operations are convenient, the structure is optimized and reasonable, and there is no need to carry it separately, which has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of the handle locking device of the molded case circuit breaker in the present invention;

[0010] Figure 2 This is a diagram of the internal structure of the handle in the present invention.

[0011] The reference numerals shown in the figure are: 1-circuit breaker housing; 11-slot; 2-handle; 21-strip perforation; 3-slider; 4-adjusting member; 5-stop member; 51-waist-shaped hole; 52-stop head; 6-pin shaft; 7-circlip. DETAILED DESCRIPTION

[0012] The specific structure of the handle locking device of the molded case circuit breaker in the present invention is described below in conjunction with the accompanying drawings of the specification:

[0013] A handle locking device for a molded case circuit breaker, such as Figure 1 and Figure 2As shown, it includes a circuit breaker housing 1 and a handle 2, the handle 2 has an opening position and a closing position on the circuit breaker housing 1, the handle 2 is a hollow structure, and its side has a strip-shaped through hole 21 arranged along the height direction of the handle 2, the handle 2 is provided with a slider 3 that can move up and down, an adjusting member 4 that can be rotatably arranged at the top of the handle 2 and threadedly matched with the slider 3, and a stopper 5 that is rotatably connected to the handle 2 through a pin shaft 6 in the middle, the stopper 5 is arranged at the strip-shaped through hole 21 and the hole on it that matches the pin shaft 6 is a waist-shaped The upper end of the stopper 5 is hinged to the slider 3, and the lower end of the stopper 5 has a stopper head 52. A slot 11 suitable for cooperating with the stopper head 52 is provided on the circuit breaker housing 1 at the opening position. The slider 3 is driven up and down by rotating the adjusting member 4, and then the stopper 5 is driven to rotate around the pin shaft 6, so that the stopper head 52 retracts or extends out of the strip through hole 21. When the handle 2 is in a locked state, the stopper head 52 extends out of the strip through hole 21 and is inserted into the slot 11. The handle locking device in this embodiment has a reasonable structure. When in use, the handle 2 is first turned to the off-gate position, and then the slider 3 is driven downward by rotating the adjusting member 4, thereby driving the stop member 5 to rotate around the pin shaft 6, and making the stop head 52 extend outward from the strip through hole 21 and snap into the slot 11, so that the handle can be locked in the off-gate position. When the handle is unlocked, the adjusting member 4 is rotated in the reverse direction to drive the slider 3 to move upward, and then the stop member 5 is rotated in the reverse direction around the pin shaft 6, so that the stop head 52 is retracted inwardly into the strip through hole 21. The locking and unlocking operations are convenient, the structure is optimized and reasonable, and there is no need to carry it separately, which has good practicality.

[0014] In this embodiment, the number of the strip-shaped perforations 21 is two, which are respectively arranged on the left and right sides of the handle 2, and the number of the stop members 5 and the card slots 11 are correspondingly set to two, and the locking effect is enhanced by the one-to-one engagement of the stop heads 52 on the two stop members 5 with the two card slots 11.

[0015] In this embodiment, the adjusting member 4 is a bolt, the head of the bolt is outside the top of the handle 2, and a clamping ring 7 is arranged on the rod of the bolt to limit its axial position. In this embodiment, the stopper 5 is preferably made of stainless steel.

[0016] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A handle locking device for a molded case circuit breaker, comprising a circuit breaker housing (1) and a handle (2), wherein the handle (2) has an opening position and a closing position on the circuit breaker housing (1), characterized in that: The handle (2) is a hollow structure, and its side portion has a strip-shaped through hole (21) arranged along the height direction of the handle (2). The handle (2) is provided with a slider (3) that can move up and down, an adjusting member (4) that can be rotatably arranged at the top of the handle (2) and threadedly matched with the slider (3), and a stopper (5) that is rotatably connected to the handle (2) through a pin shaft (6) in the middle. The stopper (5) is arranged at the strip-shaped through hole (21) and the hole on it that matches with the pin shaft (6) is a waist-shaped hole (51). The upper end of the stopper (5) is hinged to the slider (3), and the lower end of the stopper (5) has a stopper head (52). The circuit breaker A slot (11) suitable for cooperating with the stop head (52) is provided on the housing (1) at the opening position. The slider (3) is driven to move up and down by rotating the adjusting member (4), thereby driving the stop member (5) to rotate around the pin shaft (6), so that the stop head (52) retracts or extends out of the strip through hole (21). When the handle (2) is in a locked state, the stop head (52) extends out of the strip through hole (21) and is inserted into the slot (11). The adjusting member (4) is a bolt, the head of the bolt is located outside the top end of the handle (2), and a retaining spring (7) is provided on the rod of the bolt to limit its axial position.

2. The handle locking device for molded case circuit breaker according to claim 1, characterized in that: The number of the strip-shaped through holes (21) is two, which are respectively arranged on the left and right sides of the handle (2), and the number of the stopper (5) and the card slot (11) is correspondingly set to two.

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