CN111415848A

CN111415848A - Switching-on and switching-off handle mechanism of plug-in circuit breaker

Info

Publication number: CN111415848A
Application number: CN202010287069.2A
Authority: CN
Inventors: 李海茭; 史胜余; 许利战; 祁卫华
Original assignee: Delixi Electric Co Ltd
Current assignee: Delixi Electric Co Ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-07-14

Abstract

The invention relates to a switching-off and switching-on handle mechanism of a plug-in circuit breaker, which comprises a handle rocker arm, a rotary disc, a first connecting rod, a second connecting rod and a locking piece. The handle rocker arm is connected with the rotating disc through a first connecting rod, the rotating disc is connected with the operating mechanism through a second connecting rod, a first long-strip shaft hole and a first linkage part are arranged on the handle rocker arm, the first rotating shaft penetrates through the first long-strip shaft hole to enable the handle rocker arm to be hinged with the shell, the locking piece is hinged in the shell through a third rotating shaft and a spring piece, the locking piece comprises a second linkage part and a boss part, and the boss part extends out of the shell; when pulling the handle rocking arm towards the casing outside, first linkage portion drives second linkage portion and removes for the locking piece takes place to rotate around the third pivot, and boss portion retracts to in the casing. Compared with the prior art, the invention controls switching-on and switching-off through the rotation of the handle rocker arm, and operates the locking piece through linear movement, thereby completely avoiding the misoperation problem that the breaker can be separated from the cabinet during switching-off, and simultaneously ensuring the installation stability.

Description

Switching-on and switching-off handle mechanism of plug-in circuit breaker

Technical Field

The invention relates to the field of plug-in circuit breakers, in particular to a switching-on and switching-off handle mechanism of a plug-in circuit breaker.

Background

In recent years, plug-in circuit breakers are more and more widely used, and particularly, with the rapid development of the 5G industry, 5G cabinets have more and more requirements, and plug-in circuit breakers used in cooperation with the 5G cabinets are more and more valued by manufacturers.

Chinese patent application publication No. CN 107993900a discloses a plug-in type miniature circuit breaker. The invention is applied to the most common commercial plug-in circuit breaker. The plug-in circuit breaker adopts a button type structure, and when the button is pressed, the circuit breaker is switched on; when the button is pulled out, the breaker is opened. Meanwhile, the invention is provided with a locking structure for fixing the cabinet and the circuit breaker. When the circuit breaker needs to be taken out of the cabinet machine, the locking structure is unlocked in a mode of pulling out the button in the same way as the opening mode of the circuit breaker. Therefore, the circuit breaker has the following problems:

the relationship between the displacement of the pull-out button for opening the brake and the displacement of the pull-out button for unlocking the lock mechanism is not exactly described in the specification. Therefore, two cases can be described: 1. the brake separating operation is long-distance pulling; the operation of unblock locking structure is the short distance and pulls out, that is to say the separating brake operation can lead to unblock locking structure certainly for the device does not have the locking when separating the brake, takes place the installation easily unreliable, and contact failure's problem takes place to directly extract the circuit breaker even. 2. The switching-off operation is short-distance pulling; the operation of unlocking the locking structure is a long-distance pulling. The general circuit breaker needs great operating force when opening the floodgate, consequently also takes place easily and unlocks the locking structure simultaneously at the separating brake for the circuit breaker is directly pulled out from the rack, causes the maloperation.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a switching-on and switching-off handle mechanism of a plug-in circuit breaker.

The purpose of the invention can be realized by the following technical scheme:

a switching-off and switching-on handle mechanism of an insertion type circuit breaker comprises a handle rocker arm, a rotary table, a first connecting rod and a second connecting rod, wherein the handle rocker arm is hinged to a non-insertion end of a shell of the insertion type circuit breaker through a first rotary shaft, the rotary table is hinged to the shell through a second rotary shaft, the handle rocker arm is connected with the rotary table through the first connecting rod, the rotary table is connected with an operating mechanism in the insertion type circuit breaker through the second connecting rod, the switching-off and switching-on handle mechanism further comprises a locking piece, the handle rocker arm is provided with a first strip shaft hole and a first linkage part, the first rotary shaft penetrates through the first strip shaft hole, the locking piece is hinged to the shell through a third rotary shaft and a spring piece, the locking piece comprises a second linkage part and a;

when pulling the handle rocking arm towards the casing outside, relative slip takes place for first rectangular shaft hole and first pivot, and first linkage portion drives second linkage portion and removes for the restoring force that the locking piece was overcome the spring part takes place to rotate around the third pivot, and boss portion retracts to in the casing from the opening part on casing top.

Further, the handle rocker arm on be equipped with the rectangular shaft hole of second, this rectangular shaft hole of second is on a parallel with first rectangular shaft hole, the rectangular shaft hole of second is passed to the one end of first connecting rod.

Further, the protruding direction of the handle part on the handle rocker arm is parallel to the extending direction of the first long shaft hole.

Furthermore, the handle rocker arm is provided with a pulling part, and the setting direction of the pulling part is parallel to the extending direction of the first long shaft hole.

Furthermore, one end of the first long shaft hole is the rotation center of the handle rocker arm.

Further, when the plug-in circuit breaker is in the opening state, the rotating position of the handle rocker arm causes the first linkage portion to contact the second linkage portion on the locking member.

Furthermore, the first linkage part is provided with an inclined surface, and one end of the second linkage part is in contact with the inclined surface and can slide along the inclined surface.

Furthermore, the spring part is a torsion spring or a tension and compression spring.

Compared with the prior art, the invention has the following advantages:

1. the invention controls the switch-on and switch-off of the plug-in circuit breaker by the rotation of the handle rocker arm, and operates the locking piece by the linear movement of the handle rocker arm. The problem of misoperation that the whole circuit breaker can deviate from the cabinet when opening is completely avoided through the structural design of different operations.

2. The locking piece extends out of the shell all the time through the spring piece under the ordinary state and is used for locking the cabinet and the circuit breaker. When the circuit breaker is dismantled to needs, only need horizontal pulling handle rocking arm, the handle rocking arm drives the locking piece unblock, and the user can accomplish the dismantlement in the same place, has both ensured the stability of installation, convenient to detach operation again.

3. And a second long-strip shaft hole is formed in the handle rocker arm, so that the first connecting rod and the handle rocker arm can move relatively. If the second long shaft hole does not exist, the handle rocker arm can drive the turntable to continue rotating through the second connecting rod when moving horizontally, so that the difficulty degree of movement is increased; meanwhile, the turntable continuously rotates to drive the operating mechanism to further displace the moving contact, so that the displacement distance of the moving contact is increased, and the miniaturization of the size of the plug-in circuit breaker is not facilitated.

4. The handle rocker arm is provided with the drawing part, so that a user can operate the horizontal movement of the handle rocker arm conveniently.

5. One end of the first long-strip shaft hole is the rotating center of the handle rocker arm, so that the stability of the rotating operation handle rocker arm is ensured.

Drawings

Fig. 1 is a schematic structural view of a plug-in type circuit breaker.

Fig. 2 is a structural schematic diagram of the switching-on/off handle mechanism.

Fig. 3 is a structural view illustrating the installation of the locking member.

Fig. 4 is a schematic structural view of the locking member.

Fig. 5 is a schematic structural view of the handle rocker.

Fig. 6 is a schematic structural diagram of a closing state of the circuit breaker.

Fig. 7 is a schematic structural diagram of the circuit breaker in the open state.

Fig. 8 is a schematic structural view of a disassembled state of the circuit breaker.

Fig. 9 is a schematic structural view of a handle rocker arm in another embodiment.

Reference numerals: 1. the switching-on/off handle mechanism comprises a switching-on/off handle mechanism 11, a handle rocker 11a, a first long shaft hole, 11b, a second long shaft hole, 11c, a first linkage part, 11d, a handle part, 11e, a drawing part, 12, a rotary disc, 13, a first connecting rod, 14, a second connecting rod, 15, a locking part, 15a, a second linkage part, 15b, a boss part, 16, a first rotating shaft, 17, a second rotating shaft, 18, a third rotating shaft, 19, a spring part, 2, a shell, 21, an opening, 3, an operating mechanism, 31, a movable contact, 4, a short-circuit protection mechanism, 41, a static contact, 5, an overload protection mechanism, 6, an arc extinguishing mechanism, 7, a wire inlet end, 8 and a wire outlet end.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1 and 2, the present embodiment provides a switching-on/off handle mechanism 1 of a plug-in circuit breaker, which is installed in a certain plug-in circuit breaker. As shown in fig. 1, the plug-in circuit breaker further includes a housing 2, an operating mechanism 3, a short-circuit protection mechanism 4, an overload protection mechanism 5, a wire inlet terminal 7 and a wire outlet terminal 8. The switching-on/off handle mechanism 1 is installed on one side of the shell 2. The outlet end 8 is arranged below the same side of the opening and closing handle mechanism 1; the inlet wire end 7 is arranged on the other side of the housing 2. The short-circuit protection mechanism 4 and the overload protection mechanism 5 are in driving fit with the switching-on/off handle mechanism 1 through the operating mechanism 3 respectively, and the short-circuit protection mechanism 4 is arranged on the right side of the wire outlet end 8 and below the operating mechanism 3 and is connected with the wire outlet end 8. The overload protection mechanism 5 is arranged in connection with the inlet line end 7 through a flexible lead/flexible coupling and is arranged between the operating mechanism 3 and the inlet line end 7. The arc extinguishing mechanism 6 is arranged below the overload protection mechanism 5 and on the right of the short-circuit protection mechanism 4.

The switching-on/off handle mechanism 1 specifically comprises a handle rocker arm 11, a rotary disc 12, a first connecting rod 13 and a second connecting rod 14. The handle rocker 11 is hinged to the non-inserted end of the housing 2 by a first pivot 16. The rotary disc 12 is hinged in the housing 2 through a second rotating shaft 17 and is positioned behind the handle rocker 11, and the handle rocker 11 and the rotary disc 12 are connected through a first connecting rod 13. The operating mechanism 3 is located behind the rotary plate 12, and is connected with the rotary plate 12 through a second connecting rod 14. When the handle rocker 11 rotates around the first rotating shaft 16, the first connecting rod 13 drives the rotating disc 12 to rotate together, and then the rotating disc 12 drives the moving contact 31 on the operating mechanism 3 to move through the second connecting rod 14, so that the moving contact 31 is in contact with or separated from the fixed contact 41 in the short-circuit protection mechanism 4, and the switching-on or switching-off of the circuit breaker is realized. The opening and closing handle mechanism 1 further comprises a locking member 15 which is linked with the handle rocker arm 11.

As shown in fig. 2 to 5, the locking member 15 includes a second coupling portion 15a and a boss portion 15b connected to each other, and the connection is hinged in the housing 2 by a third rotation shaft 18 and a spring member 19. The locking member 15 is located rearward and above the handle rocker 11. The spring member 19 is typically a torsion spring or a tension and compression spring, and a torsion spring is used in this embodiment. The torsion spring is nested on the third rotating shaft 18, one end of the torsion spring is fixedly connected to the locking piece 15, and the other end of the torsion spring is fixed on the inner side wall of the shell 2. An opening 21 is provided at the top end of the housing 2, and the locking member 15 is normally under the action of the spring member 19 to make the boss portion 15b always protrude out of the housing 2 from the opening 21, so as to form a fixing with the cabinet.

The handle swing arm 11 is provided with a first elongated shaft hole 11a, a second elongated shaft hole 11b, and a first interlocking portion 11 c. The second elongated shaft hole 11b is parallel to the first elongated shaft hole 11 a. The first rotating shaft 16 fixed to the housing 2 passes through the first elongated shaft hole 11 a; one end of the first link 13 passes through the second elongated shaft hole 11 b. The direction of projection of the grip portion 11d on the handle swing arm 11 is parallel to the direction of extension of the first elongated shaft hole 11 a. One end of the first elongated shaft hole 11a is the rotation center of the handle swing arm 11.

When the plug-in type circuit breaker is in the opening state, the handle swing arm 11 is rotated to a position such that the first interlocking portion 11c contacts the second interlocking portion 15a on the locking member 15 while the first elongated shaft hole 11a and the second elongated shaft hole 11b are both in a horizontal state. When the swing handle lever 11 is pulled in an outward direction of the housing 2, the first elongated shaft hole 11a and the first rotating shaft 16 slide relatively, the second elongated shaft hole 11b and the first link 13 slide relatively at the same time, the first interlocking part 11c moves the second interlocking part 15a, so that the locking member 15 rotates about the third rotating shaft 18 against the restoring force of the spring member 19, and the boss part 15b retracts into the housing 2 from the opening 21 at the top end of the housing 2.

The working principle of the embodiment is as follows:

as shown in fig. 6 to 8, when the circuit breaker is normally switched on and off, the locking piece 15 makes the boss part 15b extend out of the housing 2 from the opening 21 all the time under the action of the spring piece, so as to form a fixation with the cabinet. In this case, the first shaft 16 is located at the leftmost end of the first elongated shaft hole 11a, and the end of the first link 13 is also located at the leftmost end of the second elongated shaft hole 11 b. The locking piece 15 rotates about the leftmost end of the first elongated shaft hole 11 a.

When the breaker needs to be disassembled, the handle rocker arm 11 of the breaker is firstly shifted to an opening state. In the brake-off state, the handle 11d of the handle swing arm 11 is positioned at the lower end, and the first elongated shaft hole 11a and the second elongated shaft hole 11b are in a horizontal state. The first linkage portion 11c and the second linkage portion 15a contact each other; the lever arm 11 is then pulled outward, with the first pivot 16 located at the rightmost end of the first elongated shaft hole 11a and the end of the first link 13 also located at the rightmost end of the second elongated shaft hole 11 b. So that the first linkage portion 11c drives the second linkage portion 15a to move upward, specifically, the second linkage portion 15a slides along the inclined surface of the first linkage portion 11c, and thus, the locking member 15 rotates around the third rotating shaft 18 against the restoring force of the spring member, and the boss portion 15b retracts from the opening 21 at the top end of the housing 2 into the housing 2. And then the whole circuit breaker can be conveniently pulled out of the cabinet by continuously pulling the handle rocker arm 11 outwards.

In another embodiment, as shown in fig. 9, the handle swing arm 11 is provided with a pulling portion 11e, and the pulling portion 11e is disposed in a direction parallel to the extending direction of the first elongated shaft hole 11a, so as to facilitate the horizontal movement of the handle swing arm 11 operated by the user. The pulling operation or the poking operation is distinguished through the original structures of the handle part 11d and the pulling part 11e, and the use by a user is convenient.

In yet another embodiment, the second elongated axial bore 11b is a generally circular bore. When the handle rocker arm 11 is pulled to the outside of the housing 2, the handle rocker arm 11 horizontally moves to drive the rotating disc 12 to continue rotating through the second connecting rod 14, and meanwhile, the first linkage part 11c of the handle rocker arm 11 drives the second linkage part 15a of the locking piece 15, so that the cabinet and the circuit breaker are in contact locking.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a divide-shut brake handle mechanism of plug-in circuit breaker, includes handle rocking arm (11), carousel (12), first connecting rod (13) and second connecting rod (14), handle rocking arm (11) articulate through first pivot (16) and insert the end at plug-in circuit breaker's casing (2) non-insertion, carousel (12) through second pivot (17) articulated casing (2) in, handle rocking arm (11) connect carousel (12) through first connecting rod (13), operating device (3) in plug-in circuit breaker are connected through second connecting rod (14) in carousel (12), its characterized in that still includes locking piece (15), handle rocking arm (11) on be equipped with first rectangular shaft hole (11a) and first linkage portion (11c), first pivot (16) pass first rectangular shaft hole (11a), locking piece (15) articulate in casing (2) through third pivot (18) and spring part (19), the locking piece (15) comprises a second linkage part (15a) and a boss part (15b), an opening (21) is formed at the top end of the shell (2), and the boss part (15b) extends out of the shell (2) from the opening (21);

when the handle rocker arm (11) is pulled towards the outer side of the shell (2), the first long shaft hole (11a) and the first rotating shaft (16) slide relatively, the first linkage part (11c) drives the second linkage part (15a) to move, so that the locking piece (15) overcomes the restoring force of the spring piece (19) to rotate around the third rotating shaft (18), and the boss part (15b) retracts into the shell (2) from the opening (21) at the top end of the shell (2).

2. A switch-on/switch-off handle mechanism of a plug-in type circuit breaker according to claim 1, wherein the handle rocker arm (11) is provided with a second elongated shaft hole (11b), the second elongated shaft hole (11b) is parallel to the first elongated shaft hole (11a), and one end of the first link (13) passes through the second elongated shaft hole (11 b).

3. A switch-on/switch-off handle mechanism of a plug-in circuit breaker according to claim 1, characterized in that the direction of projection of the handle portion (11d) on the handle rocker arm (11) is parallel to the direction of extension of the first elongated shaft hole (11 a).

4. The switching handle mechanism of the plug-in circuit breaker according to claim 1, wherein the handle rocker arm (11) is provided with a pulling portion (11e), and the direction of the pulling portion (11e) is parallel to the extending direction of the first elongated shaft hole (11 a).

5. A switching-on/off handle mechanism of a plug-in type circuit breaker according to claim 1, wherein one end of the first elongated shaft hole (11a) is a rotation center of the handle swing arm (11).

6. The switch-on/switch-off handle mechanism of the plug-in circuit breaker according to claim 1, characterized in that the rotational position of the handle rocker (11) is such that the first interlocking portion (11c) contacts the second interlocking portion (15a) on the locking member (15) when the plug-in circuit breaker is in the switch-off state.

7. The switching handle mechanism of the plug-in circuit breaker according to claim 1, wherein the first interlocking portion (11c) is provided with an inclined surface, and one end of the second interlocking portion (15a) is in contact with the inclined surface and is slidable along the inclined surface.

8. A switch-on/switch-off handle mechanism of a plug-in circuit breaker according to claim 1, characterized in that the spring member (19) is a torsion spring or a tension/compression spring.