CN112768306B - Fixing and unlocking mechanism and circuit breaker - Google Patents
Fixing and unlocking mechanism and circuit breaker Download PDFInfo
- Publication number
- CN112768306B CN112768306B CN201911001978.9A CN201911001978A CN112768306B CN 112768306 B CN112768306 B CN 112768306B CN 201911001978 A CN201911001978 A CN 201911001978A CN 112768306 B CN112768306 B CN 112768306B
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- China
- Prior art keywords
- unlocking
- locking
- circuit breaker
- fixing
- unlocking mechanism
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/1009—Interconnected mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
- H01H9/286—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member making use of a removable locking part acting directly on the operating part
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- Switch Cases, Indication, And Locking (AREA)
- Patch Boards (AREA)
Abstract
本申请提供了一种固定及解锁机构和断路器，涉及低压电器技术领域。该固定及解锁机构包括壳体、传动件、锁扣件和解锁件，锁扣件与壳体转动连接，锁扣件上设有锁止块；解锁件与壳体转动连接。断路器合闸状态下，锁止块用于插入机柜板的限位孔中以限定锁扣件的位置。传动件能够在外力作用下绕自身轴线转动并带动解锁件相对壳体转动，使得解锁件带动锁扣件相对壳体转动，以使锁止块脱离限位孔，且传动件绕自身轴线转动能使断路器处于分闸状态。该固定及解锁机构能应用在断路器中，并且使得断路器只能在分闸状态下才能从机柜中拔出，分闸状态下拔出不会产生电弧，因而能够提高该断路器的操作安全性。
The present application provides a fixing and unlocking mechanism and a circuit breaker, and relates to the field of low-voltage electrical appliance technology. The fixing and unlocking mechanism includes a housing, a transmission member, a locking member and an unlocking member, wherein the locking member is rotatably connected to the housing, and a locking block is provided on the locking member; and the unlocking member is rotatably connected to the housing. When the circuit breaker is in the closed state, the locking block is used to insert into the limiting hole of the cabinet plate to limit the position of the locking member. The transmission member can rotate around its own axis under the action of an external force and drive the unlocking member to rotate relative to the housing, so that the unlocking member drives the locking member to rotate relative to the housing, so that the locking block is disengaged from the limiting hole, and the transmission member rotates around its own axis to put the circuit breaker in an open state. The fixing and unlocking mechanism can be applied to the circuit breaker, and the circuit breaker can be pulled out of the cabinet only in the open state, and no arc will be generated when it is pulled out in the open state, thereby improving the operational safety of the circuit breaker.
Description
Technical Field
The invention relates to the technical field of piezoelectric devices, in particular to a fixing and unlocking mechanism and a circuit breaker.
Background
With the widespread use of plug-in circuit breakers on various electrical apparatuses, the structure of the plug-in circuit breaker has been developed to be varied in order to meet the installation needs of various electrical apparatuses.
When the conventional plug-in circuit breaker is installed, when the circuit breaker is connected with a wire and is closed, a small arc is generated between the wiring terminal and the bus bar of the circuit breaker when the circuit breaker is pulled out of the cabinet, and the safety of nearby equipment can be endangered.
Disclosure of Invention
The invention aims to provide a fixing and unlocking mechanism and a circuit breaker, which can ensure that the circuit breaker can only be pulled out of a cabinet in a separated state, so that an arc can be prevented from being generated between a terminal of the circuit breaker and a bus bar, and the safety of the circuit breaker is improved.
Embodiments of the invention may be implemented as follows:
In a first aspect, an embodiment of the present invention provides a fixing and unlocking mechanism, which is applied to a circuit breaker, where the fixing and unlocking mechanism includes a housing, a transmission member, a locking member and an unlocking member, the locking member is rotationally connected with the housing, and a locking block is disposed on the locking member; the unlocking piece is rotationally connected with the shell;
In the closing state of the circuit breaker, the locking block is used for being inserted into a limiting hole of the cabinet plate to limit the position of the locking piece;
The transmission piece can rotate around the axis of the transmission piece under the action of external force so that the circuit breaker is in a brake-separating state, and the transmission piece can drive the unlocking piece to rotate relative to the shell when rotating around the axis of the transmission piece, so that the unlocking piece drives the locking piece to rotate relative to the shell, and the locking piece is separated from the limiting hole.
In an alternative embodiment, the locking member includes a first end and a second end disposed opposite each other, the first end being hinged to the housing, and the locking block being disposed between the first end and the second end. The second end is provided with an abutting part, and the unlocking piece can drive the abutting part to rotate relative to the shell.
In an alternative embodiment, the locking device further comprises an elastic piece, wherein the elastic piece is abutted with the locking piece, and the elastic piece is located on one side, away from the locking block, of the locking piece.
In an alternative embodiment, the unlocking member includes a body, and a first shifting block and a second shifting block disposed on the body, where the transmission member can rotate around its own axis under the action of external force and drive the first shifting block to rotate relative to the housing, so that the second shifting block drives the locking member to rotate relative to the housing.
In an alternative embodiment, the first and second dials are disposed at an angle.
In an alternative embodiment, the housing is provided with a first rotating shaft, the body is provided with a central through hole, and the body is sleeved on the first rotating shaft through the central through hole.
In an alternative embodiment, the transmission member includes a transmission gear, and a boss is disposed on the transmission gear, and the boss can drive the unlocking member to rotate relative to the housing.
In an alternative embodiment, the outer peripheral surface of the boss is provided with a driving surface, the driving surface comprises at least one concave surface, and the driving surface can drive the unlocking piece to rotate relative to the shell.
In an alternative embodiment, the device further comprises a driving piece, wherein the driving piece is in transmission connection with the transmission piece and drives the transmission piece to rotate.
In a second aspect, an embodiment of the present invention provides a circuit breaker, including a brake release assembly and a fixing and unlocking mechanism according to any one of the foregoing embodiments, where the brake release assembly is in transmission connection with the transmission member.
The beneficial effects of the embodiment of the invention include, for example:
The fixing and unlocking mechanism provided by the invention can be applied to a circuit breaker, and by arranging the locking piece, the unlocking piece and the transmission piece, only when the transmission piece rotates around the axis of the transmission piece under the action of external force, the transmission piece can drive the unlocking piece to rotate relative to the shell, the unlocking piece can drive the locking piece to rotate relative to the shell, so that the locking block of the locking piece is separated from the limiting hole, and meanwhile, the circuit breaker can be in a breaking state by rotating the transmission piece, so that when the circuit breaker is pulled out from the cabinet, the circuit breaker is in a breaking state, namely a breaking state, and thus, electric arcs are prevented from being generated between the wiring terminal and the busbar of the circuit breaker, and the safety of operators and nearby equipment is improved.
The circuit breaker comprises the opening assembly and the fixing and unlocking mechanism, wherein the opening assembly is in transmission connection with the transmission piece, when the transmission piece rotates around the axis of the transmission piece under the action of external force, the locking block of the locking piece can be separated from the limiting hole through the unlocking piece, and the opening assembly can be driven to act, so that the circuit breaker is in an opening state, and when the circuit breaker is pulled out of the cabinet, the circuit breaker is ensured to be in the opening state, and the safety is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a first view angle of a circuit breaker according to an embodiment of the present invention;
fig. 2 is a simplified schematic diagram of a second view of a circuit breaker according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a locking state application scenario under a first view angle of a fixing and unlocking mechanism of a circuit breaker according to an embodiment of the present invention;
Fig. 4 is a schematic diagram of an application scenario of an unlock state under a first view angle of a fixing and unlocking mechanism of a circuit breaker according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a first view of a locking element of a fixing and unlocking mechanism according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a second view of a locking element of a fixing and unlocking mechanism according to an embodiment of the present invention;
FIG. 7 is a schematic view of a structure of an unlocking member of a fixing and unlocking mechanism according to an embodiment of the present invention;
FIG. 8 is a schematic view of an installation structure of an elastic member of a fixing and unlocking mechanism according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a driving member of a fixing and unlocking mechanism according to an embodiment of the present invention;
FIG. 10 is a schematic view of a structure of a locking and unlocking mechanism according to an embodiment of the present invention;
fig. 11 is a schematic structural view of a fixing and unlocking mechanism in an unlocked state according to an embodiment of the present invention.
Icon: 10-a circuit breaker; 20-a brake separating assembly; 30-cabinet board; 31-limiting holes; 110-a housing; 120-driving piece; 121-a transmission gear; 123-boss; 1231-teeth; 125—a driving surface; 126-concave; 127-holding surface; 128-a center hole of rotation; 130-a catch piece; 131-locking blocks; 132-a first end; 133-a second end; 134-a stationary shaft; 135-abutment; 1351-guide ramp; 1301-upper surface; 1303-lower surface; 1305-stop surface; 140-unlocking piece; 141-a body; 143-a first dial; 145-a second dial; 146-a central through hole; 150-a driving member; 160-an elastic member; 161-second torsion arm; 163-first torsion arm; 165-a second spindle; 170-decelerator.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1 and 2, the present embodiment provides a circuit breaker 10, wherein the circuit breaker 10 includes a fixing and unlocking mechanism and a breaking assembly 20, and the circuit breaker 10 is a plug-in circuit breaker 10 and can be installed in a cabinet. The circuit breaker 10 is characterized in that when the circuit breaker 10 is in a closing state, the fixing and unlocking mechanism is in a locking state; when the circuit breaker 10 is in the open state, the fixing and unlocking mechanism is in the unlocked state. Only when the breaker 10 is in the opening state, the breaker 10 can be pulled out from the cabinet, so that electric arcs generated between the wiring terminal of the breaker 10 and the bus bar can be avoided, potential safety hazards are eliminated, and safety of operators and the breaker 10 and equipment nearby the same is greatly improved.
The fixing and unlocking mechanism comprises a shell 110, a transmission member 120, a locking member 130, an unlocking member 140, a driving member 150 and an elastic member 160, wherein the locking member 130 is rotationally connected with the shell 110, a locking block 131 is arranged on the locking member 130, and the unlocking member 140 is rotationally connected with the shell 110. The cabinet includes a cabinet plate 30, and the circuit breaker 10 is connected to the cabinet plate 30. Further, the cabinet board 30 is provided with a limiting hole 31 (see fig. 4), and the housing 110 is provided with a mounting through hole corresponding to the limiting hole 31, and the mounting through hole is communicated with the limiting hole 31. In the closing state of the circuit breaker 10, the locking block 131 passes through the installation through hole of the housing 110 and is inserted into the limit hole 31 of the cabinet plate 30 to define the position of the locking piece 130, so that the locking piece 130 of the circuit breaker 10 is in the locking state, in which the circuit breaker 10 cannot be pulled out from the cabinet, as shown in fig. 3.
The transmission member 120 can rotate around the axis thereof under the action of an external force to enable the circuit breaker 10 to be in a switching-off state, and the transmission member 120 can rotate around the axis thereof and simultaneously drive the unlocking member 140 to rotate relative to the housing 110, so that the unlocking member 140 drives the locking member 130 to rotate relative to the housing 110, and the locking block 131 is separated from the limiting hole 31. In this open state, the circuit breaker 10 can be pulled out of the cabinet, as shown in fig. 4. Because the circuit breaker 10 can only be pulled out from the cabinet when in the unlocking state and the opening state, the electric arc between the wiring terminal and the bus bar of the circuit breaker 10 is avoided, and the safety performance is greatly improved.
Alternatively, as shown in fig. 5 and 6, the latch 130 includes a first end 132 and a second end 133 disposed opposite to each other, the first end 132 being hinged to the housing 110, and the latch block 131 being disposed between the first end 132 and the second end 133. For convenience of description, a side of the locker 130 near the cabinet board 30 is defined as an upper surface 1301 of the locker 130, and a side of the locker 130 remote from the cabinet board 30 is defined as a lower surface 1303 of the locker 130. The locking block 131 is protruded on the upper surface 1301 of the locking piece 130 so as to be inserted into the limiting hole 31 of the cabinet board 30 to achieve locking. In this embodiment, a circular arc groove (not shown) is formed on the housing 110, and a fixed shaft 134 is installed in the circular arc groove, and the fixed shaft 134 is cylindrical; the first end 132 is sleeved on the fixed shaft 134, so that the locking member 130 can rotate around the fixed shaft 134 relative to the housing 110. Of course, in other alternative embodiments, the shape of the fixing shaft 134, the mounting manner of the fixing shaft 134, etc. may be flexibly adjusted, and the shape of the circular arc groove on the housing 110 may be changed adaptively, not only in the above-mentioned cases. For example, two connecting holes are formed in the housing 110, the fixed shaft 134 is fixedly connected to the first end 132, and two ends of the fixed shaft 134 are respectively disposed in the two connecting holes, so that the locking member 130 can rotate relative to the housing 110, which is not illustrated here.
Further, the second end 133 is provided with an abutment portion 135, and the unlocking member 140 can apply a force to the abutment portion 135 away from the cabinet board 30 to drive the abutment portion 135 to rotate relative to the housing 110. The abutting portion 135 extends along the direction of the second end 133 away from the first end 132, in this embodiment, the abutting portion 135 and the end of the second end 133 form a step shape, one side of the abutting portion 135 near the upper surface 1301 is provided with a guiding inclined plane 1351, and the guiding inclined plane 1351 extends from the end surface of the second end 133 and inclines towards the direction near the lower surface 1303 of the locking member 130. The guide inclined plane 1351 is used for contacting with the unlocking member 140, so that the contact area between the unlocking member 140 and the guide inclined plane 1351 is larger in the rotation process of the unlocking member 140, and the force application effect of the unlocking member 140 on the abutting portion 135 is better.
Referring to fig. 7, the unlocking member 140 includes a body 141, and a first shifting block 143 and a second shifting block 145 disposed on the body 141, and the transmission member 120 can rotate around its own axis under the action of an external force and drive the first shifting block 143 to rotate relative to the housing 110, so that the second shifting block 145 drives the locking member 130 to rotate relative to the housing 110 in a direction away from the cabinet board 30. In this embodiment, the first and second dials 143 and 145 are disposed at an angle, and alternatively, the angle formed between the first and second dials 143 and 145 is about 40 to 80 degrees. Of course, other angle values may be set according to actual circumstances, and are not particularly limited herein. The first shifting block 143, the second shifting block 145 and the body 141 may be integrally formed or may be fixedly connected in a split manner.
Further, the housing 110 is provided with a first rotating shaft (not shown), the body 141 is provided with a central through hole 146, the body 141 is sleeved on the first rotating shaft through the central through hole 146, and the unlocking member 140 can rotate around the first rotating shaft. When the first shift block 143 is rotated, the second shift block 145 is also rotated. In this embodiment, as shown in fig. 3, if the transmission member 120 rotates to drive the first shifting block 143 to rotate clockwise around the first rotation axis, the second shifting block 145 rotates clockwise along with the first rotation axis, and the second shifting block 145 applies pressure to the abutting portion 135 away from the cabinet board 30 to drive the abutting portion 135 to rotate counterclockwise around the fixed shaft 134, so that the locking block 131 can be disengaged from the limiting hole 31 of the cabinet board 30, and the locking member 130 is in an unlocked state as shown in fig. 4.
The elastic member 160 is disposed on the lower surface 1303 of the latch member 130, i.e. the side of the latch member 130 away from the cabinet board 30, and the elastic member 160 is always abutted against the latch member 130 to apply an elastic force to the latch member 130 toward the cabinet board 30. When the locking piece 130 is switched from the locked state to the unlocked state, the unlocking piece 140 drives the abutting portion 135 to move in a direction away from the cabinet board 30, and the unlocking piece 140 overcomes the elastic force of the elastic piece 160 to apply work, so that the locking piece 131 is separated from the limiting hole 31. When the locking piece 130 is switched from the unlocking state to the locking state, the locking piece 130 rotates in a direction approaching the cabinet board 30 under the elastic restoring force of the elastic piece 160, so that the locking block 131 is inserted into the limiting hole 31.
Referring to fig. 8, in the present embodiment, the elastic member 160 employs a torsion spring, a second rotating shaft 165 is fixed on the housing 110, the torsion spring is sleeved on the second rotating shaft 165, and the torsion spring includes a first torsion arm 163 and a second torsion arm 161. The first torsion arm 163 abuts against the stop surface 1305 of the latch 130, and the second torsion arm 161 abuts against the transmission member 120. Of course, not limited thereto, in other alternative embodiments, the second torsion arm 161 can be fixed in other positions, such as the housing 110; the elastic member 160 may also be another elastic member such as a spring plate, an elastic rope, or a compression spring, so long as the elastic member 160 abuts against the latch member 130, and in the process of switching the latch member 130 from the locked state to the unlocked state, the unlocking member 140 overcomes the elastic force of the elastic member 160 to do work, so that the elastic member 160 stores elastic potential energy; when the latch 130 is switched from the unlocked state to the locked state, the latch 130 can move to a side close to the cabinet board 30 under the action of the elastic restoring force, so as to realize locking. The shape, structure, and installation manner of the elastic member 160 are flexible and various, and are not particularly limited herein.
Referring to fig. 9, in the present embodiment, the transmission member 120 includes a transmission gear 121, and the transmission gear 121 is a half-tooth gear, i.e. only a part of the circumference of the transmission gear 121 is provided with meshing teeth. The transmission gear 121 is axially provided with a boss 123, the boss 123 is consistent with the rotation center of the transmission gear 121, the first shifting block 143 of the unlocking piece 140 is abutted with the boss 123, and the rotation of the boss 123 can drive the unlocking piece 140 to rotate relative to the shell 110. In this embodiment, the second torsion arm 161 of the elastic member 160 abuts against the boss 123, and the boss 123 plays a role in fixing and limiting the second torsion arm 161.
Further, the outer circumferential surface of the boss 123 includes a driving surface 125 and a holding surface 127 that are connected to each other, wherein when the first pulling block 143 of the unlocking member 140 contacts the driving surface 125, the rotation of the boss 123 can drive the unlocking member 140 to rotate relative to the housing 110. Optionally, the driving surface 125 includes at least one concave surface 126, where the concave surface 126 can ensure that the boss 123 applies a reliable steering force to the first shifting block 143, optionally, a third rotating shaft (not shown) is disposed on the housing 110, the transmission gear 121 is provided with a rotation center hole 128, and the transmission gear 121 is sleeved on the third rotating shaft through the rotation center hole 128 and can rotate around the third rotating shaft, where the third rotating shaft is located on the self axis of the transmission gear 121. The boss 123 and the transmission gear 121 may be integrally formed or may be fixedly connected in a split manner. When the transmission gear 121 rotates, the boss 123 rotates together therewith, and the holding surface 127 of the boss 123 is an arc surface and concentric with the transmission gear 121. When the first shifting block 143 abuts against the holding surface 127, the boss 123 rotates to prevent the first shifting block 143 from rotating, and the holding surface 127 only plays a limiting role on the first shifting block 143. The distance between the driving surface 125 of the boss 123 and the rotation center during the rotation of the transmission gear 121 is varied, so that when the first shifting block 143 of the unlocking member 140 contacts with the driving surface 125, the boss 123 can drive the first shifting block 143 to rotate relative to the housing 110 during the rotation. The driving surface 125 in this embodiment shows only one concave surface 126, and in other alternative embodiments, the number of concave surfaces 126 may be two, three or more, which is not particularly limited herein.
In this embodiment, the holding surface 127 is provided with a plurality of teeth 1231, the teeth 1231 are used for being in transmission connection with gears in the brake release unit, and when the transmission gear 121 rotates along the first direction, the teeth 1231 of the boss 123 can drive the brake release assembly 20 to move, so that the brake release assembly 20 is in a disconnected state, i.e. a brake release state; when the transmission gear 121 rotates along the second direction, the teeth 1231 of the boss 123 can drive the opening assembly 20 to move, so that the opening assembly 20 is in the on state, i.e. the closed state.
Referring to fig. 10, when the locking member 130 is in a locked state, the first shifting block 143 abuts against the driving surface 125 of the boss 123, and when the boss 123 rotates clockwise in the position shown in fig. 10, the first shifting block 143 abuts against the concave surface 126, the driving surface 125 drives the first shifting block 143 to rotate counterclockwise, so that the second shifting block 145 applies a force to the abutting portion 135 in a direction away from the cabinet board 30, so that the locking member 130 rotates around the fixed shaft 134 in a direction away from the cabinet board 30, and the locking block 131 is separated from the limiting hole 31 of the cabinet board 30, thereby unlocking the locking member 130. In the process of rotating the locking piece 130 around the fixed shaft 134 along the direction away from the cabinet plate 30, the first torsion arm 163 of the torsion spring is pressed downwards, the work of the first torsion arm 163 is overcome, and the second torsion arm 161 of the torsion spring is abutted and fixed with the outer peripheral surface of the boss 123.
Referring to fig. 11, when the locking member 130 is in the unlocked state, the first shifting block 143 abuts against the retaining surface 127 of the boss 123, and when the boss 123 rotates in the counterclockwise direction in the position shown in fig. 11, the first shifting block 143 abuts against the concave surface 126, the driving surface 125 drives the first shifting block 143 to rotate in the clockwise direction, so that the force applied by the second shifting block 145 to the abutting portion 135 disappears, the locking member 130 rotates around the fixed shaft 134 in the direction approaching to the cabinet board 30 under the elastic restoring force of the torsion spring, and the locking block 131 is clamped into the limiting hole 31 of the cabinet board 30, so as to lock the locking member 130. The second torsion arm 161 of the torsion spring is always in contact with and fixed to the outer peripheral surface of the boss 123, and it is to be noted that the second torsion arm 161 shown in the drawing of this embodiment is in contact with the holding surface 127 in both the locked state and the unlocked state. In other alternative embodiments, the second torsion arm 161 may also abut the driving surface 125, which is not specifically limited herein.
It will be readily appreciated that the driving member 120 may be rotated about its own axis by an external force, which may be manually applied or electrically driven, and is not particularly limited herein. In this embodiment, the external force applied to the transmission member 120 is provided by the driving member 150. The driving member 150 is in driving connection with the driving member 120, and provides driving force for the driving member 120 to drive the driving member 120 to rotate. Alternatively, the driving member 150 adopts a driving motor, the driving motor is in transmission connection with the speed reducer 170, and the speed reducer 170 is in transmission connection with the transmission gear 121 to drive the transmission gear 121 to rotate.
The working principle of the fixing and unlocking mechanism and the circuit breaker 10 provided in this embodiment is as follows:
After the circuit breaker 10 is mounted on the cabinet board 30, the circuit breaker 10 is in a closed state. The fixing and unlocking mechanism of the circuit breaker 10 is in a locked state, and the locking block 131 is located in the limiting hole 31 of the cabinet plate 30. If the circuit breaker 10 needs to be pulled out from the cabinet, the driving motor rotates in the first direction, that is, rotates forward, the driving force of the driving motor is transmitted to the transmission gear 121 through the speed reducer 170 to drive the transmission gear 121 to rotate forward around the third rotating shaft (rotate anticlockwise in the view angle shown in fig. 3 and rotate clockwise in the view angle shown in fig. 10), during the rotation of the transmission gear 121, the driving surface 125 of the boss 123 pushes the first shifting block 143 of the unlocking member 140 to rotate around the first rotating shaft, so that the second shifting block 145 drives the abutting portion 135 of the locking member 130 to rotate around the fixed shaft 134 and in the direction away from the cabinet plate 30, so that the locking block 131 is away from the cabinet plate 30 and is separated from the limiting hole 31 of the cabinet plate 30, and the locking member 130 is in the unlocking state. Meanwhile, in the process of forward rotation of the transmission gear 121 around the third rotating shaft, the tooth part 1231 on the holding surface 127 of the boss 123 is meshed with the gear in the brake separating assembly 20, so as to drive the brake separating assembly 20 to move, and the brake separating assembly 20 is in a disconnected state, namely, the breaker 10 is in a brake separating state. At this time, the circuit breaker 10 can be pulled out from the cabinet, and because the circuit breaker 10 is in a breaking state, namely a power-off state, when pulled out, an arc can be prevented from being generated between the wiring terminal of the circuit breaker 10 and the bus bar, thereby improving the safety of the circuit breaker 10 and equipment nearby the circuit breaker 10, and simultaneously greatly ensuring the personal safety of operators.
Similarly, if the circuit breaker 10 needs to be installed in the cabinet board 30, the driving motor rotates in the second direction, i.e. reverses, the driving force of the driving motor is transmitted to the transmission gear 121 through the speed reducer 170, so as to drive the transmission gear 121 to reverse around the third rotation axis (rotate clockwise in the view angle shown in fig. 4 and anticlockwise in the view angle shown in fig. 11), during the rotation of the transmission gear 121, the driving surface 125 of the boss 123 pushes the first shifting block 143 of the unlocking member 140 to rotate around the first rotation axis, so that the second shifting block 145 rotates around the first rotation axis and in the direction approaching the cabinet board 30, at this time, the pressure of the second shifting block 145 against the abutment 135 disappears, and the abutment 135 rotates around the fixed axis 134 under the elastic restoring force of the elastic member 160 and in the direction approaching the cabinet board 30, so that the locking block 131 also moves in the direction approaching the cabinet board 30 until the locking block 131 is inserted into the limiting hole 31 of the cabinet board 30, and the locking member 130 is in the locked state. Meanwhile, in the process of reversely rotating the transmission gear 121 around the third rotating shaft, the tooth part 1231 on the holding surface 127 of the boss 123 is meshed with the gear in the opening assembly 20, so as to drive the opening assembly 20 to move, and the opening assembly 20 is in a conducting state, namely, the circuit breaker 10 is in a closing state.
In summary, the fixing and unlocking mechanism and the circuit breaker 10 provided in the present embodiment have at least the following advantages:
The transmission piece 120 rotates around the axis of the transmission piece under the action of external force, namely rotates around the third rotating shaft, so that the unlocking piece 140 can be driven to rotate, and the locking piece 130 is in an unlocking state; at the same time, the transmission member 120 can also drive the opening assembly 20 to move, so that the circuit breaker 10 is in the opening state. When the circuit breaker 10 is pulled out from the cabinet, the circuit breaker 10 can be ensured to be in a switching-off state, no arc can be generated, and the safety of the circuit breaker 10 and nearby equipment is improved. Second, when the circuit breaker 10 is mounted on the cabinet board 30, the transmission member 120 is only required to rotate reversely, so that the opening assembly 20 is in the conducting state, i.e. the circuit breaker 10 is in the closing state. Meanwhile, the transmission member 120 drives the unlocking member 140 to rotate reversely, so that the locking member 130 is in a locking state under the elastic restoring force of the elastic member 160, and the locking block 131 is locked into the limiting hole 31 of the cabinet board 30. The circuit breaker 10 is simple and compact in structure, ingenious in design, convenient to operate and high in safety performance.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
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|---|---|---|---|
| CN201911001978.9A CN112768306B (en) | 2019-10-21 | 2019-10-21 | Fixing and unlocking mechanism and circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911001978.9A CN112768306B (en) | 2019-10-21 | 2019-10-21 | Fixing and unlocking mechanism and circuit breaker |
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| CN112768306A CN112768306A (en) | 2021-05-07 |
| CN112768306B true CN112768306B (en) | 2024-09-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN210489553U (en) * | 2019-10-21 | 2020-05-08 | 上海良信电器股份有限公司 | Fixing and unlocking mechanism and circuit breaker |
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| CN107833799B (en) * | 2017-10-26 | 2024-09-20 | 上海良信电器股份有限公司 | A fixing and unlocking mechanism for plug-in circuit breaker |
| CN109599303B (en) * | 2018-12-28 | 2023-10-24 | 浙江正泰电器股份有限公司 | Small-sized circuit breaker |
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| CN210489553U (en) * | 2019-10-21 | 2020-05-08 | 上海良信电器股份有限公司 | Fixing and unlocking mechanism and circuit breaker |
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