CN113782359B - Motor protector with auxiliary device - Google Patents
Motor protector with auxiliary device Download PDFInfo
- Publication number
- CN113782359B CN113782359B CN202111138664.0A CN202111138664A CN113782359B CN 113782359 B CN113782359 B CN 113782359B CN 202111138664 A CN202111138664 A CN 202111138664A CN 113782359 B CN113782359 B CN 113782359B
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- Prior art keywords
- tripping
- piece
- auxiliary device
- driving
- deflector rod
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- 230000001012 protector Effects 0.000 title claims abstract description 112
- 230000007246 mechanism Effects 0.000 claims abstract description 78
- 238000012360 testing method Methods 0.000 claims description 34
- 230000005540 biological transmission Effects 0.000 claims description 15
- 230000033001 locomotion Effects 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 230000001960 triggered effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 description 9
- 238000013461 design Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0854—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load responsive to rate of change of current, couple or speed, e.g. anti-kickback protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/09—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against over-voltage; against reduction of voltage; against phase interruption
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Breakers (AREA)
Abstract
The invention discloses a motor protector with an auxiliary device, which comprises a protector body and the auxiliary device, wherein a first through hole is formed in one side of the protector body, the auxiliary device comprises an opening and closing deflector rod extending into the first through hole, an operating mechanism is arranged in the protector body, the operating mechanism comprises a tripping lever provided with a driving groove structure, one end of the opening and closing deflector rod penetrates into the driving groove structure, when the operating mechanism performs switching-on or switching-off, the tripping lever is driven to rotate forward or reversely, and the opening and closing deflector rod is driven to switch between a first position and a second position through the driving groove structure, so that normally open contact groups and normally closed contact groups on the auxiliary device are controlled to perform switching-on and switching-off alternately.
Description
Technical Field
The invention relates to the technical field of motor protectors, in particular to a motor protector with an auxiliary device.
Background
The motor protector is used for infrequent starting and overload protection and short-circuit protection of the motor, and other functions for safety protection, motor operation characteristics control and the like are required to be added besides the basic switch function for controlling the starting/stopping of the motor, for example, the motor protector is usually required to have the short-circuit protection and overload protection functions, when the motor starter is connected into a protected circuit, and when overload or phase failure occurs in the load, a bimetallic strip in an overload release is heated and bent for a certain stroke to drive an operating mechanism in the motor protector to release, so that the overload protection function is realized by disconnecting the circuit; when the load is in short circuit, short circuit current flows through the coil inside the electromagnetic release to drive the iron core to act instantaneously so as to drive the operating mechanism inside the motor protector to release, thereby playing a role in short circuit protection. Although the motor protector can perform overload and short-circuit protection on the motor, the existing motor protector still has the following problems in the actual use process: firstly, the motor protector can only observe the working state of the motor protector on site, but can not detect the starting and stopping working states of the motor protector conveniently in real time, and does not have the signal external detection function; secondly, the existing motor protector is limited by structure and lacks of interlocking control protection to the motor, so that a group of relays are additionally arranged on a control line of the motor, the line connection is complex, and the setting cost is high.
Disclosure of Invention
Therefore, the invention aims to overcome the defects in the prior art, thereby providing the motor protector which can conveniently detect the working state information of a product, realize the signal external detection function, can also be used for motor interlocking control protection and reduce the setting cost.
In order to solve the technical problems, the invention provides a motor protector with an auxiliary device, which comprises a protector body and the auxiliary device arranged on one side of the protector body, wherein a contact mechanism and an operating mechanism are arranged in the protector body, and the operating mechanism drives the contact mechanism to be switched on or off so as to realize switching-off or switching-on operation:
The auxiliary device comprises at least one normally open contact group and at least one normally closed contact group, and an opening and closing deflector rod which is respectively connected with the normally open contact group and the normally closed contact group, wherein the opening and closing deflector rod penetrates through the outer side wall of one side of the auxiliary device and is provided with a first position for driving the normally open contact group and the normally closed contact group to be opened and closed and a second position for driving the normally open contact group and the normally closed contact group to be closed and opened;
The protector comprises a protector body, wherein one side of the protector body is provided with a first through hole for the opening and closing deflector rod to penetrate, the operating mechanism comprises a tripping lever connected with the opening and closing deflector rod, a driving groove structure with an opening facing the first through hole is arranged on the tripping lever, and one end of the opening and closing deflector rod extends into the driving groove structure; the tripping lever rotates forward and backward respectively when the operating mechanism performs switching-on and switching-off operations, and the driving groove structure drives the switching-on and switching-off deflector rod to switch between a first position and a second position.
In the motor protector, the driving groove structure is of a C-shaped structure, two tip protrusions are oppositely arranged at the port of the driving groove structure, and the opening and closing deflector rod is pushed by the tip protrusions in the rotation process of the tripping lever.
In the motor protector, the operating mechanism comprises a locking piece and a tripping piece which are rotatably arranged on the bracket, the locking piece and the tripping piece are in a locking state of buckling connection and a tripping state of tripping separation, the locking piece and the tripping lever form linkage fit, and a torsion spring structure is arranged between the tripping lever and the bracket; the operating mechanism executes trip opening when the locking piece and the tripping piece are in a tripping state, so that the tripping lever is driven by the torsion spring structure to reversely rotate to push the moving contact and the fixed contact to be separated.
In the motor protector, the auxiliary device further comprises a reset deflector rod which is in linkage with the opening and closing deflector rod, a second through hole which can be used for the reset deflector rod to extend in is formed in one side of the protector body, a contact protrusion which faces the second through hole is arranged at one end, connected with the tripping lever, of the locking piece, and the reset deflector rod extends into the second through hole and is located on a movement track of the contact protrusion.
In the motor protector, a test tripping structure is arranged between the auxiliary device and the protector body and used for driving the locking piece and the tripping piece to be transited from a locking state to a tripping state.
In the above-mentioned motor protector, the test trip structure includes:
The test deflector rod is arranged on one side wall of the auxiliary device in a penetrating way, and an operation hole for driving the test deflector rod to move is formed in the other side wall of the auxiliary device;
The third through hole is arranged at one side of the protector body and can be penetrated by the test deflector rod;
The linkage piece can move up and down and is arranged on the support and is in linkage fit with the tripping piece, a first driving bevel edge matched with the test deflector rod is arranged on one side edge of the linkage piece, and the linkage piece drives the tripping piece to rotate when the test deflector rod slides and is pressed against the first driving bevel edge.
In the motor protector, the locking piece, the tripping piece and the linkage piece are respectively arranged at two sides of the bracket at intervals, an abutting surface structure is arranged between the tripping piece and the locking piece, the tripping piece comprises a convex rod structure penetrating between the bracket and the linkage piece, and the linkage piece is provided with a linkage hole hung and sleeved on the convex rod structure; the bracket is provided with an arc-shaped guide hole through which the convex rod structure can pass.
In the motor protector, the under-voltage tripping device is arranged on the other side of the protector body, the under-voltage tripping device is provided with an under-voltage driving rod which performs reciprocating motion when triggered, the under-voltage driving rod penetrates into the protector body from the side wall of the under-voltage tripping device, a second driving bevel edge matched and propped against the under-voltage driving rod is arranged on the other side edge of the linkage piece, and the linkage piece drives the tripping piece to transition from a locking state to a tripping state when the second driving bevel edge is propped against by the under-voltage driving rod.
In the motor protector, a thermal overload mechanism and an electromagnetic tripping mechanism for driving the operating mechanism to execute tripping and opening are also arranged in the protector body; three groups of moving contacts and static contacts are arranged in the protector body, contact springs are arranged between the moving contacts and the protector body, and the contact springs apply elastic force to the moving contacts, wherein the elastic force moves in the direction close to the static contacts; the thermal overload mechanism includes: the double-metal strip is characterized in that the double-metal strip comprises a plurality of heat conducting plate components and a plurality of bimetallic strips, the plurality of heat conducting plate components are arranged on the plurality of groups of the fixed contacts in an extending mode along the length direction of the fixed contacts, the plurality of bimetallic strips are vertically inserted into the plurality of heat conducting plate components, and a transmission assembly for driving the tripping element to rotate is arranged on a heated and bent driving end of the bimetallic strips.
In the above motor protector, the electromagnetic trip mechanism includes: the positioning frame is erected on the heat conducting plate component, the electromagnetic coil structure is arranged on the positioning frame along the direction perpendicular to the heat conducting plate component, and the tilting piece is arranged on the positioning frame in a rotating way through the rotating shaft; the tilting piece is provided with a hook end which is hooked on the linkage piece and a driven end which is positioned below the electromagnetic coil structure in an extending mode, and a notch is formed in the driven end; the electromagnetic coil structure is provided with a trigger rod which penetrates into the notch and forms limit fit with the driven end, and the trigger rod drives the tilting piece to rotate around the shaft when the electromagnetic tripping mechanism is triggered, so that the linkage piece is driven by the tilting piece to drive the tripping piece to rotate.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. When the motor protector with the auxiliary device is required to be started, the contact mechanism is driven to be switched on through the operating mechanism so as to realize switching-on operation, and meanwhile, the tripping lever drives the switching-on/off deflector rod on the auxiliary device to move from the first position to the second position through the driving groove structure (at the moment, the normally open contact group is closed and the normally closed contact group is opened); when the motor protector is required to be stopped to be closed, the contact mechanism is driven to be disconnected through the operating mechanism so as to realize the opening operation, meanwhile, the tripping lever is used for poking the opening and closing poking rod through the driving groove structure to move from the second position to the first position (at this time, the normally open contact group is opened, and the normally closed contact group is closed), so that the design has the advantages that the alternate closing and opening between the normally open contact group and the normally closed contact group of the auxiliary device are controlled by the closing and opening operation of the motor protector, the operation synchronism is good, the normally open contact group and the normally closed contact group on the auxiliary device can be externally connected with an indicating device, the motor protector can be accurately judged to be in a closing state or an opening state according to two groups of indication signals sent by the indicating device, the working state of the motor protector can be effectively observed or detected in real time, the signal external detection function is realized, obviously, the electric interlocking control can be realized through the normally open contact group and the normally closed contact group, the electric short circuit accident is prevented from happening to the motor, the setting cost is reduced, the multiple use functions of the motor protector can be expanded through the configuration of the auxiliary device, the safety and the reliability of the product in working are improved, and the service performance of the product is guaranteed.
2. The motor protector with the auxiliary device provided by the invention has the advantages that the driving groove structure is of a C-shaped structure, and the two tip protrusions are oppositely arranged at the port of the driving groove structure, the C-shaped notch of the driving groove structure is arranged towards the first through hole, so that the opening and closing deflector rod can accurately extend into the driving groove structure after passing through the first through hole, and the opening and closing deflector rod can be positively or reversely rotated when the operating mechanism is switched on or off according to the tripping lever, so that the opening and closing deflector rod is pushed to make a back-and-forth switching motion between the first position and the second position through the two tip protrusions, and the normally open contact group and the normally closed contact group are respectively and alternately in an opening and a closing state.
3. The motor protector with the auxiliary device provided by the invention is used for testing whether the motor protector can normally drive the normally open contact group and the normally closed contact group of the auxiliary device to open and close through the test tripping structure, when the auxiliary device is subjected to tripping test, the test shifting lever is driven to act through the operation hole of the auxiliary device by a tool, the test shifting lever is in sliding and propped against the first driving inclined edge to drive the linkage piece to drive the tripping piece to rotate, so that the tripping piece and the locking piece are transited to the tripping state from the locking state, the tripping opening of the operating mechanism is realized, the tripping lever is opened and rotated under the action of the torsion spring structure after the balance force is lost, the normally open contact group and the normally closed contact group of the auxiliary device are respectively restored to the initial state through the driving groove structure, the matching transmission is reliable, the tripping sensitivity is high, and the design can detect the functions of the contact group of the auxiliary device, and the situation that the auxiliary device and the protector body cannot be used in normal matching is avoided.
4. According to the motor protector with the auxiliary device, the under-voltage tripping device is arranged on the other side of the protector body, when under-voltage faults occur to a circuit, the under-voltage tripping device is pressed against the second driving bevel edge of the linkage piece in a sliding mode through the under-voltage driving rod, so that the linkage piece drives the tripping piece to transition from a locking state to a tripping state in the pressed moving process, the operating mechanism is enabled to perform tripping and opening actions, tripping of the motor protector is achieved, the circuit is cut off, and under-voltage protection effects are achieved on the circuit and electrical equipment.
5. In the motor protector with the auxiliary device, when a circuit has a short circuit fault, namely the electromagnetic coil structure is triggered, the trigger rod is driven to move upwards in the direction away from the heat conducting plate component, the trigger rod applies thrust to the driven end to drive the tilting piece to rotate around the shaft, the hook end of the tilting piece drives the linkage piece to move, the lever principle of the tilting piece is utilized to realize the transmission of motion and force between the linkage piece and the electromagnetic coil structure, the structural design is reasonable, the matching transmission is reliable, the linkage piece is enabled to drive the trip piece to transition from a locking state to a trip state in the process of being pressed and moved, the trip and break action of the operating mechanism is realized, and the motor protector has a short circuit protection function and good use safety.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a motor protector provided with an auxiliary device according to the present invention;
FIG. 2 is a side view of the protector body of the present invention;
FIG. 3 is a schematic view of an auxiliary device according to the present invention;
FIG. 4 is a schematic view of the motor protector of the present invention with a hidden portion of the housing;
FIG. 5 is a side view of the motor protector of FIG. 4, particularly illustrating a thermal overload mechanism;
FIG. 6 is a schematic diagram of an installation structure of the electromagnetic trip mechanism of the present invention;
FIG. 7 is a schematic view of the operating mechanism of the present invention;
reference numerals illustrate: 1. a protector body; 11. a first through hole; 12. a second through hole; 13. a third through hole; 2. an operating mechanism; 20. a bracket; 21. a trip lever; 22. a drive slot structure; 221. a tip protrusion; 23. a locking piece; 24. removing the fastener; 25. a torsion spring structure; 26. a contact protrusion; 27. a protruding rod structure; 3. an auxiliary device; 30. an operation hole; 31. a normally open contact set; 32. a normally closed contact group; 33. an opening and closing deflector rod; 34. resetting the deflector rod; 35. a test deflector rod; 4. a linkage piece; 41. a first driving bevel; 42. a second driving bevel edge; 43. a locking hole; 5. an undervoltage trip device; 6. a thermal overload mechanism; 61. bimetallic strips; 62. a heat conductive plate member; 63. a transmission assembly; 7. an electromagnetic coil structure; 71. a positioning frame; 8. a tilting member; 81. a driven end; 82. a hooked end; 83. notching; 9. and a contact mechanism.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. 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.
In the description of the present invention, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
The present embodiment is specifically described below with reference to the accompanying drawings:
The embodiment provides a motor protector provided with an auxiliary device 3 as shown in figures 1-7, which comprises a protector body 1 and the auxiliary device 3 arranged on one side of the protector body 1, wherein a contact mechanism 9 and an operating mechanism 2 are arranged in the protector body 1, and the operating mechanism 2 drives the contact mechanism 9 to be switched on or off so as to realize switching-off or switching-on operation;
The auxiliary device 3 comprises a group of normally open contact groups 31 and a group of normally closed contact groups 32 and an opening and closing deflector rod 33 respectively connected with the normally open contact groups 31 and the normally closed contact groups 32, wherein the opening and closing deflector rod 33 penetrates through the outer side wall of one side of the auxiliary device 3 and is provided with a first position for driving the normally open contact groups 31 and the normally closed contact groups 32 to be respectively opened and closed and a second position for driving the normally open contact groups 31 and the normally closed contact groups 32 to be respectively closed and opened;
A first through hole 11 through which the opening and closing deflector rod 33 penetrates is formed in one side of the protector body 1, the operating mechanism 2 comprises a tripping lever 21 connected with the opening and closing deflector rod 33, a driving groove structure 22 with an opening facing the first through hole 11 is formed in the tripping lever 21, and one end of the opening and closing deflector rod 33 extends into the driving groove structure 22; the trip lever 21 rotates in the forward direction and the reverse direction when the operating mechanism 2 performs the switching-on and switching-off operation, and drives the switching-on/switching-off deflector 33 to switch between the first position and the second position through the driving slot structure 22.
In the above embodiment, when the motor protector needs to be started, the contact mechanism 9 is driven to be switched on by the operating mechanism 2 to realize the switching-on operation, and meanwhile, the trip lever 21 drives the switching-on/off deflector 33 on the auxiliary device 3 to move from the first position to the second position by the driving slot structure 22 (at this time, the normally open contact group 31 is closed, and the normally closed contact group 32 is opened); when the motor protector is required to be stopped to be closed, the contact mechanism 9 is driven to be disconnected through the operating mechanism 2 so as to realize the opening operation, meanwhile, the opening and closing deflector rod 33 is stirred by the tripping lever 21 through the driving groove structure 22 to move from the second position to the first position (at the moment, the normally open contact group 31 is opened, and the normally closed contact group 32 is closed), so that the design has the advantages that the alternate closing and opening between the normally open contact group 31 and the normally closed contact group 32 of the auxiliary device 3 are controlled by the closing and opening operation of the motor protector, the operation synchronism is good, the normally open contact group 31 and the normally closed contact group 32 on the auxiliary device 3 can be externally connected with an indicating device, the motor protector can be accurately judged to be in the closing state or the opening state according to two groups of indication signals sent by the indicating device, the working state of the motor protector can be effectively observed or detected in real time, the signal external detection function is realized, and obviously, the electric interlocking control can be realized through the normally open contact group 32, the motor is prevented from generating electric short-circuit accidents, thus, the setting cost is reduced, various use functions of the motor protector can be expanded through the auxiliary device 3, the safety and the reliability of the product are improved.
As a preferred embodiment, referring to fig. 7, the driving slot structure 22 has a C-shaped structure, two tip protrusions 221 are disposed opposite to each other at the ports of the driving slot structure, and the opening/closing lever 33 is pushed by the tip protrusions 221 during the rotation of the trip lever 21. The structure is that the C-shaped notch of the driving groove structure 22 is arranged towards the first through hole 11, so that the opening and closing deflector rod 33 can accurately extend into the driving groove structure 22 after penetrating through the first through hole 11, and the opening and closing deflector rod 33 is pushed to move back and forth between a first position and a second position by two tip protrusions 221 according to forward or reverse rotation of the tripping lever 21 when the operating mechanism 2 performs switching-on or switching-off, so that the normally open contact group 31 and the normally closed contact group 32 are respectively and alternately in an opening and closing state.
The specific structure of the operating mechanism 2 is described in detail below with reference to fig. 3-7:
The operating mechanism 2 comprises a locking piece 23, a tripping piece 24 and a driving wheel which are rotatably arranged on the bracket 20, wherein the locking piece 23 and the tripping piece 24 are in a locking state of being in buckling connection and a tripping state of being separated; the driving wheel is rotationally connected with the locking piece 23 through a transmission rod, the locking piece 23 and the tripping lever 21 form linkage fit, and a torsion spring structure 25 is arranged between the tripping lever 21 and the bracket 20; the operating mechanism 2 performs trip opening when the locking piece 23 and the tripping piece 24 are in a tripping state, so that the tripping lever 21 is driven by the torsion spring structure 25 to push the moving contact and the fixed contact in the contact mechanism 9 to separate. The contact mechanism 9 in this embodiment is disposed below the operating mechanism 2 and is in transmission connection with the operating mechanism 2 through contact support, the contact mechanism 9 includes a moving contact 91 and a fixed contact 92 which are opposite up and down, the moving contact 91 is disposed in the protector housing through contact support movement, and a contact spring is disposed between the moving contact 91 and the protector housing, and the contact spring applies an elastic force to the moving contact which moves in a direction approaching to the fixed contact. Therefore, when the contact support and the moving contact are subjected to the thrust action from the tripping lever 21, the moving contact moves in the direction away from the fixed contact, so that the opening operation of the operating mechanism 2 is realized; when the tripping lever 21 rotates forward, pushing force is not applied to the moving contact any more, and the moving contact is reset and moves upwards to be in contact with the fixed contact under the action of the contact spring, so that the closing operation of the operating mechanism 2 is realized.
In order to implement a reset operation on the opening/closing lever 33, as shown in fig. 2-3, the auxiliary device 3 further includes a reset lever 34 that is disposed in linkage with the opening/closing lever 33, a second through hole 12 into which the reset lever 34 extends is disposed on one side of the protector body 1, a contact protrusion 26 facing the second through hole 12 is disposed on an end of the latch member 23 connected to the trip lever 21, the reset lever 34 extends into the second through hole 12 and is located on a movement track of the contact protrusion 26, and in this structural arrangement, the operating mechanism 2 drives the latch member 23 to rotate for a certain stroke when executing the opening/closing operation, and the contact protrusion 26 pushes the reset lever 34 to act in a rotation process along with the latch member 23, so that the opening/closing lever 33 moves from the second position to the first position.
In this embodiment, as shown in fig. 2-4, a test trip structure is disposed between the auxiliary device 3 and the protector body 1, and the test trip structure is used to drive the latch member 23 and the trip member 24 to transition from the locking state to the trip state, so that the trip lever 21 drives the opening/closing driving lever 33 to move from the second position to the first position.
As a specific structural arrangement, the test tripping structure comprises a test deflector rod 35, a linkage piece 4 and a third through hole 13 which is arranged on one side of the protector body 1 and can be penetrated by the test deflector rod 35, wherein the test deflector rod 35 is movably penetrated on one side wall of the auxiliary device 3, and an operation hole 30 for driving the test deflector rod 35 to move is arranged on the other side wall of the auxiliary device 3; the linkage piece 4 can move up and down and is arranged on the support 20 and is in linkage fit with the tripping piece 24, a first driving bevel edge 41 matched with the test deflector 35 is arranged on one side edge of the linkage piece 4, and the linkage piece 4 drives the tripping piece to rotate when the test deflector 35 slides and is pressed against the first driving bevel edge 41. According to the above structure, the test trip structure is used for testing whether the motor protector can normally drive the normally open and normally closed contact group 32 of the auxiliary device 3 to open and close, when the auxiliary device 3 is in trip test, a tool is used for driving the test deflector rod 35 to act through the operation hole 30, the test deflector rod 35 is slidably pressed against the first driving bevel edge 41 to drive the linkage piece 4 to drive the trip piece to rotate, so that the trip piece 24 and the locking piece 23 are transited from a locking state to a trip state, the trip release of the operating mechanism 2 is realized, the trip lever 21 at the moment reversely rotates under the action of the torsion spring structure 25 after losing the balance force, the drive slot structure 22 pushes the open and close deflector rod 33 to move, so that the normally open and normally closed contacts of the auxiliary device 3 are respectively restored to the initial state, the matching transmission is reliable, the trip sensitivity is high, the function of the contact group of the auxiliary device 3 can be detected, and the situation that the auxiliary device 3 cannot be matched with the protector body 1 normally is avoided can be designed.
As shown in fig. 6-7, the locking piece 23 and the releasing piece 24 are respectively arranged at two sides of the bracket 20 at intervals, an abutting surface structure is arranged between the releasing piece 24 and the locking piece 23, the locking piece 23 and the releasing piece 24 keep locking fit through the locking surface structure, the releasing piece 24 comprises a convex rod structure 27 penetrating between the bracket 20 and the linkage piece 4, the linkage piece 4 is provided with a linkage hole 43 hanging and sleeved on the convex rod structure 27, the bracket 20 is provided with an arc-shaped guide hole through which the convex rod structure 27 can penetrate, the arc-shaped guide hole is used for guiding the movement of the convex rod structure 27, the convex rod structure 27 is driven to move along the arc-shaped guide hole when the linkage piece 4 moves downwards under the force, the releasing separation of the releasing piece 24 and the locking piece 23 is realized, and the linkage piece 4 is driven to move back to the initial position upwards through the convex rod structure 27 when the releasing piece 24 rotates and resets.
In order to realize the under-voltage protection function of the motor protector, as shown in fig. 1, an under-voltage tripping device 5 is mounted on the other side of the protector body 1, the under-voltage tripping device 5 is provided with an under-voltage driving rod which performs reciprocating motion when triggered, the under-voltage driving rod penetrates out of the side wall of the under-voltage tripping device 5 and penetrates into the protector body 1, a second driving bevel edge 42 matched and abutted with the under-voltage driving rod is arranged on the other side edge of the linkage piece 4, when an under-voltage fault occurs on a circuit, the under-voltage tripping device 5 slides and abuts against the second driving bevel edge 42 of the linkage piece 4 through the under-voltage driving rod, and when the second driving bevel edge 42 is abutted and pressed by the under-voltage driving rod, the linkage piece 4 drives the tripping piece 24 to transition from a locking state to a tripping state, so that the operating mechanism 2 is in a tripping action, thereby realizing tripping of the motor protector to cut off the circuit and playing the role of under-voltage protection on the circuit and electrical equipment.
The motor protector provided in this embodiment has overload protection and short-circuit protection functions, and for this purpose, a thermal overload mechanism 6 and an electromagnetic tripping mechanism for driving the operating mechanism 2 to perform tripping and opening are further disposed in the protector body 1. The specific arrangement of the thermal overload mechanism 6 and the electromagnetic trip mechanism will be described in detail with reference to fig. 4 to 6:
In order to meet the design requirement of the three-phase line, the moving contact and the fixed contact are provided with three groups in the protector body 1, and the thermal overload mechanism 6 comprises: the three heat conducting plate parts 62 arranged on the three groups of the fixed contacts in an extending manner along the length direction of the fixed contacts, and the three bimetallic strips 61 vertically inserted into the plurality of the heat conducting plate parts 62 are provided with transmission components 63 used for driving the tripping pieces 24 to rotate at the heated and bent driving ends of the three bimetallic strips 61, the transmission components consist of a plurality of transmission plates matched in a linkage manner, the heat is transferred between the fixed contacts and the bimetallic strips 61 through the heat conducting plate parts 62, when overload faults occur on any phase of lines, the bimetallic strips 61 on the corresponding phase lines are heated to generate bending actions and drive the transmission components 63 to move, and then the transmission components 63 drive the tripping pieces 24 to rotate, so that the tripping pieces 24 are tripped and separated from the locking pieces 23, and the tripping and opening of the motor protector is realized, so that the overload protection effect is achieved.
The electromagnetic trip mechanism includes: a positioning frame 71 erected on the heat conducting plate member 62, an electromagnetic coil structure 7 provided on the positioning frame 71 in a direction perpendicular to the heat conducting plate member 62, and a tilting member 8 provided on the positioning frame 71 to be rotated by a rotation shaft; the tilting member 8 is provided with a hook end 82 hooked on the linkage piece 4 and a driven end 81 extending below the electromagnetic coil structure 7, and the driven end 81 is provided with a notch 83; the electromagnetic coil structure 7 is provided with a trigger rod (trigger rod is not shown in the drawing) penetrating into the notch 83 to form limit fit with the driven end 81, and the trigger rod drives the tilting member 8 to rotate around the shaft when the electromagnetic tripping mechanism is triggered, so that the linkage piece 4 is driven by the tilting member 8 to drive the tripping member 24 to rotate. This kind of structure sets up, when the circuit takes place short circuit trouble, promptly for the electromagnetic coil structure 7 is triggered the actuating lever moves upwards towards keeping away from the direction of heat conduction board part 62, exerts thrust in order to drive through the actuating lever to driven end 81 the perk piece 8 rotates around the axle, and then by the crotch end 82 drive of perk piece 8 linkage piece 4 moves down, utilizes the lever principle of perk piece 8 to realize transmitting motion and power between linkage piece 4 and electromagnetic coil structure 7, and structural design is reasonable, and the cooperation transmission is reliable to make linkage piece 4 drive release piece 24 and pass through to the trip state by the locking state in the pressurized removal in-process, realize operating device 2's tripping brake-separating action, make motor protector play short-circuit protection, and the safety in utilization is good.
The auxiliary device 3 is fixed on one side of the protector body 1 through a mounting structure, the mounting structure comprises two mounting hooks arranged at two ends of the side face of the auxiliary device 3 and two strip-shaped clamping grooves correspondingly arranged on one side of the protector body 1, the mounting hooks are clamped at the inner end positions of the strip-shaped clamping grooves, the mounting structure further comprises a plurality of positioning clamping tables arranged on the side face of the auxiliary device 3 and a plurality of positioning clamping holes correspondingly arranged on one side of the protector body 1 and suitable for being inserted into the positioning clamping tables, the auxiliary device 3 plays a positioning and mounting role on one side of the protector body 1 through the matching of the positioning clamping tables and the positioning clamping holes, and the auxiliary device 3 and the protector body 1 are enabled to keep fixed in mounting positions through the clamping matching of the mounting hooks and the strip-shaped clamping grooves, so that the mounting structure is simple and convenient to mount, and the matching is reliable.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (6)
1. The utility model provides a motor protector who is furnished with auxiliary device, includes protector body (1) and installs auxiliary device (3) of protector body (1) one side, be equipped with contact mechanism (9) and operating device (2) in protector body (1), operating device (2) drive contact mechanism (9) switch-on or break off in order to realize opening or closing operation, its characterized in that:
The auxiliary device (3) comprises at least one group of normally open contact groups (31) and at least one group of normally closed contact groups (32), and an opening and closing deflector rod (33) respectively connected with the normally open contact groups (31) and the normally closed contact groups (32), wherein the opening and closing deflector rod (33) penetrates through the outer side wall of one side of the auxiliary device and is provided with a first position for driving the normally open contact groups (31) and the normally closed contact groups (32) to be respectively opened and closed, and a second position for driving the normally open contact groups (31) and the normally closed contact groups (32) to be respectively closed and opened;
A first through hole (11) through which the opening and closing deflector rod (33) penetrates is formed in one side of the protector body (1), the operating mechanism (2) comprises a tripping lever (21) connected with the opening and closing deflector rod (33), a driving groove structure (22) with an opening facing the first through hole (11) is arranged on the tripping lever (21), and one end of the opening and closing deflector rod (33) extends into the driving groove structure (22); the tripping lever (21) rotates forwards and backwards respectively when the operating mechanism (2) performs switching-on and switching-off operations, and drives the switching-on/switching-off deflector rod (33) to switch between a first position and a second position through the driving groove structure (22); the driving groove structure (22) is of a C-shaped structure, two tip protrusions (221) are oppositely arranged at the port of the driving groove structure, and the opening and closing deflector rod (33) is pushed by the tip protrusions (221) in the rotating process of the tripping lever (21);
The operating mechanism (2) comprises a locking piece (23) and a tripping piece (24) which are rotatably arranged on the bracket (20), wherein the locking piece (23) and the tripping piece (24) are in a locking state of buckling connection and a tripping state of unbuckling separation; the locking piece (23) and the tripping lever (21) form linkage fit, and a torsion spring structure (25) is arranged between the tripping lever (21) and the bracket (20); the operating mechanism (2) executes trip opening when the locking piece (23) and the tripping piece (24) are in a tripping state, so that the tripping lever (21) is driven by the torsion spring structure (25) to push a moving contact and a fixed contact in the contact mechanism (9) to be separated;
Be provided with between auxiliary device (3) and protector body (1) and be used for driving hasp piece (23) and tripping part (24) are by locking state transition to the test tripping structure of tripping state, test tripping structure includes:
The test deflector rod (35) is arranged on one side wall of the auxiliary device (3) in a penetrating way, and an operation hole (30) for driving the test deflector rod (35) to move is formed in the other side wall of the auxiliary device (3);
A third through hole (13) is arranged at one side of the protector body (1) and can be penetrated by the test deflector rod (35);
The linkage piece (4) can move up and down, is arranged on the support (20) and is in linkage fit with the tripping piece (24), a first driving bevel edge (41) matched with the test deflector rod (35) is arranged on one side edge of the linkage piece (4), and the linkage piece (4) drives the tripping piece to rotate when the test deflector rod (35) slides and is pressed against the first driving bevel edge (41).
2. The motor protector equipped with an auxiliary device according to claim 1, characterized in that: the auxiliary device (3) further comprises a reset deflector rod (34) which is arranged in linkage with the opening and closing deflector rod (33), a second through hole (12) which can be used for the reset deflector rod (34) to extend in is formed in one side of the protector body (1), a contact protrusion (26) which faces the second through hole (12) is arranged at one end, connected with the release lever (21), of the locking piece (23), and the reset deflector rod (34) extends into the second through hole (12) and is located on the movement track of the contact protrusion (26).
3. The motor protector equipped with an auxiliary device according to claim 1, characterized in that:
the locking piece (23) and the releasing piece (24) are respectively arranged on two sides of the support (20) at intervals, an abutting surface structure is arranged between the releasing piece (24) and the locking piece (23), the releasing piece (24) comprises a protruding rod structure (27) penetrating between the support (20) and the linkage piece (4), the linkage piece (4) is provided with a linkage hole (43) hanging and sleeved on the protruding rod structure (27), and an arc-shaped guide hole allowing the protruding rod structure (27) to penetrate is arranged on the support (20).
4. A motor protector provided with an auxiliary device according to claim 3, characterized in that: the under-voltage tripping device (5) is arranged on the other side of the protector body (1), the under-voltage tripping device (5) is provided with an under-voltage driving rod which performs reciprocating motion when triggered, the under-voltage driving rod penetrates out of the side wall of the under-voltage tripping device (5) and stretches into the protector body (1), a second driving bevel edge (42) which is matched and propped against the under-voltage driving rod is arranged on the other side edge of the linkage piece (4), and the linkage piece (4) drives the tripping piece (24) to transition from a locking state to a tripping state when the second driving bevel edge (42) is propped against by the under-voltage driving rod.
5. The motor protector equipped with an auxiliary device according to any one of claims 1 to 4, characterized in that: a thermal overload mechanism (6) and an electromagnetic tripping mechanism for driving the operating mechanism (2) to execute tripping and opening are also arranged in the protector body (1); three groups of moving contacts and fixed contacts are arranged in the protector body (1); the thermal overload mechanism (6) comprises: the double-metal-sheet-type trip device comprises a plurality of heat conducting plate components (62) which are horizontally arranged on a plurality of groups of static contacts in an extending mode, and a plurality of double-metal sheets (61) which are vertically inserted into the plurality of heat conducting plate components (62), wherein a transmission component (63) for driving the trip piece (24) to rotate is arranged on a heated and bent driving end of the double-metal sheets (61).
6. The motor protector equipped with an auxiliary device according to claim 5, characterized in that: the electromagnetic trip mechanism includes: a positioning frame (71) erected on the heat conducting plate member (62), an electromagnetic coil structure (7) arranged on the positioning frame (71) along the extending direction perpendicular to the heat conducting plate member (62), and a tilting member (8) arranged on the positioning frame (71) and rotated by a rotating shaft; the tilting piece (8) is provided with a hook end (82) hooked on the linkage piece (4) and a driven end (81) extending below the electromagnetic coil structure (7), and a notch (83) is formed in the driven end (81); the electromagnetic coil structure (7) is provided with a trigger rod penetrating into the notch (83) to form limit fit with the driven end (81), and the trigger rod drives the tilting piece (8) to rotate around a shaft when the electromagnetic tripping mechanism is triggered, so that the linkage piece (4) is driven by the tilting piece (8) to drive the tripping piece (24) to rotate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111138664.0A CN113782359B (en) | 2021-09-27 | 2021-09-27 | Motor protector with auxiliary device |
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|---|---|---|---|
| CN202111138664.0A CN113782359B (en) | 2021-09-27 | 2021-09-27 | Motor protector with auxiliary device |
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| CN113782359A CN113782359A (en) | 2021-12-10 |
| CN113782359B true CN113782359B (en) | 2024-09-20 |
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| CN215933411U (en) * | 2021-09-27 | 2022-03-01 | 浙江人民电器有限公司 | Motor protector with auxiliary device |
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| KR100263698B1 (en) * | 1997-11-28 | 2000-08-01 | 이종수 | Auxiliary switch for molded case circuit breaker |
| FR2777694B1 (en) * | 1998-04-17 | 2000-05-26 | Schneider Electric Ind Sa | AUXILIARY SIGNALING BLOCK ADAPTABLE TO A PROTECTION CIRCUIT BREAKER |
| DE10216439B4 (en) * | 2002-04-12 | 2011-02-24 | Abb Ag | auxiliary switch |
| CN107359086B (en) * | 2016-05-10 | 2019-11-29 | 上海诺雅克电气有限公司 | The indicating fault auxiliary contact of breaker |
| CN208336124U (en) * | 2018-05-08 | 2019-01-04 | 施耐德电器工业公司 | Breaker and safe auxiliary body for breaker |
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| CN215933411U (en) * | 2021-09-27 | 2022-03-01 | 浙江人民电器有限公司 | Motor protector with auxiliary device |
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