CN108538671B - Power supply change-over switch - Google Patents
Power supply change-over switch Download PDFInfo
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- CN108538671B CN108538671B CN201810642089.XA CN201810642089A CN108538671B CN 108538671 B CN108538671 B CN 108538671B CN 201810642089 A CN201810642089 A CN 201810642089A CN 108538671 B CN108538671 B CN 108538671B
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- rotating shaft
- operation rotating
- piece
- positioning arm
- reversing
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- 230000007246 mechanism Effects 0.000 claims abstract description 94
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 32
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- 230000009471 action Effects 0.000 abstract description 7
- 230000009347 mechanical transmission Effects 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/04—Cases; Covers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/18—Movable parts; Contacts mounted thereon
- H01H21/22—Operating parts, e.g. handle
- H01H21/24—Operating parts, e.g. handle biased to return to normal position upon removal of operating force
- H01H21/28—Operating parts, e.g. handle biased to return to normal position upon removal of operating force adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/18—Movable parts; Contacts mounted thereon
- H01H21/36—Driving mechanisms
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Mechanisms For Operating Contacts (AREA)
Abstract
The invention discloses a power supply change-over switch, which comprises a shell, wherein two groups of contact mechanisms and two sets of reversing mechanisms are arranged on the shell, each set of reversing mechanism comprises an operation rotating shaft, and each operation rotating shaft drives one group of contact mechanisms to be switched on and off; each operation rotating shaft is fixedly connected with a reversing piece, a guide through hole is formed in the middle of the reversing piece, an electromagnetic coil is fixed on the shell, a reset pressure spring and a movable iron core are arranged in the center hole of the electromagnetic coil, one end of the movable iron core is connected with the reset pressure spring, the other end of the movable iron core is hinged with one end of a linkage piece through a connecting pin, the other end of the linkage piece is connected with a driving pin, and the driving pin penetrates through or is inserted into the guide through hole; the reset piece is rotatably sleeved on the operation rotating shaft, a U-shaped driving groove is formed in the reset piece, and one end of the driving pin is matched with the U-shaped driving groove; one end of a tension spring is connected with one side of the reset piece far away from the driving pin, and the other end of the tension spring is connected to the shell. The invention has compact structure, good resetting performance of the driving part and higher reliability of switching action.
Description
Technical Field
The present invention relates to a power transfer switch.
Background
The power supply change-over switch is a switching electric appliance for two or more power supplies or load change-over. The change-over switch is widely applied to various places needing uninterrupted power supply, and realizes the change-over of a load circuit between two paths of power supplies so as to ensure the reliability of power supply of a user.
The existing power transfer switch generally needs to be provided with a mechanical reversing mechanism to drive a contact mechanism to switch on and off so as to realize the transfer of a load circuit between two paths of power supplies. The invention patent with the patent number ZL200810005018.5 and the name of 'uninterruptible double power supply change-over switch' is disclosed in 2010 and comprises a shell, a contact opening and closing system and a mechanical transmission system; the structure is characterized in that: the uninterrupted dual-power transfer switch comprises two mechanical transmission systems which are independent of each other and two contact switching systems which are independent of each other, wherein each mechanical transmission system drives one contact switching system which is matched with each mechanical transmission system. The technical problem to be solved is to eliminate the power interruption time and realize uninterrupted dual-power conversion. It can be seen from the description that two independent mechanical transmission systems of the uninterrupted dual-power transfer switch need to be arranged on both sides of the contact mechanism, thus increasing the overall transfer switch length and volume. In addition, the mechanical transmission system comprises a machine base, a limiting plate, a guide ring, guide teeth, a first elastic piece, an electromagnetic power mechanism, a transmission mechanism and a second elastic piece, wherein the limiting plate is fixed on the machine base and provided with a limiting groove; the movable iron core in the electromagnetic power mechanism is fixedly connected with the transmission mechanism. Because the transmission system has more parts and elastic parts, the resetting performance and the reliability of the action of the mechanical transmission system can be greatly tested.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the power supply change-over switch which has compact structure, good reset performance of the driving part and higher reliability of the switching action.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the power supply change-over switch comprises a shell, wherein two groups of contact mechanisms and two sets of reversing mechanisms are arranged on the shell, one group of contact mechanisms enable a load end to be switched on or off with a common power supply end, the other group of contact mechanisms enable the load end to be switched on or off with a standby power supply end, each set of reversing mechanism comprises an operation rotating shaft pivoted on the shell, each operation rotating shaft is fixedly connected with a reversing piece, two limiting protrusions are arranged on the reversing piece, a limiting rod is fixedly arranged on the shell, an electromagnetic coil is fixedly arranged on the shell, a reset pressure spring and a movable iron core are arranged in a central hole of the electromagnetic coil, one end of the movable iron core is connected with the reset pressure spring, the other end of the movable iron core is hinged with one end of a linkage piece through a connecting pin, the other end of the linkage piece is connected with a driving pin, a guide through hole is formed in the middle of the reversing piece, two guide surfaces distributed in a splayed shape are arranged on the inner side surface of the guide through hole, and the driving pin penetrates or is inserted into the guide through hole;
the reset piece is rotatably sleeved on the operation rotating shaft, a U-shaped driving groove or a strip-shaped driving through hole is formed in the reset piece, and one end of the driving pin is matched with the U-shaped driving groove or the strip-shaped driving through hole; one end of a tension spring is connected with one side of the reset piece far away from the driving pin, and the other end of the tension spring is connected with the shell;
when the electromagnetic coil is electrified and the movable iron core is sucked, the movable iron core drives the driving pin to move along one guide surface through the linkage piece and then drives the reversing piece and the operation rotating shaft to rotate clockwise or anticlockwise, so that the contact mechanism is switched on and off, one limiting protrusion on the reversing piece touches the limiting rod to limit the reversing piece and the operation rotating shaft to rotate continuously when the contact mechanism is switched on, and the other limiting protrusion on the reversing piece touches the limiting rod to limit the reversing piece and the operation rotating shaft to rotate continuously when the contact mechanism is switched off; when the electromagnetic coil is powered off, the reset pressure spring drives the movable iron core to reset, and the tension spring drives the driving pin to reset through the reset piece;
two operation rotating shafts on the two sets of reversing mechanisms are parallel to each other, and each operation rotating shaft drives a group of contact mechanisms to switch on and off; each operation rotating shaft is also connected with a positioning mechanism for driving a limiting protrusion on the reversing piece to lean against the limiting rod.
Further improvement, a yielding through hole is formed in the middle of the linkage piece, and the operation rotating shaft penetrates through the yielding through hole; the reversing piece is perpendicular to the operation rotating shaft, and the limiting rod and the driving pin are parallel to the operation rotating shaft; when the bottom surface of the shell is in a horizontal position and the driving pin is in a reset state, the tension spring is in a vertical state. The position arrangement of each part is convenient, and the compactness of the structure is further improved.
Preferably, the reset piece comprises a section of column body, a through hole is formed in the middle of the column body, a section of cantilever which is perpendicular to the column body is extended from the outer side face of the column body, the cantilever is provided with the strip-shaped driving through hole or the U-shaped driving groove, the reset piece is rotatably sleeved on the operation rotating shaft through the through hole in the middle of the column body, and one side of the column body is connected with one end of the tension spring.
Further improved, the two splayed guide surfaces are connected through a section of transition surface, and the two guide surfaces are symmetrically arranged relative to the transition surface; the other sides of the guide through holes, which correspond to the two guide surfaces, are respectively provided with a positioning groove matched with the driving pin when the driving pin resets. The structure is convenient for matching with the driving pin to move, and the reliability of the switching action is further improved.
Further improved, the two linkage pieces are arranged on two sides of the reversing piece, one ends of the two linkage pieces are simultaneously hinged with the other end of the movable iron core through connecting pins, and the driving pins penetrate through the other ends of the two linkage pieces and penetrate through the guide through holes.
Preferably, the positioning mechanism comprises positioning arms fixedly connected with the operation rotating shaft and perpendicular to the operation rotating shaft, one end of each positioning arm is hinged with one end of a compression rod, the other end of each compression rod is connected with a compression spring, the compression spring is sleeved on a sleeve, and one end of the sleeve is hinged on the shell; when the operation rotating shaft drives the contact mechanism to be in opening or closing, a section is made along the radial direction of the operation rotating shaft, the positioning arm rotates to pass through a dead point formed by connecting the center point of the operation rotating shaft, the hinging point of the positioning arm and the compression rod and the hinging point of the sleeve and the shell, and the pressure spring provides a driving force to enable a limiting bulge on the reversing piece to lean against the limiting rod.
Still further improvement, the positioning arms are cam-shaped, the positions of the two positioning arms respectively fixedly connected to the two operation rotating shafts correspond to each other, and the outer sides of the two positioning arms are respectively provided with an arc-shaped convex surface and an arc-shaped concave surface; when one operating rotating shaft drives one set of contact mechanism to break and keep still after breaking, the other operating rotating shaft can drive the upper positioning arm to rotate and drive the other set of contact mechanism to close, and the arc concave surface on the stationary positioning arm provides a space for letting down for the arc convex surface on the rotating positioning arm; when one operating rotating shaft drives one set of contact mechanism to be switched on and keeps still, the arc convex surface of the upper positioning arm of the other operating rotating shaft can interfere with the arc convex surface of the fixed positioning arm to be limited in rotating angle and can not drive the other set of contact mechanism to be switched on. The structure can effectively prevent two sets of contact mechanisms from being closed simultaneously through the mutual abdication and mutual interference of the two positioning arms, so that safety accidents are avoided, and the structure is simple in whole and good in interlocking performance.
Further, the sections are made along the radial direction of the two operation rotating shafts and the two positioning arms, a first arc formed by the arc convex surface on each positioning arm takes the rotation center point of the operation rotating shaft which is fixedly connected with the positioning arm as a circle center, the radius between the first arc and the circle center is R1, a second arc formed by the arc concave surface on each positioning arm takes the rotation center point of the other operation rotating shaft which is not connected with the positioning arm as a circle center, and the radius between the second arc and the circle center is R2; r2> R1.
Preferably R2 is 1mm to 2mm greater than R1.
Still further improved, the shell beside each positioning arm is provided with a micro switch, one side of the positioning arm touches the micro switch when the operation rotating shaft fixedly connected with the positioning arm drives the contact mechanism to be switched on, or one side of the positioning arm touches the micro switch when the operation rotating shaft fixedly connected with the positioning arm drives the change-over switch contact mechanism to be switched off, and the micro switch indicates the working state of the contact mechanism through a controller or an indicator lamp. The working state of the change-over switch is convenient to be intuitively judged.
On one hand, the two sets of reversing mechanisms can be arranged on the same side, so that the whole structure is compact, and the size is smaller; on the other hand, as the reversing mechanism is additionally provided with the resetting piece which is rotatably sleeved on the operation rotating shaft, the resetting piece is provided with the strip-shaped driving through hole or the U-shaped driving groove, and one end of the driving pin is matched with the strip-shaped driving through hole or the U-shaped driving groove; one end of a tension spring is connected with one side of the reset piece far away from the driving pin, and the other end of the tension spring is connected to the shell. When the electromagnetic coil is powered on to switch on and off the contact mechanism, the tension spring can be stretched to store energy, when the switching action is completed, the reset compression spring drives the movable iron core to reset when the electromagnetic coil is powered off, and the tension spring drives the driving pin to reset through the reset piece. The driving pin is accurately reset, so that the completion of the next switching action is facilitated. Therefore, the driving part of the invention has better resetting property and can effectively improve the reliability of switching action.
Drawings
FIG. 1 is a front perspective view of the present invention;
FIG. 2 is a rear perspective view of a hidden portion of the housing of the present invention;
FIG. 3 is a front perspective view of a hidden portion of the housing of the present invention;
FIG. 4 is an enlarged view at A of FIG. 3;
FIG. 5 is a top view of the present invention;
FIG. 6 is a B-B cross-sectional view of FIG. 5;
FIG. 7 is an enlarged cross-sectional view of C-C of FIG. 5;
fig. 8 is a perspective view of the reversing element;
FIG. 9 is a perspective view of the linkage;
FIG. 10 is a perspective view of the reset element;
FIG. 11 is a perspective view of the positioning arm;
fig. 12 is a front view of the housing of the present invention with both sets of contact mechanisms in the open state and with portions hidden.
Fig. 13 is a front view of a right side contact mechanism of the present invention in a closed state with a portion of the housing hidden.
FIG. 14 is an enlarged view of the right side of the present invention with a set of contact mechanisms in the closed position and taken along section C-C of FIG. 5;
fig. 15 is a front view of a left side set of contact mechanisms of the present invention in a closed state with a portion of the housing hidden.
Fig. 16 is an enlarged view of the left side of the present invention with a set of contact mechanisms in the closed position and taken along section C-C of fig. 5.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 to 11 show a power transfer switch, which comprises a shell 1, wherein two groups of contact mechanisms 2 and two groups of reversing mechanisms 3 are arranged on the shell 1, one group of contact mechanisms 2 enables a load end 4 to be switched on/off with a common power end 5, and the other group of contact mechanisms 2 enables the load end 4 to be switched on/off with a standby power end 6.
Each reversing mechanism 3 comprises an operation rotating shaft 31 pivoted on the shell 1, each operation rotating shaft 31 is fixedly connected with a reversing piece 32, two limiting protrusions 321 are arranged on the reversing piece 32, and as further shown in fig. 8, one limiting protrusion 321 is positioned in the middle of the upper end of the reversing piece 32, and the other limiting protrusion 321 is positioned at one side of the upper end of the reversing piece 32; the shell 1 is fixedly provided with a limit rod 33, the shell 1 is fixedly provided with an electromagnetic coil 34, a center hole of the electromagnetic coil 34 is provided with a reset pressure spring 341 and a movable iron core 342, one end of the movable iron core 342 is connected with the reset pressure spring 341, the other end of the movable iron core 342 is hinged with one end of a linkage piece 36 through a connecting pin 35, the other end of the linkage piece 36 is connected with a driving pin 37, the middle of the reversing piece 32 is provided with a guide through hole 322, the inner side surface of the guide through hole 322 is provided with two splayed guide surfaces 3221, the two splayed guide surfaces 3221 are connected through a section of transition surface 3222, and the two guide surfaces 3221 are symmetrically arranged relative to the transition surface 3222; the other sides of the guide through holes 322 corresponding to the two guide surfaces 3221 are respectively provided with a positioning groove 3223 matched with the driving pin 37 when the driving pin 37 resets; the driving pin 37 passes through the guide through hole 322, and the driving pin 37 may be inserted only into the guide through hole 322.
A relief through hole 361 is formed in the middle of the linkage member 36, and the operation rotating shaft 31 passes through the relief through hole 361; the two linkage members 36 are arranged on two sides of the reversing member 32, one ends of the two linkage members 36 are simultaneously hinged with the other end of the movable iron core 342 through the connecting pin 35, and the driving pin 37 passes through the other ends of the two linkage members 36 and passes through the guiding through hole 322. The lower side of each link 36 is provided with a lower through hole 362 to be matched with the connecting pin 35, and the upper side of each link 36 is provided with an upper through hole 363 to be matched with the driving pin 37.
A reset piece 38 is rotatably sleeved on the operation rotating shaft 31, a U-shaped driving groove 381 is arranged on the reset piece 38, the U-shaped driving groove 381 can be replaced by a strip-shaped driving through hole, and one end of a driving pin 37 is matched with the U-shaped driving groove 381; one end of a tension spring 39 is connected to the side of the reset element 38 remote from the drive pin 37, and the other end is connected to the housing 1. The restoring member 38 includes a section of column 38a, a through hole 382 is formed in the middle of the column 38a, a section of cantilever 38b perpendicular to the column 38a extends from the outer side surface of the column 38a, the U-shaped driving slot 381 is disposed on the cantilever 38b, the restoring member 38 is rotatably sleeved on the operating shaft 31 through the through hole 382 in the middle of the column 38a, and a protrusion 383 is disposed on a side of the column 38a away from the U-shaped driving slot 381 and connected to one end of the tension spring 39.
When the electromagnetic coil 34 is powered on and the movable iron core 342 is sucked, the movable iron core 342 drives the driving pin 37 to move along one guide surface 3221 through the linkage piece 36 and then drives the reversing piece 32 and the operation rotating shaft 31 to rotate clockwise or anticlockwise, so that when the contact mechanism 2 is switched on and off, one limiting protrusion 321 on the reversing piece 32 contacts the limiting rod 33 to limit the reversing piece 32 and the operation rotating shaft 31 to rotate continuously, and when the contact mechanism 2 is switched off, the other limiting protrusion 321 on the reversing piece 32 contacts the limiting rod 33 to limit the reversing piece 32 and the operation rotating shaft 31 to rotate continuously; when the electromagnetic coil 34 is powered off, the reset pressure spring 341 drives the movable iron core 342 to reset, and the tension spring 39 drives the driving pin 37 to reset through the reset piece 38.
The two operation rotating shafts 31 on the two sets of reversing mechanisms 3 are parallel to each other, the reversing piece 32 is perpendicular to the operation rotating shafts 31, and the limiting rod 33 and the driving pin 37 are parallel to the operation rotating shafts 31; when the bottom surface of the housing 1 is in the horizontal position and the driving pin 37 is in the reset state, the tension spring 39 is in the vertical state; each operation rotating shaft 31 drives a group of contact mechanisms 2 to switch on and off.
Each operating shaft 31 is also connected with a positioning mechanism 7 which drives a limiting projection 321 on the reversing element 32 to lean against the limiting rod 33.
The positioning mechanism 7 comprises positioning arms 71 fixedly connected with the operation rotating shaft 31 and perpendicular to the operation rotating shaft 31, one end of each positioning arm 71 is hinged with one end of a pressing rod 72, the other end of the pressing rod 72 is connected with a pressure spring 73, the pressure spring 73 is sleeved on a sleeve 74, and one end of the sleeve 74 is hinged on the shell 1; when the operating shaft 31 drives the contact mechanism 2 to be switched on or off, the cross section is made along the radial direction of the operating shaft 31, the positioning arm 71 rotates to pass through a dead point formed by connecting the center point of the operating shaft 31, the hinge point of the positioning arm 71 and the pressing rod 72 and the hinge point of the sleeve 74 and the shell 1, and the pressure spring 73 provides a driving force to enable a limiting protrusion 321 on the reversing piece 32 to lean against the limiting rod 33. The compression spring 73 is integrally disposed in the sleeve 74, and the other end of the compression rod 72 is inserted into the sleeve 74.
The positioning arms 71 are cam-shaped, the positions of the two positioning arms 71 respectively fixedly connected to the two operation rotating shafts 31 correspond to each other, and an arc-shaped convex surface 711 and an arc-shaped concave surface 712 are respectively arranged on the outer sides of the two positioning arms 71; when one operation rotating shaft 31 drives one set of contact mechanism 2 to break the brake and keep the brake still, the other operation rotating shaft 31 can drive the upper positioning arm 71 to rotate and drive the other set of contact mechanism 2 to close the brake, and the arc concave surface 712 on the fixed positioning arm 71 provides a yielding space for the arc convex surface 711 on the rotating positioning arm 71; when one operating shaft 31 drives one set of contact mechanism 2 to be switched on and keeps still, the arc-shaped convex surface 711 of the upper positioning arm 71 of the other operating shaft 31 can interfere with the arc-shaped convex surface 711 of the fixed positioning arm 71 to be limited in rotation angle and cannot drive the other set of contact mechanism 2 to be switched on. Thus, the two groups of contact mechanisms 2 can be interlocked, and safety accidents caused by simultaneous closing of the two groups of contact mechanisms can be prevented.
As further shown in fig. 5 and 7, a section is formed along the radial direction of the two operation shafts 31 and the two positioning arms 71, the first arc 7111 formed by the arc convex surfaces 711 on each positioning arm 71 takes the rotation center point of the operation shaft 31 which is fixedly connected with the positioning arm 71 as the center of a circle, the radius between the first arc 7111 and the center of the circle is R1, the second arc 7121 formed by the arc concave surfaces 712 on each positioning arm 71 takes the rotation center point of the other operation shaft 31 which is not connected with the positioning arm 71 as the center of a circle, and the radius between the second arc 7121 and the center of the circle is R2; r2> R1. Preferably R2 is 1mm to 2mm greater than R1.
The shell 1 beside each positioning arm 71 is provided with a micro switch 8, one side of the positioning arm 71 touches the micro switch 8 when the operation rotating shaft 31 fixedly connected with the positioning arm 71 drives the contact mechanism 2 to switch on, or one side of the positioning arm 71 touches the micro switch 8 when the operation rotating shaft 31 fixedly connected with the positioning arm 71 drives the change-over switch contact mechanism 2 to switch off, and the micro switch 8 indicates the working state of the contact mechanism 2 through a controller or an indicator lamp.
Each positioning arm 71 is provided with a fitting through hole 713 which is matched with the operation rotating shaft 31, the cross section of the fitting through hole 713 is square, and the cross section of the fitting part of the operation rotating shaft 31 and the fitting through hole 713 is square. Each reversing piece 32 is provided with a square through hole 323 which is matched with the operation rotating shaft 31 to form a fixed connection, and the cross section of the matched part of the operation rotating shaft 31 and the square through hole 323 is square.
The operating shaft 31 is also fixedly connected with a manual operating arm 9. The manual operation arm 9 can manually drive the operation rotating shaft 31 to rotate so as to realize the switching on/off of the contact mechanism 2.
The operation process of the invention is as follows: as shown in fig. 2, 7 and 12, the two groups of contact mechanisms 2 of the transfer switch are in a separated state, and the load end 4 is not electrified. At this time, the limiting protrusions 321 in the middle of the upper ends of the two reversing pieces 32 respectively lean against the two limiting rods 33; the two positioning arms 71 are separated from the contacts of the two micro-switches 8 respectively, and the micro-switches 8 can indicate that the two groups of contact mechanisms 2 are in a switching-off state through a controller or an indicator lamp.
Then, if the load end 4 is required to be closed with the common power end 5, the electromagnetic coil 34 on the right side is electrified to suck the movable iron core 342, the movable iron core 342 drives the driving pin 37 to move along one guiding surface 3221 through the linkage piece 36 and then drives the reversing piece 32 and the operation rotating shaft 31 to rotate anticlockwise, so that the right contact mechanism 2 is closed, when the right contact mechanism 2 is closed, one limiting protrusion 321 on the upper end side of the right reversing piece 32 contacts the limiting rod 33 to limit the reversing piece 32 and the operation rotating shaft 31 to rotate continuously, meanwhile, the right positioning arm 71 rotates along with the operation rotating shaft 31 to pass through a dead point formed by connecting the center point of the operation rotating shaft 31, the hinge point of the positioning arm 71 and the pressing rod 72 and the hinge point of the sleeve 74 and the shell 1, and the right side pressing spring 73 provides a driving force to enable the limiting protrusion 321 on the upper end side of the right reversing piece 32 to lean against the limiting rod 33, so as to keep the closing stability of the contact mechanism 2. Then, the right electromagnetic coil 34 is powered off, the reset compression spring 341 drives the movable iron core 342 to reset, the right tension spring 39 drives the driving pin 37 to reset through the reset piece 38, and the driving pin 37 is matched with one positioning groove 3223. As shown in fig. 13. In this state, as shown in fig. 14, the arc concave surface 712 on the stationary positioning arm 71 provides a space for letting off the arc convex surface 711 on the rotating positioning arm 71, i.e., the arc concave surface 712 on the left positioning arm 71 provides a space for letting off the arc convex surface 711 on the right positioning arm 71, and the arc convex surface 711 on the right positioning arm 71 rotates to the arc concave surface 712 on the left positioning arm 71; at this time, the left positioning arm 71 interferes with the right positioning arm 71 to prevent the rotation, so that the contact mechanism 2 on the left cannot be closed again, thereby preventing the occurrence of a safety accident. Meanwhile, the right positioning arm 71 touches the contact of the right micro switch 8, and the right micro switch 8 can indicate that the right contact mechanism 2 is in a closing state through a controller or an indicator lamp, namely, the load end 4 and the common power end 5 are closed.
Then, if the load terminal 4 is to be switched on with the standby power terminal 6, the contact mechanism 2 on the right side is first switched off, i.e. the load terminal 4 is separated from the normal power terminal 5. Then, the left electromagnetic coil 34 is electrified to suck the movable iron core 342, the movable iron core 342 drives the driving pin 37 to move along one guide surface 3221 through the linkage piece 36 and then drives the reversing piece 32 and the operation rotating shaft 31 to rotate clockwise, so that when the left contact mechanism 2 is switched on, one limiting protrusion 321 on the upper end side of the left reversing piece 32 contacts the limiting rod 33 to limit the reversing piece 32 and the operation rotating shaft 31 to rotate continuously, meanwhile, the left positioning arm 71 rotates along with the operation rotating shaft 31 to pass through a dead point formed by connecting the center point of the operation rotating shaft 31, the hinge point of the positioning arm 71 and the pressing rod 72 and the hinge point of the sleeve 74 and the shell 1, and the pressure spring 73 provides a driving force to enable the limiting protrusion 321 on the upper end side of the left reversing piece 32 to lean against the limiting rod 33, so that the switching-on stability of the left contact mechanism 2 is maintained. Then, the left electromagnetic coil 34 is powered off, the reset compression spring 341 drives the movable iron core 342 to reset, the left tension spring 39 drives the driving pin 37 to reset through the reset piece 38, and the driving pin 37 is matched with one positioning groove 3223. As shown in fig. 15. In this state, as shown in fig. 16, the arc concave surface 712 on the right positioning arm 71 provides a space for letting off the arc convex surface 711 on the left positioning arm 71, and the arc convex surface 711 on the left positioning arm 71 rotates to the arc concave surface 712 on the right positioning arm 71; at this time, when the right positioning arm 71 is to be rotated counterclockwise, interference with the left positioning arm 71 is formed, so that the right contact mechanism 2 cannot be reclosed, and the occurrence of a safety accident can be prevented. Meanwhile, the left positioning arm 71 touches the contact of the left micro switch 8, and the left micro switch 8 can indicate that the left contact mechanism 2 is in a closing state through a controller or an indicator lamp, namely, the load end 4 and the standby power end 6 are closed.
The above is only one preferred embodiment of the present invention and all equivalent changes to those skilled in the art according to the claims fall within the scope of the present invention.
Claims (9)
1. The utility model provides a power change-over switch, includes the casing, is equipped with two sets of contact mechanism and two sets of reversing mechanism on the casing, and a set of contact mechanism makes load end and the switching-on of power end commonly used, and another set of contact mechanism makes load end and stand-by power end switching-on, its characterized in that: each reversing mechanism comprises an operation rotating shaft pivoted on a shell, each operation rotating shaft is fixedly connected with a reversing piece, two limiting protrusions are arranged on the reversing pieces, a limiting rod is fixedly arranged on the shell, an electromagnetic coil is fixed on the shell, a reset pressure spring and a movable iron core are arranged in a central hole of the electromagnetic coil, one end of the movable iron core is connected with the reset pressure spring, the other end of the movable iron core is hinged with one end of a linkage piece through a connecting pin, the other end of the linkage piece is connected with a driving pin, a guide through hole is formed in the middle of the reversing pieces, two splayed guide surfaces are arranged on the inner side surface of the guide through hole, and the driving pin penetrates through or is inserted into the guide through hole;
the reset piece is rotatably sleeved on the operation rotating shaft, a U-shaped driving groove or a strip-shaped driving through hole is formed in the reset piece, and one end of the driving pin is matched with the U-shaped driving groove or the strip-shaped driving through hole; one end of a tension spring is connected with one side of the reset piece far away from the driving pin, and the other end of the tension spring is connected with the shell;
when the electromagnetic coil is electrified and the movable iron core is sucked, the movable iron core drives the driving pin to move along one guide surface through the linkage piece and then drives the reversing piece and the operation rotating shaft to rotate clockwise or anticlockwise, so that the contact mechanism is switched on and off, one limiting protrusion on the reversing piece touches the limiting rod to limit the reversing piece and the operation rotating shaft to rotate continuously when the contact mechanism is switched on, and the other limiting protrusion on the reversing piece touches the limiting rod to limit the reversing piece and the operation rotating shaft to rotate continuously when the contact mechanism is switched off; when the electromagnetic coil is powered off, the reset pressure spring drives the movable iron core to reset, and the tension spring drives the driving pin to reset through the reset piece;
two operation rotating shafts on the two sets of reversing mechanisms are parallel to each other, and each operation rotating shaft drives a group of contact mechanisms to switch on and off; each operation rotating shaft is also connected with a positioning mechanism for driving a limiting protrusion on the reversing piece to lean against the limiting rod;
the limiting rod and the driving pin are parallel to the operation rotating shaft; the reset piece comprises a section of column body, a through hole is formed in the middle of the column body, a section of cantilever which is perpendicular to the column body is extended from the outer side face of the column body, the cantilever is provided with the strip-shaped driving through hole or the U-shaped driving groove, the reset piece is rotatably sleeved on the operation rotating shaft through the through hole in the middle of the column body, and one side of the column body is connected with one end of the tension spring.
2. A power transfer switch as claimed in claim 1, wherein: a yielding through hole is formed in the middle of the linkage piece, and the operation rotating shaft penetrates through the yielding through hole; the reversing piece is perpendicular to the operation rotating shaft, and when the bottom surface of the shell is in a horizontal position and the driving pin is in a reset state, the tension spring is in a vertical state.
3. A power transfer switch as claimed in claim 1, wherein: the two splayed guide surfaces are connected through a section of transition surface, and the two guide surfaces are symmetrically arranged relative to the transition surface; the other sides of the guide through holes, which correspond to the two guide surfaces, are respectively provided with a positioning groove matched with the driving pin when the driving pin resets.
4. A power transfer switch as claimed in claim 1, wherein: the two linkage pieces are arranged on two sides of the reversing piece, one ends of the two linkage pieces are simultaneously hinged with the other end of the movable iron core through connecting pins, and the driving pins penetrate through the other ends of the two linkage pieces and penetrate through the guide through holes.
5. A power transfer switch as claimed in any one of claims 1 to 4, wherein: the positioning mechanism comprises positioning arms fixedly connected with the operation rotating shaft and perpendicular to the operation rotating shaft, one end of each positioning arm is hinged with one end of a pressing rod, the other end of the pressing rod is connected with a pressure spring, the pressure spring is sleeved on a sleeve, and one end of the sleeve is hinged on the shell; when the operation rotating shaft drives the contact mechanism to be in opening or closing, a section is made along the radial direction of the operation rotating shaft, the positioning arm rotates to pass through a dead point formed by connecting the center point of the operation rotating shaft, the hinging point of the positioning arm and the compression rod and the hinging point of the sleeve and the shell, and the pressure spring provides a driving force to enable a limiting bulge on the reversing piece to lean against the limiting rod.
6. A power transfer switch as claimed in claim 5, wherein: the positioning arms are cam-shaped, the positions of the two positioning arms which are respectively and fixedly connected to the two operation rotating shafts correspond to each other, and the outer sides of the two positioning arms are respectively provided with an arc-shaped convex surface and an arc-shaped concave surface; when one operating rotating shaft drives one set of contact mechanism to break and keep still after breaking, the other operating rotating shaft can drive the upper positioning arm to rotate and drive the other set of contact mechanism to close, and the arc concave surface on the stationary positioning arm provides a space for letting down for the arc convex surface on the rotating positioning arm; when one operating rotating shaft drives one set of contact mechanism to be switched on and keeps still, the arc convex surface of the upper positioning arm of the other operating rotating shaft can interfere with the arc convex surface of the fixed positioning arm to be limited in rotating angle and can not drive the other set of contact mechanism to be switched on.
7. A power transfer switch as claimed in claim 6, wherein: the method comprises the steps of making sections along the radial directions of two operation rotating shafts and two positioning arms, wherein a first arc formed by the arc convex surface on each positioning arm takes a rotation center point of the operation rotating shaft which is fixedly connected with the positioning arm as a circle center, the radius between the first arc and the circle center is R1, and a second arc formed by the arc concave surface on each positioning arm takes a rotation center point of the other operation rotating shaft which is not connected with the positioning arm as a circle center, and the radius between the second arc and the circle center is R2; r2> R1.
8. A power transfer switch as claimed in claim 7, wherein: r2 is 1mm to 2mm greater than R1.
9. A power transfer switch as claimed in claim 5, wherein: a micro switch is arranged on a shell beside each positioning arm, one side of the positioning arm touches the micro switch when the operation rotating shaft fixedly connected with the positioning arm drives the contact mechanism to be switched on, or one side of the positioning arm touches the micro switch when the operation rotating shaft fixedly connected with the positioning arm drives the change-over switch contact mechanism to be switched off, and the micro switch indicates the working state of the contact mechanism through a controller or an indicator lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810642089.XA CN108538671B (en) | 2018-06-21 | 2018-06-21 | Power supply change-over switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810642089.XA CN108538671B (en) | 2018-06-21 | 2018-06-21 | Power supply change-over switch |
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| CN108538671A CN108538671A (en) | 2018-09-14 |
| CN108538671B true CN108538671B (en) | 2024-02-23 |
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| CN201810642089.XA Active CN108538671B (en) | 2018-06-21 | 2018-06-21 | Power supply change-over switch |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109545590B (en) * | 2019-01-10 | 2024-02-02 | 常熟开关制造有限公司(原常熟开关厂） | Operating mechanism of dual-power change-over switch |
| CN110310849B (en) * | 2019-07-31 | 2024-07-19 | 柏法瑞电气（厦门）有限公司 | Double-power change-over switch capable of being padlock |
| CN113838694B (en) * | 2020-06-24 | 2024-11-26 | 施耐德电器工业公司 | Operating mechanism for dual power transfer switch and dual power transfer switch |
| CN115240999A (en) * | 2022-07-20 | 2022-10-25 | 浙江现代电气有限公司 | A dual power transfer switch |
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| US4808775A (en) * | 1987-08-03 | 1989-02-28 | Toyo Denso Kabushiki Kaisha | Reversing switch |
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| CN108538671A (en) | 2018-09-14 |
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