CN112242267A - Intermediate position limiting device of three-station operating mechanism - Google Patents
Intermediate position limiting device of three-station operating mechanism Download PDFInfo
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- CN112242267A CN112242267A CN201910653035.8A CN201910653035A CN112242267A CN 112242267 A CN112242267 A CN 112242267A CN 201910653035 A CN201910653035 A CN 201910653035A CN 112242267 A CN112242267 A CN 112242267A
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- limiting device
- limiting
- shaft
- half shaft
- pin
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/04—Interlocking mechanisms
- H01H31/08—Interlocking mechanisms for interlocking two or more parts of the mechanism for operating contacts
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a middle position limiting device of a three-station operating mechanism, which comprises a main shaft, a cam, a left limiting device, a right limiting device and a left half shaft, the cam sleeve is arranged on the main shaft, the left limiting device and the right limiting device are symmetrically arranged on the left side and the right side above the cam, the protruding part of the cam is limited in a gap between the left limiting device and the right limiting device, the left limiting device and the right limiting device are respectively rotatably sleeved on the shaft B and the shaft A, the left limiting pin and the right limiting pin are respectively positioned below the left limiting device and the right limiting device and serve as lower limit positions of the left limiting device and the right limiting device for downward rotation of the left limiting device and the right limiting device, the left limiting device and the right limiting device are respectively kept at the lower limit positions through torsion spring structures under the action of no external force, and the left half shaft and the right half shaft are respectively positioned above the left limiting device and the right limiting device and are used for limiting the upward rotation of the left limiting device and the right limiting device. The device can accurately position the moving contact at an isolation position.
Description
Technical Field
The invention relates to the field of isolating switch equipment, in particular to a middle position limiting device of a three-station operating mechanism.
Background
The contact system of the three-position isolating switch is shown in fig. 1, a movable contact 21 is hinged on a contact head component 22 and rotates around a hinge point, in the rotating process, when the movable contact 21 is lapped on a fixed contact component 23, the isolating switch is in a working position, when the movable contact 21 is lapped on a grounding contact component 24, the isolating switch is in a grounding position, when the movable contact 21 is located at a middle position between the fixed contact component 23 and the grounding contact component 24, the isolating switch is in an isolating position, wherein the movable contact 21 is in a free state at the middle position, therefore, in order to enable the movable contact to accurately stop at the middle position to ensure complete isolation, a limiting device is required to be designed to position the movable contact at the middle position.
Disclosure of Invention
The invention aims to provide a middle position limiting device of a three-station operating mechanism, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a middle position limiting device of a three-station operating mechanism is arranged on a base plate of an isolating switch and comprises a main shaft, a cam, a left limiting device, a right limiting device, a left half shaft, a right half shaft, a left limiting pin, a right limiting pin, a shaft A and a shaft B, wherein the main shaft vertically penetrates through the base plate, the cam is sleeved and fixed on the main shaft, the left limiting device and the right limiting device are symmetrically arranged on the left side and the right side above the cam, the convex part of the cam is limited in a gap between the left limiting device and the right limiting device, the shaft A, the shaft B, the left limiting pin and the right limiting pin are vertically fixed on the base plate, the left limiting device and the right limiting device are respectively rotatably sleeved on the shaft B and the shaft A, the left limiting pin and the right limiting pin are respectively positioned below the left limiting device and the right limiting device to serve as lower limit positions for downward rotation of the left limiting device and the right limiting device, the left limiting device and the right limiting device are respectively kept at the lower limit, the left half shaft and the right half shaft are respectively vertically and rotatably fixed on the base plate and are respectively positioned above the left limiting device and the right limiting device to limit the upward rotation of the left half shaft and the right half shaft.
Preferably, the middle position limiting device, the left limiting device and the right limiting device of the three-station operating mechanism have the same structure and are symmetrically arranged, wherein the right limit position comprises a limit block, a torsion spring A, a flat washer, a cotter pin, a pawl, a pin, a torsion spring B and a limit screw, the limit block is sleeved on the shaft A, the device is fixed by a flat washer and a cotter pin, the pawl is hinged on a limiting block by a pin and can rotate around the hinged point, the limiting block is provided with a step for limiting the lower limit position of the pawl to rotate along the anticlockwise direction, a torsion spring B is sleeved on the pin, a limiting screw is fixed on the side surface of the limiting block for limiting one side of the torsion spring B, the other side of the torsion spring B props against the pawl for keeping the pawl at the lower limit position under the action of other external force, a torsion spring A is sleeved on a shaft A, the limiting block is buckled to enable the limiting block to be always attached to the right limiting pin and kept at the lower limit position of the right limiting pin under the action of no other external force.
Preferably, in the middle position limiting device of the three-position operating mechanism, the left half shaft and the right half shaft respectively keep the limiting state on the left limiting device and the right limiting device under the action of no other external force, wherein the left half shaft can only rotate anticlockwise, the right half shaft can only rotate clockwise, and the limitation on the left limiting device and the right limiting device can be respectively released after the left half shaft and the right half shaft rotate.
Preferably, in the middle position limiting device of the three-station operating mechanism, a shaft C is vertically arranged on a convex part of the cam, and a sleeve capable of rotating around the shaft C is sleeved on the shaft C.
Preferably, the limiting block and the pawl form a transverse V-shaped structure together, wherein the limiting block is arranged at the upper part, the pawl is arranged at the lower part, and the bottom surface of the pawl is an upwards-concave cambered surface.
Compared with the prior art, the invention has the beneficial effects that:
in the invention, the main shaft is linked with the moving contact of the isolating switch through a linkage mechanism, the moving contact is driven to rotate around a hinge joint of the moving contact through the rotation of the main shaft, the protruding part of the cam fixed on the main shaft is limited in a gap between the left limiting device and the right limiting device to achieve the effect of limiting the main shaft, when the limitation of the cam by the left limiting device or the right limiting device is removed, the main shaft can rotate leftwards to drive the moving contact to reach a grounding position or rotate rightwards to drive the moving contact to reach a working position, and when the main shaft rotates reversely, the protruding part of the cam can be automatically clamped between the left limiting device and the right limiting device again, correspondingly, the moving contact also moves to the isolating position between the grounding position and the working position.
Drawings
FIG. 1 is a schematic diagram of a contact system of a disconnecting switch;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic structural view of a right stop device according to the present invention;
FIG. 4 is a schematic view of the cam rotating when the right stop device is not released in the present invention;
FIG. 5 is a schematic view of the cam rotating after the right stop device is released in the present invention;
FIG. 6 is a schematic view of the cam of the present invention shown disengaged from the neutral position;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2-6, the present invention provides a technical solution: a middle position limiting device of a three-station operating mechanism is arranged on a base plate of an isolating switch and comprises a main shaft 10, a cam 9, a left limiting device 2, a right limiting device 1, a left half shaft 6, a right half shaft 5, a left limiting pin 8, a right limiting pin 7, a shaft A3 and a shaft B4, wherein the main shaft 10 vertically penetrates through the base plate, the cam 9 is sleeved and fixed on the main shaft 10, the left limiting device 2 and the right limiting device 1 are symmetrically arranged on the left side and the right side above the cam 9, the convex part of the cam 9 is limited in a gap between the left limiting device 2 and the right limiting device 1, the shaft A3, the shaft B4, the left limiting pin 8 and the right limiting pin 7 are vertically fixed on the base plate, the left limiting device 2 and the right limiting device 1 are respectively rotatably sleeved on the shaft B4 and the shaft A3, the left limiting pin 8 and the right limiting pin 7 are respectively positioned below the left limiting device 2 and the right limiting device 1 as lower limiting positions of the left limiting device 2 and the right, the left limiting device 2 and the right limiting device 1 are respectively kept at the lower limit positions under the action of no external force through torsion spring structures, the left half shaft 6 and the right half shaft 5 are respectively vertically and rotatably fixed on the base plate and are respectively positioned above the left limiting device 2 and the right limiting device 1 and used for limiting the upward rotation of the left limiting device and the right limiting device.
Fig. 1 shows the above-mentioned structure, in this structure, main shaft 10 passes through the moving contact linkage of link gear and isolator, when main shaft 10 rotates, it is rotatory around its pin joint to drive the moving contact, cam 9 is fixed on main shaft 10, so when the protruding position restriction of cam 9 is between left stop device 2 and right stop device 1, cam 9 and main shaft all can not rotate by the owner of card, it is corresponding, the moving contact also can not rotate, the position that the moving contact was locked at this moment is just in the isolated position between ground connection position and the operating position, can guarantee complete isolation.
In another embodiment, the left and right position-limiting devices 2 and 1 have the same structure and are symmetrically arranged, wherein the right limit position 1 has a structure as shown in fig. 3, and includes a limit block 1.1, a torsion spring a1.2, a flat washer 1.3, a split pin 1.4, a latch 1.5, a pin 1.6, a torsion spring B1.7 and a limit screw 1.8, the limit block 1.1 is sleeved on a shaft a3 and fixed with the split pin 1.4 through the flat washer 1.3, the latch 1.5 is hinged on the limit block 1.1 through the pin 1.6 and can rotate around a hinge point, the limit block 1.1 is provided with a step for limiting the lower limit position of the latch 1.5 rotating counterclockwise, the torsion spring B1.7 is sleeved on the pin 1.6, the limit screw 1.8 is fixed on the side of the limit block 1.1 for limiting one side of the torsion spring B1.7, the latch 1.5 of the torsion spring B1.7 is used for making the latch 1.5 abut against the other side of the limit block 1.1 to keep the other side of the open pin at the lower limit position, and the open pin is fixed on the limit block 1., the torsion spring A1.2 is sleeved on the shaft A3 and buckles the limiting block 1.1 to enable the limiting block 1.1 to be always attached to the right limiting pin 7 and kept at the lower limit position thereof without the action of other external force.
In another embodiment, the left half shaft 6 and the right half shaft 5 respectively keep the limiting state of the left limiting device 2 and the right limiting device 1 under the action of no other external force, wherein the left half shaft 6 can only rotate anticlockwise, the right half shaft 5 can only rotate clockwise, and the limitation of the left limiting device 2 and the right limiting device 1 can be respectively released after the rotation of the left half shaft and the right half shaft.
In another embodiment, the cam 9 has a shaft C11 vertically disposed at the convex portion, and a sleeve 12 is sleeved on the shaft C11 for rotating around the shaft.
In another embodiment, the limiting block 1.1 and the detent 1.5 together form a transverse V-shaped structure, wherein the limiting block 1.1 is arranged at the upper part, the detent 1.5 is arranged at the lower part, and the bottom surface of the detent 1.5 is an upward concave cambered surface.
Figures 4-6 show the position of the cam 9 when the right stop device is in different states.
In figure 4, the cam 9 is constrained in the intermediate position, in which the movable contact is in the isolated position, and when the main shaft 10 and the cam 9 continue to rotate to the position shown, the detent 1.5 is in the lower limit position, blocking the cam 9 from continuing to rotate, and the movable contact will therefore remain in the isolated position.
In fig. 5, when a small pushing force F is applied to the lower end of the right half shaft 5, the right half shaft 5 can rotate clockwise, and the right limiting device 1 is unlocked, so that the right limiting device 1 performs clockwise rotation motion under the pushing force of the shaft sleeve 12 (the pushing force is generated by the rotation of the cam 9), the shaft sleeve 12 rolls along the surface of the pawl 1.5, finally, the protruding part of the cam 9 is disengaged from the middle position, the main shaft 10 can drive the cam 9 to perform rotation motion, thereby driving the movable contact to be changed from the isolation position to the working position, after the protruding part of the cam 9 is completely disengaged from the middle position, the right limiting device 1 is reset to the lower limit position under the action of the torsion spring a1.2, and the right half shaft 5 is also reset to re-lock the right limiting device 1; the left limiting device 2 is operated similarly, a thrust is given to the left half shaft 6, the left limiting device can be tripped, the cam can rotate anticlockwise to be separated from the middle position, and finally the moving contact is driven to reach the grounding position.
In fig. 6, when the movable contact is turned from the working position to the isolating position, the raised part of the cam 9 pushes the latch 1.5, and the latch 1.5 moves upwards until the raised part of the cam 9 is clamped in the middle position, and the latch 1.5 is reset to lock the cam again.
The device can accurately lock the position of the moving contact, the accuracy of the moving contact at an isolation position is guaranteed, and when the device is unlocked, the thrust of the cam received by the right limiting device 1 is very large, but the force transmitted to the right half shaft 5 is very small, so that the device can be unlocked only by applying very small force to the right half shaft, and the device has a good force unloading effect.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The middle position limiting device of the three-station operating mechanism is installed on a base plate of an isolating switch and comprises a main shaft, a cam, a left limiting device, a right limiting device, a left half shaft, a right half shaft, a left limiting pin, a right limiting pin, a shaft A and a shaft B And the left half shaft and the right half shaft are respectively vertically and rotatably fixed on the base plate and are respectively positioned above the left limiting device and the right limiting device to limit the upward rotation of the left half shaft and the right half shaft.
2. The middle position limiting device of a three-station operating mechanism according to claim 1, wherein the left limiting device and the right limiting device have the same structure and are symmetrically arranged, wherein the right limiting position comprises a limiting block, a torsion spring A, a flat washer, a split pin, a pawl, a pin, a torsion spring B and a limiting screw, the limiting block is sleeved on the shaft A and is fixed by the flat washer and the split pin, the pawl is hinged on the limiting block by the pin and can rotate around the hinged point, the limiting block is provided with a step for limiting the lower limiting position of the pawl which rotates anticlockwise, the torsion spring B is sleeved on the pin, the limiting screw is fixed on the side surface of the limiting block and is used for limiting one side of the torsion spring B, the other side of the torsion spring B supports against the pawl and is used for keeping the pawl at the lower limiting position under the action of other external force, the torsion spring A is sleeved on the shaft A, and buckles the limiting block and is used for keeping the limiting block under the action of other external force and an extreme position.
3. The intermediate position limiter of a three-position operating mechanism as claimed in claim 2, wherein the left half shaft and the right half shaft are kept in the limiting state of the left limiter and the right limiter respectively without any external force, wherein the left half shaft can only rotate counterclockwise, the right half shaft can only rotate clockwise, and the limitation of the left limiter and the right limiter can be released respectively after the left half shaft and the right half shaft rotate.
4. The intermediate position limiter for three-position operating mechanism as claimed in claim 2, wherein the cam has a shaft C vertically set on its convex part and a sleeve for rotating around the shaft C.
5. The intermediate position limiting device of the three-station operating mechanism as claimed in claim 2, wherein the limiting block and the pawl form a transverse V-shaped structure together, wherein the limiting block is arranged at the upper part, the pawl is arranged at the lower part, and the bottom surface of the pawl is an upwardly concave cambered surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910653035.8A CN112242267A (en) | 2019-07-19 | 2019-07-19 | Intermediate position limiting device of three-station operating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910653035.8A CN112242267A (en) | 2019-07-19 | 2019-07-19 | Intermediate position limiting device of three-station operating mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN112242267A true CN112242267A (en) | 2021-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910653035.8A Pending CN112242267A (en) | 2019-07-19 | 2019-07-19 | Intermediate position limiting device of three-station operating mechanism |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1268760A (en) * | 1999-03-30 | 2000-10-04 | 株式会社东芝 | Mechanism for operating three position switch e. g. off/star/delta |
| CN202633075U (en) * | 2011-09-26 | 2012-12-26 | 宁波兴邦电器有限公司 | Three-working-position electric operation mechanism for switching device |
| CN203179780U (en) * | 2013-03-07 | 2013-09-04 | 廖明厚 | Position-restricted and separating mechanism of single motor three station mechanism |
| CN103426661A (en) * | 2012-06-14 | 2013-12-04 | 洪蕾 | Bidirectional limiting and locking device of high-voltage electrical appliance operating mechanism |
| US20160307711A1 (en) * | 2013-12-13 | 2016-10-20 | Seari Electric Technology Co., Ltd. | Motor cam operating mechanism and transmission mechanism thereof |
| CN107170595A (en) * | 2017-06-05 | 2017-09-15 | 河南平高电气股份有限公司 | A kind of mechanical position limitation mechanism and three station operating mechanisms using the mechanism |
| CN107946128A (en) * | 2017-11-15 | 2018-04-20 | 中国西电电气股份有限公司 | The program locking device and its application method of a kind of three-station electric mechanism |
| CN209947737U (en) * | 2019-07-19 | 2020-01-14 | 武汉倍诺德开关有限公司 | Intermediate position limiting device of three-station operating mechanism |
-
2019
- 2019-07-19 CN CN201910653035.8A patent/CN112242267A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1268760A (en) * | 1999-03-30 | 2000-10-04 | 株式会社东芝 | Mechanism for operating three position switch e. g. off/star/delta |
| CN202633075U (en) * | 2011-09-26 | 2012-12-26 | 宁波兴邦电器有限公司 | Three-working-position electric operation mechanism for switching device |
| CN103426661A (en) * | 2012-06-14 | 2013-12-04 | 洪蕾 | Bidirectional limiting and locking device of high-voltage electrical appliance operating mechanism |
| CN203179780U (en) * | 2013-03-07 | 2013-09-04 | 廖明厚 | Position-restricted and separating mechanism of single motor three station mechanism |
| US20160307711A1 (en) * | 2013-12-13 | 2016-10-20 | Seari Electric Technology Co., Ltd. | Motor cam operating mechanism and transmission mechanism thereof |
| CN107170595A (en) * | 2017-06-05 | 2017-09-15 | 河南平高电气股份有限公司 | A kind of mechanical position limitation mechanism and three station operating mechanisms using the mechanism |
| CN107946128A (en) * | 2017-11-15 | 2018-04-20 | 中国西电电气股份有限公司 | The program locking device and its application method of a kind of three-station electric mechanism |
| CN209947737U (en) * | 2019-07-19 | 2020-01-14 | 武汉倍诺德开关有限公司 | Intermediate position limiting device of three-station operating mechanism |
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