CN116798799A - Three-station spring driving mechanism - Google Patents
Three-station spring driving mechanism Download PDFInfo
- Publication number
- CN116798799A CN116798799A CN202210244643.5A CN202210244643A CN116798799A CN 116798799 A CN116798799 A CN 116798799A CN 202210244643 A CN202210244643 A CN 202210244643A CN 116798799 A CN116798799 A CN 116798799A
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- CN
- China
- Prior art keywords
- crank arm
- input
- output
- clutch
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 39
- 230000006835 compression Effects 0.000 claims abstract description 8
- 238000007906 compression Methods 0.000 claims abstract description 8
- 238000002955 isolation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/38—Driving mechanisms, i.e. for transmitting driving force to the contacts using spring or other flexible shaft coupling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/015—Boards, panels, desks; Parts thereof or accessories therefor
- H02B1/04—Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention provides a three-station spring driving mechanism for a ring main unit, which comprises an output shaft and input shafts symmetrically arranged at two sides below the output shaft, wherein an input crank arm and a clutch crank arm are respectively arranged on the same input shaft front and back; the other end of the input crank arm is rotatably connected with the spring compression mechanism; the clutch crank arm is connected with an output crank arm fixed on the output shaft through a connecting rod, and one end of the clutch crank arm is rotatably connected with the input shaft through a lost motion. The driving mechanism of the invention uses the spring compression mechanism to drive and work, and can be used in three-station or two-station products according to different use occasions. The two input shafts respectively drive the output shaft to rotate the same angle in the forward and reverse directions and return. Because of the symmetrical arrangement, the parts on two sides are the same, and the driving mechanism has the advantages of simple structure and reliable performance.
Description
Technical Field
The invention relates to an isolation knife driving mechanism of a medium-voltage ring main unit mechanism, which is used for driving a ring main unit isolation knife to realize the switching between given stations.
Background
In the electric power transmission and distribution system, the ring main unit is used in a large amount due to the advantages of flexible arrangement, small occupied area, convenient installation and the like. The ring main unit can be divided into two stations and three stations according to the stations of the isolating knife, and the switching of the isolating knife between preset stations can finish ring network cutting-off, switching and maintenance work. The switching work of the isolating knife is completed by an operating mechanism arranged at the front end of the isolating knife.
The station of the ring main unit isolation knife is designed and determined in advance, so that the operation mechanism is required to accurately drive the isolation knife to reach a preset station, and the operation mechanism can respond to control signals in time and can complete the responsive conversion action in a life cycle. Meanwhile, in order to adapt to different designs and application occasions, the mechanism must meet the conversion requirements of two stations or three stations, and the output position is easy to adjust and reliable in movement.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides the three-station spring driving mechanism for the medium-voltage ring main unit, which has the advantages of simple structure and high reliability.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the three-station spring driving mechanism comprises an output shaft and input shafts symmetrically arranged on two sides below the output shaft, wherein an input crank arm and a clutch crank arm are respectively arranged on the same input shaft in front and back; one end of the input crank arm is fixedly connected with the input shaft, and the other end of the input crank arm is rotatably connected with the spring compression mechanism; the clutch crank arm is connected with an output crank arm fixed on the output shaft through a connecting rod, one end of the clutch crank arm is rotatably connected with the input shaft through a free stroke, and the clutch crank arm drives the output crank arm to rotate through the connecting rod after rotating.
The spring compression mechanism comprises a guide rod and a cylindrical spring, two ends of the guide rod are respectively hinged with the input crank arm, the cylindrical spring is sleeved on the guide rod, two end heads of the cylindrical spring are positioned on the inner side of the input crank arm, and the input crank arm compresses the cylindrical spring to shrink after rotating.
The guide rod and the input crank arm are hinged in the following way: the two ends of the guide rod are provided with shaft holes, and the pin shaft passes through the shaft holes and then is hinged with the guide rod and the input crank arm.
The two ends of the cylindrical spring are provided with baffle rings, and the input crank arm compresses the cylindrical spring by pushing the baffle rings.
And two ends of the connecting rod are respectively and rotatably connected with the clutch crank arm and the output crank arm.
The rotation connection with idle stroke is as follows: the clutch crank arm is sleeved on the input shaft, a section of arc notch is formed in the inner wall, in contact with the input shaft, of the clutch crank arm, a clutch pin is correspondingly arranged on the input shaft, protrudes outwards from the surface of the input shaft and stretches into the arc notch, and after the input shaft rotates, the clutch pin is driven to idle from one side to the other side in the arc notch, and then the clutch crank arm is driven to rotate.
The output crank arm is a triangular plate, and the output shaft penetrates through the output crank arm at the vertex angle of the triangular plate and is fixedly connected with the output crank arm; the connecting rod is rotatably connected with the output crank arm at two bottom corners of the triangular plate.
And limiting shafts are arranged on the outer sides of the upper part and the lower part of the input shaft and used for limiting the rotation of the input crank arm.
The connecting rod is provided with a strip-shaped groove at the joint of the connecting rod and the output crank arm, and the pin shaft penetrates through the strip-shaped groove and is rotatably connected with the output crank arm.
The output shaft can realize an output angle of 30-60 degrees in the forward and reverse directions.
The beneficial effects of the invention are as follows:
1) The invention can be used as a two-station or three-station operating mechanism according to different use environments;
2) The invention can change the forward and reverse rotation angles of the output shaft according to different use and design requirements, and has strong adaptability;
3) The input shaft of the invention is positioned on both sides of the output shaft and is symmetrical to the midline. The parts on two sides are the same, the structure is simple, and the reliability is strong.
Drawings
The invention will be further described with reference to the accompanying drawings
FIG. 1 is a schematic view of the overall structure of a driving mechanism according to the present invention;
FIG. 2 is a front view of the drive mechanism of the present invention;
FIG. 3 is a top view of the drive mechanism of the present invention;
FIG. 4 is a schematic diagram of a connection structure of a clutch lever and an input shaft;
FIG. 5 is a state diagram of the driving mechanism of the present invention in a left turn position;
fig. 6 is a state diagram of the driving mechanism in the right turn position according to the present invention.
Wherein:
1-an output shaft; 2-an output crank arm; 3-connecting rod; 4-limiting shafts; 5-left input shaft; 6-input crank arm; 7-a baffle ring; 8-a guide rod; 9-a cylindrical spring; 10-clutch crank arms; 11-right input shaft; 12-a clutch pin; 13-arc-shaped notch; 31-elongated slots.
Detailed Description
The invention is further described in the following description and detailed description with reference to the drawings:
example 1
Embodiment 1 of the present invention provides a three-position spring driving mechanism, which comprises an output shaft 1 and input shafts (a left input shaft 5 and a right input shaft 11) symmetrically arranged on two sides below the output shaft 1, as shown in fig. 1-3. An input crank arm 6 and a clutch crank arm 10 are respectively arranged on the same input shaft (5, 11) front and back; one end of the input crank arm 6 is fixedly connected with the input shafts (5, 11), and the other end of the input crank arm 6 is rotatably connected with the spring compression mechanism.
The spring compression mechanism comprises a guide rod 8 and a cylindrical spring 9, two ends of the guide rod 8 are respectively hinged with the input crank arm 6, the cylindrical spring 9 is sleeved on the guide rod 8, two end heads of the cylindrical spring 9 are positioned on the inner side of the input crank arm 6, and the cylindrical spring 9 is compressed after the input crank arm 6 rotates. The guide rod 9 is hinged with the input crank arm 6 in the following way: the two ends of the guide rod 8 are provided with shaft holes, and the pin shaft passes through the shaft holes to hinge and connect the guide rod 8 with the input crank arm 6. The two ends of the cylindrical spring 9 are provided with baffle rings 7, and the input crank arm 6 pushes the baffle rings 7 through a pin shaft to compress the cylindrical spring 9.
The clutch crank arm 10 is connected with the output crank arm 2 fixed on the output shaft 1 through the connecting rod 3, one end of the clutch crank arm 10 is rotatably connected with the input shafts (5 and 11) through idle stroke, one end of the input shaft idles and then drives the clutch crank arm 10 to rotate after rotating, the tail end of the clutch crank arm 10 is rotatably connected with the connecting rod 3, and the other end of the connecting rod 3 is rotatably connected with the output crank arm 2. After the clutch crank arm 10 rotates, the output crank arm 2 is driven to rotate by the connecting rod 3.
The rotatable connection with idle stroke is as shown in fig. 4: the clutch crank arm 10 is sleeved on the input shaft 5, a section of arc notch 13 is formed in the inner wall of the clutch crank arm 10, which is in contact with the input shaft 5, a clutch pin 12 is correspondingly arranged on the input shaft 5, the clutch pin 12 protrudes outwards from the surface of the input shaft 5 and stretches into the arc notch 13, and after the input shaft 5 rotates, the clutch pin 12 is driven to idle from one side to the other side in the arc notch 13, and then the clutch crank arm 10 is driven to rotate.
The output crank arm 2 is a triangular plate, and the output shaft 1 penetrates through the output crank arm 2 at the vertex angle of the triangular plate and is fixedly connected with the output crank arm 2; the connecting rod 3 is rotatably connected with the output crank arm 2 at two bottom corners of the triangular plate, a long-strip-shaped groove 31 is arranged at the joint of the connecting rod 3 and the output crank arm 2, and the pin shaft penetrates through the long-strip-shaped groove 31 and is rotatably connected with the output crank arm 2.
And limiting shafts 4 are arranged on the outer sides of the upper part and the lower part of the input shafts (5, 11), and the limiting shafts 4 are used for limiting the rotation of the input crank arms.
The default state of the driving mechanism is a middle position, as shown in fig. 1. When the clutch lever is used, the left input shaft 5 is rotated anticlockwise, the input lever 6 pushes the baffle ring 7, the cylindrical spring 9 is compressed, and the clutch lever 10 is not rotated at this time because the clutch lever 10 is in idle rotation connection with the left input shaft 5. When the input crank arm rotates to a critical angle, the cylindrical spring 9 is compressed to the maximum, then the rotation is continued, the cylindrical spring 9 starts to open reversely, the input crank arm 6 is pushed to rotate continuously under the elastic action of the cylindrical spring 9, the input shaft 5 is driven to rotate, the idle stroke of the input shaft 5 is completed at this time, the clutch crank arm 10 is driven to rotate, the connecting rod 3 is driven to move upwards, and the output crank arm 2 and the output shaft 1 are driven to rotate clockwise by an angle of a to the left rotation position, as shown in fig. 5. The left input shaft 5 is rotated clockwise and the output shaft 1 returns to the horizontal position. Since the right input shaft 11 and the left input shaft 5 are symmetrical about the center, it drives the output shaft 1 to rotate counterclockwise by a ° to the right turn position as shown in fig. 6.
In the invention, the rotation angle a of the output shaft 1 defaults to 45 degrees, the rotation angle a is changed by adjusting the length of the connecting rod 3 and the length of the arc notch on the clutch crank arm 10, the range is 30-60 degrees, and the rotation angle a is symmetrical in the forward and reverse directions.
Those skilled in the art will recognize that a wide variety of modifications, alterations, and combinations can be made with respect to the above described embodiments without departing from the scope of the invention, and that such modifications, alterations, and combinations are to be viewed as being within the ambit of the inventive concept.
Claims (10)
1. The utility model provides a three station spring actuating mechanism, includes output shaft and symmetry setting at the input shaft of output shaft below both sides, its characterized in that:
an input crank arm and a clutch crank arm are respectively arranged on the same input shaft front and back;
one end of the input crank arm is fixedly connected with the input shaft, and the other end of the input crank arm is rotatably connected with the spring compression mechanism;
the clutch crank arm is connected with an output crank arm fixed on the output shaft through a connecting rod, one end of the clutch crank arm is rotatably connected with the input shaft through a free stroke, and the clutch crank arm drives the output crank arm to rotate through the connecting rod after rotating.
2. The three-station spring driving mechanism according to claim 1, wherein the spring compression mechanism comprises a guide rod and a cylindrical spring, two ends of the guide rod are respectively hinged with the input crank arm, the cylindrical spring is sleeved on the guide rod, two end heads of the cylindrical spring are positioned on the inner side of the input crank arm, and the input crank arm compresses the cylindrical spring after rotating.
3. The three-position spring driving mechanism according to claim 2, wherein the guide rod is hinged with the input crank arm in the following manner: the two ends of the guide rod are provided with shaft holes, and the pin shaft passes through the shaft holes and then is hinged with the guide rod and the input crank arm.
4. A three-position spring drive mechanism as in claim 3 wherein said cylindrical spring has stop rings at both ends and said input crank arm compresses the cylindrical spring by pushing the stop rings.
5. The three-position spring drive mechanism of claim 1, wherein two ends of the connecting rod are rotatably connected with the clutch lever and the output lever respectively.
6. The three-position spring drive mechanism of claim 5, wherein said lost motion rotational connection is: the clutch crank arm is sleeved on the input shaft, a section of arc notch is formed in the inner wall, in contact with the input shaft, of the clutch crank arm, a clutch pin is correspondingly arranged on the input shaft, protrudes outwards from the surface of the input shaft and stretches into the arc notch, and after the input shaft rotates, the clutch pin is driven to idle from one side to the other side in the arc notch, and then the clutch crank arm is driven to rotate.
7. The three-position spring driving mechanism according to claim 1, wherein the output crank arm is a triangular plate, and the output shaft penetrates through the output crank arm at the vertex angle of the triangular plate and is fixedly connected with the output crank arm; the connecting rod is rotatably connected with the output crank arm at two bottom corners of the triangular plate.
8. The three-position spring driving mechanism according to claim 1, wherein limiting shafts are arranged on the outer sides of the upper portion and the lower portion of the input shaft, and the limiting shafts are used for limiting rotation of the input crank arms.
9. The three-position spring driving mechanism according to claim 1, wherein a strip-shaped groove is formed at the joint of the connecting rod and the output crank arm, and the pin shaft penetrates through the strip-shaped groove and is rotatably connected with the output crank arm.
10. The three-position spring driving mechanism according to claim 1, wherein the output shaft can realize an output angle of 30-60 degrees in the forward and reverse directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210244643.5A CN116798799A (en) | 2022-03-15 | 2022-03-15 | Three-station spring driving mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210244643.5A CN116798799A (en) | 2022-03-15 | 2022-03-15 | Three-station spring driving mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116798799A true CN116798799A (en) | 2023-09-22 |
Family
ID=88035101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210244643.5A Pending CN116798799A (en) | 2022-03-15 | 2022-03-15 | Three-station spring driving mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116798799A (en) |
-
2022
- 2022-03-15 CN CN202210244643.5A patent/CN116798799A/en active Pending
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