CN112750631A - Three-station operating mechanism - Google Patents
Three-station operating mechanism Download PDFInfo
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- CN112750631A CN112750631A CN201911056386.7A CN201911056386A CN112750631A CN 112750631 A CN112750631 A CN 112750631A CN 201911056386 A CN201911056386 A CN 201911056386A CN 112750631 A CN112750631 A CN 112750631A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 67
- 230000005540 biological transmission Effects 0.000 claims abstract description 108
- 238000002955 isolation Methods 0.000 claims abstract description 67
- 238000007789 sealing Methods 0.000 claims description 17
- 230000009467 reduction Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 description 37
- 230000008569 process Effects 0.000 description 37
- 239000000758 substrate Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
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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
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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
- H01H31/10—Interlocking mechanisms for interlocking two or more switches
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Abstract
The invention relates to the technical field of operating mechanisms, in particular to a three-station operating mechanism, which comprises: a housing; the clutch comprises a main rotating shaft, a clutch manual transmission gear and a clutch electric transmission gear; an isolated input shaft on which an isolated input gear is mounted; a ground input shaft on which a ground input gear is mounted; an electric input shaft on which an electric input gear is mounted; the isolation input gear is meshed with the grounding input gear and the clutch manual transmission gear, and the electric input gear is meshed with the clutch electric transmission gear; and each gear of the limiting gear train is a cylindrical gear and comprises a limiting input gear and a limiting output gear, a limiting block is arranged on the limiting output gear, a limiting transmission gear meshed with the limiting input gear is arranged on the main rotating shaft, and a stop block in stop fit with the limiting block is arranged on the gear of the grounding input shaft. Has the advantages that: all gears in the limiting gear train are cylindrical gears, and compared with worm gears and worms in the prior art, the processing cost can be reduced.
Description
Technical Field
The invention relates to the technical field of operating mechanisms, in particular to a three-station operating mechanism.
Background
The high-voltage electrical equipment switching device usually adopts a three-position switch operating mechanism, and a gear box of the common large-transformation-ratio three-position switch operating mechanism on the market mostly adopts a worm gear or a special-shaped cam mode, for example, the three-position switch operating mechanism disclosed by the Chinese utility model patent with the authorization publication number of CN205039087U comprises a shell, and a manual transmission gear train, a position feedback gear train, a limiting device and an output cam for driving a three-position switch, which are installed based on the shell.
The shell comprises a front substrate, a rear substrate and a support column, wherein the front substrate and the rear substrate are arranged in parallel, the support column is connected between the two substrates, and rotating shafts of the gears are arranged on the two substrates. The manual transmission gear train comprises an isolation input shaft, an isolation input gear installed on the isolation input shaft, a grounding input gear installed on the grounding input shaft and meshed with the isolation input gear, and a manual input cam meshed with the isolation input gear, wherein the manual input cam and the output cam are in transmission through a main rotating shaft. The position feedback gear train comprises a transmission gear set driven by the output cam, a bevel gear set driven by the transmission gear set and a worm and gear driven by the bevel gear set. The limiting device comprises a limiting stop arranged on the worm gear and rotating along with the worm gear and a limiting block arranged on the grounding input gear and matched with the limiting stop.
When the isolation switch-on is operated manually, the isolation input interface is driven by manpower to rotate clockwise through the operating handle, manual force is transmitted to the isolation input gear through the rotating shaft, the isolation input gear transmits the manual force to the manual force input cam, the manual force input cam receives the manual force and transmits the manual force to the output cam through the clutch device and the main rotating shaft, and the output cam drives the three-position switch to act; when the isolated closing electric operation is carried out, the motor generates clockwise rotating electric power to drive the electric transmission gear, the electric transmission gear transmits the electric power to the electric input cam, and the electric input cam receives the electric power and transmits the electric power to the output cam through the clutch device and the main rotating shaft; the isolation switching-off working process is opposite to the isolation switching-on working process.
When the grounding switch-on is manually operated, the grounding input interface is driven by manpower to rotate clockwise through the operating handle, manual force is transmitted to the grounding input gear through the rotating shaft, the grounding input gear transmits the manual force to the isolating input gear, the isolating input gear transmits the manual force to the manual force input cam, and the manual force input gear receives the manual force and transmits the manual force to the output cam through the clutch device and the main rotating shaft; when the grounding switch-on electric operation is carried out, the motor generates anticlockwise rotating electric power which is transmitted to the electric transmission gear through the output shaft, the electric transmission gear transmits the electric power to the electric power input cam, and the electric power input cam receives the electric power and transmits the electric power to the output cam through the clutch device and the main rotating shaft; the rotation direction of the grounding opening and closing work process is opposite to that of the grounding closing.
According to the three-position switch operating mechanism, the output cam can drive the worm and worm gear to rotate through the transmission gear set in the process of isolation switching and grounding switching of the three-position switch through the matching of the position feedback gear train and the limiting device, and finally drives the limiting stop on the worm gear to move and be matched with the limiting stop on the grounding input gear in a stopping manner, so that mechanical limiting is performed when the isolation switching and the grounding switching are finished, and the operation safety of the three-position switch is ensured.
However, it is known that the worm gear and the worm have high processing cost and low processing efficiency, and the manufacturing cost of the three-position switch operating mechanism is high. In addition, each gear of the three-position switch operating mechanism is arranged between the front substrate and the rear substrate, the upper, lower, left, right and periphery of the three-position switch operating mechanism are open, the three-position switch operating mechanism does not have a good waterproof and dustproof effect, and the three-position switch operating mechanism cannot form good protection on a gear transmission structure.
Disclosure of Invention
The invention aims to provide a three-position operating mechanism to solve the problem that the three-position operating mechanism in the prior art adopts a worm gear and a worm to cause higher manufacturing cost.
In order to achieve the purpose, the three-station operating mechanism adopts the following technical scheme:
a three-position operating mechanism comprises:
a housing;
the clutch comprises a main rotating shaft arranged on the shell, a clutch manual transmission gear and a clutch electric transmission gear, wherein the clutch manual transmission gear and the clutch electric transmission gear are arranged on the main rotating shaft;
the isolation input shaft is arranged on the shell and used for manual operation so as to enable the three-station operating mechanism to be switched between isolation and closing, and an isolation input gear is arranged on the isolation input shaft;
the grounding input shaft is arranged on the shell and used for manual operation so as to enable the three-station operating mechanism to be switched between isolation and grounding, and a grounding input gear is arranged on the grounding input shaft;
the electric input shaft is arranged on the shell and is used for being in transmission connection with the motor so as to enable the three-station operating mechanism to be switched between isolation and switching-on, isolation and grounding respectively through electric operation, and an electric input gear is arranged on the electric input shaft;
the grounding input gear is in meshing transmission with the isolating input gear, the isolating input gear is in meshing transmission with the clutch manual transmission gear, and the electric input gear is in meshing transmission with the clutch electric transmission gear;
the three-station operating mechanism further comprises:
the limiting gear train comprises a limiting input gear and a limiting output gear, the limiting input gear and the limiting output gear are subjected to at least one-stage speed reduction, all gears in the limiting gear train are cylindrical gears, a limiting block is arranged on the limiting output gear, a limiting transmission gear in meshing transmission with the limiting input gear is arranged on one of the isolating input shaft, the grounding input shaft and the main rotating shaft, a stop block in stop fit with the limiting block is arranged on the gear arranged on the other shaft of the isolating input shaft, the grounding input shaft and the main rotating shaft, and the gear where the stop block is arranged and the limiting output gear are in the same rotation direction, so that the limiting output gear is limited after rotating in place.
The beneficial effects of the above technical scheme are that: in the operation process of the three-station operating mechanism, the isolation input shaft, the grounding input shaft and the main rotating shaft all rotate, and one shaft of the isolation input shaft, the grounding input shaft and the main rotating shaft is provided with the limit transmission gear, so that the limit transmission gear is in meshing transmission with the limit input gear, the limit input gear in the limit gear train can be provided with rotating power, and finally the limit output gear can output rotating motion.
Because the limit output gear is provided with the limit block, the gear arranged on the other shaft of the isolation input shaft, the grounding input shaft and the main rotating shaft is provided with the stop block matched with the limit block in a blocking way, and the gear where the stop block is arranged and the limit output gear have the same steering direction, when the three-station operating mechanism runs, the stop block and the limit block rotate, and the stop block and the limit block can be matched in a blocking way at a certain moment through reasonable design, so that the limit output gear is limited after rotating in place.
Because each gear in the limiting gear train is a cylindrical gear, compared with a worm gear in the prior art, the processing cost can be reduced, and the manufacturing cost of the three-station operating mechanism is reduced.
Furthermore, in order to facilitate arrangement, the limit transmission gear is installed on the main rotating shaft, and the stop block is installed on the grounding input gear or the isolating input gear.
Furthermore, in order to enable the structure to be more reasonable and compact and facilitate the stop matching between the limiting block and the stop block, the limiting input gear and the limiting output gear are subjected to three-stage speed reduction, and the stop block is arranged on the grounding input gear.
Furthermore, in order to achieve a better waterproof and dustproof effect and form a better protection effect, the shell comprises a bottom shell and a cover plate fixed on the bottom shell, a closed space is enclosed by the bottom shell and the cover plate, and a sealing strip is arranged on a combining surface of the bottom shell and the cover plate.
Furthermore, in order to improve the sealing performance, sealing rings are arranged between the parts of the isolation input shaft, the grounding input shaft, the electric input shaft and the main rotating shaft which penetrate out of the shell and the shell.
Drawings
FIG. 1 is a front view of a three-position operating mechanism of the present invention;
FIG. 2 is a rear view of the three-position operating mechanism of the present invention;
FIG. 3 is an exploded view of FIG. 1;
FIG. 4 is an exploded view of FIG. 2;
FIG. 5 is a front view of a gear assembly in the three-position operating mechanism of the present invention;
FIG. 6 is a rear view of the gear assembly of the three-position operating mechanism of the present invention;
FIG. 7 is a top view of a gear drive arrangement within the three-position operating mechanism of the present invention;
FIG. 8 is a bottom view of the gear drive arrangement in the three-position operating mechanism of the present invention;
FIG. 9 is a perspective view of one perspective of a gear drive arrangement in the three-position operating mechanism of the present invention;
fig. 10 is a perspective view of another perspective of the gear drive arrangement in the three-position actuator of the present invention;
FIG. 11 is a sectional view taken along line A-A of FIG. 8;
fig. 12 is a sectional view taken along line B-B in fig. 8.
In the figure: 1. a main rotating shaft; 2. a cover plate; 2-1, fixing holes; 3. a grounded input shaft; 4. isolating the input shaft; 5. a bottom case; 5-1, mounting holes; 5-2, sealing the groove; 6. an electric input shaft; 7. a sealing strip; 8. an electric input gear; 9. a clutch electric drive gear; 10. a clutch manual transmission gear; 11. an isolated input gear; 12. a first stopper; 13. a ground input gear; 14. a second limiting block; 15. a limit output gear; 16. limiting an output shaft; 17. a second drive shaft; 18. a fourth gear; 19. a limiting input shaft; 20. a first gear; 21. a first drive shaft; 22. a third gear; 23. a second gear; 24. a limiting transmission gear; 25. a brake separating limit gear; 26. a limiting input gear; 27. a fifth gear; 28. a sixth gear; 29. a stopper; 30. a clutch.
Detailed Description
An embodiment of the three-station operating mechanism of the invention is shown in fig. 1 and 2, and comprises a shell composed of a bottom shell 5 and a cover plate 2, as shown in fig. 3 and 4, the bottom shell 5 is provided with a bottom wall and peripheral side walls, the bottom shell 5 and the cover plate 2 enclose a closed space, a gear transmission structure of the three-station operating mechanism is arranged in the closed space, in order to ensure better sealing performance, achieve better waterproof and dustproof effects and form better protection, a sealing strip 7 is arranged on a combined surface of the bottom shell 5 and the cover plate 2, and therefore, sealing grooves are arranged on the bottom shell 5 and the cover plate 2, for example, a sealing groove 5-2 on the bottom shell 5 is arranged.
In addition, the bottom shell 5 is provided with a mounting hole 5-1, the corresponding cover plate 2 is provided with a fixing hole 2-1, the bottom shell 5 and the cover plate 2 are fixedly connected through a fastener, the mounting hole 5-1 is located on the outer side of the sealing groove 5-2, and the fixing hole 2-1 is also located on the outer side of the corresponding sealing groove, so that the influence of gaps among the mounting hole, the fixing hole and the fastener on the protection effect of the shell is avoided.
The gear transmission structure of the three-station operating mechanism is shown in fig. 5-10 and comprises a clutch 30, an isolation input shaft 4, a grounding input shaft 3 and an electric input shaft 6. The clutch 30 comprises a main rotating shaft 1 arranged on the bottom shell 5 and the cover plate 2, a clutch manual transmission gear 10 and a clutch electric transmission gear 9 which are arranged on the main rotating shaft 1, wherein the main rotating shaft 1 is used for outputting power of the three-position operating mechanism so as to drive the three-position switch to act. It should be noted that the clutch 30 belongs to the existing product, and the detailed structure and operation principle thereof are not described in detail in the present invention, and reference may be made to a clutch device in patent document CN 204230086U.
The isolation input shaft 4 is installed on the bottom shell 5 and the cover plate 2, the isolation input shaft 4 is used for manual operation to enable the three-position operating mechanism to be switched between isolation and closing, and the isolation input gear 11 is installed on the isolation input shaft 4. The grounding input shaft 3 is arranged on the bottom shell 5 and the cover plate 2, the grounding input shaft 3 is used for manual operation to enable the three-position operating mechanism to be switched between isolation and grounding, and the grounding input shaft 3 is provided with a grounding input gear 13. An electric input shaft 6 is arranged on the bottom shell 5 and the cover plate 2, the electric input shaft 6 is used for being in transmission connection with a motor (not shown in the figure) so as to enable the three-position operating mechanism to be switched between isolation and closing, isolation and grounding respectively through electric operation, and an electric input gear 8 is arranged on the electric input shaft 6.
The electric input shaft 6, the main rotating shaft 1, the isolating input shaft 4 and the grounding input shaft 3 in the figure 5 are defined to be positioned at the upper part of the gear transmission structure, and the four shafts are sequentially arranged from left to right, wherein the grounding input gear 13 is in meshing transmission with the isolating input gear 11, the isolating input gear 11 is in meshing transmission with the clutch manual transmission gear 10, and the electric input gear 8 is in meshing transmission with the clutch electric transmission gear 9. When the isolating input shaft 4 and the grounding input shaft 3 are rotated by manual operation, the manual transmission gear 10 of the clutch can be driven to rotate, so that the main rotating shaft 1 outputs a rotating motion in a certain direction, and further the three-station switch motion is driven to switch among three stations. Of course, when the electric input gear 8 rotates, the clutch manual transmission gear 10 can also be driven to rotate, and electric switching is realized.
The gear transmission structure of the three-position operating mechanism further comprises a limiting gear train, wherein the limiting gear train comprises a limiting input shaft 19, a limiting input gear 26 and a first gear 20 which are arranged on the limiting input shaft 19, a first transmission shaft 21, a second gear 23 and a third gear 22 which are arranged on the first transmission shaft 21, a second transmission shaft 17, a fourth gear 18 and a fifth gear 27 which are arranged on the second transmission shaft 17, a limiting output shaft 16 and a limiting output gear 15 which is arranged on the limiting output shaft 16.
As shown in fig. 6, 9 and 10, the main rotating shaft 1 is further provided with a limit transmission gear 24, the limit transmission gear 24 is located at the rear side of the clutch manual transmission gear 10 and the clutch electric transmission gear 9, the limit transmission gear 24 is in meshing transmission with the limit input gear 26, and transmits power to the limit input gear 26, as shown in fig. 11; meanwhile, the first gear 20 and the second gear 23 are in meshing transmission, the third gear 22 and the fourth gear 18 are in meshing transmission, and the fifth gear 27 and the limit output gear 15 are in meshing transmission.
Furthermore, the outer diameter of the limit input gear 26 is larger than the outer diameter of the first gear 20, the outer diameter of the second gear 23 is larger than the outer diameter of the third gear 22, and the outer diameter of the fourth gear 18 is larger than the outer diameter of the fifth gear 27, so that three-stage speed reduction is actually performed between the limit input gear 26 and the limit output gear 15, and the limit input shaft 19, the first transmission shaft 21, the second transmission shaft 17, and the limit output shaft 16 are respectively provided with one larger gear and one smaller gear, which can be called as a double gear shaft.
The limiting output gear 15 is provided with two limiting blocks, namely a first limiting block 12 and a second limiting block 14, and the two limiting blocks are arranged at a certain angle. The grounding input gear 13 is provided with a stop block 29, the grounding input gear 13 and the limiting output gear 15 have the same rotation direction, when the three-station operating mechanism is used, the stop block 29 rotates along with the grounding input gear 13, the two limiting blocks rotate along with the limiting output gear 15, and at a certain moment, after the limiting output gear 15 rotates in place, the stop block 29 is in stop fit with the first limiting block 12 or the second limiting block 14, so that the closing or grounding action of the three-station operating mechanism is limited.
In addition, an opening limit gear 25 is rotatably mounted on the isolation input shaft 4, the opening limit gear 25 is located at the rear side of the isolation input gear 11, the isolation input gear 11 and the isolation input shaft 4 rotate synchronously, and the opening limit gear 25 and the isolation input shaft 4 are in relative rotation relation. The limit output shaft 16 is also provided with a sixth gear 28 which synchronously rotates, the sixth gear 28 is positioned at the rear side of the limit output gear 15, and the sixth gear 28 is in meshing transmission with the opening limit gear 25, so as to drive the opening limit gear 25 to rotate.
The opening limit gear 25 is provided with a limit interface, the limit interface is matched with a limit mechanism arranged in addition (belonging to the prior art), and in the process that the three-station operating mechanism is grounded to an opening or is switched on to the opening, the limit interface can ensure that the opening limit gear 25 stops rotating when reaching the opening position, so that the rotation of the sixth gear 28 is limited, and further, the rotation of the main rotating shaft 1 is limited through a series of gear transmission matching, and the opening position of the three-station operating mechanism is limited. Conversely, in the process from opening to grounding or from opening to closing, the limiting interface can not influence the operation of the three-station operating mechanism.
In addition, one end of the electric input shaft 6, the main rotating shaft 1, the isolation input shaft 4, the grounding input shaft 3, the limit input shaft 19, the first transmission shaft 21, the second transmission shaft 17 and the limit output shaft 16 is arranged on the bottom shell 5, the other end of the electric input shaft is arranged on the cover plate 2, and as shown in the combined drawings of fig. 1-4, one end of the main rotating shaft 1 penetrates out of the cover plate 2 so as to conveniently drive the three-position switch to act, and one end of the grounding input shaft 3, the isolation input shaft 4 and the electric input shaft 6 penetrates out of the bottom shell 5 so as to conveniently carry out manual operation or be in transmission connection with a motor. In order to ensure the sealing performance of the casing, sealing rings (not shown in the figure) are arranged between the parts of the electric input shaft 6, the main rotating shaft 1, the isolating input shaft 4 and the grounding input shaft 3 which penetrate out of the casing and the casing.
The working principle of the three-station operating mechanism comprises four processes:
firstly, the working process of isolation closing is carried out.
Before the process begins, the three-position switch is located at a switching-off position, and the isolation switching-on working process is to realize switching-off and switching-on of the three-position switch. The isolation switching-on working process can be realized in two modes, one mode is manual operation, and the other mode is electric operation.
During manual operation, the isolation input shaft 4 is driven to rotate anticlockwise through manual driving, so that the isolation input gear 11 rotates anticlockwise, the isolation input gear 11 drives the clutch manual transmission gear 10 to rotate clockwise, the isolation input gear 11 is separated from the electric input gear 8 through the clutch, namely the electric input gear 8 does not rotate, the main rotating shaft 1 rotates clockwise, and isolation switch-on output of the three-position switch is achieved. In the process, the isolating input gear 11 rotates the grounding input gear 13 clockwise.
During electric operation, the motor drives the electric input gear 8 to rotate anticlockwise so as to drive the clutch electric transmission gear 9 to rotate clockwise, and the clutch manual transmission gear 10 rotates clockwise through the clutch, namely, the clutch manual transmission gear 10 rotates along with the rotation, and at the moment, the clockwise rotation of the main rotating shaft 1 also realizes the isolated switching-on output of the three-station switch. In the process, the clutch manual transmission gear 10 drives the isolation input gear 11 to rotate anticlockwise, and further drives the grounding input gear 13 to rotate clockwise.
That is, in the manual operation and the electric operation, the main rotating shaft 1, the isolating input shaft 4, and the grounding input shaft 3 are all rotated, in this process, the limit transmission gear 24 on the main rotating shaft 1 drives the limit input gear 26 to rotate counterclockwise, and then the first gear 20 rotates counterclockwise, and the first gear 20 drives the second gear 23 to rotate clockwise, and then the third gear 22 rotates clockwise, and the third gear 22 drives the fourth gear 18 to rotate counterclockwise, and then the fifth gear 27 rotates counterclockwise, and the fifth gear 27 drives the limit output gear 15 to rotate clockwise.
Because the grounding input gear 13 also rotates clockwise, through reasonable design, when the three-position switch is switched on in place at a certain moment, the second limit block 14 just collides with the stop block 29 and is in stop fit with the stop block, so that the three-position operating mechanism is mechanically limited.
Then the isolation brake-separating working process is carried out.
Before the process begins, the three-position switch is in a switching-on position, and the isolation switching-off working process is to realize switching-on and switching-off of the three-position switch. The isolation switching-off working process can be realized in two modes, one mode is manual operation, the other mode is electric operation, and the two operation processes are completely opposite to the isolation switching-on working process. During manual operation, the isolating input shaft 4 is driven to rotate clockwise by hand; during electric operation, the motor drives the electric input gear 8 to rotate clockwise, and finally the main rotating shaft 1 is driven to rotate anticlockwise, so that the isolation opening output of the three-position switch is realized. In this process, the ground input gear 13 rotates counterclockwise.
In addition, in the process, the limit transmission gear 24 rotates counterclockwise along with the main rotating shaft 1, and finally drives the limit output shaft 16 to rotate counterclockwise, so that the sixth gear 28 on the limit output shaft 16 synchronously rotates counterclockwise, and the sixth gear 28 drives the opening limit gear 25 to rotate clockwise. According to a certain transmission ratio, the opening limit gear 25 can move to the middle position just, and the rotation stop of the opening position is ensured through the limit interface.
Then the working process of grounding and closing is carried out.
Before the process begins, the three-position switch is at a switching-off position, and the grounding switching-on working process is to realize switching-off to grounding of the three-position switch. The working process of grounding and closing can be realized in two modes, one mode is manual operation, and the other mode is electric operation.
During manual operation, the grounding input shaft 3 is driven to rotate anticlockwise manually, so that the grounding input gear 13 rotates anticlockwise, the grounding input gear 13 drives the isolating input gear 11 to rotate clockwise, the isolating input gear 11 drives the manual transmission gear 10 of the clutch to rotate anticlockwise, the manual transmission gear is separated from the electric input gear 8 through the clutch, the electric input gear 8 does not rotate, the main rotating shaft 1 rotates anticlockwise, and grounding switching-on output of the three-position switch is achieved.
During electric operation, the motor drives the electric input gear 8 to rotate clockwise, so that the clutch electric transmission gear 9 is driven to rotate anticlockwise, the clutch manual transmission gear 10 rotates anticlockwise through the clutch, the clutch manual transmission gear 10 rotates along with the clutch, and at the moment, the earthing switch-on output of the three-position switch is realized by the anticlockwise rotation of the main rotating shaft 1. In the process, the clutch manual transmission gear 10 drives the isolation input gear 11 to rotate clockwise, and further drives the grounding input gear 13 to rotate anticlockwise.
In the manual operation and the electric operation, the limit transmission gear 24 rotates counterclockwise along with the main rotating shaft 1, and then drives the limit input gear 26 to rotate clockwise, and then the first gear 20 rotates clockwise, the first gear 20 drives the second gear 23 to rotate counterclockwise, and then the third gear 22 rotates counterclockwise, the third gear 22 drives the fourth gear 18 to rotate clockwise, and then the fifth gear 27 rotates clockwise, and the fifth gear 27 drives the limit output gear 15 to rotate counterclockwise.
Because the grounding input gear 13 also rotates anticlockwise, through reasonable design, when the three-position switch is grounded in place at a certain moment, the first limiting block 12 just collides with the stop block 29 and is in stop fit, so that the three-position operating mechanism is mechanically limited.
And finally, the grounding brake-separating working process.
Before the process starts, the three-position switch is in a grounding position, and the grounding and opening working process is to realize grounding and opening of the three-position switch. The working process of grounding opening and closing can be realized in two modes, one mode is manual operation, the other mode is electric operation, and the two operation processes are completely opposite to the working process of grounding closing. During manual operation, the grounding input shaft 3 is driven to rotate clockwise by hand; during electric operation, the motor drives the electric input gear 8 to rotate anticlockwise, and finally the main rotating shaft 1 is driven to rotate clockwise, so that the grounding opening output of the three-position switch is realized.
In the process, the limit transmission gear 24 rotates clockwise along with the main rotating shaft 1, and finally drives the limit output shaft 16 to rotate clockwise, so that the sixth gear 28 on the limit output shaft 16 synchronously rotates clockwise, and the sixth gear 28 drives the opening limit gear 25 to rotate anticlockwise. According to a certain transmission ratio, the opening limit gear 25 just moves to the middle position, and the rotation stop of the opening position is ensured through the limit interface.
All gears in the gear transmission structure adopt cylindrical gears, and especially for a limiting gear train, compared with a worm gear in the prior art, the gear transmission structure can reduce the processing cost, so that the manufacturing cost of the three-position operating mechanism is reduced. In addition, the shell adopts a sealing structure, so that a better waterproof and dustproof effect can be achieved, and a better protection effect can be formed.
In addition, the number of the limiting blocks on the limiting output gear 15 is two, and the change of the input angle or the output angle or the number of turns can be realized under the condition of ensuring that the gear transmission ratio is unchanged by changing the relative position angle of the two limiting blocks, so that the isolation switching-on working process and the grounding switching-on working process can have different input and output angles or numbers of turns, and various requirements of customers can be fully met.
In other embodiments of the three-position operating mechanism, the isolating input shaft, the grounding input shaft, the electric input shaft and the main rotating shaft are directly in running fit with the shell without arranging a sealing ring between the parts of the isolating input shaft, the grounding input shaft, the electric input shaft and the main rotating shaft which penetrate out of the shell and the shell.
In other embodiments of the three-position operating mechanism, the housing may be formed by two substrates arranged in parallel at intervals, each transmission shaft is mounted on the two substrates, and the gear transmission structure is located between the two substrates.
In other embodiments of the three-station operating mechanism, when the limit transmission gear is installed on the main rotating shaft, two-stage speed reduction can be performed between the limit input gear and the limit output gear, only one transmission shaft is transited between the limit input shaft and the limit output shaft, namely, the number of the double gear shafts is three and is odd, the limit block is also arranged on the limit output gear, in order to limit the limit output gear, the limit block needs to be arranged on the isolation input gear, and the isolation input gear and the limit output gear at the moment rotate in the same direction.
In other embodiments of the three-position operating mechanism, when the limit transmission gear is installed on the main rotating shaft, the limit input gear and the limit output gear may also undergo only one-stage speed reduction, that is, the limit input gear and the limit output gear are directly engaged for transmission, and at this time, the stop block needs to be arranged on the grounding input gear.
In other embodiments of the three-station operating mechanism, when the limit transmission gear is installed on the main rotating shaft, the speed between the limit input gear and the limit output gear can be reduced by four or more stages, and only the stop block is required to be arranged on the gear rotating in the same direction as the limit output gear.
In other embodiments of the three-position operating mechanism, when the limit drive gear is mounted on the main rotating shaft, the stop block may be mounted on other gears on the grounding input shaft or the isolating input shaft instead of the grounding input gear or the isolating input gear.
In other embodiments of the three-station operating mechanism, the limit transmission gear may also be installed on the isolation input shaft or the grounding input shaft, and at this time, a gear needs to be arranged on a suitable shaft of the remaining two shafts to install the stopper, so as to ensure that the gear where the stopper is located and the limit output gear turn in the same direction.
Claims (5)
1. A three-position operating mechanism comprises:
a housing;
the clutch comprises a main rotating shaft arranged on the shell, a clutch manual transmission gear and a clutch electric transmission gear, wherein the clutch manual transmission gear and the clutch electric transmission gear are arranged on the main rotating shaft;
the isolation input shaft is arranged on the shell and used for manual operation so as to enable the three-station operating mechanism to be switched between isolation and closing, and an isolation input gear is arranged on the isolation input shaft;
the grounding input shaft is arranged on the shell and used for manual operation so as to enable the three-station operating mechanism to be switched between isolation and grounding, and a grounding input gear is arranged on the grounding input shaft;
the electric input shaft is arranged on the shell and is used for being in transmission connection with the motor so as to enable the three-station operating mechanism to be switched between isolation and switching-on, isolation and grounding respectively through electric operation, and an electric input gear is arranged on the electric input shaft;
the grounding input gear is in meshing transmission with the isolating input gear, the isolating input gear is in meshing transmission with the clutch manual transmission gear, and the electric input gear is in meshing transmission with the clutch electric transmission gear;
the three-station operating mechanism is characterized by further comprising:
the limiting gear train comprises a limiting input gear and a limiting output gear, the limiting input gear and the limiting output gear are subjected to at least one-stage speed reduction, all gears in the limiting gear train are cylindrical gears, a limiting block is arranged on the limiting output gear, a limiting transmission gear in meshing transmission with the limiting input gear is arranged on one of the isolating input shaft, the grounding input shaft and the main rotating shaft, a stop block in stop fit with the limiting block is arranged on the gear arranged on the other shaft of the isolating input shaft, the grounding input shaft and the main rotating shaft, and the gear where the stop block is arranged and the limiting output gear are in the same rotation direction, so that the limiting output gear is limited after rotating in place.
2. The three-position operating mechanism of claim 1, wherein the limit drive gear is mounted on the main rotating shaft and the stop is mounted on the grounded input gear or the isolated input gear.
3. The three-position operating mechanism of claim 2, wherein the limit input gear and the limit output gear undergo three-stage reduction, and the stop is mounted on the ground input gear.
4. The three-station operating mechanism as claimed in any one of claims 1 to 3, wherein the housing comprises a bottom shell and a cover plate fixed on the bottom shell, the bottom shell and the cover plate enclose a closed space, and a sealing strip is arranged on a combination surface of the bottom shell and the cover plate.
5. The three-position operating mechanism of claim 4, wherein sealing rings are disposed between the isolating input shaft, the grounding input shaft, the electric input shaft, and the main rotating shaft, which penetrate through the housing, and the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911056386.7A CN112750631A (en) | 2019-10-31 | 2019-10-31 | Three-station operating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911056386.7A CN112750631A (en) | 2019-10-31 | 2019-10-31 | Three-station operating mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN112750631A true CN112750631A (en) | 2021-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911056386.7A Pending CN112750631A (en) | 2019-10-31 | 2019-10-31 | Three-station operating mechanism |
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| CN (1) | CN112750631A (en) |
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