CN113506703A - Three-phase transmission mechanism and porcelain knob type circuit breaker - Google Patents
Three-phase transmission mechanism and porcelain knob type circuit breaker Download PDFInfo
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- CN113506703A CN113506703A CN202110579940.0A CN202110579940A CN113506703A CN 113506703 A CN113506703 A CN 113506703A CN 202110579940 A CN202110579940 A CN 202110579940A CN 113506703 A CN113506703 A CN 113506703A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/42—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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The invention relates to a three-phase transmission mechanism and a porcelain knob type circuit breaker. Three-phase drive mechanism includes: the middle phase crank arm is provided with a middle phase positioning hole; the middle phase pull rod is hinged on the middle phase crank arm; the two side phase connecting levers are respectively positioned at two sides of the middle phase connecting lever and are provided with side phase positioning holes; the side phase pull rod is hinged on the corresponding side phase crank arm; the adjusting rod is arranged between the middle phase pull rod and the side phase pull rod, and the adjusting rod and at least one of the middle phase pull rod and the side phase pull rod form a telescopic rod structure so as to adjust the distance between the middle phase pull rod and the side phase pull rod; the middle phase positioning hole is matched with the middle phase adaptive positioning hole in the middle phase crank arm box so as to position the middle phase crank arm at the brake separating position, and the side phase positioning hole is matched with the side phase adaptive positioning hole in the side phase crank arm box so as to position the side phase crank arm at the brake separating position.
Description
Technical Field
The invention relates to a three-phase transmission mechanism and a porcelain knob type circuit breaker.
Background
When the porcelain knob type circuit breaker is used for switching off and switching on, the phenomenon that three phases are different in phase can occur, and the smaller the different phase is, the better the switching-off and switching-on operations are. When the circuit breaker is switched on and switched off, if three phases are not in different phases seriously, the non-full-phase access or the removal of a circuit or electric equipment is caused, overvoltage which endangers insulation can be generated, and meanwhile, the contact of the circuit breaker can be damaged, so that the synchronism requirement of the circuit breaker is ensured.
At present, a three-phase transmission mechanism widely adopted by a porcelain column type circuit breaker has the length of a connecting rod which is not adjustable. During assembly, if the synchronization of the product is to be adjusted, the single pole of the circuit breaker needs to be detached from the connecting position of the crank arm box, the synchronization of the product can be adjusted only by exposing the adjusting rod for adjusting the length of the main contact insulation pull rod, and if the synchronization is not adjusted, the single pole needs to be detached again, so that the operation is complex, and the time consumption is long.
Disclosure of Invention
The invention aims to provide a three-phase transmission mechanism, which aims to solve the technical problem that the circuit breaker in the prior art needs an adjusting rod for adjusting the length of a main contact insulation pull rod to adjust the product in the same period, so that the adjustment is complicated; the invention also aims to provide the porcelain knob type circuit breaker.
In order to achieve the purpose, the technical scheme of the three-phase transmission mechanism is as follows:
three-phase drive mechanism includes:
the middle phase crank arm is provided with a middle phase positioning hole;
the middle phase pull rod is hinged on the middle phase crank arm;
the two side phase connecting levers are respectively positioned at two sides of the middle phase connecting lever and are provided with side phase positioning holes;
the side phase pull rod is hinged on the corresponding side phase crank arm;
the adjusting rod is arranged between the middle phase pull rod and the side phase pull rod, and the adjusting rod and at least one of the middle phase pull rod and the side phase pull rod form a telescopic rod structure so as to adjust the distance between the middle phase pull rod and the side phase pull rod;
the middle phase positioning hole is matched with a middle phase adaptive positioning hole on the middle phase crank arm box so as to position the middle phase crank arm at the opening position, and the side phase positioning hole is matched with a side phase adaptive positioning hole on the side phase crank arm box so as to position the side phase crank arm at the opening position; or the middle phase positioning hole is matched with the middle phase adaptive positioning hole on the middle phase crank arm box so as to position the middle phase crank arm at the switching-on position, and the side phase positioning hole is matched with the side phase adaptive positioning hole on the side phase crank arm box so as to position the side phase crank arm at the switching-on position.
The beneficial effects are that: the distance between the middle phase pull rod and the corresponding side phase pull rod is adjusted through the adjusting rod, so that the three-phase synchronous on-off requirement is met, and the operation is simpler; in addition, the opening position or the closing position of the circuit breaker is positioned by matching the positioning holes in the crank arm and the crank arm box, and the adjusting rod only needs to be finely adjusted, so that the adjusting range can be reduced, and the adjusting efficiency is improved.
As a further improvement, the two ends of the adjusting rod are respectively provided with an external thread, the rotating directions of the two external threads are opposite, and the middle phase pull rod and the corresponding side phase pull rod are respectively provided with an internal thread matched with the two external threads.
The beneficial effects are that: design like this for adjust the regulation of pole comparatively portably and the reliability is high, compares in the one end that only adjusts the pole moreover and sets up the external screw thread, improvement that can be further adjust efficiency.
As a further improvement, two ends of the adjusting rod are respectively provided with internal threads, the rotating directions of the two internal threads are opposite, and the middle phase pull rod and the corresponding side phase pull rod are respectively provided with external threads matched with the two internal threads.
The beneficial effects are that: design like this for adjust the regulation of pole comparatively portably and the reliability is high, compares in the one end that only adjusts the pole moreover and sets up the internal thread, improvement that can be further adjust efficiency.
As a further improvement, the adjusting rod is of a sleeve structure.
The beneficial effects are that: the design like this, to the internal thread of same length, the length that enables the regulation pole is as short as possible, is convenient for rotate the regulation pole like this.
As a further improvement, the external thread is in threaded connection with a locking nut.
The beneficial effects are that: the locking nut locks the adjusting rod after the adjusting rod is adjusted in place, and the adjusting rod and the corresponding pull rod are prevented from rotating relatively.
As a further improvement, the middle phase crank arm comprises a first crank arm and a second crank arm which are arranged in a V shape, the middle phase pull rod is hinged to the first crank arm, the middle phase positioning hole is formed in the first crank arm, and the second crank arm is used for being in transmission connection with the operating mechanism.
The beneficial effects are that: the design enables the driving force to be transmitted from the middle phase to the two side phases, and is beneficial to ensuring the synchronization of the three phases.
As a further improvement, the middle phase positioning hole and/or the side phase positioning hole are positioning through holes.
The beneficial effects are that: by the design, the positioning pin can be inserted conveniently.
As a further improvement, the length of the adjusting rod is smaller than that of the side phase pull rod and smaller than that of the middle phase pull rod.
The beneficial effects are that: the length of the adjusting rod is designed to be shorter, so that the rotating adjusting rod is facilitated.
As a further improvement, the diameters of the adjusting rod, the side phase pull rod and the middle phase pull rod are the same.
In order to achieve the purpose, the technical scheme of the porcelain column type circuit breaker is as follows:
porcelain column type circuit breaker, including limit looks monopole and well looks monopole, the below of limit looks monopole is equipped with limit looks turning arm box, and well looks monopole's below is equipped with well looks turning arm box, is equipped with three-phase drive mechanism between limit looks turning arm box and the well looks turning arm box, and limit looks turning arm box has limit looks adaptation locating hole, and well looks turning arm box has well looks adaptation locating hole, and three-phase drive mechanism includes:
the middle phase crank arm is provided with a middle phase positioning hole;
the middle phase pull rod is hinged on the middle phase crank arm;
the two side phase connecting levers are respectively positioned at two sides of the middle phase connecting lever and are provided with side phase positioning holes;
the side phase pull rod is hinged on the corresponding side phase crank arm;
the adjusting rod is arranged between the middle phase pull rod and the side phase pull rod, and the adjusting rod and at least one of the middle phase pull rod and the side phase pull rod form a telescopic rod structure so as to adjust the distance between the middle phase pull rod and the side phase pull rod;
the middle phase positioning hole is matched with a middle phase adaptive positioning hole on the middle phase crank arm box so as to position the middle phase crank arm at the opening position, and the side phase positioning hole is matched with a side phase adaptive positioning hole on the side phase crank arm box so as to position the side phase crank arm at the opening position; or the middle phase positioning hole is matched with the middle phase adaptive positioning hole on the middle phase crank arm box so as to position the middle phase crank arm at the switching-on position, and the side phase positioning hole is matched with the side phase adaptive positioning hole on the side phase crank arm box so as to position the side phase crank arm at the switching-on position.
The beneficial effects are that: the distance between the middle phase pull rod and the corresponding side phase pull rod is adjusted through the adjusting rod, so that the three-phase synchronous on-off requirement is met, and the operation is simpler; in addition, the opening position or the closing position of the circuit breaker is positioned by matching the positioning holes in the crank arm and the crank arm box, and the adjusting rod only needs to be finely adjusted, so that the adjusting range can be reduced, and the adjusting efficiency is improved.
As a further improvement, the two ends of the adjusting rod are respectively provided with an external thread, the rotating directions of the two external threads are opposite, and the middle phase pull rod and the corresponding side phase pull rod are respectively provided with an internal thread matched with the two external threads.
The beneficial effects are that: design like this for adjust the regulation of pole comparatively portably and the reliability is high, compares in the one end that only adjusts the pole moreover and sets up the external screw thread, improvement that can be further adjust efficiency.
As a further improvement, two ends of the adjusting rod are respectively provided with internal threads, the rotating directions of the two internal threads are opposite, and the middle phase pull rod and the corresponding side phase pull rod are respectively provided with external threads matched with the two internal threads.
The beneficial effects are that: design like this for adjust the regulation of pole comparatively portably and the reliability is high, compares in the one end that only adjusts the pole moreover and sets up the internal thread, improvement that can be further adjust efficiency.
As a further improvement, the adjusting rod is of a sleeve structure.
The beneficial effects are that: the design like this, to the internal thread of same length, the length that enables the regulation pole is as short as possible, is convenient for rotate the regulation pole like this.
As a further improvement, the external thread is in threaded connection with a locking nut.
The beneficial effects are that: the locking nut locks the adjusting rod after the adjusting rod is adjusted in place, and the adjusting rod and the corresponding pull rod are prevented from rotating relatively.
As a further improvement, the middle phase crank arm comprises a first crank arm and a second crank arm which are arranged in a V shape, the middle phase pull rod is hinged to the first crank arm, the middle phase positioning hole is formed in the first crank arm, and the second crank arm is used for being in transmission connection with the operating mechanism.
The beneficial effects are that: the design enables the driving force to be transmitted from the middle phase to the two side phases, and is beneficial to ensuring the synchronization of the three phases.
As a further improvement, the middle phase positioning hole and/or the side phase positioning hole are positioning through holes.
The beneficial effects are that: by the design, the positioning pin can be inserted conveniently.
As a further improvement, the length of the adjusting rod is smaller than that of the side phase pull rod and smaller than that of the middle phase pull rod.
The beneficial effects are that: the length of the adjusting rod is designed to be shorter, so that the rotating adjusting rod is facilitated.
As a further improvement, the diameters of the adjusting rod, the side phase pull rod and the middle phase pull rod are the same.
Drawings
Fig. 1 is a schematic structural view of an embodiment 1 of a porcelain knob type circuit breaker according to the present invention;
FIG. 2 is a schematic structural view of a middle phase tie rod of FIG. 1;
FIG. 3 is a schematic structural view of the side phase tie bar of FIG. 1;
FIG. 4 is a schematic view of the structure of the adjustment lever of FIG. 1;
in the figure: 11. a side phase monopole; 12. a middle phase monopole; 13. a side phase crank arm; 14. a side phase pull rod; 15. locking the nut; 16. adjusting a rod; 17. a middle phase pull rod; 18. a middle phase crank arm; 19. a mechanism main pull rod; 20. a middle phase crank arm box; 21. a side phase crank arm box; 22. a middle phase positioning hole; 23. side phase positioning holes; 24. left-hand internal threads; 25. right-handed internal threads; 26. a middle phase hinge hole; 27. a left-handed screw; 28. side-to-side hinge holes; 29. a right-handed screw; 30. a middle phase transmission shaft; 31. a side phase transmission shaft; 32. a middle-phase hinged shaft; 33. side-phase hinged shafts; 34. a left-hand external thread; 35. and (4) right-handed external threads.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. Furthermore, the terms "front", "back", "upper", "lower", "left" and "right" are based on the orientations and positional relationships shown in the drawings and are only for convenience in describing the present invention, but do not indicate that the referred device or component must have a specific orientation, and thus, should not be construed as limiting the present invention.
The features and properties of the present invention are described in further detail below with reference to examples.
Embodiment 1 of the porcelain knob type circuit breaker of the present invention:
as shown in fig. 1, the porcelain-column type circuit breaker includes two side-phase monopoles 11 and two middle-phase monopoles 12, wherein the two side-phase monopoles 11 are arranged, and the middle-phase monopoles 12 are arranged between the two side-phase monopoles 11; an edge phase connecting lever box 21 is arranged below each edge phase single pole 11, each edge phase connecting lever box 21 is provided with an edge phase matching positioning hole and an edge phase transmission shaft 31, and each edge phase transmission shaft 31 is in transmission connection with an edge phase moving contact; a middle phase crank arm box 20 is arranged below the middle phase monopole 12, the middle phase crank arm box 20 is provided with a middle phase matching positioning hole and a middle phase transmission shaft 30, and the middle phase transmission shaft 30 is in transmission connection with the middle phase moving contact. Wherein, a three-phase transmission mechanism is arranged between the two side phase crank arm boxes 21 and the middle phase crank arm box 20.
In this embodiment, the three-phase transmission mechanism includes two middle phase crank arms 18, two side phase crank arms 13, a middle phase pull rod 17, two side phase pull rods 14, and an adjusting rod 16, wherein the middle phase crank arms 18 are located between the two side phase crank arms 13; two side phase tie rods 14 are provided, and a middle phase tie rod 17 is arranged between the two side phase tie rods 14. As shown in fig. 2 and 3, the middle phase tie rod 17 has a middle phase hinge hole 26, and the side phase tie rod 14 has a side phase hinge hole 28.
In this embodiment, one end of the side phase connecting lever 13 is assembled with the side phase transmission shaft 31 in a rotation stopping manner, and the other end of the side phase connecting lever 13 is hinged with the end of the side phase pull rod 14 through the side phase hinge shaft 33; the middle phase crank arm 18 comprises a first crank arm and a second crank arm which are arranged in a V shape, the joint of the first crank arm and the first crank arm is assembled with the middle phase transmission shaft 30 in a rotation stopping way, one end of the first crank arm, which is far away from the middle phase transmission shaft 30, is hinged with the middle phase pull rod 17 through a middle phase hinge shaft 32, and one end of the second crank arm, which is far away from the middle phase transmission shaft 30, is hinged with the mechanism main pull rod 19 of the operating mechanism. Wherein the side hinge axis 33 is installed through the side hinge hole 28 and the middle hinge axis 32 is installed through the middle hinge hole 26.
As shown in fig. 1, two adjusting rods 16 are provided, and the adjusting rods 16 are provided between the middle phase tie rod 17 and the corresponding side phase tie rod 14 to steplessly adjust the distance between the middle phase tie rod 17 and the side phase tie rod 14.
Taking the right adjusting rod 16 as an example, as shown in fig. 2 to 4, the adjusting rod 16 is a sleeve structure, two ends of the adjusting rod 16 are respectively provided with internal threads, and the rotation directions of the two internal threads are opposite, that is, the two internal threads are respectively a left-handed internal thread 24 and a right-handed internal thread 25; the middle phase pull rod 17 comprises two left-handed screws 27, the left-handed screws 27 are provided with left-handed external threads 34, and the left-handed external threads 34 are matched with the left-handed internal threads 24; the side phase pull rod 14 comprises a right-handed screw 29, the right-handed screw 29 is provided with a right-handed external thread 35, and the right-handed external thread 35 is matched with the right-handed internal thread 25. Wherein, the adjusting rod 16 and the middle phase pull rod 17, and the adjusting rod 16 and the side phase pull rod 14 form a telescopic rod structure. In other embodiments, the adjusting rod is of a sleeve structure, external threads are not arranged on the middle phase pull rod and the side phase pull rod, a threaded hole extending along the radial direction is formed in the adjusting rod, a set screw is arranged in the threaded hole, and the adjusting rod and the corresponding pull rod are fixed through the set screw after being adjusted in place in a telescopic mode along the left-right direction.
In this embodiment, the diameters of the adjusting rod 16, the side phase tie rod 14 and the middle phase tie rod 17 are the same, and the length of the adjusting rod 16 is smaller than the length of the side phase tie rod 14 and the length of the middle phase tie rod 17. The axes of the adjusting rod 16, the middle phase pull rod 17 and the two side phase pull rods 14 are overlapped, and the adjusting rod 16, the middle phase pull rod 17 and the two side phase pull rods 14 are positioned on the same side of the crank arm. In other embodiments, the length of the adjustment rods, the side phase tie rods, and the middle phase tie rods may be the same.
As shown in fig. 1, the left-handed screw 27 and the right-handed screw 29 are provided with locking nuts 15 to lock the adjusting rods 16 after the adjusting rods 16 are adjusted in place, so as to prevent the adjusting rods 16 from rotating relative to the corresponding screws. Wherein, a spring washer is arranged between the lock nut 15 and the adjusting rod 16 to further avoid the relative rotation between the adjusting rod 16 and the corresponding screw.
In this embodiment, the side phase connecting lever 13 is provided with a side phase positioning hole 23, and the side phase positioning hole 23 is located between the side phase transmission shaft 31 and the side phase hinge shaft 33; the middle phase crank arm 18 is provided with a middle phase positioning hole 22 on the first crank arm, and the middle phase positioning hole 22 is positioned between the middle phase transmission shaft 30 and the middle phase hinge shaft 32. The side positioning hole 23 and the middle positioning hole 22 are positioning through holes.
The middle phase positioning hole 22 is used for being matched with a middle phase matching positioning hole in the middle phase crank arm box 20 to position the middle phase crank arm 18 at the opening position, and the side phase positioning hole 23 is used for being matched with a side matching positioning hole in the side phase crank arm box 21 to position the side phase crank arm 13 at the opening position. Because the circuit breaker is not electrified during assembly, if the single pole is at the switching-on position, the moving contact is required to prop open the spring contact finger on the static contact seat, and thus, a larger operating force is required; and the single pole is at the opening position, and only a small operation force is needed, so that the side phase crank arm 13 and the middle phase crank arm 18 are selectively positioned at the opening position.
When in use, the operating mechanism drives the middle phase crank arm 18 to rotate through the mechanism main pull rod 19 so as to realize the action of the middle phase monopole 12, and simultaneously the middle phase crank arm 18 drives the side phase crank arm 13 to rotate through the middle phase pull rod 17, the adjusting rod 16 and the side phase pull rod 14 so as to realize the action of the two side phase monopoles 11 and further realize the simultaneous action of the three monopoles.
The specific steps for adjusting the synchronization of the three monopoles are as follows:
(1) inserting positioning pins into the side phase positioning holes 23 on the side phase crank arms 13 and the side phase matching positioning holes on the side phase crank arm boxes 21, and into the middle phase positioning holes 22 on the middle phase crank arms 18 and the middle phase matching positioning holes on the middle phase crank arm boxes 20 to position the three crank arms at the opening positions; then, installing an edge phase pull rod 14, a middle phase pull rod 17 and an adjusting rod 16, wherein the edge phase pull rod 14, the middle phase pull rod 17 and the adjusting rod 16 are theoretically proper positions;
(2) due to the existence of assembly errors, three monopoles are out of phase;
(3) pulling out the positioning pins on the side phase crank arm 13 and the middle phase crank arm 18, loosening the locking nuts 15 at the two ends of the adjusting rod 16, and slightly rotating the adjusting rod 16 in the forward direction or the reverse direction to adjust the distance between the middle phase pull rod 17 and the corresponding side phase pull rod 14 so as to adjust the distance between the main contacts of the corresponding single poles, thereby ensuring that the three single poles are synchronous; after that, the lock nut 15 is tightened again.
In the embodiment, the distance between the middle phase pull rod and the corresponding side phase pull rod is adjusted by rotating the adjusting rod, so that the three-phase synchronous on-off requirement is met, and the operation is simpler; the distance between the middle phase pull rod and the corresponding side phase pull rod is adjusted by means of the threaded connection length of the adjusting rod and the corresponding pull rod, the reliability is high, the overall structure is compact, and the installation space is saved. In addition, the opening position of the circuit breaker is positioned by matching the crank arm with the positioning holes in the crank arm box, so that the adjusting range can be reduced, and the adjusting efficiency is improved.
Embodiment 2 of the porcelain knob type circuit breaker of the present invention:
the present embodiment is different from embodiment 1 in that in embodiment 1, the middle phase positioning hole 22 is used for matching with the middle phase matching positioning hole on the middle phase crank arm box 20 to position the middle phase crank arm 18 at the opening position, and the side phase positioning hole 23 is used for matching with the side matching positioning hole on the side phase crank arm box 21 to position the side phase crank arm 13 at the opening position. In this embodiment, the middle phase positioning hole is used for matching with the middle phase matching positioning hole on the middle phase connecting lever box so as to position the middle phase connecting lever at the switching-on position, and the side phase positioning hole is used for matching with the side phase matching positioning hole on the side phase connecting lever box so as to position the side phase connecting lever at the switching-on position.
Embodiment 3 of the porcelain knob type circuit breaker of the present invention:
the difference between the present embodiment and embodiment 1 is that in embodiment 1, both ends of the adjusting rod 16 are respectively provided with a left-handed internal thread 24 and a right-handed internal thread 25; the middle phase pull rod 17 comprises two left-handed screws 27, the left-handed screws 27 are provided with left-handed external threads 34, and the left-handed external threads 34 are matched with the left-handed internal threads 24; the side phase pull rod 14 comprises a right-handed screw 29, the right-handed screw 29 is provided with a right-handed external thread 35, and the right-handed external thread 35 is matched with the right-handed internal thread 25. In the embodiment, both ends of the adjusting rod are respectively provided with a left-handed external thread and a right-handed external thread; the two ends of the middle phase pull rod are respectively provided with left-handed internal threads, and the left-handed internal threads are matched with the left-handed internal threads; the side phase pull rod is provided with a right-handed internal thread which is matched with the right-handed external thread; in this case, the adjusting rod may have a sleeve structure or a solid structure.
Embodiment 4 of the porcelain knob type circuit breaker of the present invention:
the present embodiment differs from embodiment 1 in that in embodiment 1, the middle phase crank arm 18 includes a first crank arm and a second crank arm arranged in a V-shape, the first crank arm is hinged with the middle phase link, and the second crank arm is hinged with the mechanism main link 19. In this embodiment, one of the two side-phase connecting levers includes a first connecting lever and a second connecting lever arranged in a V-shape, the first connecting lever is hinged to the side-phase pull rod, and the second connecting lever is hinged to the mechanism main pull rod.
Embodiment 5 of the porcelain knob type circuit breaker of the present invention:
the present embodiment is different from embodiment 1 in that in embodiment 1, both the side positioning hole 23 and the middle positioning hole 22 are positioning through holes. In this embodiment, limit looks locating hole and well looks locating hole are the locating blind hole, and the locating blind hole sets up towards the turning arm box, and at this moment, one of them one end of locating pin is equipped with the bullet tongue, and the bullet tongue is the tubular structure, is equipped with the pressure spring between bullet tongue and the locating pin, and the pressure spring is in the bullet tongue, and in the locating hole on the turning arm, the bullet tongue of the locating pin other end inserts in the locating hole on the turning arm box during location to with the turning arm location at the branch floodgate position.
Embodiment 6 of the porcelain knob type circuit breaker of the present invention:
the difference between the present embodiment and embodiment 1 is that in embodiment 1, both ends of the adjusting rod 16 are respectively provided with a left-handed internal thread 24 and a right-handed internal thread 25; the middle phase pull rod 17 comprises two left-handed screws 27, the left-handed screws 27 are provided with left-handed external threads 34, and the left-handed external threads 34 are matched with the left-handed internal threads 24; the side phase pull rod 14 comprises a right-handed screw 29, the right-handed screw 29 is provided with a right-handed external thread 35, and the right-handed external thread 35 is matched with the right-handed internal thread 25. In this embodiment, only one end of the adjusting rod is provided with an internal thread, the middle phase pull rod comprises two screw rods, each screw rod is provided with an external thread, the external threads are matched with the internal threads, and the other end of the adjusting rod is rotatably assembled with one end of the side phase pull rod.
The three-phase transmission mechanism according to the embodiment of the present invention has the same structure as that of any one of embodiments 1 to 6 of the aforementioned porcelain knob type circuit breaker, and will not be described again.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (10)
1. Three-phase drive mechanism, its characterized in that includes:
a middle phase crank arm (18) provided with a middle phase positioning hole (22);
the middle phase pull rod (17) is hinged on the middle phase crank arm (18);
two side phase crank arms (13) are arranged, the two side phase crank arms (13) are respectively positioned at two sides of the middle phase crank arm (18), and the side phase crank arms (13) are provided with side phase positioning holes (23);
the side phase pull rod (14) is hinged on the corresponding side phase crank arm (13);
the adjusting rod (16) is arranged between the middle phase pull rod (17) and the corresponding side phase pull rod (14), and the adjusting rod (16) and at least one of the middle phase pull rod (17) and the side phase pull rod (14) form a telescopic rod structure so as to adjust the distance between the middle phase pull rod (17) and the side phase pull rod (14);
the middle phase positioning hole (22) is matched with a middle phase matching positioning hole in the middle phase crank arm box (20) to position the middle phase crank arm (18) at a brake separating position, and the side phase positioning hole (23) is matched with a side phase matching positioning hole in the side phase crank arm box (21) to position the side phase crank arm (13) at a brake separating position; or the middle phase positioning hole (22) is used for matching with a middle phase matching positioning hole on the middle phase crank arm box (20) so as to position the middle phase crank arm (18) at the switching-on position, and the side phase positioning hole (23) is used for matching with a side phase matching positioning hole on the side phase crank arm box (21) so as to position the side phase crank arm (13) at the switching-on position.
2. The transmission mechanism as claimed in claim 1, characterized in that the two ends of the adjusting rod (16) are respectively provided with an external thread, the two external threads are opposite in rotation direction, and the middle phase pull rod (17) and the corresponding side phase pull rod (14) are respectively provided with an internal thread matched with the two external threads.
3. The transmission mechanism as claimed in claim 1, characterized in that the two ends of the adjusting rod (16) are respectively provided with an internal thread, the two internal threads are opposite in rotation direction, and the middle phase pull rod (17) and the corresponding side phase pull rod (14) are respectively provided with an external thread matched with the two internal threads.
4. A three-phase transmission according to claim 3, characterised in that the adjustment rod (16) is of a sleeve construction.
5. A three-phase transmission according to any of claims 2 to 4, wherein a lock nut (15) is threadedly connected to the external thread.
6. The transmission mechanism as claimed in any one of claims 1 to 4, characterized in that the middle phase crank arm (18) comprises a first crank arm and a second crank arm which are arranged in a V shape, the middle phase pull rod (17) is hinged on the first crank arm, the middle phase positioning hole (22) is arranged on the first crank arm, and the second crank arm is used for being in transmission connection with the operating mechanism.
7. The transmission mechanism as claimed in one of claims 1 to 4, characterized in that the centering bores (22) and/or the side centering bores (23) are positioning through bores.
8. The transmission according to any of the claims 1 to 4, characterized in that the length of the adjustment rod (16) is smaller than the length of the side phase tie (14) and smaller than the length of the middle phase tie (17).
9. Three-phase transmission according to one of claims 1 to 4, characterised in that the diameters of the adjusting rods (16), of the side phase tie rods (14) and of the middle phase tie rod (17) are identical.
10. Porcelain column type circuit breaker, including limit looks monopole (11) and well looks monopole (12), the below of limit looks monopole (11) is equipped with limit looks turning arm box (21), the below of well looks monopole (12) is equipped with well looks turning arm box (20), be equipped with three-phase drive mechanism between limit looks turning arm box (21) and well looks turning arm box (20), its characterized in that, limit looks turning arm box (21) have limit looks adaptation locating hole, well looks turning arm box (20) have well looks adaptation locating hole, three-phase drive mechanism be any one of claim 1 to 9 three-phase drive mechanism.
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| CN202110579940.0A CN113506703B (en) | 2021-05-26 | 2021-05-26 | Three-phase transmission mechanism and knob insulator type circuit breaker |
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| CN202110579940.0A CN113506703B (en) | 2021-05-26 | 2021-05-26 | Three-phase transmission mechanism and knob insulator type circuit breaker |
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| CN113506703B CN113506703B (en) | 2023-08-08 |
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| Publication number | Publication date |
|---|---|
| CN113506703B (en) | 2023-08-08 |
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