CN114400170A - Arc contact screwing wrench head of circuit breaker - Google Patents
Arc contact screwing wrench head of circuit breaker Download PDFInfo
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- CN114400170A CN114400170A CN202111525022.6A CN202111525022A CN114400170A CN 114400170 A CN114400170 A CN 114400170A CN 202111525022 A CN202111525022 A CN 202111525022A CN 114400170 A CN114400170 A CN 114400170A
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- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
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- 238000009434 installation Methods 0.000 abstract description 27
- 238000000034 method Methods 0.000 abstract description 16
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- 238000003780 insertion Methods 0.000 description 8
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
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- 229910052802 copper Inorganic materials 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention relates to a circuit breaker arc contact screwing wrench head which comprises a columnar main body, wherein one end of the columnar main body is a screwing end, the other end of the columnar main body is an installation end, a plurality of installation grooves are formed in the outer peripheral surface of the installation end, clamping plates are installed in the installation grooves, the clamping plates are in clearance fit with the installation grooves, the installation end comprises a large-diameter section and a small-diameter section, the installation grooves are provided with a large groove section located on the large-diameter section and a small groove section located on the small-diameter section, the small groove section penetrates through the end surface of the installation end, a baffle is fixed on the end surface of the installation end, the groove wall of the large groove section, which is far away from the small groove section, is a blocking side wall, the baffle is matched with the blocking side wall to axially limit the clamping plates, and the installation end is also provided with a radial limiting structure for radially limiting the clamping plates; insert the mounting groove with the cardboard, easy operation can avoid the part of the overhanging in the mounting groove of cardboard to receive great effort and warp at fixed mounting's in-process, is favorable to guaranteeing normal use.
Description
Technical Field
The invention relates to the technical field of high-voltage power transmission and transformation equipment, in particular to the field of special equipment specially suitable for manufacturing electric switch contacts, and particularly relates to a circuit breaker arc contact screwing wrench head.
Background
The high-voltage circuit breaker product plays two roles in the whole high-voltage transmission and distribution circuit: the method has the advantages that firstly, the control function is realized, namely, part of electrical equipment or lines are put into or quit operation according to the operation requirement of a power grid; the second is protection, that is, when the electrical equipment or circuit has a fault, the relay protection or automatic device sends a trip signal to cut off the breaker and quickly cut off the fault equipment or circuit from the power grid, so as to ensure the normal operation of the fault-free part in the power grid. Because the high-voltage circuit breaker has high on-off line voltage which is generally not lower than 11 ten thousand volts and high current which is not lower than 2000 amperes, electric arcs can be generated between the moving contact and the static contact finger of the circuit breaker, and in order to protect the main contact, an arc contact is generally arranged on the main contact to bear the strong electric arc when the circuit is disconnected.
The arc contact is integrally cylindrical, the front end of the arc contact is made of ablation-resistant copper-tungsten alloy, the rear end of the arc contact is made of common pure copper material, a plurality of axially extending splitting grooves are circumferentially arranged at the front end of the arc contact and are divided into a plurality of petal-shaped contact fingers, and the rear end of the arc contact is provided with connecting threads and is fixedly connected with the main contact through the connecting threads.
The arc contact assembly is the core assembly of a circuit breaker product, the screwing torque is required to reach 280 N.M for the screw thread fastening assembly of the arc contact, the connecting screw thread on the arc contact needs to be in close contact with the adapting screw thread on the main contact, if the arc contact is not screwed tightly, the rear end of the arc contact is in screw thread fit with the main contact to form a gap, when the circuit breaker is switched on and switched off, electric arcs are generated between the rear end of the arc contact and the main contact at the screw thread connection part, and the rear end of the arc contact is made of an ablation-resistant common pure copper material and the screw thread fit part of the main contact is also made of an ablation-resistant material, so that the arc contact and the main contact are ablated and damaged, the circuit breaker is switched on and fails, and power supply accidents are caused. Therefore, the quality of the arc contact assembly directly determines the reliability of the circuit breaker product.
For the fastening and assembling of the arc contact, in the prior art, for example, a movable arc contact assembling and disassembling tool disclosed in chinese patent application publication No. CN110323092A, an insertion shaft thereof has an insertion section and a screwing section, the screwing section is matched with a screwing tool to rotate the insertion shaft, the insertion section is fixed with a plurality of clamping plates, a plate surface of each clamping plate extends along a radial direction of the insertion section, a length direction of the plate surface is consistent with an axial direction of the insertion section, when the insertion section is inserted into the movable arc contact, each clamping plate extends into a corresponding split groove to be in blocking fit with a petal-shaped contact finger in a circumferential direction, and the insertion shaft can be driven by the clamping plates to rotate the movable arc contact by the screwing tool, so as to assemble and disassemble the movable arc contact.
And to the fixed of its cardboard, be through setting up a plurality of axially extended mounting grooves on the outer peripheral face of inserting the section, each cardboard interference fit is in the mounting groove, such assembly method operation is more complicated, the cardboard is not good to be installed, furthermore, in the interference fit in-process, the cardboard can receive great effort, often lead to the partial atress deformation of overhanging outside the mounting groove of cardboard easily, and the clearance between the adjacent contact finger of arc contact is less, in case the cardboard takes place to warp, in the dismouting in-process that carries out arc contact, hardly insert the cardboard in the clearance between the adjacent two contact fingers, the dismouting process is very inconvenient.
Disclosure of Invention
The invention aims to provide a wrench head for screwing an arc contact of a circuit breaker, which aims to solve the problems that a clamping plate of the existing arc contact assembling and disassembling tool is not easy to install and use.
The technical scheme of the arc contact screwing wrench head of the circuit breaker is as follows:
a circuit breaker arc contact screwing wrench head comprises a columnar main body, wherein one end of the columnar main body is a screwing end used for being matched with a screwing wrench, the other end of the columnar main body is a mounting end, a plurality of mounting grooves are formed in the outer peripheral surface of the mounting end, clamping plates are mounted in the mounting grooves and used for extending into corresponding split grooves to be in stop fit with petal-shaped contact fingers of arc contacts in the circumferential direction when the mounting end is inserted into the arc contacts, the clamping plates are in clearance fit with the mounting grooves, the mounting end comprises a large-diameter section and a small-diameter section, the large-diameter section of the small-diameter section is far away from the screwing end, the mounting groove is provided with a large groove section located on the large-diameter section and a small groove section located on the small-diameter section, the small groove section penetrates through the end surface of the mounting end, a baffle is fixed on the end surface of the mounting end and forms a stop for one end, close to the mounting end, of the baffle is a side wall of the large groove section, far away from the small groove section is a stop side wall, and is used for forming a stop for one end, close to the screwing end, of the clamping plates, close to the screwing end, the baffle is matched with the side wall of the stop to axially limit the clamping plate, and the mounting end is also provided with a radial limiting structure for radially limiting the clamping plate.
Has the advantages that: the clamping plate is in clearance fit with the mounting groove, the clamping plate can be conveniently inserted into the mounting groove when being mounted, meanwhile, the large-diameter section and the small-diameter section are arranged, the large-diameter section can be utilized to enable one side groove wall of the mounting groove to form a stop side wall matched with one end of the clamping plate in a stop mode, the clamping plate can be conveniently inserted in place, the other end of the clamping plate is stopped through the baffle arranged on the end face of the mounting end, axial limiting of the clamping plate is achieved, the clamping plate is fixed in a positioning mode through the axial limiting structure and the radial limiting structure in a matched mode, compared with an existing interference assembly mounting mode, the mounting operation is simple, the situation that the part of the clamping plate extending out of the mounting groove is deformed due to large acting force in the fixing mounting process can be avoided, and normal use is guaranteed.
Furthermore, each mounting groove is radially arranged and is a through groove which is radially communicated.
Has the advantages that: convenient processing, moreover, each of radially arranging leads to the groove, can make full use of installation end's volume itself, simultaneously, one that once processes out leads to the groove and can supply two cardboards to install, is favorable to saving the process.
Furthermore, the mounting end is provided with a central hole, each mounting groove is communicated with the central hole, the inner end of each clamping plate, extending into the central hole, is an abutting end, and the abutting ends of the clamping plates are directly or indirectly abutted.
Has the advantages that: the abutting ends of the clamping plates abut directly or indirectly, so that the inner ends of the clamping plates are stopped and limited, and meanwhile, the clamping plates can interact with each other, and the screwing force can be favorably dispersed to the clamping plates.
Furthermore, the butt joint end of cardboard is the wedge end, and the both sides face of the wedge end of each cardboard respectively with the side butt of the wedge end of adjacent cardboard, the angle that the both sides face of the wedge end of each cardboard becomes the contained angle equals, and the angle sum of the wedge end contained angle of each cardboard is 360.
Has the advantages that: the wedge end angle of each cardboard is unanimous, is convenient for make cardboard technology unanimous, and through setting up the wedge end and make the contained angle sum of each wedge end 360 to make each cardboard butt each other, be favorable to the cardboard atress even.
Furthermore, the clamping plates are provided with limiting sections extending out of the end faces of the mounting ends, limiting grooves are formed in the end faces of the baffle plates, which face the side faces of the mounting ends, the limiting sections extend into the limiting grooves, and the circumferential groove walls of the limiting grooves radially limit the limiting sections of the clamping plates; the mounting end is provided with a baffle ring, the inner peripheral surface of the baffle ring is stepped and is provided with a large hole section and a small hole section, the large hole section is sleeved on the large diameter section and covers the large groove section so as to form radial limit for the part of the clamping plate mounted on the large groove section, and the circumferential groove wall of the baffle plate and the baffle ring form the radial limit structure.
Has the advantages that: the spacing section through baffle circumference cell wall and cardboard forms spacing cooperation, keeps off the macropore section of ring and the part of cardboard installing in the macropore section and forms spacing cooperation, all has radial spacing, spacing reliable, moreover, easy to assemble to the both ends of cardboard promptly.
Furthermore, the large-diameter section and the small-diameter section of the mounting end form a step surface facing the baffle, the step surface is provided with a threaded hole, the small-hole section of the baffle ring is provided with a screw hole extending along the axial direction, and the baffle ring is fixedly connected with the large-diameter section through screws.
Has the advantages that: through step face fixed connection fender ring, can install end axial dimensions and set up the screw hole, have sufficient space that sets up, moreover, through axial fastening connection, be favorable to connecting reliably.
Furthermore, the large-diameter section and the small-diameter section of the mounting end form a step surface facing the baffle, a ring groove with a notch facing the baffle is arranged on the step surface, the part of the clamping plate located in the large-groove section extends to the outer side of the ring groove along the radial direction of the large-diameter section, and the ring groove can enable the petal-shaped contact fingers of the arc contact to extend into the ring groove when the mounting end is inserted into the arc contact.
Has the advantages that: the annular groove is formed in the step surface formed by the large-diameter section and the small-diameter section, so that after the clamping plate is inserted into the mounting groove, the part, located in the large-groove section, of the clamping plate stretches across the inner side wall and the outer side wall of the annular groove, when the petal-shaped contact finger with the movable arc contact of the clamping plate rotates in the circumferential direction, the inner side wall and the outer side wall of the annular groove can be supported on two sides of the blocking part, the stress is uniform, and deformation of the clamping plate is avoided.
Furthermore, the baffle is connected with the mounting end in a fastening mode through screws, the baffle is provided with screw through holes, the small-diameter section of the mounting end is divided into the split structure through the through grooves, the end faces of the petals jointly form the end face of the mounting end, the end faces of the petals are respectively provided with threaded holes, the number of the screw through holes is consistent with that of the petals, and the petals are connected with the baffle in a fastening mode through the screws.
Has the advantages that: the number of the screw through holes is set to be consistent with the number of the petal bodies, and each petal body can be fixedly connected with the baffle through screws, so that each separated petal body is fixed together through the baffle, the connection strength is ensured, the use is reliable, and good limit can be formed on each clamping plate simultaneously.
Further, the clamping plate is made of high-speed steel.
Has the advantages that: the high-speed steel is tool steel, has high hardness and strength, and is favorable for meeting the assembly requirement of large torque.
Furthermore, the overhanging part of one end of the clamping plate close to the end face of the mounting end is provided with a chamfer angle on the outer part of the mounting groove.
Has the advantages that: the sharp degree of the end part of the clamping plate is reduced through the arrangement of the chamfer, and when the arc contact of the circuit breaker is oppositely inserted with the screwing wrench head, the damage to the petal-shaped contact finger caused by scratching is avoided; meanwhile, the hands can be prevented from being scratched in the installation operation.
Drawings
Fig. 1 is a schematic perspective view of an arc contact screw wrench head of a circuit breaker according to the present invention;
FIG. 2 is a vertical cross-sectional view of FIG. 1 at a card location;
FIG. 3 is a vertical cross-sectional view of FIG. 1 at the screw penetration of the baffle plate;
FIG. 4 is a transverse cross-sectional view of FIG. 1 at the small diameter section of the mounting end;
FIG. 5 is a schematic structural view of the body of FIG. 1;
FIG. 6 is a schematic structural diagram of the card board in FIG. 1.
In the figure: 1. pulling and twisting the end; 2. a large diameter section; 21. an annular step surface; 22. a ring groove; 3. a small diameter section; 31. the baffle plate is fixed with the threaded hole; 32. mounting grooves; 4. a baffle ring; 41. punching a baffle ring screw; 5. clamping a plate; 51. a first stage; 52. a second stage; 53. a third stage; 54. a butting end; 6. a baffle plate; 61. punching a baffle plate screw; 7. a central bore; 8. the baffle plate is fixed with a screw.
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, which may be present in the embodiments of the present invention, are 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 recitation of "comprising an … …" may occur without the exclusion of additional like elements present in the process, method, article, or apparatus that comprises the element.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
Example 1 of the circuit breaker arc contact screw wrench head of the present invention:
as shown in fig. 1 to 6, the arc contact twisting wrench head for a circuit breaker includes a cylindrical main body, the main body includes a mounting end and a twisting end 1, the twisting end 1 is hexagonal, the mounting end is fixedly mounted with a plurality of clamping plates 5 and a baffle ring 4 and a baffle 6 for limiting each clamping plate 5. When the mounting end of the arc contact screwing wrench head of the circuit breaker extends into the arc contact, each clamping plate 5 extends into each split groove of the arc contact to be matched with the petal-shaped contact finger of the arc contact in a blocking mode in the circumferential direction, the mounting end is rotated by screwing the wrench screwing end 1, and then the clamping plates 5 drive the arc contact to rotate, so that the arc contact is mounted and dismounted.
The installation end is whole to be step axle construction, including major diameter section 2 and path section 3, and the major diameter section 2 of path section 3 is kept away from and is pulled wrong end 1, and path section 3 is used for inserting in the arc contact when circuit breaker arc contact revolves wrong spanner head and uses. The mounting end is provided with a central hole 7, the central hole 7 is of a blind hole structure and is provided with an orifice positioned on the end face of the mounting end and a hole bottom positioned in the large-diameter section 2.
A plurality of mounting grooves 32 are formed in the outer peripheral surface of the mounting end, and the mounting grooves 32 are used for mounting the clamping plates 5. Each mounting groove 32 is evenly distributed along the circumference of the columnar main body and is distributed in a radial shape, the mounting grooves 32 are through grooves which are communicated in the radial direction, and each mounting groove 32 is communicated with the central hole 7. The mounting groove 32 is an axially extending elongated groove extending axially from the large-diameter section 2 to the end face of the mounting end, the mounting groove 32 has a large groove section located on the large-diameter section 2 and a small groove section located on the small-diameter section 3, the small groove section penetrates through the end face of the mounting end, the large groove section has a side groove wall far away from the small groove section, and the wall surface of the groove is perpendicular to the axis of the mounting end to form a stop side wall for axially limiting the clamping plate 5. In this embodiment, there are six mounting grooves 32, and the six mounting grooves 32 divide the small diameter section 3 into six lobes.
The transition of the big diameter section 2 and the small diameter section 3 of the installation end forms an annular step face 21, an annular groove 22 is arranged on the annular step face 21, the annular groove 22 of the annular groove 22 is coaxial with the small diameter section 3 of the installation end, the wall surface of the inner side wall of the annular groove 22 is aligned with the outer peripheral surface of the small diameter section 3, and the inner wall surface of the annular groove 22 and the outer peripheral surface of the small diameter section 3 are on the same cylindrical surface. The big groove section of mounting groove 32 radially runs through the inside and outside lateral walls of annular groove 22 along big footpath section 2, and the axial length size of the big groove section of mounting groove 32 is greater than the axial depth size of annular groove 22, so that the big groove section of mounting groove 32 not only has the portion of being in the inboard cell wall of annular groove 22 and outside cell wall upper portion, still has the portion of being in the tank bottom of annular groove 22, so that after cardboard 5 inserted mounting groove 32, make cardboard 5 insert in each cell wall of annular groove 22, from forming reliable support to cardboard 5.
The clamping plate 5 is a three-stage step-shaped inserting piece and comprises a first stage 51, a second stage 52 and a third stage 53, wherein the width of the first stage is increased in sequence, one side of the clamping plate 5 in the width direction is in a three-stage step shape, and the other side of the clamping plate 5 is in a linear shape. After the clamping plate 5 is installed in the installation groove 32, the first stage 51, the second stage 52 and the third stage 53 are arranged along the axial direction of the main body, the third stage 53 of the clamping plate 5 is inserted into the large groove section of the installation groove 32, the second stage 52 of the clamping plate 5 is inserted into the small groove section of the installation groove 32, the first stage 51 of the clamping plate 5 extends out of the end face of the installation end, the linear end of the clamping plate 5 in the width direction extends into the central hole 7, and the third stage 53 of the clamping plate 5 penetrates through the annular groove 22 and spans on the inner side wall and the outer side wall of the annular groove 22. The transition between the vertical and the horizontal plane of the second stage 52 of the pallet 5 is provided with a chamfer.
The one end that stretches into centre bore 7 of cardboard 5 is butt end 54, and the butt end 54 of each cardboard 5 butt each other, and the butt end 54 of cardboard 5 is the wedge end, and the side of the wedge end of each cardboard 5 respectively with the side butt of the wedge end of adjacent cardboard 5, the angle sum of the contained angle that becomes of the both sides face of the wedge end of each cardboard 5 is 360. In this embodiment, six clamping plates 5 are provided, and the included angle formed by the two side surfaces of each wedge-shaped end is 60 degrees.
Be fixed with baffle 6 on the terminal surface of installation end, baffle 6 is the tubular construction, and the nozzle has seted up baffle screw perforation 61 towards the installation end terminal surface at the bottom of the section of thick bamboo, and the quantity of baffle screw perforation 61 is unanimous with the quantity of cardboard 5, and in this embodiment, baffle screw perforation 61 has six, and each baffle screw perforation 61 is along the circumference equipartition of baffle 6, and baffle screw perforation 61 is the counter sink. Threaded holes are formed in the end face of the mounting end, the threaded holes are six and are respectively formed in the six petal bodies of the small-diameter section 3, the threaded holes correspond to the baffle plate screw through holes 61, so that the baffle plate 6 is fixed to the mounting end through the baffle plate fixing screws 8, the petal bodies are connected into a whole through the baffle plate 6 and the petal bodies, the strength of the small-diameter section 3 is improved, and the use reliability is guaranteed.
The first stage 51 of cardboard 5 stretches into in the barrel of baffle 6, and the barrel inside wall of baffle 6 forms radially spacingly to the first stage 51 of cardboard 5 of each cardboard 5, and simultaneously, the nozzle of baffle 6 is along the butt carry out the axial spacingly on the vertical face of the second stage 52 of cardboard 5 in order to carry out the cardboard 5. The inner space of the cylindrical structure of the baffle 6 forms a limiting groove, and the first stage 51 of the clamping plate 5 forms a limiting section.
The mounting end is further sleeved with a baffle ring 4, the inner peripheral surface of the baffle ring 4 is stepped, the baffle ring 4 is provided with a large hole section and a small hole section, the large hole section is sleeved on the outer peripheral surface of the large diameter section 2 and covers a part of the large groove section, and radial limiting is formed on a third stage 53 of the clamping plate 5 mounted in the large groove section. Be equipped with on the aperture section of keeping off ring 4 and keep off ring screw perforation 41 along axial extension, keep off ring screw perforation 41 and be the counter bore, and be equipped with two, be equipped with two adaptation screw holes on the annular step face 21, keep off ring 4 and pass through screw fixed connection on big footpath section 2. The inner step of the retainer ring 4 abuts on the annular step surface 21 of the large-diameter section 2 and can axially restrict the third step 53 of the chucking plate 5. A gap is formed between the small hole section of the baffle ring 4 and the outer end of the clamping plate 5 which is suspended outside the mounting groove 32, so that when the arc contact screwing wrench head of the circuit breaker extends into the arc contact, the contact finger of the arc contact can extend into the annular groove 22.
When the clamping plates 5 are installed, the clamping plates 5 are inserted into the installation grooves 32, the abutting ends 54 of the clamping plates 5 abut against each other, so that the limiting is formed on the radial inner side, the baffle 6 and the baffle ring 4 are fixedly connected to the installation ends respectively, the inner side wall of the cylinder body of the baffle 6 and the baffle ring 4 form a radial limiting structure, the limiting is formed on the radial outer side of the clamping plates 5 at the axial two ends of the clamping plates 5, and meanwhile, the axial limiting is formed on the axial two ends of the clamping plates 5 along the cylinder opening of the baffle 6 and the baffle side wall of the large groove section. The inner step surface of the baffle ring 4 can also limit the axial position of the clamping plate 5, so that the plug-in clamping plate 5 can be reliably fixed in the mounting groove 32.
The clamping plate 5 which is inserted and installed is matched with the limiting structure, so that the whole installation operation is simple, the part of the clamping plate 5 which is suspended outside the installation groove 32 can be prevented from being deformed by a large acting force in the process of fixed installation, and the normal use can be ensured; moreover, when the breaker arc contact screwing wrench head is used, when the clamping plate 5 extends into the space between the arc contact petal-shaped contact fingers, the petal-shaped contact fingers of the arc contact can extend into the annular groove 22, and the third stage 53 of the clamping plate 5 stretches across the inner side wall and the outer side wall of the annular groove 22, so that when screwing torque is applied, the inner side wall and the outer side wall of the annular groove 22 can support the clamping plate 5 on the two sides of the arc contact petal-shaped contact fingers, the load bearing performance of the clamping plate 5 can be improved, and the deformation of the clamping plate 5 is avoided.
Through the design and the use of high strength inserted sheet formula spanner head, realize the assembly of big moment, solved product assembly space narrow and small, problem such as moment requirement height can guarantee the steady operation of product, eliminates the potential safety hazard, guarantees the quality of assembly, stops the emergence of waste product, provides technical support for the reliable operation of electric wire netting.
Example 2 of the circuit breaker arc contact screw wrench head of the present invention:
the difference between the present embodiment and embodiment 1 is that the mounting end in embodiment 1 has a central hole, and each mounting groove is communicated with the central hole and is a radial through groove. In the embodiment, the mounting end is not internally provided with a central hole, the mounting groove is not a through groove which is radially communicated, the mounting groove is provided with a groove bottom which radially faces outwards, and the abutting end of each clamping plate abuts against the groove wall of the mounting groove.
Example 3 of the circuit breaker arc contact screw wrench head of the present invention:
the difference between the present embodiment and embodiment 1 is that the mounting end in embodiment 1 has a central hole, each mounting groove is communicated with the central hole, and the abutting end of each clamping plate extends into the central hole to abut directly. In this embodiment, the abutting column is inserted into the central hole, the abutting groove is formed in the abutting column, each clamping plate extends into the central hole and abuts against the abutting groove, and the clamping plates are abutted through the abutting columns.
Example 4 of the circuit breaker arc contact screw wrench head of the present invention:
the present embodiment is different from embodiment 1 in that the abutting end of the card board in embodiment 1 is a wedge-shaped end and a triangular tip. In this embodiment, the abutting ends of the snap-gauge plates are trapezoidal, the end faces of the abutting ends of the snap-gauge plates are flat, and the snap-gauge plates are connected with each other through two waists of the trapezoidal abutting ends.
Example 5 of the circuit breaker arc contact screw wrench head of the present invention:
the present embodiment is different from embodiment 1 in that the circumferential groove wall of the baffle plate and the baffle ring in embodiment 1 form a radial limiting structure for both axial end portions of the snap-gauge plate. In this embodiment, the baffle does not limit the clamping plate, only the retaining ring is used for limiting, and the retaining ring forms a radial limiting structure. In other embodiments, the limiting can be performed only by the baffle, and the sleeve can be arranged and sleeved on the periphery of the clamping plate in a tight fit manner with the second step section of the clamping plate to form radial limiting.
Example 6 of the circuit breaker arc contact screw wrench head of the present invention:
the difference between this embodiment and embodiment 1 is that the retainer ring in embodiment 1 is provided with an axially extending screw through hole, and the retainer ring is fixed on the annular step surface of the mounting end. In this embodiment, the large hole section of the baffle ring is provided with a screw through hole extending in the radial direction, the outer peripheral surface of the large diameter section of the mounting end is provided with a screw hole, and the baffle ring is fixed on the outer peripheral surface of the large diameter section through a screw.
Example 7 of the circuit breaker arc contact screw wrench head in the present invention:
this embodiment is different from embodiment 1 in that the number of screw holes formed in the shutter and the number of the snap-in plates in embodiment 1 are six. In the embodiment, the number of the screw through holes in the baffle is two, and the number of the clamping plates is four. The number of the screw through holes on the baffle is different from that of the clamping plates.
Example 8 of the circuit breaker arc contact screw wrench head of the present invention:
this example differs from example 1 in that the chucking plate in example 1 is made of high-speed steel. In this embodiment, the chuck plate is made of carburized steel. In other embodiments, the catch plate may be made of other materials with high hardness.
Example 9 of circuit breaker arc contact screw wrench head in the invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, there are six clamping plates, and the included angle formed by the two side surfaces of the wedge-shaped end of each clamping plate is 60 degrees, whereas in this embodiment, there are four clamping plates, and the included angle formed by the two side surfaces of the wedge-shaped end of each clamping plate is 90 degrees. In other embodiments, the clamping plates can be arranged into two, three, eight and other numbers according to the use requirement.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments without inventive effort, or some technical features of the present invention may be substituted with equivalents. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The circuit breaker arc contact screwing wrench head comprises a columnar main body, wherein one end of the columnar main body is a screwing end used for being matched with the screwing wrench, the other end of the columnar main body is a mounting end, a plurality of mounting grooves are formed in the peripheral surface of the mounting end, clamping plates are mounted in the mounting grooves, and the clamping plates are used for extending into corresponding splitting grooves to be matched with the petal-shaped contact fingers of the arc contacts in a blocking mode in the circumferential direction when the mounting end is inserted into the arc contacts; the clamping plate is in clearance fit with the mounting groove, the mounting end comprises a large-diameter section and a small-diameter section, the large-diameter section of the small-diameter section is far away from the screwing end, the mounting groove is provided with a large groove section located on the large-diameter section and a small groove section located on the small-diameter section, the small groove section penetrates through the end face of the mounting end, a baffle is fixed on the end face of the mounting end, the baffle forms a stop for one end, close to the end face of the mounting end, of the clamping plate, one side wall, far away from the small groove section, of the large groove section is a stop side wall, the stop side wall is used for forming a stop for one end, close to the screwing end, of the clamping plate, the baffle is matched with the stop side wall to axially limit the clamping plate, and a radial limiting structure for radially limiting the clamping plate is further arranged on the mounting end.
2. The circuit breaker arcing contact wrench head as recited in claim 1, wherein the mounting slots are radially disposed and are through slots extending radially therethrough.
3. The circuit breaker arc contact wrench head as claimed in claim 2, wherein the mounting end has a central opening, each mounting slot communicates with the central opening, the inner ends of the clamping plates extending into the central opening are abutting ends, and the abutting ends of the clamping plates abut directly or indirectly.
4. The circuit breaker arcing contact wrench head as claimed in claim 3, wherein the abutting ends of the clamping plates are wedge-shaped ends, the two side faces of the wedge-shaped end of each clamping plate abut against the side faces of the wedge-shaped end of the adjacent clamping plate respectively, the included angles formed by the two side faces of the wedge-shaped end of each clamping plate are equal, and the sum of the included angles of the wedge-shaped ends of each clamping plate is 360 °.
5. The circuit breaker arc contact screwing wrench head according to any one of claims 1-4, wherein the clamping plates have a limiting section extending from the end surface of the mounting end, a limiting groove is provided on the end surface of the baffle plate facing the mounting end, the limiting section extends into the limiting groove, and the circumferential groove wall of the limiting groove forms a radial limit for the limiting section of each clamping plate; the mounting end is provided with a baffle ring, the inner peripheral surface of the baffle ring is stepped and is provided with a large hole section and a small hole section, the large hole section is sleeved on the large diameter section and covers the large groove section so as to form radial limit for the part of the clamping plate mounted on the large groove section, and the circumferential groove wall of the baffle plate and the baffle ring form the radial limit structure.
6. The circuit breaker arc contact screwing wrench head as claimed in claim 5, wherein the large diameter section and the small diameter section of the mounting end form a step surface facing the baffle, the step surface is provided with a threaded hole, the small hole section of the retainer ring is provided with a screw through hole extending along the axial direction, and the retainer ring is fixedly connected with the large diameter section through a screw.
7. The arc contact screwing wrench head of the circuit breaker according to any one of claims 1-4, wherein the large diameter section and the small diameter section of the mounting end form a step surface facing the baffle, the step surface is provided with a ring groove with a notch facing the baffle, the part of the clamping plate located in the large groove section extends outwards along the radial direction of the large diameter section to the outer side of the ring groove, and the ring groove can enable the petal-shaped contact fingers of the arc contact to extend into the ring groove when the mounting end is inserted into the arc contact.
8. The arc contact screwing wrench head of a circuit breaker according to any one of claims 2-4, wherein the baffle is tightly connected with the mounting end through screws, the baffle is provided with screw through holes, the small-diameter section of the mounting end is divided into split structures by the through grooves, the end surfaces of the petals jointly form the end surface of the mounting end, the end surfaces of the petals are respectively provided with threaded holes, the number of the screw through holes is equal to that of the petals, and the petals are tightly connected with the baffle through screws.
9. The circuit breaker arcing contact wrench head of any one of claims 1-4, wherein the clamping plate is made of steel.
10. The wrench head of any one of claims 1-4, wherein the end of the locking plate near the end surface of the mounting end is provided with a chamfer on the portion of the locking plate overhanging the mounting slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111525022.6A CN114400170B (en) | 2021-12-14 | 2021-12-14 | Arc contact screwing spanner head of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111525022.6A CN114400170B (en) | 2021-12-14 | 2021-12-14 | Arc contact screwing spanner head of circuit breaker |
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| Publication Number | Publication Date |
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| CN114400170A true CN114400170A (en) | 2022-04-26 |
| CN114400170B CN114400170B (en) | 2024-03-22 |
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| CN202111525022.6A Active CN114400170B (en) | 2021-12-14 | 2021-12-14 | Arc contact screwing spanner head of circuit breaker |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114400170B (en) | 2024-03-22 |
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