Wedge connector assembly with sequential shear bolts
11404818 · 2022-08-02
Assignee
Inventors
Cpc classification
International classification
Abstract
An electrical connector assembly, including a bolt having a tapered distal end; a wedge having a top surface and a bottom surface defining a first aperture extending between and through the top and bottom surfaces, and dimensioned to receive the bolt therethrough; a shell having a top surface, a bottom surface, a first end, and a second end, the shell further defining a first and a second channels, the channels being separated by a middle portion and to receive the wedge therebetween; the shell further having a second aperture extending between the top surface to the bottom surface of the shell and dimensioned to receive the bolt therethrough, wherein the second aperture is configured to be positioned to align and pair with the first aperture when the wedge is positioned between the first and second channels.
Claims
1. An electrical connector assembly, comprising: at least one bolt having a tapered distal end; a wedge having a top surface and a bottom surface defining a plurality of apertures extending between and through the top and bottom surfaces, and dimensioned to receive the bolt therethrough; a shell having a top surface, a bottom surface, a first end, and a second end, the shell further defining a first channel and a second channel extending from the first end to the second end of the shell, the first and second channels being separated by a middle portion such that the first and second channels are spaced to receive the wedge therebetween; and a first opening and a second opening extending between the top surface to the bottom surface of the shell and the openings are each dimensioned to receive the bolt therethrough, wherein the openings are configured to be positioned to align and pair with the plurality of apertures when the wedge is positioned between the first and second channels wherein the first opening comprises a first shape and a first size and the second opening comprises a second shape and a second size wherein the first size and first shape are different from the second shape and the second size, respectively.
2. The assembly of claim 1, wherein the shell has a width that tapers from the first end to the second end of the shell.
3. The assembly of claim 1, wherein the first and second channels extend from the first end to the second end of the shell parallel to a plane defined by the top surface.
4. The assembly of claim 1, wherein the at least one bolt is a shear bolt.
5. The assembly of claim 1, wherein the at least one bolt has a threaded portion.
6. The assembly of claim 5, wherein each of the plurality of apertures has a threading that corresponds to the threaded portion of the at least one bolt.
7. The assembly of claim 1, wherein the wedge has three apertures and the shell has three corresponding openings, wherein each of the three wedge apertures is configured to be positioned to align and pair with a respective shell aperture when the wedge is positioned between the first and second channels.
8. The assembly of claim 1, wherein the at least one bolt includes an installation washer positioned therearound.
9. The assembly of claim 1, wherein the at least one bolt is positioned at an angle to the top surfaces of the wedge and the shell when the at least one bolt is positioned through each of the first opening and the second opening.
10. The assembly of claim 9, wherein the at least one bolt is perpendicularly positioned to the top surfaces of the wedge and the shell when the at least one bolt is positioned through each of the first opening and the second opening.
11. The assembly of claim 1, wherein the at least one bolt is configured to move the wedge toward the second end of the shell when the at least one bolt is inserted through the first opening and the second opening.
12. The assembly of claim 1, wherein the wedge further comprises a first side surface having a first groove configured to receive a portion of a first conductor and hold the first conductor via friction fit within the first channel.
13. An electrical connector assembly, comprising: a first bolt having a tapered end; a second bolt having a tapered end; a wedge having a top surface and a bottom surface and defining a first aperture and a second aperture extending between and through the top and bottom surfaces, the first aperture is dimensioned to receive the first bolt therethrough and the second aperture is dimensioned to receive the second bolt therethrough; a shell having a top surface, a bottom surface, a first end, and a second end, the shell further defining a first and a second channel extending from the first end to the second end of the shell, the first and second channel being separated by a middle portion such that the first and second channel are spaced to receive the wedge therebetween; the shell further having a first opening and a second opening extending between the top surface to the bottom surface of the shell, the first opening is dimensioned to receive the first bolt therethrough and the second opening is dimensioned to receive the second bolt therethrough, wherein the first and second openings are configured to be positioned to align and pair with the first aperture and the second aperture respectively when the wedge is positioned between the first and second channels and wherein the first opening comprises a first shape and a first size, the second opening comprises a second shape and a second size, wherein the first size and first shape are different from at least one of the second shape and the second size, respectively.
14. The assembly of claim 13, wherein the shell has a width that tapers from the first end to the second end of the shell.
15. The assembly of claim 13, wherein the first and second channels extend from the first end to the second end of the shell parallel to a plane defined by the top surface.
16. A assembly of claim 13, wherein the first opening is larger than the second opening.
17. The assembly of claim 13, wherein the first and second bolts are shear bolts.
18. A assembly of claim 13, wherein the first and second bolts have a threaded portion.
19. A assembly of claim 18, wherein the first and second apertures have a threading that corresponds to the respective threaded portions of the first and second bolts.
20. The assembly of claim 13, wherein at least one of the first bolt and the second bolt includes an installation washer positioned therearound.
21. The assembly of claim 13, wherein each of the first bolt and the second bolt is positioned at an angle to the top surfaces of the wedge and the shell when each of the first bolt and the second bolt is positioned through the first aperture and first opening and through the second aperture and second opening, respectively.
22. The assembly of claim 21, wherein each of the first bolt and the second bolt is perpendicularly positioned to the top surfaces of the wedge and the shell when each of the first bolt and the second bolt is positioned through the first aperture and first opening and through the second aperture and second opening, respectively.
23. The assembly of claim 21, wherein each of the first bolt and the second bolt is configured to move the wedge toward the second end of the shell when the first bolt is inserted through the first aperture and into the first opening, and the second bolt is inserted through the second aperture and into the second opening.
24. The assembly of claim 13, wherein the wedge further comprises a first side surface having a first groove configured to receive a portion of a first conductor and hold the first conductor via friction fit within the first channel when the wedge is assembled with the shell.
Description
BRIEF DESCRIPTION OF FIGURES
(1) Embodiments of the present invention will be more fully understood and appreciated by reading the following Detailed Description in conjunction with the accompanying drawings, in which:
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(24)
(25)
(26)
(27)
(28)
(29)
(30)
(31)
(32)
(33)
(34)
(35)
(36)
(37)
(38)
(39)
DESCRIPTION
(40) Aspects of the present invention and certain features, advantages, and details thereof, are explained more fully below with reference to the non-limiting examples illustrated in the accompanying drawings. Descriptions of well-known structures are omitted so as not to unnecessarily obscure the invention in detail. It should be understood, however, that the detailed description and the specific non-limiting examples, while indicating aspects of the invention, are given by way of illustration only, and are not by way of limitation. Various substitutions, modifications, additions, and/or arrangements, within the spirit and/or scope of the underlying inventive concepts will be apparent to those skilled in the art from this disclosure.
(41) Referring now to
(42) Referring now to
(43) In one example, shell 12 defines at least one aperture or opening 126 through the top surface 120 to the bottom surface 121. In another example the opening 126 can also be formed through the top surface 120 and not extend all the way through the bottom surface 121. In the example shown, the shell 12 defines three collinear openings 126 positioned near the center of the middle portion 123. Alternatively, the openings 126 can be positioned off colinear and off center, include two rows of colinear off center openings 126, or non-colinear openings 126 (e.g., zig zag design)). Each aperture 126 is configured and dimensioned to accept a shear bolt 16. The openings 126 can be any shape such as but not limited to oblong shaped or circular, and can collectively be the same shape or can be different shapes.
(44) In another example, the first opening 126 positioned closest to the second end 125 can be longer and larger than the sequential openings 126 that are positioned further from the second end 125. In an example with three opening, the opening closest to the second end 125 (the first opening) can be the largest, and middle opening (the second opening) can be smaller than the first opening but larger than the opening closest to the first end 124 (the third opening). While the example described has three openings 126, shell 12 can define any number of openings 126 and can be any relation of sizes including the same or different. It can be useful for the first opening to be larger than the next openings as it allows the bolts to be driven down in a position closer to the first end 124 of the shell 12, as the next shear bolt 16 is driven down the conical tip 164 can slide into the edge of the second opening closest to the first end 124 of the shell 12 moving the wedge 14 and the first shear bolt toward the second end of the shell 12 as the second bolt 16 is driven down. This process is repeated for every subsequent bolt 16. According to another embodiment, apertures 126 can have threads that correspond to threads on shear bolts 16.
(45) Referring now to
(46) The middle portion 143 defines at least one aperture 146 going through the top surface 140 and bottom surface 141. The apertures can each be shaped and sized to accept a shear bolt 16 and strategically positioned to aid in the thrusting of the wedge 14 tighter into the shell 12. The number and positioning of apertures 146 on the wedge 14 can correspond to the number and positioning of openings 126 on the shell 12. In one example, the apertures 146 are equally sized collinear apertures 146, however the apertures 146 can also be of different sizes and not linear.
(47) According to another embodiment, apertures 146 can also have threads that correspond to threads on shear bolts 16. The middle portion 143 of the wedge 14 can run between the first end 144 to the second end 145 of the wedge 14 and in one example can be thicker from the top surface 140 to the bottom surface 141 than the rest of the wedge 14. The middle portion 143 should be thick enough to provide enough threading for the shear bolt 16 while also allowing the shear bolts 16 to bare against wedge 14. The middle portion 143 should also be thin enough to allow the tip of the shear bolt 16 to be recessed to the edge of the shell 12 for the insertion process (as should be understood by a person of ordinary skill in the art in conjunction with a review of this disclosure).
(48) Shear bolts 16 are configured to perform multiple tasks. Referring now to
(49) The conical tip 164 provides for the thrusting of the wedge 14 further into the shell 12 between the conductors when the shear bolt 16 is being inserted. The threaded portion 163 of the shear bolt 16 allows for the driving action of the shear bolt 16 like a normal bolt 16 or screw. The conical tip 164 of the shear bolt 16 can be configured to provide a ramp effect for the thrusting action of the wedge 14. When the shear bolt 16 is inserted further into the wedge 14, the conical tip 164 forces the wedge 14 further into the shell 12 toward the second end 125 of the shell 12 and tighter against the conductors. The apertures 146 in the shell 12 are dimensioned and positioned to receive the shear bolts in a way that forces a thrusting action of the wedge 14 further into the shell 12 against the conductors to be joined when the shear bolts are installed in the correct order.
(50) If a particular assembly requires less thrust distance, a lower number of shear bolts 16 may provide sufficient thrust distance. A larger conductor 10 combination may require a higher number of shear bolts 16. Also, a different diameter of shear bolts 16 may be used for different assemblies. The number of shear bolts 16 and corresponding apertures 146 of a particular connector assembly 10 can be used to complete an assembly. In one example, each connector assembly 10 assembly comes with an amount of shear bolts 16 matching to the number of apertures 146 and openings 126. In another embodiment, a shear bolt 16 that fits multiple different assemblies can be used such that the same or similar type of shear bolts 16 could be used in different models. This would allow a user to have extra or replacement shear bolts 16. This would be an advantage for a user in situations where one is dropped or broken.
(51) Referring now to
(52) Each sheer bolt 16 can be designed to be used one time as the breaking point 161 separates the first head 160 from the second head 162 during installation. In some but not all embodiment, each sheer bolt 161 can be configured to break at a different torque/force.
(53) The shell 12 and wedge 14 can be made of any conductive material suitable in the art such as but not limited to aluminum alloy. These components are preferably conductive by nature, as the wedge 14 conductor provides a mechanical connection between conductors, as well as a path for electrical current flow. In one example, where both conductors are copper, the wedge 14 can be made from compatible alloys and materials such as copper or brass. This is to prevent undesirable electrolysis which can degrade the quality of the connection over time. A user can also use connecter 10 with an oxide inhibitor paste being applied to conductor contacting surfaces and a lubricating grease applied to the conical tip 164 of the shear bolts 16.
(54) Referring now to
(55) Referring now to
(56) Referring now to
(57) The user can then use a socket or tool to drive the first shear bolt 16 into the first aperture 146 in the wedge 14. If there is an installation washer 18, the socket or tool can bear against the portion of the shear bolt 16 to only the portion of the shear bolt 16 above the installation washer 18. By driving the first shear bolt 16 down into the wedge 14, the conical tip 164 of the first shear bolt 16 can be forced into the corresponding opening 126 in the shell 12. The conical tip 164 of the shear bolt 16 can be configured to slide into opening 126, moving the wedge 14 over toward the second end 125 of the shell 12 slightly with each bolt 16 that can be driven down. The user can continue driving the shear bolt 16 into the wedge 14 until final torque has been reached. The shear bolt 16 can preferably only be driven in as far as the top of the rise in the middle portion 143 of the wedge 14. When this point has been reached, and sufficient torque has been applied, the breaking point 161 can separate, and the second head 162 the installation washer 18 can fall away.
(58) The user can then proceed to do the same thing to the remaining shear bolts 16 in sequential order from closest to the second end 145 of the wedge 14 to farthest from the second end 145 of the wedge 14. Driving the shear bolts 16 in sequential order allows each subsequent shear bolt 16 to align with its respective opening 126. Each successive shear bolt 16 can be aligned enough for the conical tip 164 to start into its respective opening 126 without the need for further tapping of the wedge 14. Once the final shear bolt 16 has been fully installed to final torque, the installation is complete.
(59) The connector assembly 10 can be any suitable size and can be made to accept various diameters of conductors, the shell 12 can be in appropriate sizes to be compatible with the conductors needing to be connected. However, depending on the size of conductors needing to be joined, the size of the connector assembly 10 can be different to make a more optimally sized assembly. The height of the connector assembly 10 can be greatest before the shear bolts 16 have been fully installed as the shear bolts 16 have not separated at the breaking point 161. In one example, the height can be 4⅜″ and another ¾″ for the thickness of the shell 12. The connector assembly 10 can be reduced considerably with the elimination of unneeded materials. For example, the 9.71″ shown in
(60) If a connector assembly 10 selected for the conductors to be joined is too large, the final shear bolt 16 may not provide a tight connection. If the conductors can't fit tightly between the wedge 14 and the shell 12, it may be apparent that another size connector assembly 10 may need to be selected to match the conductor sizes. If a connector assembly 10 assembly selected for the conductors to be joined is too small, it most likely will not be possible to start driving the first shear bolt 16.
(61) Referring now to
(62) Hot-sticking and rubber gloving are two work practices used to work on energized high voltage power lines. Hot-sticking uses the concept of the user maintaining a safe distance from energized objects. This is done by using electrically insulating poles/tools to allow work on the energized objects from a remote location. The connector assembly 10 can be compatible with this work practice, as readily available tools and techniques already in use with hot-sticking methods can be used in connector assembly 10 installation and removal. The tools required for hot sticking usually include two shotguns, and a socket stick/hammer drill or a hot hammer.
(63) Rubber gloving uses the concept of shielding the user from energized objects and working at a closer distance. This is done by the user using electrically insulating gloves/sleeves/cover to allow work on the energized objects at a close distance. The connector assembly 10 can be compatible with this work practice, as readily available tools and techniques already in use with rubber gloving methods can be used in connector assembly 10 installation and removal. The tools required for rubber gloving include a hammer and a ratchet/hammer drill. A user can also tap the wedge 14 in with the butt of the gun. When the high voltage lines are not energized, the connector assembly 10 can also be installed and removed using readily available conventional tools.
(64) Removal of connector assembly 10 can be simple and easy. To remove connector assembly 10, a user can remove the shear bolts 16 using a socket or similar tool, and then remove the wedge 14 from the shell 12 and the shell 12 from the conductors.
(65) In another embodiment the shear bolt 16 orientation, shape, and overall function can be different. For example, the shear bolt 16 can be aligned as shown in
(66) The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprise” (and any form of comprise, such as “comprises” and “comprising”), “have” (and any form of have, such as, “has” and “having”), “include” (and any form of include, such as “includes” and “including”), and “contain” (any form of contain, such as “contains” and “containing”) are open-ended linking verbs. As a result, a method or device that “comprises”, “has”, “includes” or “contains” one or more steps or elements. Likewise, a step of method or an element of a device that “comprises”, “has”, “includes” or “contains” one or more features possesses those one or more features, but is not limited to possessing only those one or more features. Furthermore, a device or structure that is configured in a certain way is configured in at least that way, but may also be configured in ways that are not listed.
(67) The corresponding structures, materials, acts and equivalents of all means or step plus function elements in the claims below, if any, are intended to include any structure, material or act for performing the function in combination with other claimed elements as specifically claimed. The description of the present invention has been presented for purposes of illustration and description but is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the invention. The embodiment was chosen and described in order to best explain the principles of one or more aspects of the invention and the practical application, and to enable others of ordinary skill in the art to understand one or more aspects of the present invention for various embodiments with various modifications as are suited to the particular use contemplated.