Double-lug fitting

Abstract

The utility model provides a double-lug fitting, which comprises a U-shaped hanging ring, a bolt, a first nut, an elastic jacking piece and a second nut, and is characterized in that the U-shaped hanging ring is provided with two lug plates, the two lug plates are provided with lug holes in a penetrating manner, and the two lug holes are oppositely arranged; the bolt is arranged in the two lug holes in a penetrating mode. The first nut is in threaded connection with the tail part of the bolt and is used for abutting against the outer side wall of the lug plate far away from the head part of the bolt; the elastic jacking piece is arranged on the periphery of the bolt in a sliding and sleeving mode and located on the outer side of the first nut. And the second nut is in threaded connection with the tail part of the bolt and is used for rotationally pushing the elastic jacking piece to elastically abut against the outer end surface of the first nut. According to the double-lug fitting provided by the utility model, the nut can be stably connected to the bolt, and the connection stability of the double-lug fitting is ensured.

Description

Binaural goldware Technical Field

[0001] This utility model belongs to the field of double-ear fittings technology, and more specifically, relates to a double-ear fitting. Background Technology

[0002] Insulators are devices installed between conductors at different potentials or between a conductor and a ground potential component. They play an important role in overhead transmission lines. Fittings refer to the metal fittings used at both ends of an insulator. Fittings are classified into single-ear fittings and double-ear fittings, with double-ear fittings being more commonly used.

[0003] Most existing double-ear fittings are U-shaped and are typically used to connect with single-ear fittings. The double-ear fitting has ear holes on both ear plates. Bolts are inserted through the two ear holes and the single-ear fitting, and nuts are screwed on the tail end of the bolts to fix the single-ear fitting between the two ear plates. However, during long-term use, the power transmission line is affected by wind, which can cause the double-ear fitting to vibrate, loosen the nuts, and affect the stability of the double-ear fitting connection. Summary of the Invention

[0004] This utility model provides a double-ear fitting that enables a nut to be stably connected to a bolt, ensuring the stability of the double-ear fitting connection.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A double-ear fitting is provided, comprising a U-shaped hanging ring, a bolt, a first nut, an elastic tightening member, and a second nut. The U-shaped hanging ring has two ear plates, each with a through-hole, and the two ear holes are arranged opposite to each other. The bolt passes through the two ear holes. The first nut is threadedly connected to the tail of the bolt and is used to abut against the outer wall of the ear plate away from the bolt head. The elastic tightening member is slidably sleeved on the outer circumference of the bolt and located outside the first nut. The second nut is threadedly connected to the tail of the bolt and is used to rotate and push the elastic tightening member to elastically abut against the outer end face of the first nut.

[0006] In one possible implementation, the elastic clamping member includes a first sleeve, a second sleeve, and an elastic element. The first sleeve is slidably sleeved on the outer periphery of the bolt; the second sleeve is slidably sleeved on the outer periphery of the first sleeve; the elastic element is disposed inside the first sleeve and extends axially into the second sleeve, with both ends of the elastic element connected to the first sleeve and the second sleeve, respectively; wherein, the end of the first sleeve near the first nut is used for abutting and engaging with the first nut, and the end of the second sleeve near the second nut is used for abutting and engaging with the second nut.

[0007] In some embodiments, the first sleeve has a first abutment platform that converges toward the central axis at one end near the first nut, and the second sleeve has a second abutment platform that converges toward the central axis at one end near the second nut. The two ends of the elastic member are respectively connected to the first abutment platform and the second abutment platform.

[0008] In some embodiments, a first sealing gasket for abutting and engaging with a first nut is embedded on the outer end face of the first abutment platform, and a second sealing gasket for abutting and engaging with a second nut is embedded on the outer end face of the second abutment platform.

[0009] In some embodiments, a sealing ring is provided between the first sleeve and the second sleeve.

[0010] In some embodiments, a limiting platform protruding outward is provided on the outer peripheral wall of the first sleeve. The limiting platform is used to abut against the end face of the second sleeve near the first nut to limit the axial displacement of the second sleeve.

[0011] In some embodiments, the sealing ring is embedded on the end face of the limiting platform near the second sleeve for abutting and engaging with the second sleeve.

[0012] In some embodiments, the bolt is surrounded by PTFE tape.

[0013] In some embodiments, an axially extending force-applying block is provided on the outer peripheral wall of the second sleeve.

[0014] In some embodiments, several force-applying blocks are spaced apart circumferentially on the second sleeve.

[0015] Compared with the prior art, the double-ear fitting provided in this embodiment avoids the loosening of the first and second nuts due to the vibration of the double-ear fitting, under the elastic tightening of the elastic clamping member on the first and second nuts, so that the first and second nuts are stably connected to the bolt, ensuring the stability of the double-ear fitting connection. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 is a structural schematic diagram of the double-ear fitting provided in an embodiment of this utility model;

[0018] Figure 2 is a front sectional view of the double-ear fitting provided in an embodiment of the present utility model;

[0019] Figure 3 is a partially enlarged structural schematic diagram of point I in Figure 2 of the embodiment of this utility model;

[0020] Figure 4 is a front sectional view of the U-shaped hanging ring in Figure 2 of this utility model embodiment.

[0021] The following are the labeling elements in the figure:

[0022] 10. U-shaped hanging ring; 11. Ear plate; 12. Ear hole; 20. Bolt; 30. First nut; 40. Elastic clamping element; 41. First sleeve; 411. First abutment platform; 412. First sealing gasket; 413. Limiting platform; 42. Second sleeve; 421. Second abutment platform; 422. Second sealing gasket; 43. Elastic element; 50. Second nut; 60. Sealing ring; 70. Force-applying block. Detailed Implementation

[0023] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a number" means two or more, unless otherwise explicitly specified.

[0025] Please refer to Figures 1 to 4 for a description of the double-ear fitting provided by this utility model. The double-ear fitting includes a U-shaped hanging ring 10, a bolt 20, a first nut 30, an elastic tightening member 40, and a second nut 50. The U-shaped hanging ring 10 has two ear plates 11, each with a through-hole 12, which are arranged opposite to each other. The bolt 20 passes through the two ear holes 12. The first nut 30 is threaded to the tail of the bolt 20 and abuts against the outer wall of the ear plate 11 away from the head of the bolt 20. The elastic tightening member 40 is slidably sleeved on the outer periphery of the bolt 20 and located outside the first nut 30. The second nut 50 is threaded to the tail of the bolt 20 and is used to rotate and push the elastic tightening member 40 to elastically abut against the outer end face of the first nut 30.

[0026] This application provides a double-ear fitting. In actual use, a single earring is first placed between two ear plates 11, and a bolt 20 is inserted into the two ear holes 12 and the hole of the single earring. The first nut 30 is screwed onto the tail of the bolt 20 and rotated to abut against the outer wall of the ear plate 11 away from the head of the bolt 20. An elastic clamping member 40 is installed onto the tail of the bolt 20. Finally, a second nut 50 is installed onto the tail of the bolt 20, so that the second nut 50 rotates and pushes the elastic clamping member 40 to elastically abut against the outer end face of the first nut 30. Under the elastic clamping of the elastic clamping member 40 against the first nut 30 and the second nut 50, the loosening of the first nut 30 and the second nut 50 due to the vibration of the double-ear fitting is avoided, so that the first nut 30 and the second nut 50 are stably connected to the bolt 20, ensuring the stability of the double-ear fitting connection.

[0027] Compared with the prior art, the double-ear fitting provided in this embodiment, under the elastic tightening of the elastic clamping member 40 on the first nut 30 and the second nut 50, avoids the loosening of the first nut 30 and the second nut 50 caused by the vibration of the double-ear fitting, so that the first nut 30 and the second nut 50 are stably connected to the bolt 20, ensuring the stability of the double-ear fitting connection.

[0028] In one possible implementation, the elastic clamping member 40 adopts the structure shown in Figures 1 to 3. Referring to Figures 1 to 3, the elastic clamping member 40 includes a first sleeve 41, a second sleeve 42, and an elastic member 43. The first sleeve 41 is slidably sleeved on the outer periphery of the bolt 20; the second sleeve 42 is slidably sleeved on the outer periphery of the first sleeve 41; the elastic member 43 is disposed inside the first sleeve 41 and extends axially into the second sleeve 42, with both ends of the elastic member 43 connected to the first sleeve 41 and the second sleeve 42, respectively; wherein, the end of the first sleeve 41 near the first nut 30 is used to abut against the first nut 30, and the end of the second sleeve 42 near the second nut 50 is used to abut against the second nut 50.

[0029] Specifically, under the elastic pushing force of the elastic element 43 on the first nut 30 and the second nut 50, the loosening of the first nut 30 and the second nut 50 caused by the vibration of the double-ear hardware is avoided; at the same time, the first sleeve 41 and the second sleeve 42 protect the elastic element 43, avoid external corrosion, and increase the service life of the elastic element 43.

[0030] In some embodiments, referring to Figures 1 to 3, the first sleeve 41 is provided with a first abutment platform 411 that converges toward the central axis at one end near the first nut 30, and the second sleeve 42 is provided with a second abutment platform 421 that converges toward the central axis at one end near the second nut 50. The two ends of the elastic member 43 are respectively connected to the first abutment platform 411 and the second abutment platform 421.

[0031] Specifically, the arrangement of the first abutment platform 411 and the second abutment platform 421 facilitates the installation of the elastic element 43 in the first sleeve 41 and the second sleeve 42, thereby improving the ease of installation.

[0032] In some embodiments, referring to Figures 1 to 3, a first sealing gasket 412 for abutting and engaging with the first nut 30 is embedded on the outer end face of the first abutting platform 411, and a second sealing gasket 422 for abutting and engaging with the second nut 50 is embedded on the outer end face of the second abutting platform 421.

[0033] Specifically, by setting the first sealing gasket 412 and the second sealing gasket 422, the airtightness between the elastic clamping member 40 and the first nut 30 and the second nut 50 can be effectively guaranteed, preventing the infiltration of external impurities or moisture.

[0034] In some embodiments, referring to Figures 1 to 3, a sealing ring 60 is provided between the first sleeve 41 and the second sleeve 42.

[0035] Specifically, the sealing ring 60 not only ensures the airtightness between the first sleeve 41 and the second sleeve 42, but also does not affect the relative sliding between the first sleeve 41 and the second sleeve 42. Based on the first sealing gasket 412 and the second sealing gasket 422, it further ensures the airtightness of the elastic clamping member 40 and its position.

[0036] Optionally, the sealing ring 60 is fitted around the outer periphery of the first sleeve 41.

[0037] Optionally, the outer peripheral wall of the first sleeve 41 is provided with a limiting platform 413 protruding outward. The limiting platform 413 is used to abut against the end face of the second sleeve 42 near the first nut 30 to limit the axial displacement of the second sleeve 42. The sealing ring 60 is embedded in the end face of the limiting platform 413 near the second sleeve 42 and is used to abut against the second sleeve 42.

[0038] In some embodiments, referring to Figures 1 to 3, the outer peripheral wall of the first sleeve 41 is provided with a limiting platform 413 protruding outward. The limiting platform 413 is used to abut against the end face of the second sleeve 42 near the first nut 30 to limit the axial displacement of the second sleeve 42.

[0039] Specifically, the limiting platform 413 is set to limit the relative axial displacement of the first sleeve 41 and the second sleeve 42, so as to avoid excessive compression of the elastic element 43 and damage to the elastic element 43.

[0040] In some embodiments, referring to Figures 1 to 3, the sealing ring 60 is embedded on the end face of the limiting platform 413 near the second sleeve 42 for abutting and engaging with the second sleeve 42.

[0041] Specifically, when tightening the second nut 50, it is only necessary to push the second sleeve 42 against the limiting platform 413 (at this time, the sealing ring 60 is also tightly fitted with the second sleeve 42), which not only avoids excessive compression of the elastic element 43, but also ensures the airtightness between the first sleeve 41 and the second sleeve 42.

[0042] In some embodiments, referring to Figures 1 to 3, the outer periphery of the bolt 20 is wrapped with PTFE tape.

[0043] Specifically, PTFE tape is provided between the first nut 30 and the bolt 20, and between the second nut 50 and the bolt 20, to ensure the sealing between the first nut 30 and the bolt 20, and between the second nut 50 and the bolt 20. At the same time, in conjunction with the sealing ring 60, the first sealing gasket 412 and the second sealing gasket 422, it can effectively prevent external impurities or moisture from entering the elastic clamping member 40 and extend the service life of the elastic member 43.

[0044] In some embodiments, referring to Figures 1 to 3, the outer peripheral wall of the second sleeve 42 is provided with an axially extending force-applying block 70.

[0045] Specifically, during the tightening of the second nut 50, it is convenient for the staff to hold the second sleeve 42, so as to avoid the elastic element 43 being twisted and damaged due to the squeezing force between the second nut 50 and the second sleeve 42 causing the second sleeve 42 to rotate.

[0046] In some embodiments, referring to Figures 1 to 3, the force-applying blocks 70 are provided at intervals in the circumferential direction of the second sleeve 42.

[0047] Specifically, the setting of multiple force-applying blocks 70 makes it easier for staff to find suitable hand-holding force-applying points.

[0048] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double-eared metal fitting, characterized in that, include: The U-shaped hanging ring has two ear plates, each with a through-hole, and the two ear holes are arranged opposite each other; a bolt passes through the two ear holes; a first nut is threaded to the tail of the bolt and is used to abut against the outer wall of the ear plate away from the head of the bolt; an elastic clamping member is slidably sleeved on the outer periphery of the bolt and located outside the first nut; and a second nut is threaded to the tail of the bolt and is used to rotate and push the elastic clamping member to elastically abut against the outer end face of the first nut.

2. The double-eared fitting as described in claim 1, characterized in that, The elastic clamping member includes: a first sleeve, slidably sleeved on the outer periphery of the bolt; a second sleeve, slidably sleeved on the outer periphery of the first sleeve; and an elastic member, disposed inside the first sleeve and extending axially into the second sleeve, wherein the two ends of the elastic member are respectively connected to the first sleeve and the second sleeve; wherein, the end of the first sleeve near the first nut is used to abut against the first nut, and the end of the second sleeve near the second nut is used to abut against the second nut.

3. The double-eared fitting as described in claim 2, characterized in that, The first sleeve has a first abutment platform that converges towards the central axis at one end near the first nut, and the second sleeve has a second abutment platform that converges towards the central axis at one end near the second nut. The two ends of the elastic member are respectively connected to the first abutment platform and the second abutment platform.

4. The double-eared fitting as described in claim 3, characterized in that, A first sealing gasket for abutting and engaging with the first nut is embedded on the outer end face of the first abutment platform, and a second sealing gasket for abutting and engaging with the second nut is embedded on the outer end face of the second abutment platform.

5. The double-eared fitting as described in claim 4, characterized in that, A sealing ring is provided between the first sleeve and the second sleeve.

6. The double-eared fitting as described in claim 5, characterized in that, The outer peripheral wall of the first sleeve is provided with a limiting platform that protrudes outward. The limiting platform is used to abut against the end face of the second sleeve near the first nut to limit the axial displacement of the second sleeve.

7. The double-eared fitting as described in claim 6, characterized in that, The sealing ring is embedded on the end face of the limiting platform near the second sleeve, and is used to abut and cooperate with the second sleeve.

8. The double-eared fitting as described in claim 7, characterized in that, The bolt is wrapped with PTFE tape.

9. The double-eared fitting as described in claim 2, characterized in that, The outer peripheral wall of the second sleeve is provided with an axially extending force-applying block.

10. The double-eared fitting as described in claim 9, characterized in that, The force-applying blocks are arranged at intervals around the second sleeve.

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