Anti-falling bolt for electric power fitting
By designing the structure of the anti-falling bolts and using annular washers and limiters to limit and clamp the nuts, the problem of easy falling-off of nuts in electrical fittings is solved, and the safety and stability of the power system are improved.
Patent Information
- Application Number
- CN202422418130.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-10-08
AI Technical Summary
The nuts on the bolts used in electrical fittings can easily fall off due to rotation or vibration, leading to line failures and power system instability.
An anti-falling bolt is designed, including a bolt, a nut and an annular anti-falling washer. The washer is provided with an ear plate and a protrusion, combined with a guide groove and a limit piece, and prepared through integrated stamping to form a limiting and clamping structure for the nut to prevent the nut from rotating and falling off.
It effectively prevents the nut from falling off due to rotation or vibration, improves the safety and stability of the power system, has a simple structure and is easy to operate.
Smart Images
Figure CN223359643U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bolts for electric power, in particular to an anti-falling bolt for electric power fittings. Background Art
[0002] Power fittings are metal accessories that connect and combine various devices in the power system to transmit mechanical and electrical loads and provide some protection. They play a vital role in the power industry. The quality, correct use, and installation of power fittings have a significant impact on the safe transmission of power lines. Even minor damage can cause line failure, which in turn affects the stable operation of the entire power system.
[0003] Bolts for power fittings are widely used in various power equipment and lines, such as overhead transmission lines, cable lines, and substations. In overhead transmission lines, bolts connect insulator strings and towers; in cable lines, bolts secure cable terminals and intermediate joints; and in substations, bolts connect various electrical equipment and switchgear. Bolts are key components used to connect, secure, or support power fittings in power systems, and their quality and performance directly impact the safe and stable operation of power systems.
[0004] Unlike nut tightening in other industries, the nuts on power fittings are prone to falling off from the bolts due to rotation, vibration, and other reasons during use. To solve the technical problem of falling off, existing power fitting bolts are generally equipped with a closed pin for easy installation and removal. However, due to the rotation or vibration of the nut on the bolt, the pin is easily worn repeatedly, eventually causing the pin and nut to fall off one after another. Utility Model Content
[0005] Aiming at the technical problem that nuts are easy to fall off on bolts due to rotation or vibration, the utility model provides an anti-falling bolt for electric hardware, which can solve the technical problem that nuts are easy to fall off on bolts due to rotation or vibration.
[0006] The utility model provides an anti-falling bolt for electric hardware, comprising a bolt, a nut matched therewith, and an annular anti-falling washer, the annular anti-falling washer being sleeved on the bolt, two symmetrically distributed ear plates being provided at the edge of the lower surface of the anti-falling washer, the inner sides of the two ear plates being in close contact with the flat parts of the outer side surfaces of the nut respectively, two symmetrically distributed ear plates with holes being provided at the edge of the surface of the anti-falling washer, each ear plate with holes being provided with a positioning hole, the bolt being provided with a pin hole which passes through the interior thereof transversely, the two positioning holes and the pin hole being located on the same straight line, and pins being inserted into the positioning holes and the pin holes.
[0007] Furthermore, the anti-dropout washer has two symmetrical protrusions on its inner wall, and two guide grooves that cooperate with the protrusions are provided on the outer surface of the bolt. The upper ends of the two guide grooves form notches on the upper end surface of the bolt, and the two protrusions are inserted into the corresponding guide grooves at the notches. The function of the guide grooves is that, on the one hand, the guide grooves can provide guidance for the anti-dropout washer when it is sleeved, and on the other hand, the protrusions located in the guide grooves limit the rotation of the nut, further improving the anti-rotation effect of the anti-dropout washer. Furthermore, a plurality of stoppers are provided from top to bottom within the guide groove, including a stop groove provided at the bottom of the guide groove, a wedge-shaped stop block provided within the stop groove, and a spring connected between the stop block and the bottom of the stop groove. When the spring is in its natural state, the end of the stop block extends outside the stop groove. When the spring is fully compressed, the stop block is completely located within the stop groove. The function of the stop block and the protrusions is to block the anti-dropout washer, preventing the anti-dropout washer from sliding out of the guide groove after the pin is dislodged, providing a double insurance function.
[0008] Furthermore, the two perforated ear plates are located at the edge of the upper surface of the anti-falling gasket, and the openings at both ends of the pin hole are respectively located in the two guide grooves. The anti-falling gasket, perforated ear plate, protrusion, and ear plate are an integrated structure, which is conducive to preparation by integrated stamping and simple production.
[0009] Furthermore, two ear plates with holes are located at the edge of the lower surface of the anti-falling washer, and a cross bar is connected between the inner walls of the anti-falling washer. The cross bar passes through the center of the anti-falling washer, and the upper end of the bolt is provided with a limiting groove that cooperates with the cross bar. The lower surface of the anti-falling washer is tightly attached to the upper end of the bolt and the cross bar is located in the limiting groove.
[0010] Furthermore, at least two protruding portions protruding outward are provided on the pin near the end of the pin, and the protruding portions extend out of the ear plate with holes, so as to limit the pin and prevent it from falling out.
[0011] Furthermore, the inner diameter of the anti-dropout washer is 1 to 2 mm larger than the outer diameter of the bolt. This allows for a certain clearance between the anti-dropout washer and the bolt to prevent the anti-dropout washer from contacting the bolt and wearing out the threads.
[0012] Furthermore, the lugs and the anti-drop washer plane have an angle of 70° to 90°. Furthermore, the 70° angle between the lugs and the anti-drop washer plane allows the two lugs to converge to form a clamping structure, which facilitates elastic clamping when further clamping the nut surface, preventing the nut from rotating.
[0013] Furthermore, the thickness of the anti-falling washer is 1-5 mm. The function is that the thickness of the anti-falling washer is greater than the thread pitch, which can prevent the inner side wall of the anti-falling washer from rubbing and damaging the thread.
[0014] The beneficial effects of the utility model are that when the utility model is used, the end of the pin can be inserted into the positioning hole and the pin hole, the anti-falling washer is fixed to the bolt, and the two ear plates on the lower surface of the anti-falling washer are tightly clamped against the nut to form a limit for the rotation of the nut. The structure is simple and the operation is convenient, which solves the technical problem of the nut falling off due to rotation or vibration when the electrical hardware is used. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of Example 1 of the specific implementation method of the present utility model.
[0017] Figure 2 It is an exploded view of Example 1 of the specific implementation method of the present utility model.
[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the bolt in Example 1 of the specific implementation method of the present utility model.
[0019] Figure 4 yes Figure 3 Enlarged view of the part in the middle circle.
[0020] Figure 5 It is a schematic diagram of the partial structure of Example 2 of the specific implementation method of the present utility model.
[0021] Figure 6 It is an exploded view of Example 3 of the specific implementation method of the present utility model.
[0022] Figure 7 It is a side view of the anti-fall-off gasket of Example 4 of the specific implementation method of the present utility model.
[0023] In the figure, 1-bolt, 2-nut, 3-anti-falling washer, 4-pin, 5-guide groove, 51-notch, 6-pin hole, 7-protrusion, 8-ear plate with hole, 81-positioning hole, 9-limiting piece, 91-limiting groove, 92-spring, 93-limiting block, 10-ear plate, 11-raised part, 12-cross bar, 13-limiting groove. DETAILED DESCRIPTION
[0024] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.
[0025] Example 1
[0026] Combine Figures 1-4 The utility model provides an anti-falling bolt for electric hardware, comprising a bolt 1, a nut 2 matched therewith, and an annular anti-falling washer 3. Two symmetrical protrusions 7 are provided on the inner wall of the anti-falling washer 3, and two guide grooves 5 matched with the protrusions 7 are provided on the outer surface of the bolt 1. The upper ends of the two guide grooves 5 form a notch 51 on the upper end surface of the bolt 1, and the two protrusions 7 are respectively inserted into the corresponding guide grooves 5 at the notch 51. The edge of the lower surface of the anti-falling washer 3 is provided with two symmetrically distributed ears. Plate 10, the inner sides of the two ear plates 10 are respectively in close contact with the flat parts of the outer sides of the nut 2, and the upper surface of the anti-falling washer 3 is provided with two symmetrically distributed ear plates 8 with holes. The ear plates 8 with holes are located at the edge of the upper surface of the anti-falling washer 3. Each ear plate 8 with holes is provided with a positioning hole 81, and the bolt 1 is provided with a pin hole 6 that passes through it horizontally. The openings at both ends of the pin hole 6 are respectively located in the two guide grooves 5. The two positioning holes 81 and the pin hole 6 are located on the same straight line, and the positioning holes 81 and the pin holes 6 are inserted with pins 4.
[0027] The anti-drop washer 3, the ear plate with holes 8, the protrusion 7 and the ear plate 10 in the utility model are an integrated structure, which is prepared by an integrated stamping method, and is easy to produce. There is an angle between the two ear plates 10 and the plane of the anti-drop washer 3, and the angle α is 90°.
[0028] The utility model is provided with two outwardly protruding ridges 11 on the pin 4 near the end of the pin 4, and the protruding ridges 11 extend out of the perforated ear plate 8. The protruding ridges 11 can form a limit for the pin 4 to prevent the pin 4 from falling out.
[0029] The outer diameter of the bolt 1 of the present invention is 10 mm, the inner diameter of the anti-falling washer 3 is 12 mm, and there is a certain margin between the anti-falling washer 3 and the bolt 1 to prevent the anti-falling washer 3 from contacting and wearing the thread of the bolt 1.
[0030] The thickness of the anti-falling washer 3 of the present invention is 1-5 mm. The function is that the thickness of the anti-falling washer 3 is greater than the thread pitch, which can prevent the inner side wall of the anti-falling washer 3 from rubbing and damaging the thread.
[0031] The method of using the present invention is as follows: the two protrusions 7 on the inner wall of the anti-falling washer 3 are inserted into the corresponding guide grooves 5 at the notch 51, so that the inner side surfaces of the two ear plates 10 are tightly attached to the outer flat part of the nut 2 to form a clamping. At this time, the two positioning holes 81 and the pin hole 6 are located on the same straight line. The end of the pin 4 is inserted into the positioning hole 81 and the pin hole 6, and the anti-falling washer 3 is fixed to the bolt 1 to form a blockage for the nut 2 to prevent the nut 2 from falling out. At the same time, the two ear plates 10 tightly clamp the nut 2 to form a limit for the rotation of the nut 2, preventing the nut 2 from rotating and further improving the anti-falling effect.
[0032] Example 2
[0033] The difference between Example 2 and Example 1 is that Figure 5 In Example 2, several limit members 9 are provided from top to bottom in the guide groove 5. The limit members 9 include a limit groove 91 provided at the bottom of the guide groove 5. A wedge-shaped limit block 93 is provided in the limit groove 91. A spring 92 is connected between the limit block 93 and the bottom of the limit groove 91. When the spring 92 is in a natural state, the end of the limit block 93 extends out of the limit groove 91. When the spring 92 is in a fully compressed state, the limit block 93 is completely located inside the limit groove 91. Its function is to cooperate with the protrusion 7 to form a block against the anti-falling washer 3, preventing the anti-falling washer 3 from sliding out of the guide groove 5 after the pin 4 falls out, providing a double insurance function.
[0034] Example 3
[0035] Combine Figure 6 , Example 3 is different from Example 1 in that it has no guide groove structure, and the two perforated ear plates 8 are located at the edge of the lower surface of the anti-falling washer 3. A cross bar 12 is connected between the inner walls of the anti-falling washer 3, and the cross bar 12 passes through the center of the anti-falling washer 3. The upper end of the bolt 1 is provided with a limiting groove 13 that cooperates with the cross bar 12. The lower surface of the anti-falling washer 3 is tightly attached to the upper end of the bolt 1 and the cross bar 12 is located in the limiting groove 13. The function is that, compared with the protrusion and guide groove design of Example 1, the protrusion area is small and the force is limited, and it is easy to be deformed by force and fall out of the guide groove. In Example 3, the cross bar 12 is matched with the limiting groove 13, and the cross bar 12 is subjected to greater force. When subjected to a large rotational force, the protrusion will not be deformed, thereby improving safety.
[0036] Example 4
[0037] Combine Figure 7 The difference between Example 4 and Example 1 is that there is an angle between the two ear plates 10 and the plane of the anti-falling washer 3, and the angle α is 70°. The function is to make the two ear plates 10 gather inward to form an elastic clamping structure, which is conducive to further clamping the surface of the nut 2, preventing the nut 2 from rotating, and improving the anti-falling effect.
[0038] Although the present invention has been described in detail with reference to the accompanying drawings and in conjunction with preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, persons of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and such modifications or substitutions shall fall within the scope of the present invention. Any changes or substitutions that can be easily conceived by persons skilled in the art within the technical scope disclosed in the present invention shall fall within the scope of protection of the present invention.
Claims
1. An anti-drop bolt for electric power fittings, comprising a bolt provided with a nut mating therewith, characterized in that: It also includes an annular anti-falling washer, which is sleeved on the bolt. Two symmetrically distributed ear plates are provided at the edge of the lower surface of the anti-falling washer. The inner sides of the two ear plates are respectively tightly attached to the flat parts of the outer side of the nut. Two symmetrically distributed ear plates with holes are provided at the edge of the surface of the anti-falling washer. Each ear plate with holes has a positioning hole. The bolt is provided with a pin hole that passes through it horizontally. The two positioning holes and the pin hole are located on the same straight line, and pins are inserted into the positioning holes and the pin holes.
2. The anti-drop bolt for electric power fittings according to claim 1, characterized in that: Two symmetrical protrusions are provided on the inner wall of the anti-falling washer, and two guide grooves cooperating with the protrusions are provided on the outer surface of the bolt. The upper ends of the two guide grooves form notches on the upper end surface of the bolt, and the two protrusions are respectively inserted into the corresponding guide grooves at the notches.
3. The anti-drop bolt for electric power fittings according to claim 2, characterized in that: The two ear plates with holes are located at the edge of the upper surface of the anti-falling washer, and the openings at both ends of the pin hole are respectively located in the two guide grooves. The anti-falling washer, the ear plates with holes, the protrusions and the ear plates are an integrated structure.
4. The anti-drop bolt for electric power fittings according to claim 1, characterized in that: The two ear plates with holes are located at the edge of the lower surface of the anti-falling washer. A cross bar is connected between the inner walls of the anti-falling washer. The cross bar passes through the center of the anti-falling washer. The upper end of the bolt is provided with a limiting groove that cooperates with the cross bar. The lower surface of the anti-falling washer is tightly attached to the upper end of the bolt and the cross bar is located in the limiting groove.
5. The anti-drop bolt for electric power fittings according to claim 1, characterized in that: At least two protruding parts protruding outward are provided on the pin near the end of the pin, and the protruding parts extend out of the ear plate with holes.
6. The anti-drop bolt for electric power fittings according to claim 1, characterized in that: The inner diameter of the anti-falling washer is 1~2mm larger than the outer diameter of the bolt.
7. The anti-drop bolt for electric power fittings according to claim 1, characterized in that: An included angle between the ear plate and the anti-fall-off washer plane is 70°~90°.
8. The anti-drop bolt for electric power fittings according to claim 1, characterized in that: The thickness of the anti-falling gasket is 1~5mm.