R-shaped anti-falling locking pin

Abstract

An R-shaped anti-falling locking pin comprises a locking pin body and a gasket, a gasket hole is formed in the end of the gasket, and the gasket comprises a horizontal part and a circular ring part with the gasket hole. The gasket is arranged in the U-shaped ring end of the locking pin body through the gasket hole, and a U-shaped ring end clamping device and a concave part limiting device are further arranged on the horizontal part of the gasket and used for clamping the U-shaped ring end of the locking pin body and limiting the concave part of the locking pin body respectively. According to the utility model, the difficulty that the locking pin body falls off from the socket pin hole can be increased by utilizing the elastic fixing device and the limiting lug boss which are additionally arranged on the gasket, so that the probability of hardware fitting falling accidents caused by the falling of the locking pin is reduced.

Description

Technical Field

[0001] The utility model relates to the field of electric power hardware, in particular to an R-shaped anti-falling locking pin. Background Art

[0002] Bowl-type hardware is a key connecting component of overhead transmission lines. It is typically connected to the ball end of an insulator string. During operation, a locking pin is inserted into the bowl's pin hole to prevent the ball end from falling out. Due to the influence of inclement weather, wear, and other factors on the hardware string, the locking pin can easily fall out of the bowl, causing safety accidents such as hardware falling out of the line.

[0003] Patent application number 201820631818.7, entitled "An Extended R-Type Locking Pin," discloses an extended R-type locking pin comprising a drum structure, a straight-edge portion, and a pin leg. The straight-edge portion is added between the raised drum structure and the pin leg. The straight-edge portion is used to create a transition between the pin leg and the ball-and-socket joint of the insulator string, allowing the pin leg to fully penetrate the joint and flare outward to achieve a locked state. Compared to traditional R-type pins, this extended R-type locking pin is more suitable for locking the ball-and-socket joint of transmission line insulator strings, preventing the pin leg from failing and falling out due to prolonged compression caused by insufficient length.

[0004] However, precisely because the locking pin is simple to install, during use, especially in the application scenario of fixing hardware, the locking pin has the disadvantage of being easy to fall off due to its small cross-sectional area.

[0005] On the other hand, as described in the technical solution disclosed in the patent "An Extended R-Type Locking Pin", the locking method of the existing locking pin is not reasonable enough, and the working method of the locking pin needs to be further improved. Summary of the Invention

[0006] The purpose of the utility model is to provide an R-type anti-falling locking pin, which can make use of the elastic fixing device and the limiting protrusion added on the gasket to increase the difficulty of the locking pin body falling off from the bowl head pin hole, thereby reducing the probability of hardware falling off accidents caused by the falling off of the locking pin.

[0007] The utility model adopts the following technical solutions:

[0008] An R-type anti-falling locking pin comprises a locking pin body and a gasket, a gasket hole is provided at the end of the gasket, the gasket comprises a horizontal portion and a circular ring portion with the gasket hole; the gasket is arranged inside the U-shaped ring end of the locking pin body through the gasket hole, and a U-shaped ring end clamping device and a recessed portion limiting device are also provided on the horizontal portion of the gasket, which are respectively used to clamp the U-shaped ring end of the locking pin body and limit the recessed portion of the locking pin body.

[0009] The U-shaped ring end clamping device adopts an elastic fixing device, which is arranged at the connection between the circular ring part and the horizontal part and a through hole is opened at the connection. The elastic fixing device includes a support shaft arranged in the through hole and provided with an anti-slip part at the lower end; a support plate is provided at the upper end of the support shaft, and a spring is provided on the support shaft between the support plate and the gasket, and clamping parts for clamping the U-shaped ring end of the locking pin body are respectively provided at both ends of the support plate.

[0010] The anti-slip portion is a boss.

[0011] The adjacent sides of the two clamping parts are both inclined surfaces, and the two clamping parts and the support plate together form a trapezoidal clamping space.

[0012] The recessed portion limiting device adopts a limiting protrusion; two groups of limiting protrusions are correspondingly arranged on the gaskets on both sides of the recessed portion of the locking pin body, the two groups of limiting protrusions are arranged in parallel and the size between the two groups of limiting protrusions is not less than the outer diameter of the recessed portion.

[0013] The two limiting protrusions are strip-shaped protrusions, and adjacent sides of the two limiting protrusions are inclined surfaces. The two limiting protrusions and the horizontal portion of the gasket together form a trapezoidal clamping space.

[0014] The elastic fixing device is coaxially and vertically arranged with the through hole, and the initial position of the clamping portion of the elastic fixing device is higher than the upper end of the locking pin body.

[0015] The inner sides of the clamping parts are all provided with anti-slip grooves.

[0016] The inner sides of the position-limiting protrusions are all provided with anti-slip grooves.

[0017] The support shaft and the support plate are arranged in a welding manner or a threaded connection manner.

[0018] The utility model can ensure the stable fixation of the locking pin body by adding the elastic fixing device and the limiting protrusion, and can also meet the requirement that after the locking pin body is knocked into the bowl-shaped hardware by external force, the contact part between the gasket and the locking pin body is always in the middle of the limiting protrusion provided on the gasket, thereby limiting the swing amplitude of the gasket;

[0019] Furthermore, the gasket is connected to the locking pin body through a gasket hole opened at the end. The gasket and the gasket hole are integrated. The gasket is rectangular. By adding the gasket to the locking pin body, the thickness of the gasket increases the cross-sectional area of the locking pin when working, thereby increasing the difficulty of the locking pin falling off from the cup head pin hole.

[0020] Furthermore, under the action of the spring, the initial position of the clamping portion of the elastic fixing device is higher than the upper end of the locking pin body, and the lower end of the handheld support shaft is pulled downward to enable the clamping portion to initially clamp the upper end of the locking pin body;

[0021] Furthermore, the diameter of the spring is larger than the diameter of the through hole, the upper end of the spring is fixedly connected to the support plate, and the lower end is fixedly connected to the upper end of the gasket through hole. The elastic force of the spring increases the clamping force of the clamping part, which can effectively increase the fixing effect of the elastic fixing device.

[0022] Furthermore, the elastic fixing device is arranged perpendicular to the through hole, and the elastic force provided by the elastic fixing device can better act vertically upward on the locking pin body;

[0023] The utility model is simple to operate and safe and reliable. The combined use of the elastic fixing device and the limiting protrusion effectively reduces the occurrence of the R-shaped locking pin falling off, thereby eliminating safety hazards. On the other hand, the utility model has a simple structure, strong practicality, and is easy to process and produce, with low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the utility model;

[0025] Figure 2 This is a schematic structural diagram of the gasket and elastic fixing device of the utility model;

[0026] Figure 3 for Figure 2 A partial enlarged schematic diagram of point A in the middle;

[0027] Figure 4 This is a schematic structural diagram of the gasket of the present utility model. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments disclosed in the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0029] The following describes various non-limiting embodiments of the present invention in detail. The numbers of any elements in the drawings are for illustration only and not for limitation, and any names are for distinction only and do not have any limiting meaning.

[0030] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0031] See also Figure 1-4 The present invention will be described in detail below with reference to the accompanying drawings and embodiments:

[0032] The R-type anti-falling locking pin described in the present invention includes a locking pin body 8 and a gasket 6. The gasket 6 includes a circular ring portion 6-1 and a horizontal portion 6-2. The circular ring portion 6-1 has a gasket hole 1. The gasket 6 is arranged inside the U-shaped ring end 2 of the locking pin body 8 through the gasket hole 1. The horizontal portion 6-2 of the gasket 6 is also provided with a U-shaped ring end clamping device and a recessed portion limiting device, which are used to clamp the U-shaped ring end 2 of the locking pin body 8 and limit the recessed portion 5 of the locking pin body 8.

[0033] In the present invention, the U-shaped ring end clamping device adopts an elastic fixing device 3, which is arranged at the connection between the circular ring part 6-1 and the horizontal part 6-2 and a through hole 15 is opened at the connection. The elastic fixing device 3 includes a support shaft 9 arranged in the through hole 15 and provided with an anti-slip portion at the lower end, and the anti-slip portion can adopt a boss 11; a support plate 12 is provided at the upper end of the support shaft 9, and the support shaft 9 and the support plate 12 can be welded or threaded; a spring 10 is sleeved on the support shaft 9 between the support plate 12 and the gasket 6, and the two ends of the support plate 12 are respectively provided with clamping parts 13 for clamping the U-shaped ring end 2 of the locking pin body 8; under the action of the spring 10, the support plate 12 moves upward and clamps and limits the U-shaped ring end 2, and at the same time can play the role of expanding the U-shaped ring end 2, thereby enhancing the anti-slip effect.

[0034] To accommodate U-shaped ring ends 2 of different outer diameters, in the present invention, adjacent sides of the two clamping portions 13 are both inclined surfaces. The two clamping portions 13 and the support plate 12 together form a trapezoidal clamping space, which can improve the versatility of the present invention.

[0035] In the present invention, the recessed portion limiting device utilizes limiting protrusions 4; two sets of limiting protrusions 4 are correspondingly disposed on washers 6 on either side of the recessed portion 5 of the locking pin body 8. The two sets of limiting protrusions 4 are arranged in parallel, and the distance between the two sets of limiting protrusions 4 is not less than the outer diameter of the recessed portion 5. The inner sides of the limiting protrusions 4 are both provided with anti-slip grooves.

[0036] In order to adapt to the recessed portions 5 with different outer diameters, in the present invention, the two limiting protrusions 4 can be strip-shaped protrusions, and the adjacent sides of the two limiting protrusions 4 are both inclined surfaces. The two limiting protrusions 4 and the horizontal portion 6-1 of the gasket 6 together form a trapezoidal clamping space, which can improve the versatility of the present invention.

[0037] In the prior art, some staff also use the locking pin body 8 in combination with the gasket 6, and use the thickness of the gasket 6 to increase the cross-sectional area of the locking pin body 8 when working, reduce the contraction space of the support legs 7 in the locking pin body 8, and increase the difficulty of the locking pin body 8 falling off from the bowl head pin hole. However, the use of the gasket 6 and the locking pin body 8 in combination can easily cause the gasket 6 to swing easily during the process of knocking the locking pin body 8 into the bowl head hardware by external force, thereby losing the above-mentioned beneficial effect of reducing the contraction space of the support legs 7.

[0038] In the present invention, an elastic fixing device 3 and a limiting protrusion 4 are provided on the gasket 6. The elastic fixing device 3 utilizes the elastic force of the spring 10 in conjunction with the clamping portion 13 to clamp and limit the U-shaped ring end 2. This, on the one hand, can further increase the difficulty of the locking pin body 8 falling off from the bowl head pin hole, and on the other hand, can prevent the gasket 6 from swinging too much. After the locking pin body 8 enters the bowl head hardware, the recessed portion 5 of the locking pin body 8 is located in the trapezoidal clamping space formed by the two sets of limiting protrusions 4, which can further prevent the gasket 6 from swinging too much.

[0039] In the present invention, the length of the support shaft 9 is greater than the height of the gasket 6. In this embodiment, under the action of the spring 10, the clamping portion 13 of the elastic fixing device 3 is initially positioned higher than the upper end of the locking pin body 8. Pulling down the lower end of the support shaft 9 causes the clamping portion 13 to initially clamp the upper end of the locking pin body 8, so that the locking pin body 8 and the gasket 6 are arranged perpendicularly.

[0040] In the present invention, the diameter of the spring 10 is larger than the diameter of the through hole 14. The upper end of the spring 10 contacts the support plate 11, and the lower end contacts the gasket 6. In this embodiment, the spring 10 is made of stainless steel, which has the advantage of good fatigue resistance and can effectively increase the fixing effect of the elastic fixing device 3.

[0041] In this embodiment, the elastic fixing device 3 is coaxially and vertically arranged with the through hole 15 , so that the elastic force provided by the elastic fixing device 3 can better act on the locking pin body 8 vertically upward.

[0042] In the present invention, anti-slip grooves are provided on the inner side of the clamping portion 13. In this embodiment, the downward pressure of the bowl-shaped hardware on the locking pin body 8, combined with the upward elastic force of the spring 10, can ensure the clamping effect of the clamping portion 13 and the U-shaped ring end 2.

[0043] The present invention has a simple structure, strong practicality, and is easy to manufacture and produce at a low production cost. Furthermore, the present invention can be implemented by adding an elastic fixing device and a position-limiting protrusion to an existing locking pin body, significantly reducing the cost of use for businesses. The present invention is simple to operate and is safe and reliable. When the elastic fixing device and the position-limiting protrusion are in tight contact with the locking pin body, they can increase the elasticity and fixity of the locking pin body, thereby eliminating potential safety hazards.

[0044] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "inside", "outside" and other terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings of this specification. They are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0045] In addition, in the description of this specification, “a plurality of” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. An R-type anti-drop locking pin, comprising a locking pin body and a washer, characterized in that: A gasket hole is opened at the end of the gasket, and the gasket includes a horizontal part and a circular ring part with a gasket hole; the gasket is arranged inside the U-shaped ring end of the locking pin body through the gasket hole, and a U-shaped ring end clamping device and a recessed part limiting device are also provided on the horizontal part of the gasket, which are respectively used to clamp the U-shaped ring end of the locking pin body and limit the recessed part of the locking pin body.

2. The R-shaped anti-drop locking pin according to claim 1, characterized in that: The U-shaped ring end clamping device adopts an elastic fixing device, which is arranged at the connection between the circular ring part and the horizontal part and a through hole is opened at the connection. The elastic fixing device includes a support shaft arranged in the through hole and provided with an anti-slip part at the lower end; a support plate is provided at the upper end of the support shaft, and a spring is provided on the support shaft between the support plate and the gasket, and clamping parts for clamping the U-shaped ring end of the locking pin body are respectively provided at both ends of the support plate.

3. The R-shaped anti-drop locking pin according to claim 2, characterized in that: The anti-slip portion is a boss.

4. The R-shaped anti-drop locking pin according to claim 2, characterized in that: The adjacent sides of the two clamping parts are both inclined surfaces, and the two clamping parts and the support plate together form a trapezoidal clamping space.

5. The R-shaped anti-drop locking pin according to claim 1, characterized in that: The recessed portion limiting device adopts a limiting protrusion; two groups of limiting protrusions are correspondingly arranged on the gaskets on both sides of the recessed portion of the locking pin body, the two groups of limiting protrusions are arranged in parallel and the size between the two groups of limiting protrusions is not less than the outer diameter of the recessed portion.

6. The R-shaped anti-drop locking pin according to claim 5, characterized in that: The two limiting protrusions are strip-shaped protrusions, and adjacent sides of the two limiting protrusions are inclined surfaces. The two limiting protrusions and the horizontal portion of the gasket together form a trapezoidal clamping space.

7. The R-shaped anti-drop locking pin according to claim 2, characterized in that: The elastic fixing device is coaxially and vertically arranged with the through hole, and the initial position of the clamping portion of the elastic fixing device is higher than the upper end of the locking pin body.

8. The R-shaped anti-drop locking pin according to claim 2, characterized in that: The inner sides of the clamping parts are all provided with anti-slip grooves.

9. The R-shaped anti-drop locking pin according to claim 5, characterized in that: The inner sides of the position-limiting protrusions are all provided with anti-slip grooves.

10. The R-shaped anti-drop locking pin according to claim 2, characterized in that: The support shaft and the support plate are arranged in a welding manner or a threaded connection manner.

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