Anti-loose fixing device for a bevelled door

Abstract

The utility model discloses a kind of anti-loose fixing devices for angle plug door, it is related to angle plug door technical field.The utility model includes device ontology, plug door ontology, the mounting seat of L-shaped structure installed in vehicle tail, device ontology is installed between plug door ontology and mounting seat, plug door ontology tail end is connected with main pipe connecting section by transition section, the opposite side of transition section peripheral surface is equipped with flat groove, and the angle of 60 degrees is formed between flat groove and the center line of plug door ontology.The utility model is equipped with two flat grooves by setting in plug door ontology, and is matched with use lower hold mechanism and upper pressing mechanism, and is constituted with the fixed hold point of upper and lower clamping, fundamentally prevents plug door from happening circumferential rotation, upgrades traditional single-point hold to three-point formula bidirectional mechanical interlock, can bear greater impact load, greatly improves the safety reliability of train braking system end key connection point, improves the stability and security of plug door.

Description

Technical Field

[0001] This utility model belongs to the field of corner plug technology, and in particular relates to an anti-loosening fixing device for corner plugs. Background Technology

[0002] In railway freight car braking systems, the angle plug is a key component connecting the train hose and the brake hose. Its reliable fixing directly affects the sealing performance of the braking system and operational safety. Currently, the mainstream fixing methods are as follows: The angle plug is designed with a double thread structure at the tail end: its inner thread is used to directly screw into the interface of the rear main pipe to achieve the initial connection and sealing of the air passage, while its outer thread has a large locking nut screwed on it. After tightening, the end face of the locking nut will press against the end face of the main pipe interface, mainly to prevent loosening and assist in sealing. In order to further prevent the plug from loosening during vibration, the existing technology adds a U-shaped clip between the above-mentioned fastening nut and the mounting seat on the vehicle body. The arc-shaped part of the U-shaped clip hugs the tubular part or fastening nut at the tail end of the plug, and its two ends are fixed to the mounting seat by nuts.

[0003] However, this structure has an inherent design contradiction and a core flaw resulting from it: Inherent contradiction: To ensure smooth operation and reasonable hose layout, after the angle cock is installed and fixed, its central axis must maintain an angle of about 30 degrees with the vertical line of the vehicle body. The arc-shaped inner wall of the U-shaped clip and the cylindrical end of the cock (or the fastening nut) have a smooth line contact. At a 30-degree angle, the longitudinal and lateral vibrations generated during vehicle operation will create a torque that causes the cock to rotate around its threaded connection point. The smooth arc-shaped contact cannot effectively resist this torque, which can easily cause the cock to slowly rotate circumferentially and move axially under long-term vibration, destroying the original pre-tightening state.

[0004] Meanwhile, the contact area between the U-shaped clamp and the plug is small. Under vibration load, stress is concentrated in a local area, which poses a risk of fatigue. Furthermore, the anti-loosening of the entire fixing system relies on threaded connections (internal thread of the plug, locking nut, and mounting nut of the U-shaped clamp). Under continuous vibration, these threaded pairs are at risk of self-loosening. Once any link loosens, the overall fixing effect will rapidly decrease. Summary of the Invention

[0005] The purpose of this invention is to provide an anti-loosening fixing device for angle stoppers. By setting two flat grooves on the stopper body and using a lower clamping mechanism and an upper pressing mechanism, a fixed clamping point with upper and lower clamping is formed, which fundamentally prevents the stopper from rotating circumferentially. This upgrades the traditional single-point clamping to a three-point bidirectional mechanical interlock, which can withstand greater impact loads and greatly improves the safety and reliability of the key connection point at the end of the train braking system, thereby improving the stability and safety of the stopper.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is an anti-loosening and fixing device for a corner plug, including a device body, a plug body, and an L-shaped mounting base installed at the rear of a vehicle, wherein the device body is installed between the plug body and the mounting base. The tail end of the plug body is connected to the main pipe connecting section through a transition section. The opposite sides of the peripheral side of the transition section are provided with flat grooves, and the flat grooves form a 60-degree angle with the center line of the plug body. The device body includes a lower clamping mechanism, an upper pressing mechanism, and an anti-loosening pad; The pressing mechanism includes a horizontal bar, on which a set of vertical bars are fixed. The horizontal bar is fitted into a flat groove near the mounting base in the transition section. The top of the vertical bar passes through the mounting base and is threaded with a first nut. The lower clamping mechanism includes a U-shaped rod, which includes a horizontal side and two vertical sides. The horizontal side is fitted into a flat groove below the transition section, and the top ends of the two vertical sides pass through the mounting base and are threaded with a second nut. The anti-loosening pad is disposed between the two first nuts and the two second nuts and the mounting base, and a permanent weld point is provided between the first nuts and the second nuts and the upper surface of the anti-loosening pad.

[0007] Furthermore, an arc-shaped segment is provided at the connection between the bottom end of the two vertical sides and the end of the horizontal sides, and the arc-shaped segment fits into the peripheral side of the transition segment.

[0008] Furthermore, the mounting base has pre-set openings on its horizontal side and anti-loosening pad to mate with the vertical rod and the vertical side.

[0009] Furthermore, the crossbar is a square-section bar, and the width of the crossbar is the same as the width of the flat groove.

[0010] Furthermore, the main pipe connection section has a main pipe connection thread inside, and a locking nut connection thread is provided on the peripheral side of the main pipe connection section.

[0011] Furthermore, the mounting base is located directly above the transition section, and the distance between the transition section and the mounting base is 2-3 times the thickness of the crossbar.

[0012] This utility model has the following beneficial effects: 1. This utility model, by setting two flat grooves on the upper and lower parts of the gate body and using a lower clamping mechanism and an upper pressing mechanism, forms a fixed clamping point that clamps from both above and below. The horizontal bar is pressed into the upper flat groove, effectively limiting the upward axial displacement of the gate, while the U-shaped clip is inserted into the lower flat groove, limiting its downward axial displacement. At the same time, the side wall of the horizontal groove is tightly fitted with the side plane of the clip and the pressure bar, forming a strong anti-rotation torque, fundamentally preventing the gate from rotating circumferentially. This upgrades the traditional single-point clamping to a three-point bidirectional mechanical interlock, which can withstand greater impact loads and greatly improves the safety and reliability of the key connection point at the end of the train braking system. The positioning accuracy and stability are significantly improved, enhancing the stability and safety of the gate.

[0013] 2. This utility model uses the design of anti-loosening pads to permanently spot weld four nuts to the anti-loosening pads, achieving permanent locking of the threaded pair. This design completely eliminates the possibility of nuts loosening on their own under extreme vibration conditions, ensuring the long-term maintenance of the fixing preload. It is particularly suitable for railway working conditions with extremely high requirements for safety and maintenance-free operation. Similarly, when replacing the plug valve, the mounting base will not be damaged, ensuring modularity and standardization of installation and production.

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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.

[0016] Figure 1 This is a schematic diagram of the anti-loosening fixing device for a corner plug according to the present invention; Figure 2 A structural sectional view at the locations of the crossbars and U-shaped bars; Figure 3 This is a schematic diagram of the structure of this utility model after installation; The attached diagram lists the components represented by each number as follows: 1-Plug body, 2-Mounting base, 3-Anti-loosening pad, 4-Horizontal bar, 5-U-shaped bar, 6-Main pipe, 7-Locking nut, 101-Transition section, 102-Main pipe connection section, 103-Flat groove, 401-Vertical bar, 402-First nut, 501-Horizontal side, 502-Vertical side, 503-Second nut, 504-Arc-shaped section. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-3 As shown, this utility model is an anti-loosening fixing device for a corner plug, including a device body, a plug body 1, and an L-shaped mounting base 2 installed at the rear of the vehicle. The device body is installed between the plug body 1 and the mounting base 2. The tail end of the plug body 1 is connected to the main pipe connection section 102 via a transition section 101. The opposite sides of the circumferential side of the transition section 101 are provided with flat grooves 103, and the flat grooves 103 form a 60-degree angle with the center line of the plug body 1. The device body includes a lower clamping mechanism, an upper pressing mechanism, and an anti-loosening pad 3; The pressing mechanism includes a horizontal bar 4, on which a set of vertical bars 401 are fixed. The horizontal bar 4 is fitted into the flat groove 103 of the transition section 101 near the mounting base 2. The top of the vertical bar 401 passes through the mounting base 2 and is threaded with a first nut 402. The lower clamping mechanism includes a U-shaped rod 5, which includes a horizontal side 501 and two vertical sides 502. The horizontal side 501 is fitted into the flat groove 103 below the transition section 101, and the top ends of the two vertical sides 502 pass through the mounting base 2 and are threadedly connected to the second nut 503. The anti-loosening pad 3 is disposed between the two first nuts 402 and the two second nuts 503 and the mounting base 2, and permanent weld points are provided between the first nuts 402 and the second nuts 503 and the upper surface of the anti-loosening pad 3.

[0019] Among them, such as Figure 1-2 As shown, an arc-shaped section 504 is provided at the connection between the bottom end of the two vertical sides 502 and the end of the horizontal side 501, and the arc-shaped section 504 fits against the circumferential side of the transition section 101.

[0020] Among them, such as Figure 1-2 As shown, the horizontal edge of the mounting base 2 and the anti-loosening pad 3 are both provided with preset openings that cooperate with the vertical rod 401 and the vertical edge 502.

[0021] Among them, such as Figure 1-2 As shown, the crossbar 4 is a square-section bar, and the width of the crossbar 4 is the same as the width of the flat groove 103.

[0022] Among them, such as Figure 3As shown, the main pipe connecting section 102 has a main pipe connecting thread inside the pipe, and a locking nut connecting thread is provided on the peripheral side of the main pipe connecting section 102. The end of the main pipe 6 is threaded and wrapped with raw rubber tape before being threaded to the main pipe connecting section 102. A locking nut 7 is threaded between the main pipe 6 and the main pipe connecting section 102.

[0023] Among them, such as Figure 3 As shown, the mounting base 2 is located directly above the transition section 101. The distance between the transition section 101 and the mounting base 2 is 2-3 times the thickness of the crossbar 4. The distance is used to make way when the plug body 1 is installed, and the position of the crossbar 4 is pre-fixed before the plug body 1 is installed to avoid subsequent installation failure.

[0024] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A locking device for a corner plug, comprising a device body, a plug body (1), and an L-shaped mounting base (2) installed at the rear of a vehicle, wherein the device body is installed between the plug body (1) and the mounting base (2), characterized in that: The tail end of the plug body (1) is connected to the main pipe connection section (102) through the transition section (101). The opposite sides of the peripheral side of the transition section (101) are provided with flat grooves (103), and the flat grooves (103) form a 60-degree angle with the center line of the plug body (1). The device body includes a lower clamping mechanism, an upper pressing mechanism, and an anti-loosening pad (3); The pressing mechanism includes a horizontal bar (4), on which a set of vertical bars (401) are fixed. The horizontal bar (4) is fitted into the flat groove (103) of the transition section (101) near the mounting base (2). The top of the vertical bar (401) passes through the mounting base (2) and is threaded with a first nut (402). The lower clamping mechanism includes a U-shaped rod (5), which includes a horizontal side (501) and two vertical sides (502). The horizontal side (501) is fitted into a flat groove (103) below the transition section (101), and the top ends of the two vertical sides (502) pass through the mounting base (2) and are threaded with a second nut (503). The anti-loosening pad (3) is disposed between the two first nuts (402) and the two second nuts (503) and the mounting base (2), and permanent weld points are provided between the first nuts (402) and the second nuts (503) and the upper surface of the anti-loosening pad (3).

2. The anti-loosening fixing device for an angle plug according to claim 1, characterized in that, An arc-shaped segment (504) is provided at the connection between the bottom end of the two vertical sides (502) and the end of the horizontal side (501), and the arc-shaped segment (504) fits against the peripheral side of the transition segment (101).

3. The anti-loosening fixing device for an angle plug according to claim 1, characterized in that, The mounting base (2) and the anti-loosening pad (3) are both provided with preset openings that cooperate with the vertical rod (401) and the vertical side (502).

4. The anti-loosening fixing device for an angle plug according to claim 1, characterized in that, The crossbar (4) is a square-section bar, and the width of the crossbar (4) is the same as the width of the flat groove (103).

5. The anti-loosening fixing device for an angle plug according to claim 1, characterized in that, The main pipe connecting section (102) has a main pipe connecting thread inside the pipe, and a locking nut connecting thread is provided on the peripheral side of the main pipe connecting section (102).

6. The anti-loosening fixing device for an angle plug according to claim 1, characterized in that, The mounting base (2) is located directly above the transition section (101), and the distance between the transition section (101) and the mounting base (2) is 2-3 times the thickness of the crossbar (4).

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