A locking screw assembly

Abstract

The utility model discloses a locking screw subassembly relates to screw subassembly technical field, the utility model discloses a screw rod, the top of screw rod is fixed with the nut, the outer surface of screw rod is equipped with the nut and the gasket, the top of nut is equipped with the connecting disc, and the one side of connecting disc top is connected with the locating bolt, the utility model discloses a spring and sealing piece are equipped with, when operating, the staff uses the hexagon wrench to press sealing piece, so that sealing piece overcomes the elasticity of spring and retracts into the internal hexagonal groove, so can install or disassemble the bolt, spring pushes sealing piece reset after operation, so can make sealing piece seal internal hexagonal groove, thereby can avoid the situation that the stone grain is stuck into the hexagonal hole and causes the hexagon wrench to be unable to insert, make the operation more convenient.

Description

Technical Field

[0001] This utility model relates to the field of screw assembly technology, specifically a locking screw assembly. Background Technology

[0002] Hex socket head cap screws are widely used in automobiles. With their core advantages of "small head space occupation, large tightening torque, and high connection strength", they are widely suitable for assembly scenarios in various automotive systems that are "compact in space and have high requirements for connection reliability".

[0003] When existing hex bolts are used in automobiles (especially in chassis systems), dirt or stones often get into the hex socket. This dirt or stones become stuck in the hole, preventing the insertion of a hex wrench and making bolt removal difficult. Simultaneously, due to vibration, the nut may move along the bolt's axis, causing the bolt-nut connection to loosen. This can lead to assembled items or equipment falling apart, creating safety hazards. Existing technology discloses a self-locking method (application number CN201921849994.9). The anti-vibration and anti-loosening bolt assembly includes a bolt, a fastening nut, and a washer. The bolt consists of a threaded rod and a bolt head, with a receiving cavity in the threaded rod. The washer has a connecting hole and a locking block, and the washer is fitted onto the threaded rod through the connecting hole and the locking block. The fastening nut includes a load-bearing surface, a non-load-bearing surface, and a hollow connecting part, with its upper and lower end faces being the non-load-bearing surface and the load-bearing surface, respectively. The fastening nut is fitted onto the threaded rod in the bolt through the washer. An anti-loosening structure is provided between the fastening nut and the washer, and the bolt and the fastening nut are fixedly connected through the anti-loosening structure. The anti-vibration and anti-loosening bolt assembly described in this utility model can prevent parts from becoming loose after connection. However, the patent clearly states in the specification that the gasket can only be disassembled by destroying the insertion cut and separation cut of the insert protrusion in the gasket. Destroying the gasket requires a lot of force, which can easily cause wear and stripping of the nut. Moreover, once the gasket is destroyed, it completely loses its reusability, and a new gasket must be replaced after each disassembly, resulting in unnecessary waste of metal materials. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a locking screw assembly to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a locking screw assembly, including a screw rod, a nut fixed to the top of the screw rod, a nut and a washer provided on the outer surface of the screw rod, a connecting plate provided on the top of the nut, and a positioning bolt threadedly connected to one side of the top of the connecting plate, a limit block fixed to the inner side of the washer, an elastic sheet provided at the bottom of the washer, limit grooves opened on both sides of the screw rod, and an internal hexagonal groove opened on the top of the nut, with a sealing sheet connected to the lower part of the internal hexagonal groove via a spring.

[0006] Furthermore, a rubber pad is provided at the edge of the sealing sheet, and the rubber pad is in contact with the inner wall of the internal hexagonal groove.

[0007] By adopting the above technical solution, outdoor dirt, stones and other impurities can be effectively blocked from entering the internal hexagonal groove, avoiding the problem of hexagonal wrenches being unable to be inserted due to impurities. At the same time, the elasticity of the rubber can enhance the sealing effect, reduce corrosion in the groove, and ensure the ease of disassembly and service life of the bolts in harsh environments.

[0008] Furthermore, the elastic sheet is provided in several groups, and the several groups of elastic sheets are distributed in a ring shape at equal intervals.

[0009] By adopting the above technical solution, the elastic sheets are distributed in a ring shape at equal intervals, which can form a 360° pressure coverage without dead angles on the rotation trajectory of the positioning bolt, ensuring that no matter what angle the positioning bolt rotates to, it can accurately contact one of the elastic sheets and form a stable pressure.

[0010] Furthermore, the gasket is made of spring steel, and several sets of elastic sheets are all in a sloping shape.

[0011] By adopting the above technical solution, when the positioning bolt is pressed, the slope surface can guide the elastic sheet to produce uniform and controllable elastic deformation, while the spring steel can stably maintain the locking state after deformation.

[0012] Furthermore, both the limiting block and the limiting groove are provided in two sets, and the two sets of limiting blocks and the two sets of limiting grooves are in sliding cooperation.

[0013] By adopting the above technical solution, the relative displacement between the gasket and the screw is limited, and the gasket is prevented from rotating circumferentially or shifting axially during installation, tightening and vibration.

[0014] Furthermore, the spring is made of manganese steel.

[0015] By adopting the above technical solutions, manganese steel has far superior wear resistance and aging resistance compared to ordinary steel, which can significantly extend the service life of springs and avoid the problem of frequent component replacement due to spring damage.

[0016] Furthermore, the bottom of the nut is provided with an anti-loosening washer, which is made of silicone rubber.

[0017] By adopting the above technical solution, the high elasticity and high coefficient of friction of silicone rubber are utilized to ensure that the anti-loosening gasket fits tightly against the equipment surface when the nut is tightened, thereby enhancing the anti-loosening reliability under vibration conditions.

[0018] Furthermore, the screw and nut are integrally formed, and the nut is hexagonal prism-shaped.

[0019] By adopting the above technical solutions, the one-piece molding improves the overall load-bearing capacity of the bolt, and the hexagonal columnar nut can be used with open-end wrenches, rather than being limited to hexagonal wrenches, further improving the ease of operation.

[0020] In summary, the present invention has the following main advantages:

[0021] 1. This utility model incorporates a spring and a sealing plate. During operation, the operator applies pressure to the sealing plate with a hex wrench, causing the sealing plate to overcome the elasticity of the spring and retract into the inner hexagonal groove. This allows for the installation or removal of bolts. After the operation is completed, the spring pushes the sealing plate back to its original position, thus sealing the inner hexagonal groove. This prevents stones from getting stuck in the hexagonal hole and causing the hexagonal wrench to be unable to be inserted, making the operation more convenient.

[0022] 2. This utility model, by incorporating a gasket, a limiting block, a limiting groove, a positioning bolt, and an elastic sheet, allows for precise alignment of the gasket's limiting block with the limiting groove on the screw during installation. This allows for quick gasket positioning. Once the nut and screw are engaged and locked to a certain extent, the positioning bolt forms a stable pressure against the elastic sheet, causing it to undergo adaptive elastic deformation. This, in turn, creates a continuous reverse locking force on the nut. This structure effectively prevents the nut from jumping along the screw axis or reversing due to vibration, completely solving the problem of loosening in traditional bolt connections. When the nut needs to be removed, the operator only needs to use a regular screwdriver to unscrew the positioning bolt, releasing its pressure constraint on the elastic sheet. At this point, the elastic sheet returns to its natural state, and the locking relationship between the nut and screw is simultaneously released. The nut can then be easily unscrewed in a conventional manner without damaging the gasket structure. This allows the gasket to be reused, reducing unnecessary material waste. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the gasket structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the screw structure of this utility model;

[0026] Figure 4 This is a schematic diagram of the nut structure of this utility model;

[0027] Figure 5 This is a schematic diagram of the cross-sectional structure of the screw of this utility model.

[0028] In the diagram: 1. Screw; 2. Nut; 3. Nut; 4. Washer; 5. Limiting groove; 6. Connecting disc; 7. Positioning bolt; 8. Elastic sheet; 9. Socket hexagonal groove; 10. Spring; 11. Sealing sheet; 12. Limiting block; 13. Anti-loosening washer. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] The embodiments of this utility model will be described below based on its overall structure.

[0031] Example 1: A locking screw assembly, such as Figures 1-5 As shown, the device includes a screw 1, with a nut 2 fixed to the top of the screw 1. The screw 1 and nut 2 are integrally formed, and the nut 2 is hexagonal prism-shaped. The integral forming improves the overall load-bearing capacity of the bolt, and the hexagonal prism-shaped nut 2 can accommodate open-end wrenches, rather than being limited to hexagonal wrenches, further improving ease of operation. The outer surface of the screw 1 is provided with a nut 3 and a washer 4. The top of the nut 3 is provided with a connecting plate 6, and a positioning bolt 7 is threadedly connected to one side of the top of the connecting plate 6. A limit block 12 is fixed to the inner side of the washer 4, and a spring is provided at the bottom of the washer 4. The screw 1 has limit grooves 5 on both sides, and the nut 2 has an internal hexagonal groove 9 on the top. A sealing plate 11 is connected to the lower part of the internal hexagonal groove 9 by a spring 10. The edge of the sealing plate 11 is provided with a rubber pad, and the rubber pad contacts the inner wall of the internal hexagonal groove 9. This can effectively prevent outdoor dirt, stones and other impurities from entering the internal hexagonal groove 9, avoiding the problem of hexagonal wrenches being unable to be inserted due to impurities. At the same time, the elasticity of the rubber can enhance the sealing effect, reduce corrosion in the groove, and ensure the convenience of bolt disassembly and service life in harsh environments.

[0032] See Figures 1-2 In the above embodiment, the elastic sheet 8 is provided in several groups, and the several groups of elastic sheets 8 are distributed in a ring shape at equal intervals. The elastic sheet 8 is distributed in a ring shape at equal intervals, which can form a 360° pressure coverage without dead angles on the rotation trajectory of the positioning bolt 7, ensuring that no matter what angle the positioning bolt 7 rotates to, it can accurately contact one of the groups of elastic sheets 8 and form a stable pressure.

[0033] See Figures 1-2 In the above embodiment, the gasket 4 is made of spring steel 10, and several sets of elastic plates 8 are all in a sloping shape. When the positioning bolt 7 presses against it, the sloping surface can guide the elastic plates 8 to produce uniform and controllable elastic deformation, while the spring steel 10 can stably maintain the locked state after deformation.

[0034] See Figure 1 , Figure 2 , Figure 3 and Figure 5 In the above embodiment, the limiting block 12 and the limiting groove 5 are provided in two sets, and the two sets of limiting blocks 12 and the two sets of limiting grooves 5 are slidably engaged, thereby limiting the relative displacement between the gasket 4 and the screw 1, and preventing the gasket 4 from rotating circumferentially or shifting axially during installation, locking and vibration.

[0035] See Figure 5 In the above embodiments, the spring 10 is made of manganese steel. Manganese steel has better wear resistance and anti-aging properties than ordinary steel, which can greatly extend the service life of the spring 10 and avoid the problem of frequent component replacement due to damage to the spring 10.

[0036] Example 2: To further improve the anti-loosening effect of bolts, Example 2 is an improvement on Example 1. (See attached document for details.) Figure 1 and Figure 5 The bottom of the nut 2 is provided with an anti-loosening washer 13, which is made of silicone rubber. Utilizing the high elasticity and high coefficient of friction of silicone rubber, the anti-loosening washer 13 is tightly attached to the surface of the equipment when the nut 2 is tightened, thereby enhancing the anti-loosening reliability under vibration conditions.

[0037] The implementation principle of this utility model is as follows: During installation, the operator first passes the screw 1 through the automotive component to be fixed. Then, the operator precisely positions the gasket 4 through the cooperation of the limiting block 12 and the limiting groove 5, and then fits the gasket 4 onto the screw 1. Next, the operator rotates the nut 3 to engage and lock it with the screw 1. During the process of tightening the nut 3 to the preset degree, the positioning bolt 7 will press against the elastic plate 8, causing the elastic plate 8 to deform and form a continuous reverse locking force on the nut 3, effectively preventing the nut 3 from jumping along the axis of the screw 1 or reversing due to vibration. The sealing plate 1 in the internal hexagonal groove 9... 1. Under the action of spring 10, the sealing plate 11 is normally kept in a sealed state. When the operator uses a hex wrench, the wrench applies pressure to the sealing plate 11, causing the sealing plate 11 to overcome the elastic force of spring 10 and retract into the inner hexagonal groove 9. After the operation is completed, spring 10 pushes the sealing plate 11 to return to its original position, forming a tight seal with the rubber pad on the edge of the sealing plate 11, preventing outdoor dirt, stones and other impurities from entering the inner hexagonal groove 9. When disassembling, the operator only needs to use a regular screwdriver to unscrew the positioning bolt 7, and the elastic plate 8 will return to its natural state, releasing the locking constraint on the nut 3. Then the operator can unscrew the nut 3 in the usual way.

[0038] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A locking screw assembly, comprising a screw (1), characterized in that: The top of the screw (1) is fixed with a nut (2), the outer surface of the screw (1) is provided with a nut (3) and a washer (4), the top of the nut (3) is provided with a connecting plate (6), and the top side of the connecting plate (6) is threaded with a positioning bolt (7), the inner side of the washer (4) is fixed with a limit block (12), the bottom of the washer (4) is provided with an elastic plate (8), the two sides of the screw (1) are provided with limit grooves (5), the top of the nut (2) is provided with an internal hexagonal groove (9), and the lower part of the internal hexagonal groove (9) is connected to a sealing plate (11) by a spring (10).

2. The locking screw assembly according to claim 1, characterized in that: The sealing sheet (11) has a rubber pad at its edge, and the rubber pad is in contact with the inner wall of the internal hexagonal groove (9).

3. The locking screw assembly according to claim 1, characterized in that: The elastic sheet (8) is provided in several groups, and the several groups of elastic sheets (8) are distributed in a ring shape at equal intervals.

4. The locking screw assembly according to claim 3, characterized in that: The gasket (4) is made of spring steel, and several sets of elastic sheets (8) are all in a sloping shape.

5. The locking screw assembly according to claim 1, characterized in that: The limiting block (12) and the limiting groove (5) are provided in two sets, and the two sets of limiting blocks (12) and the two sets of limiting grooves (5) are slidably engaged.

6. The locking screw assembly according to claim 1, characterized in that: The spring (10) is made of manganese steel.

7. The locking screw assembly according to claim 1, characterized in that: The bottom of the nut (2) is provided with an anti-loosening washer (13), which is made of silicone rubber material.

8. The locking screw assembly according to claim 1, characterized in that: The screw (1) and the nut (2) are integrally formed, and the nut (2) is a hexagonal column.

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