Anti-loosening bolt fixing piece

Abstract

The utility model discloses an anti-loosening bolt fixing piece in the field of fixing assemblies. The anti-loosening bolt fixing piece comprises a bolt body, a springback assembly and a limiting ring. The bolt main body comprises a screw rod, a nut and an abutting plate; the screw rod and the nut are integrally connected, an abutting plate is arranged below the nut, external threads are arranged on the screw rod below the abutting plate, and a gap is reserved between the abutting plate and the nut; the springback assembly is arranged in the gap between the abutting plate and the nut and comprises a compression spring and a limiting plate, one end of the compression spring is connected to the bottom of the nut, the other end of the compression spring is connected with the limiting plate, and a cross-shaped protrusion is arranged on the other face of the limiting plate; and the limiting ring is fixedly arranged on the periphery of the fixing hole, the interior of the limiting ring is hollow, and a cross-shaped groove matched with the cross-shaped protrusion is formed in the limiting ring. The telescopic limiting plate is matched with the limiting ring, when the bolt rotates, the cross-shaped protrusion can abut against the cross-shaped groove, and then the bolt is prevented from loosening.

Description

Technical Field

[0001] The utility model relates to the field of fixing parts, in particular to an anti-loosening bolt fixing part. Background Art

[0002] In many engineering and mechanical applications, the stability and safety of bolted connections are critical. However, due to the possible tooth clearance between the screw and the nut, as well as the influence of single-sided friction, the bolts may loosen under vibration or long-term load, which not only affects the performance of the machinery, but may also cause safety accidents.

[0003] At present, the most commonly used anti-loosening technology is physical anti-loosening glue. Although this glue can form the screw and the fastener into a whole, it also has the following disadvantages: 1. There are many working temperature restrictions: the maximum working temperature of many physical anti-loosening glues is limited to about 120°C;

[0004] 2. Difficulty in reassembly: If the bolt needs to be disassembled and reassembled, physical anti-loosening glue may become an obstacle. Because the glue will adhere to the thread, it will make disassembly difficult and may damage the bolt or thread during reassembly. Therefore, it is urgent to provide a bolt fastener that is easy to use. Utility Model Content

[0005] The utility model aims to provide an anti-loosening bolt fixing part which has high stability and will not loosen.

[0006] The purpose of the utility model is achieved as follows: an anti-loosening bolt fixing part comprises a bolt body, a rebound component, and a limiting ring;

[0007] A bolt body, the bolt body comprising a screw rod, a nut and a contact plate; the screw rod and the nut are connected as one body, a contact plate is provided below the nut, an external thread is provided on the screw rod below the contact plate, and a gap is left between the contact plate and the nut;

[0008] A rebound component is arranged in the gap between the abutment plate and the nut, the rebound component comprises a compression spring and a limit plate, one end of the compression spring is connected to the bottom of the nut, and the other end is connected to the limit plate, and the other side of the limit plate is provided with a cross protrusion;

[0009] The limiting ring is fixedly arranged on the periphery of the fixing hole. The limiting ring is hollow inside and is provided with a cross groove matching the cross protrusion.

[0010] Preferably, the inner diameter of the limiting ring is larger than the diameter of the fixing hole, and the diameter of the abutment plate is smaller than the inner diameter of the limiting ring and larger than the diameter of the fixing hole.

[0011] Preferably, when the screw is rotated downward until the abutment plate abuts against the outer surface of the fixing hole, the distance from the nut to the top of the limiting ring is smaller than the sum of the maximum travel of the compression spring and the height of the limiting plate.

[0012] Preferably, when the screw is rotated downward until the abutment plate abuts against the outer surface of the fixing hole, the distance from the nut to the top of the limiting ring is greater than the sum of the minimum stroke of the compression spring after being compressed and the height of the limiting plate.

[0013] Preferably, extension plates are provided on both sides of the limiting plate.

[0014] Preferably, the limiting ring is connected to the periphery of the fixing hole by welding.

[0015] Compared with the prior art, the utility model is beneficial in that:

[0016] 1. A spring-type retractable limit plate is used, so that after the bolt is fixed, the limit plate and the external limit ring are fixed to ensure that when the bolt body rotates, the cross protrusion of the limit plate and the cross groove will conflict with each other, further preventing the bolt from rotating and loosening;

[0017] 2. Set the limit plate and control the distance from the limit plate to the nut, the travel of the return spring and other variables to ensure that the limit plate can cooperate with the cross slot through the free expansion and contraction margin of the spring;

[0018] 3. An extension plate is provided to facilitate clamping of the bolts and compression of the spring during installation, thereby improving the efficiency of installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Among them, 1 bolt body, 101 screw rod, 102 nut, 103 contact plate, 2 rebound assembly, 201 compression spring, 202 limit plate, 2021 cross protrusion, 2022 extension plate, 3 limit ring, 301 cross groove, DETAILED DESCRIPTION

[0021] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0022] It should be noted that in the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. Terms such as "horizontal", "vertical", and "overhanging" do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] like Figure 1 As shown, an anti-loosening bolt fixing part includes a bolt body 1, a rebound component 2, and a limiting ring 3;

[0025] Bolt body 1, the bolt body includes a screw rod 101, a nut 102, and a contact plate 103; the screw rod 101 and the nut 102 are connected as one body, a contact plate 103 is provided below the nut 102, an external thread is provided on the screw rod 101 below the contact plate 103, a gap is left between the contact plate 103 and the nut 102, and the screw rod is rotatably connected to the fixing hole through the thread;

[0026] The rebound component 2 is arranged in the gap between the abutment plate 103 and the nut 102. The rebound component 2 includes a compression spring 201 and a limit plate 202. One end of the compression spring 201 is connected to the bottom of the nut 102, and the other end is connected to the limit plate 202. The limit plate 202 has a cross protrusion 2021 on the other side.

[0027] The limiting ring 3 is fixedly arranged on the periphery of the fixing hole. The limiting ring 3 is hollow inside and has a cross groove 301 matching the cross protrusion 2021. After the cross protrusion matches the cross groove, when the bolt rotates loose, the matched cross protrusion and the cross groove will generate resistance to prevent loosening.

[0028] like Figure 1 As shown, the inner diameter of the limiting ring 3 is larger than the diameter of the fixing hole, the diameter of the abutment plate 103 is smaller than the inner diameter of the limiting ring 3 and larger than the diameter of the fixing hole, and the abutment plate can pass through the inner diameter of the limiting ring and can abut against the periphery of the fixing hole.

[0029] like Figure 1 As shown, when the screw 101 rotates downward until the contact plate 103 contacts the outer surface of the fixing hole, the distance from the nut 102 to the top of the limit ring 3 is smaller than the sum of the maximum stroke of the compression spring 201 and the height of the limit plate 202, ensuring that the limit plate can match the cross groove of the limit ring when the spring is fully extended.

[0030] like Figure 1 As shown, when the screw 101 rotates downward until the contact plate 103 contacts the outer surface of the fixing hole, the distance from the nut 102 to the top of the limit ring 3 is greater than the sum of the minimum stroke of the compression spring 201 after being compressed and the height of the limit plate 202, ensuring that the limit plate can be separated from the cross groove of the limit ring when the spring is fully contracted.

[0031] like Figure 1 As shown, extension plates 2022 are provided on both sides of the limit plate 202. During the initial installation, there is no need to hold the extension plate. When the screw is rotated until the limit plate and the limit ring are about to collide, press the limit plate toward the nut side and rotate the screw at the same time until the contact plate and the fixing hole collide and then release it. The extension plate facilitates the extrusion of the spring.

[0032] like Figure 1 As shown, the connection method between the limiting ring 3 and the periphery of the fixing hole is welding. When the limiting ring is in a fixed state, it can form a conflict with the limiting plate to ensure that the bolt will not rotate.

[0033] The working principle of the utility model is explained as follows: when in use, the limit ring is fixed to the periphery of the fixing hole, and then the screw is inserted into the fixing hole and rotated. When the screw is rotated to the point where the limit plate and the limit ring are about to collide, the limit plate is pressed toward one side of the nut, and the screw is rotated at the same time until the contact plate and the fixing hole collide and then loosen; when there is a slight deviation when the cross protrusion corresponds to the cross groove, the correspondence can be achieved by rotating the torsion spring, thereby further realizing the function of preventing the screw from loosening.

[0034] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary personnel in the field to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents of the present invention for protection have been fully recorded in the claims.

Claims

1. An anti-loosening bolt fixing, characterized in that: It includes a bolt body, a rebound component, and a limit ring; A bolt body, the bolt body comprising a screw rod, a nut and a contact plate; the screw rod and the nut are connected as one body, a contact plate is provided below the nut, an external thread is provided on the screw rod below the contact plate, and a gap is left between the contact plate and the nut; A rebound component is arranged in the gap between the abutment plate and the nut, the rebound component comprises a compression spring and a limit plate, one end of the compression spring is connected to the bottom of the nut, and the other end is connected to the limit plate, and the other side of the limit plate is provided with a cross protrusion; The limiting ring is fixedly arranged on the periphery of the fixing hole. The limiting ring is hollow inside and is provided with a cross groove matching the cross protrusion.

2. The anti-loosening bolt fixing according to claim 1, characterized in that: The inner diameter of the limiting ring is larger than the diameter of the fixing hole, and the diameter of the abutment plate is smaller than the inner diameter of the limiting ring and larger than the diameter of the fixing hole.

3. The anti-loosening bolt fixing according to claim 1, characterized in that: When the screw is rotated downward until the abutment plate abuts against the outer surface of the fixing hole, the distance from the nut to the top of the limiting ring is less than the sum of the maximum travel of the compression spring relaxation and the height of the limiting plate.

4. The anti-loosening bolt fixing according to claim 1, characterized in that: When the screw is rotated downward until the abutment plate abuts against the outer surface of the fixing hole, the distance from the nut to the top of the limiting ring is greater than the sum of the minimum stroke of the compression spring after being compressed and the height of the limiting plate.

5. The anti-loosening bolt fixing according to claim 1, characterized in that: Extension plates are arranged on both sides of the limiting plate.

6. The anti-loosening bolt fixing member according to claim 1, characterized in that: The limiting ring is connected to the periphery of the fixing hole by welding.

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