High-strength double-nut lock bolt for high-speed rail main shaft

Abstract

The utility model provides a high-strength double-nut lock bolt for a high-speed rail main shaft, which belongs to the field of bolt processing and comprises a bolt main body, two fixing nuts are arranged on the bolt main body, a lock part is arranged between the fixing nuts and the bolt main body, and a coating component is arranged on the surface of the bolt main body. The first gasket and the second gasket generate a wedge-shaped effect between the fixing nuts, so that fastening between the two sets of fixing nuts and fastening between the fixing nuts and a part to be fixed do not depend on friction, any rotation of the fixing nuts after sedimentation can be prevented, the double-nut design is adopted, the upper fixing nut and the lower fixing nut are connected through the concave-convex portion, and the fixing nuts are not prone to falling off. Therefore, great friction force is generated between the bolt main body and the fixing nut, and looseness is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to bolt processing field, specifically, high -strength double nut anti -loose bolt for high -speed rail main shaft. BACKGROUND

[0002] High -speed rail main shaft requires bolt extremely, need to have high strength, good anti -loose performance and reliable durability to ensure stability and safety in the process of high -speed rail operation.

[0003] However, the existing bolt has the problems of poor anti-loose performance, easy loosening and the like, and it is difficult to meet the long-term operation demand of high-speed rail, and may be loosened due to long-time use or vibration and the like, so that the connecting piece loses the fastening effect, and if the material quality of the anti-loose bolt used is poor, brittle fracture or deformation may occur.

[0004] Therefore, we improve it and propose high-strength double nut anti-loose bolt for high-speed rail main shaft. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at the problems of poor anti-loose performance, easy loosening and poor material quality, and possible brittle fracture or deformation.

[0006] In order to realize the above-mentioned utility model purposes, the utility model provides the following technical scheme:

[0007] High-strength double nut anti-loose bolt for high-speed rail main shaft is used to improve the above-mentioned problems.

[0008] The utility model is as follows:

[0009] The utility model discloses a bolt main body is provided with two fixed nuts, the fixed nut and the bolt main body between setting has the anti -loose spare, the surface of bolt main body is provided with coating assembly.

[0010] The anti-loose spare includes first gasket, second gasket, cooperation groove and fastening groove, the first gasket and second gasket are two two a group, and are located between the fixed nut and the fixed spare, the cooperation groove is opened in the side of mutual contact of first gasket and second gasket, the fastening groove is opened on the other side opposite cooperation groove of first gasket and second gasket, and a pair of first gasket and second gasket are arranged between the fixed spare and the fixed nut.

[0011] As the preferred technical scheme of the utility model, the surface of the bolt main body is provided with two groups of threads, and the rotation directions of the two groups of threads are opposite, the number of the fixed nuts is two groups, and the specifications of the two groups of fixed nuts are the same.

[0012] As the preferred technical scheme of the utility model, the angle of the matching groove is larger than the thread angle of the bolt body, and the fastening grooves are toothed oppositely on the first gasket and the second gasket.

[0013] As the preferred technical scheme of the utility model, the coating assembly comprises a Teflon coating, an oxidation layer, a sealing layer and an alloy layer, and the Teflon coating, the oxidation layer, the sealing layer and the alloy layer are all covered on the surface of the bolt body.

[0014] As the preferred technical scheme of the utility model, the Teflon coating is sprayed on the surface of the bolt body and is combined with the surface of the bolt body through physical adsorption and mechanical engagement.

[0015] As the preferred technical scheme of the utility model, the oxidation layer adopts iron oxide, forms an oxide film on the surface of the Teflon layer through chemical oxidation, the sealing layer adopts epoxy resin and forms a continuous protective layer by physically filling the pores of the oxidation layer.

[0016] As the preferred technical scheme of the utility model, the alloy layer adopts a nickel-based high-temperature alloy and is tightly combined with the sealing layer through mechanical engagement to form a continuous and dense corrosion-resistant protective layer.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] In the scheme of the utility model,

[0019] 1. The anti-loosening piece is arranged, the first gasket and the second gasket produce a wedge effect between the fixed nuts, the fastening between the two groups of fixed nuts and between the fixed nuts and the to-be-fixed piece is not dependent on friction, any rotation of the fixed nuts after sinking can be prevented, the double-nut design is adopted, the upper and lower fixed nuts are connected through concave-convex parts, great friction between the bolt body and the fixed nuts is produced, and loosening is effectively prevented.

[0020] 2. Meanwhile, the Teflon coating hardly reacts to acid, alkali and salt corrosion media, can reduce friction during bolt installation, the oxidation layer can effectively isolate oxygen and water, improve corrosion resistance, has high stability, is not easy to decompose at high temperature, the sealing layer improves the overall density, promotes the combination between the layers, the alloy layer is not easy to deform or break, and has good resistance to various corrosion media, including oxidizing media, reducing media and salt spray environment. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The utility model provides a high-strength double-nut anti-loosening bolt for a high-speed rail main shaft, and a structure schematic view of the high-strength double-nut anti-loosening bolt is shown in the figure.

[0022] Figure 2 The utility model provides a high-strength double-nut anti-loosening bolt for a high-speed rail main shaft, and a main body structure schematic view of the high-strength double-nut anti-loosening bolt is shown in the figure.

[0023] Figure 3 The first gasket and the second gasket structure schematic diagram of the high-strength double-nut anti-loose bolt for the high-speed rail main shaft are provided in the utility model;

[0024] Figure 4 The first gasket and the second gasket structure schematic diagram of the high-strength double-nut anti-loose bolt for the high-speed rail main shaft are provided in the utility model;

[0025] Figure 5 The coating assembly enlarged structure schematic diagram of the high-strength double-nut anti-loose bolt for the high-speed rail main shaft is provided in the utility model.

[0026] Indicated in the figure:

[0027] 1, bolt main body;2, fixed nut;3, anti-loose piece;4, coating assembly;301, first gasket;302, second gasket;303, matching groove;304, fastening groove;401, Teflon coating;402, oxidation layer;403, hole sealing layer;404, alloy layer. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments.

[0029] Therefore, the following detailed description of the embodiments of the utility model is not intended to limit the scope of the claimed utility model, but only represents some embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0030] It should be noted that the embodiments in the utility model and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0031] It should be noted that: similar labels and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] As Figures 1-5 shown, the present embodiment proposes a high-strength double-nut anti-loose bolt for a high-speed rail main shaft, which comprises a bolt main body 1, two fixed nuts 2 are arranged on the bolt main body 1, an anti-loose piece 3 is arranged between the fixed nut 2 and the bolt main body 1, and a coating assembly 4 is arranged on the surface of the bolt main body 1.

[0033] The anti-loosening piece 3 comprises first gaskets 301, second gaskets 302, matching grooves 303 and fastening grooves 304, the first gaskets 301 and the second gaskets 302 are in pairs, located between the fixing nuts 2 and the parts to be fixed, the matching grooves 303 are arranged on the side where the first gaskets 301 and the second gaskets 302 contact each other, the fastening grooves 304 are arranged on the other side of the first gaskets 301 and the second gaskets 302 opposite to the matching grooves 303, and a pair of first gaskets 301 and second gaskets 302 are arranged between the parts to be fixed and the fixing nuts 2 in pairs.

[0034] As shown in Figure 1 , the surface of the bolt body 1 is provided with two groups of threads, the rotation directions of the two groups of threads are opposite, the number of the fixing nuts 2 is two, and the specifications of the two groups of fixing nuts 2 are the same.

[0035] As shown in Figure 1 , the inclination angle of the matching grooves 303 is greater than the thread angle of the bolt body 1, and the tooth shapes of the fastening grooves 304 on the first gaskets 301 and the second gaskets 302 are opposite. The bolt body 1 and the parts to be fixed are connected and fixed by the two groups of fixing nuts 2, the first gaskets 301 and the second gaskets 302, and since the inclination angle of the matching grooves 303 is greater than the thread angle of the bolt body 1, the first gaskets 301 and the second gaskets 302 produce a wedge effect under the fixing nuts 2, which can prevent any rotation of the fixing nuts 2 after settlement.

[0036] As shown in Figure 5 , the coating assembly 4 comprises a Teflon coating 401, an oxidation layer 402, a sealing layer 403 and an alloy layer 404, and the Teflon coating 401, the oxidation layer 402, the sealing layer 403 and the alloy layer 404 all cover the surface of the bolt body 1.

[0037] As shown in Figure 5 , the Teflon coating 401 is sprayed on the surface of the bolt body 1 and is combined with the surface of the bolt body 1 through physical adsorption and mechanical engagement.

[0038] As shown in Figure 5 , the oxidation layer 402 adopts iron oxide, and an oxide film is formed on the surface of the Teflon layer through chemical oxidation, the sealing layer 403 adopts epoxy resin, and a continuous protective layer is formed by physically filling the pores of the oxidation layer 402.

[0039] As shown in Figure 5As shown, the alloy layer 404 adopts a nickel-based high-temperature alloy, is tightly combined with the sealing layer 403 through mechanical engagement, and forms a continuous and dense corrosion-resistant protective layer. The Teflon coating 401 is almost not reactive to acid, alkali, salt and other corrosive media, can reduce friction during bolt installation, the oxidation layer 402 can effectively isolate oxygen and water, improve corrosion resistance, has high stability, is not easy to decompose at high temperature, the sealing layer 403 improves the overall density and promotes the combination between layers, the alloy layer 404 is not easy to deform or break, and shows good resistance to various corrosive media, including oxidizing media, reducing media and salt spray environment.

[0040] Specifically, the high-strength double-nut anti-loose bolt for the high-iron main shaft is used as follows: the bolt body 1 penetrates through the main shaft, and then the first gasket 301, the second gasket 302 and the two groups of fixing nuts 2 are sequentially installed on the bolt body 1. Since the rotation directions of the two groups of threads on the bolt body 1 are opposite, the two groups of fixing nuts 2 are not easy to fall off from the bolt body 1. The two groups of fixing nuts 2, the first gasket 301 and the second gasket 302 connect and fix the bolt body 1 and the to-be-fixed part. Since the inclination angle of the matching groove 303 is greater than the thread angle of the bolt body 1, the first gasket 301 and the second gasket 302 generate a wedge effect below the fixing nut 2, which can prevent the fixing nut 2 from rotating after settlement. Meanwhile, the Teflon coating 401 is almost not reactive to acid, alkali, salt and other corrosive media, can reduce friction during bolt installation, the oxidation layer 402 can effectively isolate oxygen and water, improve corrosion resistance, has high stability, is not easy to decompose at high temperature, the sealing layer 403 improves the overall density and promotes the combination between layers, the alloy layer 404 is not easy to deform or break, and shows good resistance to various corrosive media, including oxidizing media, reducing media and salt spray environment.

[0041] All the technical features in the embodiment can be freely combined according to actual needs.

[0042] The above embodiment is a preferred implementation scheme of the utility model, and the utility model can also be implemented in other ways. Any obvious replacement without departing from the technical scheme concept is within the protection scope of the utility model.

Claims

1. A high-strength double-nut anti-loose bolt for high-speed rail spindle, comprising a bolt body (1), characterized in that, The bolt body (1) is provided with two fixing nuts (2), the fixing nuts (2) and the bolt body (1) are provided with anti-loosening pieces (3), and the surface of the bolt body (1) is provided with a coating assembly (4); The anti-loosening pieces (3) comprise first washers (301), second washers (302), matching grooves (303) and fastening grooves (304), the first washers (301) and the second washers (302) are in pairs, are located between the fixing nuts (2) and the parts to be fixed, the matching grooves (303) are arranged on the side, where the first washers (301) and the second washers (302) contact each other, of the first washers (301) and the second washers (302), and the fastening grooves (304) are arranged on the other side, where the first washers (301) and the second washers (302) are opposite to the matching grooves (303), of the first washers (301) and the second washers (302), and a pair of first washers (301) and second washers (302) are arranged between the parts to be fixed and the fixing nuts (2) in pairs.

2. The high-strength double-nut anti-loose bolt for high-speed rail spindle according to claim 1, characterized in that, The surface of the bolt body (1) is provided with two groups of threads, the rotation directions of the two groups of threads are opposite, the number of the fixing nuts (2) is two, and the specifications of the two groups of fixing nuts (2) are the same.

3. The high-strength double-nut lock bolt for high-speed rail spindle according to claim 1, characterized in that, The inclination angle of the matching grooves (303) is greater than the thread angle of the bolt body (1), and the tooth shapes of the fastening grooves (304) on the first washers (301) and the second washers (302) are opposite.

4. The high-strength double-nut lock bolt for high-speed rail main shaft according to claim 1, characterized in that, The coating assembly (4) comprises a Teflon coating (401), an oxidation layer (402), a sealing layer (403) and an alloy layer (404), and the Teflon coating (401), the oxidation layer (402), the sealing layer (403) and the alloy layer (404) cover the surface of the bolt body (1).

5. The high-strength double-nut anti-loose bolt for high-speed rail spindle according to claim 4, characterized in that, The Teflon coating (401) is sprayed on the surface of the bolt body (1) and is combined with the surface of the bolt body (1) through physical adsorption and mechanical engagement.

6. The high-strength double-nut anti-loose bolt for high-speed rail spindle according to claim 4, characterized in that, The oxidation layer (402) adopts iron oxide, forms an oxide film on the surface of the Teflon layer through chemical oxidation, the sealing layer (403) adopts epoxy resin, fills the pores of the oxidation layer (402) through physical filling, and forms a continuous protective layer.

7. The high-strength double-nut anti-loose bolt for high-speed rail spindle according to claim 4, characterized in that, The alloy layer (404) adopts a nickel-based high-temperature alloy, is tightly combined with the sealing layer (403) through mechanical engagement, and forms a continuous, dense and corrosion-resistant protective layer.

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