Rust-proof fastening bolt for automobile hub

Abstract

The utility model provides a rust-proof fastening bolt for an automobile hub, which belongs to the field of bolt processing and comprises a bolt main body, one end of the bolt main body, which is positioned at a nut, is provided with a protection mechanism, and the surface of the bolt main body is provided with a protection coating. When the bolt is used, the protection end cover is installed in the containing groove, the reset spring is compressed downwards till the limiting clamping block corresponds to the annular clamping groove, and after the limiting clamping block is clamped at the opening of the annular clamping groove, the protection end cover is rotated to enable the limiting clamping block not to pop out of the annular clamping groove, so that the end of the bolt body is protected; and meanwhile, when the protective end cover is taken down, only the protective end cover needs to be rotated, so that the limiting clamping block corresponds to the opening of the annular clamping groove, and the protective end cover is automatically popped out by the reset spring.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of bolt processing, specifically, relates to a rustproof fastening bolt for automobile wheel hub. BACKGROUND

[0002] The automobile wheel hub bolt is a key component for connecting the wheel and the vehicle body, and its performance and reliability are crucial for driving safety. With the rapid development of the automobile industry, the market scale of the wheel hub bolt continues to expand. However, the bolt may be subjected to alternating loads during vehicle operation, leading to fatigue fracture.

[0003] (1) The existing automobile wheel hub is generally directly exposed to the outside world after being fixed by the bolt, often in contact with rainwater and air. Under the oxidation of external oxygen, the bolt is prone to rust, posing a safety hazard.

[0004] (2) The bolt surface may be coated with a rust-proof layer, but the rust-proof layer may fall off during the connection process, causing the bolt to rust. In addition, cast iron bolts are prone to rust, even though they are coated with a protective paint. However, the paint surface wears and fades over time, easily causing rust.

[0005] Therefore, we improve it and propose a rustproof fastening bolt for automobile wheel hub. SUMMARY

[0006] The utility model aims at the existing problems that the bolt is directly exposed to the outside world, easily oxidized, and the bolt surface may be coated with a rust-proof layer, but the rust-proof layer may fall off during the connection process, causing the bolt to rust.

[0007] To achieve the above utility model purposes, the utility model provides the following technical scheme:

[0008] The rustproof fastening bolt for automobile wheel hub improves the above problems.

[0009] The utility model is as follows:

[0010] It comprises a bolt body, a protection mechanism is arranged at one end of the nut of the bolt body, and a protective coating is arranged on the surface of the bolt body.

[0011] The protection mechanism comprises a placing groove, a reset spring, a protective end cover, an annular clamping groove, and a limiting clamping block. The placing groove is opened at one end of the nut of the bolt body, one end of the placing groove is through the nut end of the bolt body, one end of the reset spring is fixedly connected to the bottom end of the placing groove, one end of the protective end cover is sleeved in the reset spring, the large end surface cooperates with one end of the bolt body, the annular clamping groove is opened at one end of the nut of the bolt body, and the limiting clamping block is welded at the edge of the protective end cover and corresponds to the opening of the annular clamping groove.

[0012] As the preferred technical scheme of the utility model, the nut one end of the bolt main part is equipped with oil injection hole, the number of oil injection hole is four groups, along the bolt main part circumference distribution.

[0013] As the preferred technical scheme of the utility model, the nut one end of the bolt main part is equipped with oil injection hole, the number of oil injection hole is four groups, along the bolt main part circumference distribution.

[0014] As the preferred technical scheme of the utility model, the surface of the protective end cover is equipped with convenient recess, and one end of the bolt main part is provided with a sealing pad.

[0015] As the preferred technical scheme of the utility model, the protective coating includes oxidation layer and filling layer, and the oxidation layer and the filling layer are coated on the surface of the suspension bolt main part.

[0016] As the preferred technical scheme of the utility model, the oxidation layer adopts aluminum oxide material, and an oxide film is formed on the surface of the bolt main part by anodic oxidation.

[0017] As the preferred technical scheme of the utility model, the filling layer adopts silane coupling agent, which fills the possible small pores on the surface of the plating layer and improves the overall compactness.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] In the scheme of the utility model:

[0020] 1. By setting the protection mechanism, when using, the protective end cover is installed in the placing groove, and the reset spring is compressed downward until the limiting block corresponds to the annular clamping groove, after the limiting block is clamped in the opening of the annular clamping groove, the protective end cover is rotated to make the limiting block not pop out of the annular clamping groove, so as to protect the end of the bolt main part, and when the protective end cover is removed, only the limiting block and the opening of the annular clamping groove are corresponded by rotating the protective end cover, and the reset spring automatically pops out the protective end cover.

[0021] 2. By setting the protective coating, the material can be prevented from contacting oxygen, moisture and other corrosive substances in the external environment, so as to effectively slow down or prevent the corrosion process of the material, significantly increase the surface hardness and wear resistance of the material, improve the hardness and wear resistance of the steel material, thereby prolong the service life, and the silane coupling agent fills the pores of the oxidation layer by physical filling to form a continuous protective layer and promote the combination between layers. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The utility model provides the structure schematic drawing of the automobile wheel hub rustproof fastening bolt;

[0023] Figure 2 The overall structure schematic diagram of the rust-proof fastening bolt for automobile wheel hub provided by the utility model;

[0024] Figure 3 The overall explosion structure schematic diagram of the rust-proof fastening bolt for automobile wheel hub provided by the utility model;

[0025] Figure 4 The overall cross-section structure schematic diagram of the rust-proof fastening bolt for automobile wheel hub provided by the utility model;

[0026] Figure 5 The protection coating structure schematic diagram of the rust-proof fastening bolt for automobile wheel hub provided by the utility model; Figure 4 The enlarged structure schematic diagram of A place in the middle;

[0027] Figure 6 The protection coating structure schematic diagram of the rust-proof fastening bolt for automobile wheel hub provided by the utility model;

[0028] Figure 7 The bolt main body structure schematic diagram of the rust-proof fastening bolt for automobile wheel hub provided by the utility model.

[0029] Indicated in the figure:

[0030] 1, bolt main body; 2, protection mechanism; 3, protection coating; 201, placing groove; 202, reset spring; 203, protection end cover; 204, annular clamping groove; 205, limiting clamping block; 301, oxidation layer; 302, filling layer; 4, oil injection hole; 5, cross groove; 6, convenient recess. DETAILED DESCRIPTION

[0031] 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.

[0032] 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 belong to the scope of protection of the utility model.

[0033] 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.

[0034] It should be noted that like reference numerals and letters refer to like items in the several views, and that no further definitions and explanations of defined items are required in the subsequent drawings once an item is defined in one drawing.

[0035] As shown in Figures 1-7 The present embodiment proposes a rust-proof fastening bolt for automobile wheel hub, which comprises a bolt body 1, a protection mechanism 2 arranged at one end of the nut of the bolt body 1, and a protective coating 3 arranged on the surface of the bolt body 1.

[0036] The protection mechanism 2 comprises a placing groove 201, a reset spring 202, a protective end cap 203, an annular clamping groove 204, and a limiting clamping block 205. The placing groove 201 is arranged at one end of the nut of the bolt body 1, and one end of the placing groove 201 is through the one end of the nut of the bolt body 1. One end of the reset spring 202 is fixedly connected to one end of the bottom of the placing groove 201. One end of the protective end cap 203 is sleeved in the reset spring 202, and the large end surface is matched with one end of the bolt body 1. The annular clamping groove 204 is arranged at one end of the nut of the bolt body 1. The limiting clamping block 205 is welded at the edge of the protective end cap 203 and corresponds to the opening of the annular clamping groove 204. In use, the protective end cap 203 is installed in the placing groove 201, and the reset spring 202 is compressed downward until the limiting clamping block 205 corresponds to the annular clamping groove 204. After the limiting clamping block 205 is clamped at the opening of the annular clamping groove 204, the protective end cap 203 is rotated so that the limiting clamping block 205 will not be ejected from the annular clamping groove 204, thereby protecting the end of the bolt body 1. At the same time, when the protective end cap 203 is removed, it is only necessary to rotate the protective end cap 203 so that the limiting clamping block 205 corresponds to the opening of the annular clamping groove 204, and the reset spring 202 automatically ejects the protective end cap 203.

[0037] As shown in Figure 2 and Figure 7 The nut end of the bolt body 1 is provided with four groups of oil injection holes 4 distributed along the circumference of the bolt body 1. In use, lubricating oil can be injected into the threads of the bolt body 1 through the oil injection holes 4.

[0038] As shown in Figure 7 The nut end of the bolt body 1 is provided with a cross groove 5, and the connection of the cross groove 5 is in communication with the placing groove 201, and the oil injection hole 4 is located in the inside of the cross groove 5. In use, the cross groove 5 facilitates the installation and disassembly of the bolt body 1.

[0039] As shown in Figure 4 The surface of the protective end cap 203 is provided with a convenient groove 6, and one end of the bolt body 1 is provided with a sealing gasket. The convenient groove 6 facilitates the rotation of the protective end cap 203 by the operator, and the sealing gasket ensures the sealing performance of the bolt body 1 after installation.

[0040] As Figure 6 shown, the protective coating 3 includes an oxidation layer 301 and a filling layer 302, both of which are coated on the surface of the suspension bolt body 1.

[0041] As Figure 6 shown, the oxidation layer 301 is made of aluminum oxide material, and an oxide film is formed on the surface of the bolt body 1 by anodic oxidation.

[0042] As Figure 6 shown, the filling layer 302 is made of silane coupling agent, which fills the possible small pores on the surface of the plating layer and improves the overall density.

[0043] Specifically, the automobile wheel hub rust-proof fastening bolt in use: through the oil injection hole 4, the lubricating oil is injected into the threaded part of the bolt body 1, the protective end cover 203 is installed in the placing groove 201, the reset spring 202 is compressed downward until the limiting block 205 corresponds to the annular clamping groove 204, after the limiting block 205 is clamped at the opening of the annular clamping groove 204, the protective end cover 203 is rotated so that the limiting block 205 will not be ejected from the annular clamping groove 204, so as to protect the end of the bolt body 1, at the same time, when the protective end cover 203 is removed, only the protective end cover 203 is rotated, so that the limiting block 205 corresponds to the opening of the annular clamping groove 204, the reset spring 202 automatically ejects the protective end cover 203, the oxidation layer 301 as a protective layer can prevent the material from contacting oxygen, moisture and other corrosive substances in the external environment, so as to effectively slow down or prevent the corrosion process of the material, and the sealing layer fills the pores of the oxidation layer 301 to form a continuous protective layer.

[0044] All the technical features in the embodiment can be freely combined according to actual needs.

[0045] The above embodiment is a preferred implementation scheme of the present application, in addition to this, the present application can be realized in other ways, and any obvious replacement without departing from the technical scheme concept is within the protection scope of the present application.

Claims

1. A rust-proof fastening bolt for automobile wheel hubs, comprising a bolt body (1), characterized in that, The bolt body (1) is provided with a protective mechanism (2) at one end of the nut, and the surface of the bolt body (1) is provided with a protective coating (3). The protective mechanism (2) includes a placement groove (201), a return spring (202), a protective end cap (203), an annular groove (204), and a limiting block (205). The placement groove (201) is opened at one end of the nut of the bolt body (1), and one end of the placement groove (201) is connected to one end of the nut of the bolt body (1). One end of the return spring (202) is fixedly connected to the bottom end of the placement groove (201). One end of the protective end cap (203) is fitted in the return spring (202), and the large end face is engaged with one end of the bolt body (1). The annular groove (204) is opened at one end of the nut of the bolt body (1). The limiting block (205) is welded to the edge of the protective end cap (203) and corresponds to the opening of the annular groove (204).

2. The rust-proof fastening bolt for automobile wheel hubs according to claim 1, characterized in that, The bolt body (1) has an oil injection hole (4) at one end of the nut. There are four sets of oil injection holes (4) distributed around the circumference of the bolt body (1).

3. The anti-rust fastening bolt for automobile wheel hubs according to claim 2, characterized in that, The nut end of the bolt body (1) is provided with a cross groove (5), the connection of the cross groove (5) is connected to the placement groove (201), and the oil injection hole (4) is located inside the cross groove (5).

4. The rust-proof fastening bolt for automobile wheel hubs according to claim 1, characterized in that, The protective end cap (203) has a convenient groove (6) on its surface, and a sealing gasket is provided at one end of the bolt body (1).

5. The anti-rust fastening bolt for automobile wheel hubs according to claim 1, characterized in that, The protective coating (3) includes an oxide layer (301) and a filler layer (302), both of which are coated on the surface of the bolt body (1).

6. The anti-rust fastening bolt for automobile wheel hubs according to claim 5, characterized in that, The oxide layer (301) is made of aluminum oxide material and is formed on the surface of the bolt body (1) by anodizing.

7. The anti-rust fastening bolt for automobile wheel hubs according to claim 5, characterized in that, The filler layer (302) uses a silane coupling agent to fill the tiny pores that may exist on the surface of the coating and improve the overall density.

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