Rust-proof automobile hub bolt

Abstract

The utility model discloses a rust-proof automobile hub bolt, which relates to the technical field of automobile hub bolts and comprises a rim, spokes distributed radially are fixedly connected to the inner side of the rim, and a mounting block is fixedly connected to one end, far away from the rim, of each spoke. A fixing cover is mounted on the mounting block, a mounting groove of an annular structure is formed in the middle of the fixing cover, anode metal is embedded in the mounting groove, a sealing cover is mounted on the outer side of the mounting groove, and the sealing cover and the mounting groove are buckled and matched to form a sealing structure. According to the antirust automobile hub bolt, the high-activity anode metal and the hub bolt form a closed-loop circuit through the wire, the elastic electrode and the contact electrode, the anode metal is corroded preferentially, the bolt serves as a cathode and is prevented from being rusted, the spring pushes the contact electrode to press the end face of the bolt all the time, and the elastic electrode is flexibly attached to the anode metal; even under vibration or thermal deformation, stable conduction is still kept, and protection failure is avoided.

Description

Technical Field

[0001] This utility model relates to the field of automotive wheel hub bolt technology, specifically a rust-proof automotive wheel hub bolt. Background Technology

[0002] Wheel bolts are fasteners that connect wheels to vehicle axles or brake drums and discs. They are responsible for securing the wheels to the vehicle to ensure driving safety, but they are prone to corrosion over time.

[0003] To overcome the above-mentioned defects, a Chinese patent (publication number: CN207212894U) discloses a corrosion-resistant and rust-proof wheel hub bolt, including a wheel hub bolt body. One end of the wheel hub bolt body is provided with a bolt head, and the other end is provided with a bolt tail. The surface of the bolt head is provided with a stainless steel cap for the wheel hub bolt, and the bolt head and the stainless steel cap for the wheel hub bolt are stamped and riveted together by a stamping press. A stainless steel buckle is provided at the lower edge of the bolt head. The end of the bolt tail away from the bolt head is provided with a zinc block mounting hole. After a layer of stainless steel is stamped and riveted onto the head of the wheel hub bolt, it plays a role in corrosion and rust prevention. The entire wheel hub bolt is cold-forged, and the manufacturing process is the same as the traditional process, so the stress on the bolt is the same. The only difference is that a layer of rust-proof stainless steel is riveted onto the head. In addition, a small hole is opened at the bolt tail, and a zinc block is screwed into the small hole using threads. The zinc block and the cast iron generate a galvanic cell reaction to protect the bolt from corrosion.

[0004] While existing technologies can overcome the shortcomings mentioned above, other problems still exist during their operation: wheel hub bolts are exposed to corrosive environments such as rainwater, salt spray, and de-icing agents, making them prone to rust, which leads to difficulties in disassembly or even breakage. Ordinary gaskets or sealing structures are prone to poor sealing due to vibration and aging, and moisture seepage accelerates bolt corrosion. Utility Model Content

[0005] The purpose of this invention is to provide a rust-proof automotive wheel hub bolt to solve the problem in the background art where wheel hub bolts exposed to corrosive environments such as rainwater, salt spray, and de-icing agents are prone to rusting, leading to difficulties in disassembly or even breakage.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a rust-proof automobile wheel hub bolt, including a wheel rim, wherein spokes are fixedly connected to the inner side of the wheel rim in a radial pattern, and a mounting block is fixedly connected to the end of the spokes away from the wheel rim;

[0007] The mounting block is fitted with a fixing cover, the fixing cover has an annular mounting groove in the middle, the mounting groove is embedded with an anode metal, and a sealing cover is installed on the outside of the mounting groove, and the sealing cover and the mounting groove are fastened together to form a sealing structure.

[0008] Preferably, the mounting block has annularly distributed mounting holes inside, and the mounting holes have annular sealing grooves inside, with a hub bolt installed inside each mounting hole.

[0009] Preferably, a washer is fitted on the outside of the hub bolt, and a sealing ring with an annular structure is provided on one side of the washer, and the sealing ring is installed in the sealing groove inside the mounting hole.

[0010] Preferably, the outer side of the fixing cover is fixedly connected with annularly distributed positioning sleeves, and each positioning sleeve is slidably connected inside the mounting hole. A fixing bolt is installed in the middle of the fixing cover, and the fixing bolt passes through the sealing cover and the fixing cover and is threaded to the center of the mounting block.

[0011] Preferably, a contact electrode is slidably connected inside the positioning sleeve, the end of the contact electrode and the end of the hub bolt are in contact with each other, and a spring is fixedly connected between the end of the contact electrode away from the hub bolt and the inside of the positioning sleeve.

[0012] Preferably, a wire is fixedly connected inside the fixing cover, one end of the wire is electrically connected to a contact electrode, and the other end of the wire away from the contact electrode is fixedly connected to an elastic electrode.

[0013] Preferably, the elastic electrode extends into and is placed inside the mounting groove, and the elastic electrode and the anode metal are in contact with each other. The anode metal is electrically connected to the wheel hub bolt through a path formed by the elastic electrode, the wire and the contact electrode. The electrochemical activity of the anode metal is higher than that of the wheel hub bolt.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This type of rust-proof automotive wheel hub bolt uses a highly active anode metal to form a closed-loop circuit with the wheel hub bolt through a wire, an elastic electrode, and a contact electrode. This circuit preferentially corrodes the anode metal, allowing the bolt to act as a cathode and avoid rusting. A spring pushes the contact electrode to always press against the bolt end face, and the elastic electrode flexibly fits the anode metal, maintaining stable conductivity even under vibration or thermal deformation, thus preventing protection failure.

[0016] When the bolts are tightened, the sealing ring undergoes elastic deformation, completely filling the gap in the sealing groove and forming a watertight and airtight barrier. This effectively isolates moisture, dust, and corrosive substances. The sealing cover and the mounting groove engage to form a closed space, protecting the anode metal from environmental corrosion and ensuring that the corrosion process only occurs in the controlled electrochemical system. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2This is a schematic diagram of the cross-sectional structure of the mounting block of this utility model;

[0019] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0020] Figure 4 This is a schematic diagram of the hub bolt structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the exploded structure of the fixed cover of this utility model;

[0022] Figure 6 This is a schematic cross-sectional view of the fixed cover structure of this utility model.

[0023] In the diagram: 1. Wheel rim; 2. Spokes; 3. Mounting block; 4. Mounting hole; 5. Sealing groove; 6. Hub bolt; 7. Washer; 8. Sealing ring; 9. Fixing cap; 10. Positioning sleeve; 11. Mounting groove; 12. Anode metal; 13. Sealing cap; 14. Fixing bolt; 15. Contact electrode; 16. Spring; 17. Wire; 18. Elastic electrode. Detailed Implementation

[0024] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figure 1 - Figure 6This utility model provides the following technical solution: a rust-proof automobile wheel hub bolt, including a wheel rim 1, with radially distributed spokes 2 fixedly connected to the inner side of the wheel rim 1, and a mounting block 3 fixedly connected to the end of the spokes 2 away from the wheel rim 1; a fixing cover 9 is installed on the mounting block 3, the fixing cover 9 has an annular mounting groove 11 in the middle, an anode metal 12 is embedded in the mounting groove 11, and a sealing cover 13 is installed on the outer side of the mounting groove 11, and the sealing cover 13 and the mounting groove 11 are engaged to form a sealing structure; the mounting block 3 has annularly distributed mounting holes 4 inside, and annularly distributed sealing grooves 5 inside the mounting holes 4, and a wheel hub bolt 6 is installed in each mounting hole 4; a washer 7 is sleeved on the outer side of the wheel hub bolt 6, and an annularly distributed sealing ring 8 is provided on one side of the washer 7, and the sealing ring 8 is installed in the sealing groove 5 inside the mounting hole 4; annularly distributed positioning sleeves 10 are fixedly connected to the outer side of the fixing cover 9, and each positioning sleeve 10 is fixedly connected to the outer side of the fixing cover 9. All are slidably connected inside the mounting hole 4. A fixing bolt 14 is installed in the middle of the fixing cover 9, and the fixing bolt 14 passes through the sealing cover 13 and the fixing cover 9 and is threaded to the center of the mounting block 3. A contact electrode 15 is slidably connected inside the positioning sleeve 10. The end of the contact electrode 15 and the end of the hub bolt 6 are in contact with each other, and a spring 16 is fixedly connected between the end of the contact electrode 15 away from the hub bolt 6 and the inside of the positioning sleeve 10. A wire 17 is fixedly connected inside the fixing cover 9. One end of the wire 17 is electrically connected to the contact electrode 15, and an elastic electrode 18 is fixedly connected to the end of the wire 17 away from the contact electrode 15. The elastic electrode 18 extends into and is placed inside the mounting groove 11, and the elastic electrode 18 and the anode metal 12 are in contact with each other. The anode metal 12 is electrically connected to the hub bolt 6 through the passage formed by the elastic electrode 18, the wire 17 and the contact electrode 15. The electrochemical activity of the anode metal 12 is higher than that of the hub bolt 6.

[0026] A ring-shaped sealing ring 8 is provided on one side of the washer 7. The sealing ring 8 is installed in the sealing groove 5 inside the mounting hole 4. The interference design of the sealing ring 8 causes it to generate a pre-compression force in the sealing groove 5. When the wheel hub bolt 6 is tightened, the sealing ring 8 elastically deforms and completely fills the gap of the sealing groove 5, thereby forming a watertight and airtight barrier to prevent external moisture, dust or corrosive substances from penetrating into the mounting hole 4 and protecting the thread surface of the wheel hub bolt 6 from environmental corrosion.

[0027] When the fixing cover 9 is installed on the mounting block 3, the positioning sleeve 10 slides into the mounting hole 4. The fixing bolt 14 is installed in the middle of the fixing cover 9. The fixing bolt 14 passes through the sealing cover 13 and the fixing cover 9 and is threaded to the center of the mounting block 3. The threaded connection of the fixing bolt 14 generates a locking force, which tightly fixes the fixing cover 9, the sealing cover 13 and the mounting block 3.

[0028] A contact electrode 15, made of conductive material, is slidably connected inside the positioning sleeve 10. The end of the contact electrode 15 is in contact with the end of the wheel hub bolt 6. A spring 16 is fixedly connected between the end of the contact electrode 15 furthest from the wheel hub bolt 6 and the inside of the positioning sleeve 10. The spring 16 works by continuously pushing the contact electrode 15 to slide using elastic force, ensuring that the contact electrode 15 always presses against the end face of the wheel hub bolt 6. This ensures that even when the component moves slightly due to wheel vibration or temperature changes, the contact electrode 15 maintains stable contact, preventing electrical connection loss. The sliding fit within the positioning sleeve 10 allows the contact electrode 15 to freely adjust its position to adapt to displacement changes under different operating conditions.

[0029] The wire 17 is made of a highly conductive material to ensure a low-resistance path. During the manufacturing of the fixing cover 9, the wire 17 is embedded in the internal channel to prevent external exposure that could lead to short circuits or corrosion. An elastic electrode 18 is fixedly connected to the end of the wire 17 away from the contact electrode 15. The elastic electrode 18 is made of a flexible conductive material and extends into and is placed inside the mounting groove 11. The elastic electrode 18, through its elastic properties, constantly presses against the surface of the anode metal 12. The mounting groove 11 is located in the middle of the fixing cover 9 and has a ring-shaped structure. The anode metal 12 is embedded inside the mounting groove 11. When the elastic electrode 18 contacts the anode metal 12, the flexibility of the elastic electrode 18 ensures a reliable electrical connection is maintained during component assembly or minor deformation, preventing interruptions.

[0030] The anode metal 12 has higher electrochemical activity than the hub bolt 6. The anode metal 12 is embedded inside the mounting groove 11, and a sealing cover 13 is installed on the outside of the mounting groove 11. The sealing cover 13 and the mounting groove 11 are fastened together to form a sealed structure. The sealing cover 13 is fastened to the groove portion of the mounting groove 11 through its annular structure, forming a completely sealed space that isolates external moisture, salt spray or other corrosive factors. When the sealing cover 13 is closed, it prevents environmental factors from corroding the surface of the anode metal 12, ensuring that the anode metal 12 is only subject to controlled corrosion during the electrochemical process.

[0031] The anode metal 12 is a low-potential metal material, and its high electrochemical activity causes it to preferentially undergo oxidation, protecting the hub bolt 6 from corrosion. The anode metal 12 is electrically connected to the hub bolt 6 through a pathway formed by the elastic electrode 18, the wire 17, and the contact electrode 15. In the connected state, the anode metal 12, the wire 17, the elastic electrode 18, the contact electrode 15, and the hub bolt 6 form a closed-loop circuit. When environmental humidity triggers electrochemical corrosion, the anode metal 12, acting as the anolyte, corrodes itself, while the hub bolt 6, acting as the cathode, remains uncorroded, thus achieving cathodic protection.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rust-proof automobile wheel hub bolt, comprising a wheel hub bolt (6) and a wheel rim (1) installed on the outside of the wheel hub bolt (6), wherein spokes (2) are fixedly connected to the inner side of the wheel rim (1) in a radial pattern, and a mounting block (3) is fixedly connected to one end of the spokes (2) away from the wheel rim (1). Its features are: The mounting block (3) is fitted with a fixing cover (9), and the fixing cover (9) has an annular mounting groove (11) in the middle. An anode metal (12) is embedded inside the mounting groove (11), and a sealing cover (13) is installed on the outside of the mounting groove (11). The sealing cover (13) and the mounting groove (11) are engaged to form a sealing structure.

2. The rust-proof automotive wheel hub bolt according to claim 1, characterized in that: The mounting block (3) has annularly distributed mounting holes (4) inside, and annular sealing grooves (5) are provided inside the mounting holes (4). Each mounting hole (4) is equipped with a hub bolt (6).

3. The rust-proof automotive wheel hub bolt according to claim 2, characterized in that: A washer (7) is fitted on the outside of the hub bolt (6), and a sealing ring (8) with an annular structure is provided on one side of the washer (7). The sealing ring (8) is installed in the sealing groove (5) inside the mounting hole (4).

4. The rust-proof automotive wheel hub bolt according to claim 1, characterized in that: The fixed cover (9) is fixedly connected to the outside of the ring-shaped equidistant positioning sleeves (10), and each positioning sleeve (10) is slidably connected inside the mounting hole (4). The fixed cover (9) is installed with a fixing bolt (14) in the middle, and the fixing bolt (14) passes through the sealing cover (13) and the fixed cover (9) and is threaded to the center of the mounting block (3).

5. The rust-proof automotive wheel hub bolt according to claim 4, characterized in that: The positioning sleeve (10) has a sliding connection to a contact electrode (15). The end of the contact electrode (15) and the end of the hub bolt (6) are in contact with each other. A spring (16) is fixedly connected between the end of the contact electrode (15) away from the hub bolt (6) and the inside of the positioning sleeve (10).

6. The rust-proof automotive wheel hub bolt according to claim 5, characterized in that: The fixed cover (9) is fixedly connected to a wire (17), one end of which is electrically connected to a contact electrode (15), and the other end of which is away from the contact electrode (15) is fixedly connected to an elastic electrode (18).

7. A rust-proof automotive wheel hub bolt according to claim 6, characterized in that: The elastic electrode (18) extends into and is placed inside the mounting groove (11), and the elastic electrode (18) and the anode metal (12) are in contact with each other. The anode metal (12) is electrically connected to the hub bolt (6) through the passage formed by the elastic electrode (18), the wire (17) and the contact electrode (15). The electrochemical activity of the anode metal (12) is higher than that of the hub bolt (6).

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