Long-life corrosion-resistant heavy truck hub nut

Abstract

The utility model provides a kind of long-life corrosion-resistant heavy truck hub nut, to solve the problems of poor protective performance, poor lubrication effect and poor locking reliability in existing heavy truck hub nut, including nut body, dust cover, lubricating device and locking mechanism, nut body inside is equipped with center screw hole and internal thread, outside coaxial sleeve nut protective sleeve is equipped, top is equipped with annular groove to cooperate installation dust cover, side wall is equipped with lubricating device, bottom is equipped with flange block, flange block inside extends and is equipped with sealing groove and inserts sealing washer, outer periphery is equipped with clamping block;The utility model can effectively block external corrosive substances, reduce thread wear, realize reliable locking, significantly improve the corrosion resistance of nut, lubrication effect and connection reliability, reduce maintenance cost, ensure heavy truck driving safety, suitable for heavy truck hub connection under various complex working conditions.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub nut technology, and in particular to a long-life, corrosion-resistant heavy truck wheel hub nut. Background Technology

[0002] Heavy truck wheel nuts are key fasteners used to fix wheels to the wheel hubs of heavy trucks. They work together with wheel bolts to ensure that the wheels are securely installed and that the vehicle is safe to drive. During the operation of a heavy truck, wheel nuts need to withstand huge radial forces, axial forces, and complex torques generated by vehicle vibration, braking, and steering.

[0003] The utility model patent with authorization announcement number CN201539491U discloses a "novel hub nut", including a nut and a movable washer. The nut and the movable washer are sleeved together at one axial end. It also includes an anti-loosening washer. The anti-loosening washer has a pair of concave-convex spherical surfaces on one axial end and the corresponding end of the movable washer. The anti-loosening washer has anti-loosening teeth on the end face of the other axial end. The contact surface between the anti-loosening washer and the movable washer is a spherical surface, which has an automatic positioning function, so that the pressure center after the nut is tightened can be kept on the axis of the hub bolt, thereby making the thread force uniform. In addition, the anti-loosening teeth on the end face of the other axial end of the anti-loosening washer can effectively improve the service life of the hub bolt assembly. However, this utility model lacks an effective anti-corrosion coating or structural design. In harsh working environments, such as humid, saline-alkali areas or frequent contact with mud, water, chemicals, etc., the surface of the nut and the threaded part are easily corroded, making it difficult to guarantee the safe service life of the nut.

[0004] To improve protective performance, a utility model with authorization announcement number CN204200810U discloses a "wheel hub nut assembly for automobile wheel hubs," comprising a nut body; a dust cover; and a guide fixing washer. The nut body has two ends, a large end being a hexagonal flange and a small end being a circular protective sleeve. The inner hole of the nut body has an internal thread. A dust cover is fixedly installed on the end face of the hexagonal flange. The guide fixing washer is fitted onto the circular protective sleeve of the nut body. The connection between the hexagonal flange and the circular protective sleeve forms a stepped surface. A retaining ring structure is formed at the root of the circular protective sleeve. The nut body is connected to the guide fixing washer through the retaining ring structure. This utility model is easy to install and operate, and can easily position automobile wheel hubs, ensuring a safe service life. However, this utility model lacks a lubrication device and cannot effectively deliver lubricating oil to various parts of the threads. During long-term use, the dry friction between the threads will accelerate the wear of the nut and reduce its fatigue resistance.

[0005] In summary, existing heavy-duty truck wheel hub nut devices typically have the following drawbacks: 1) Insufficient protection performance: Some existing heavy truck wheel hub nut devices are mainly made of ordinary metal materials and lack effective anti-corrosion coatings or structural designs. In harsh working environments, such as humid, saline-alkali areas or frequent contact with mud, water, chemicals, etc., the surface and thread of the nut are easily corroded and rusted. This not only increases the friction coefficient of the nut, making disassembly and installation difficult, but also leads to thread damage, reduces the load-bearing capacity and service life of the nut, and poses safety hazards. 2) Poor lubrication: Although some existing heavy truck wheel hub nuts mention some protective measures, they pay little attention to the lubrication of the internal threads of the nuts. They do not have a dedicated lubrication device, or the lubrication device has a simple structure that cannot effectively deliver lubricating oil to all parts of the threads. During long-term use, the dry friction between the threads will accelerate the wear of the nuts, reduce their fatigue resistance, and make the nuts prone to loosening, stripping, and other problems, affecting their reliability and service life. 3) Poor locking reliability: Some existing heavy truck wheel hub nut devices have an insufficiently stable or poorly designed locking mechanism. During the operation of heavy trucks, the vibration, bumps, and frequent braking and steering of the vehicle will generate a large impact force and torque, which can easily cause the nuts to loosen. If the loose nuts are not detected in time, the wheel may fall off while driving, causing serious traffic accidents. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the existing technology by proposing a long-life, corrosion-resistant heavy truck wheel hub nut that can solve these problems.

[0007] To achieve the above objectives, this utility model proposes a long-life, corrosion-resistant heavy-duty truck wheel hub nut, comprising a nut body, a dust cover, a lubrication device, and a locking mechanism. Its features include: a through-hole central threaded hole inside the nut body with an internal thread; a nut protective sleeve coaxially fitted around the nut body; an annular groove at the top of the nut body that mates with the dust cover; a lubrication device on the sidewall of the nut body, comprising an oil injection hole, an oil delivery channel, and a sealing plug; the oil injection hole is located inside the nut body; the oil delivery channel connects to the oil injection hole; and a sealing plug is located at the end of the oil delivery channel; the nut body also includes a locking mechanism; an axially extending guide groove on the sidewall of the nut body, into which a locking bolt is installed; a flange block at the bottom of the nut body, extending along the body of the flange block with a sealing groove containing a sealing washer; and a clamping block on the outer periphery of the flange block that mates with a sliding groove.

[0008] Preferably, the nut body further includes a damping coating, and the internal thread surface is uniformly coated with the damping coating.

[0009] Preferably, the dust cover includes a sealing strip and a sealing outer cover, the sealing strip and the sealing outer cover being an integrally formed structure, the sealing outer cover being disposed on the outside of the sealing strip, the sealing strip being adapted to the annular groove, and the diameter of the sealing outer cover being larger than the diameter of the sealing strip.

[0010] Preferably, the nut body includes a fixed seat and a through hole, and the dust cover also includes a movable handle and a fastening bolt. The fixed seat is fixedly installed on one side of the top of the nut body, one end of the movable handle of the dust cover is hinged to the fixed seat, and a through hole is opened on the other side of the top of the nut body. A fastening bolt is provided at the corresponding position of the dust cover, and the fastening bolt is threadedly connected to the through hole.

[0011] Preferably, the locking mechanism includes a guide groove, a locking bolt, a spring, a fixing block, and a ball bearing. The spring is fitted onto the locking bolt, and the locking bolt abuts against the fixing block. The fixing block is adapted to the ball bearing. The axial movement of the locking bolt is transmitted to the fixing block through the spring, and the fixing block drives the ball bearing to roll along a preset trajectory.

[0012] Preferably, the fixing block is a hemispherical block, the first end face of the fixing block is a rectangular plane, the first end face abuts against the locking bolt, and the second end face of the fixing block is a curved surface adapted to the ball bearing.

[0013] Preferably, the flange block is fixedly connected to the bottom of the nut body, and the flange block gradually decreases in size along the opening of the nut body.

[0014] Preferably, the flange block further includes a clamping block, a clamping protrusion, a sliding groove, a snap fastener, and anti-slip texture. The inner circumference of the flange block is provided with a plurality of clamping blocks, the clamping blocks are provided with clamping protrusions, a sliding groove is formed between the clamping blocks and the flange block, a snap fastener is provided in the sliding groove, the clamping protrusions are tightly fitted with the snap fasteners, and the outer circumference of the flange block is also provided with anti-slip texture.

[0015] The beneficial effects of this utility model are: 1) Improved corrosion resistance: Through the dual protection of the damping coating on the inner thread surface of the nut body, the nut protective sleeve, and the dust cover, it can effectively prevent external corrosive substances from eroding the threads, reduce the risk of rust, extend the service life of the nut in harsh environments, and reduce replacement costs. 2) Convenient Maintenance: The lubrication device is designed to provide timely lubrication to the threads, reducing dry friction between threads and lowering the coefficient of friction. This effectively slows down the wear rate of the nut, improves its fatigue resistance, and ensures that the nut maintains good connection performance during long-term use. The oil injection hole and oil delivery channel allow for convenient lubrication maintenance of the nut's interior. Lubricating oil can be replenished and replaced without disassembling the nut, making operation simple and convenient and improving maintenance efficiency. 3) Reliable connection: The locking mechanism achieves reliable locking of the nut through the cooperation of springs, fixing blocks and balls. At the same time, the clamping blocks and sliding grooves on the flange can effectively prevent the nut from loosening due to vehicle vibration, bumps and frequent braking and steering, ensuring a firm connection between the wheel and the hub, ensuring the safety of heavy truck driving. The reliable locking mechanism can prevent the wheel from falling off due to the nut loosening during driving, reducing the risk of traffic accidents and providing strong protection for vehicle driving safety.

[0016] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 Enlarged schematic diagram of the locking mechanism; Figure 3 This is a top view of the present invention; Figure 4 This is a bottom view of the present invention.

[0018] Numbering in the diagram: 1-Nut body; 2-Center threaded hole; 21-Internal thread; 22-Damping coating; 3-Nut protective sleeve; 4-Dust cover; 41-Annular groove; 42-Fixing seat; 43-Moving handle; 44-Through hole; 45-Fasting bolt; 46-Sealing strip; 47-Sealing cover; 5-Lubrication device; 51-Oil injection hole; 52-Oil delivery channel; 53-Sealing plug; 6-Locking mechanism; 61-Guide groove; 62-Locking bolt; 63-Spring; 64-Fixing block; 65-Ball; 7-Flange block; 71-Sealing groove; 72-Sealing washer; 73-Clamping block; 74-Clamping protrusion; 75-Sliding groove; 76-Snap; 77-Anti-slip texture. Detailed Implementation

[0019] Example 1: See Figures 1 to 4 This utility model discloses a long-life, corrosion-resistant heavy-duty truck wheel hub nut, comprising a nut body 1, a dust cover 4, a lubrication device 5, and a locking mechanism 6, characterized in that: Figure 1As shown, the nut body 1 has a through central threaded hole 2 inside, and an internal thread 21 inside the central threaded hole 2. A nut protective sleeve 3 is coaxially fitted on the outside of the nut body 1. The top of the nut body 1 has an annular groove 41, which is fitted with a dust cover 4. The side wall of the nut body 1 has a lubrication device 5, which includes an oil injection hole 51, an oil delivery channel 52, and a sealing plug 53. The oil injection hole 51 is located inside the nut body 1, the oil delivery channel 52 communicates with the oil injection hole 51, and a sealing plug 53 is provided at the end of the oil delivery channel 52. Figure 2 As shown, the nut body 1 is also provided with a locking mechanism 6. The side wall of the nut body 1 is provided with an axially extending guide groove 61, and a locking bolt 62 is installed in the guide groove 61. The bottom end of the nut body 1 is provided with a flange block 7. The flange block 7 extends along the inside of the nut body 1 and is provided with a sealing groove 71. A sealing gasket 72 is embedded in the sealing groove 71. A clamping block 73 is provided on the outer periphery of the flange block 7. The clamping block 73 is installed in conjunction with the sliding groove 75.

[0020] The nut body 1 also includes a damping coating 22, and the surface of the internal thread 21 is uniformly coated with the damping coating 22; for example Figure 3 As shown, the dust cover 4 includes a sealing strip 46 and a sealing outer cover 47, which are integrally formed. The sealing outer cover 47 is disposed outside the sealing strip 46, and the sealing strip 46 is adapted to the annular groove 41. The diameter of the sealing outer cover 47 is larger than the diameter of the sealing strip 46. The nut body 1 includes a fixing seat 42 and a through hole 44. The dust cover 4 also includes a movable handle 43 and a fastening bolt 45. The fixing seat 42 is fixedly installed on one side of the top end of the nut body 1. One end of the movable handle 43 of the dust cover 4 is hinged to the fixing seat 42. A through hole 44 is provided on the other side of the top end of the nut body 1. A fastening bolt 45 is provided at a corresponding position on the dust cover 4. The fastening bolt 45 is threadedly connected to the through hole 44. The locking mechanism 6 includes a guide groove 61, a locking bolt 62, a spring 63, a fixing block 64, and a ball bearing 65. The spring 63 is fitted onto the locking bolt 62, and the locking bolt 62 abuts against the fixing block 64. The fixing block 64 is adapted to the ball bearing 65. The axial movement of the locking bolt 62 is transmitted to the fixing block 64 through the spring 63, and the fixing block 64 drives the ball bearing 65 to roll along a preset trajectory. The fixing block 64 is a hemispherical block, and its first end face is a rectangular plane that abuts against the locking bolt 62. The second end face of the fixing block 64 is a curved surface adapted to the ball bearing 65. The flange block 7 is fixedly connected to the bottom of the nut body 1, and the flange block 7 gradually decreases in size along the opening of the nut body 1. Figure 4As shown, the flange block 7 further includes a clamping block 73, a clamping protrusion 74, a sliding groove 75, a snap fastener 76, and an anti-slip texture 77. The inner circumference of the flange block 7 is provided with a plurality of clamping blocks 73, the clamping blocks 73 are provided with clamping protrusions 74, a sliding groove 75 is formed between the clamping blocks 73 and the flange block 7, the sliding groove 75 is provided with snap fasteners 76, the clamping protrusions 74 and snap fasteners 76 are tightly fitted, and the outer circumference of the flange block 7 is also provided with anti-slip texture 77.

[0021] In this embodiment, the nut body 1 is hexagonal, the flange block 7 is a rotatable cylindrical body, the dust cover 4 adopts an inner and outer double-layer structure, its sealing strip 46 is circular and fits tightly with the annular groove 41 at the top of the nut body 1, the sealing outer cover 47 is frustum-shaped and its diameter is larger than that of the sealing strip 46, the oil channel 52 is a straight hole that extends radially from the side wall of the nut body 1 to the position of the central screw hole 2; the clamping block 73 is cuboid in shape and is installed on the outer periphery of the flange block 7, and its surface is provided with several clamping protrusions 74; the damping coating 22 is made of epoxy resin material and coated on the surface of the internal thread 21.

[0022] This embodiment has a simple structure, is easy to process, and has a low cost. The dust cover 4 can effectively prevent dust and moisture from entering and protect the internal threads. The straight hole design of the oil channel 52 facilitates the injection and distribution of lubricating oil, ensuring the lubrication effect of the threads. The epoxy resin material of the damping coating 22 has good anti-corrosion properties and extends the service life of the nut. The cuboid shape and design of the clamping block 73 and the clamping protrusion 74 can provide good connection tightness and prevent the nut from loosening. It is suitable for general heavy truck wheel hub connection scenarios, especially in urban road transportation, and can effectively cope with daily bumps and vibrations, ensuring a firm connection and normal operation of the wheel.

[0023] Example 2: This embodiment is basically the same as embodiment 1, except that: the sealing strip 46 of the dust cover 4 is trapezoidal, which fits more tightly with the annular groove 41; the sealing cover 47 adopts a hemispherical design with a smooth outer surface; the oil channel 52 is spiral, extending obliquely from the side wall of the nut body 1 to the central screw hole 2; the clamping block 73 is semi-cylindrical and evenly distributed on the outer periphery of the flange block 7; the clamping protrusion 74 is hemispherical; the damping coating 22 is made of polyurethane material, which has excellent wear resistance and corrosion resistance.

[0024] In this embodiment, the trapezoidal shape of the sealing strip 46 and the hemispherical design of the sealing cover 47 enhance the sealing performance and impact resistance of the dust cover 4, better preventing impurities from entering and protecting the internal structure; the spiral oil channel 52 allows the lubricating oil to be distributed more evenly between the threads, improving the lubrication effect and reducing friction and wear; the semi-cylindrical clamping block 73 and the hemispherical clamping protrusion 74 can provide a more uniform clamping force, ensuring a tight connection between the nut and the hub; the damping coating 22 of polyurethane material has better wear resistance and corrosion resistance, adapting to harsher working environments; it is suitable for use in mountainous roads or mines with poor road conditions; it can effectively cope with frequent bumps, vibrations and impacts, ensuring the reliability and stability of the heavy truck hub nut, and reducing maintenance costs and replacement frequency.

[0025] Example 3: This embodiment is basically the same as embodiment 1, except that: the sealing strip 46 of the dust cover 4 is rectangular and fits tightly with the annular groove 41; the sealing cover 47 adopts a polygonal geometric shape, which has high structural strength and stability; the oil delivery channel 52 is designed with multiple parallel branches, which extend from the side wall of the nut body 1 towards the central screw hole 2; the clamping block 73 is arc-shaped and installed on the outer periphery of the flange block 7; the clamping protrusion 74 is rectangular; the damping coating 22 is made of acrylic material, which has good elasticity and corrosion resistance.

[0026] In this embodiment, the combination of the polygonal sealing cover 47 and the rectangular sealing strip 46 of the dust cover 4 provides higher structural strength and sealing performance, effectively resisting external impacts and impurity intrusion; the multi-branch oil delivery channel 52 design allows the lubricating oil to more comprehensively cover the thread surface, achieving better lubrication effect; the arc-shaped clamping block 73 and the rectangular block-shaped clamping protrusion 74 can provide more stable clamping force, ensuring that the nut will not loosen under various complex working conditions; the acrylate material damping coating 22 has good elasticity and corrosion resistance, which can reduce noise and wear caused by vibration and friction while ensuring the strength of the threaded connection; it is suitable for heavy-duty transportation and heavy truck wheel hub connection under special working conditions; it can ensure the firmness and stability of the wheel under high load and high intensity use conditions, improve the vehicle's operating safety and reliability, and reduce the failure rate and maintenance costs.

[0027] Working principle: When the heavy-duty truck wheel hub nut of this patent is installed on the heavy-duty truck wheel hub, the central threaded hole 2 of the nut body 1 engages with the external thread of the wheel hub shaft end; during the engagement process, the internal thread 21 of the nut body 1 meshes with the external thread of the wheel hub shaft end, realizing the initial connection between the nut and the wheel hub; the sealing strip 46 of the dust cover 4 fits tightly with the annular groove 41 at the top of the nut body 1, while the sealing cover 47 covers most of the top area of ​​the nut; this can effectively prevent external dust, mud, sand and other impurities from entering the nut, preventing impurities from causing wear on the threads and contaminating the lubricating oil, thereby extending the service life of the nut and ensuring the reliability of the threaded connection; through the oil injection hole 51 of the lubrication device 5, lubricating oil is injected into the nut; the lubricating oil flows along the oil delivery channel 52 and finally reaches the thread inside the nut body 1; during the relative movement between the nut and the wheel hub shaft end, the lubricating oil forms an oil film on the thread surface, effectively The system reduces friction and wear between threads, minimizing fatigue damage to the nut during use, thereby improving its service life and connection reliability. Simultaneously, the sealing plug 53 seals the end of the oil channel 52, preventing lubricant leakage. When the nut is tightened to a certain extent, the locking mechanism 6 begins to function; the locking bolt 62 moves axially within the guide groove 61, compressing the spring 63. When the tightening force reaches a certain level, the spring force of the spring 63 pushes the fixing block 64, causing the ball bearing 65 to roll along a preset trajectory. The flange block 7 is fixedly connected to the bottom of the nut body 1 and gradually decreases in size along the opening of the nut body 1. Its inner circumferential clamping block 73 is slidably connected to the sliding groove 75, and the clamping protrusion 74 is tightly engaged with the buckle 76, further enhancing the connection strength and sealing performance between the nut and the hub. Meanwhile, the anti-slip texture 77 on the outer circumferential surface of the flange block 7 increases friction during installation and disassembly, preventing slippage and improving operational safety and convenience.

[0028] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A long-life, corrosion-resistant heavy-duty truck wheel hub nut, comprising a nut body (1), a dust cover (4), a lubrication device (5), and a locking mechanism (6), characterized in that: The nut body (1) has a through central threaded hole (2) inside, and an internal thread (21) is provided inside the central threaded hole (2). A nut protective sleeve (3) is coaxially fitted on the outside of the nut body (1). An annular groove (41) is provided at the top of the nut body (1), and the annular groove (41) is fitted with a dust cover (4). A lubrication device (5) is provided on the side wall of the nut body (1). The lubrication device (5) includes an oil injection hole (51), an oil delivery channel (52), and a sealing plug (53). The oil injection hole (51) is opened on the inside of the nut body (1), and the oil delivery channel (52) is connected to the oil injection hole. The nut body (1) is provided with a locking mechanism (6), and the nut body (1) is provided with an axially extending guide groove (61) on the side wall of the nut body (1). A locking bolt (62) is installed in the guide groove (61). The nut body (1) is provided with a flange block (7) at the bottom end. The flange block (7) is provided with a sealing groove (71) extending along the nut body (1). A sealing gasket (72) is embedded in the sealing groove (71). A clamping block (73) is provided on the outer periphery of the flange block (7). The clamping block (73) is installed in conjunction with the sliding groove (75).

2. The long-life, corrosion-resistant heavy-duty truck wheel hub nut as described in claim 1, characterized in that: The nut body (1) also includes a damping coating (22), and the surface of the internal thread (21) is uniformly coated with the damping coating (22).

3. The long-life, corrosion-resistant heavy-duty truck wheel hub nut as described in claim 1, characterized in that: The dust cover (4) includes a sealing strip (46) and a sealing cover (47). The sealing strip (46) and the sealing cover (47) are integrally formed. The sealing cover (47) is located on the outside of the sealing strip (46). The sealing strip (46) is adapted to the annular groove (41). The diameter of the sealing cover (47) is larger than the diameter of the sealing strip (46).

4. The long-life, corrosion-resistant heavy-duty truck wheel hub nut as described in claim 1, characterized in that: The nut body (1) includes a fixed seat (42) and a through hole (44). The dust cover (4) also includes a movable handle (43) and a fastening bolt (45). The fixed seat (42) is fixedly installed on one side of the top of the nut body (1). One end of the movable handle (43) of the dust cover (4) is hinged to the fixed seat (42). The other side of the top of the nut body (1) is provided with a through hole (44). The dust cover (4) is provided with a fastening bolt (45) at the corresponding position. The fastening bolt (45) is threadedly connected to the through hole (44).

5. The long-life, corrosion-resistant heavy-duty truck wheel hub nut as described in claim 1, characterized in that: The locking mechanism (6) includes a guide groove (61), a locking bolt (62), a spring (63), a fixing block (64), and a ball (65). The spring (63) is fitted onto the locking bolt (62), and the locking bolt (62) abuts against the fixing block (64). The fixing block (64) is adapted to the ball (65). The axial movement of the locking bolt (62) is transmitted to the fixing block (64) through the spring (63), and the fixing block (64) drives the ball (65) to roll along a preset trajectory.

6. The long-life, corrosion-resistant heavy-duty truck wheel hub nut as described in claim 1, characterized in that: The fixing block (64) is a hemispherical block. The first end face of the fixing block (64) is a rectangular plane. The first end face abuts against the locking bolt (62). The second end face of the fixing block (64) is a curved surface adapted to the ball (65).

7. The long-life, corrosion-resistant heavy-duty truck wheel hub nut as described in claim 1, characterized in that: The flange block (7) is fixedly connected to the bottom of the nut body (1), and the flange block (7) gradually decreases in size along the opening of the nut body (1).

8. The long-life, corrosion-resistant heavy-duty truck wheel hub nut as described in claim 1, characterized in that: The flange block (7) further includes a clamping block (73), a clamping protrusion (74), a sliding groove (75), a buckle (76), and an anti-slip texture (77). The inner circumference of the flange block (7) is provided with a plurality of clamping blocks (73), the clamping blocks (73) are provided with clamping protrusions (74), a sliding groove (75) is formed between the clamping blocks (73) and the flange block (7), a buckle (76) is provided in the sliding groove (75), the clamping protrusions (74) and the buckles (76) are tightly fitted, and the outer circumference of the flange block (7) is also provided with anti-slip texture (77).

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