Corrosion-resistant and anti-clogging hub assembly for ground effect vehicles

Abstract

This invention relates to a corrosion-resistant and anti-clogging hub device for ground effect vehicles (GEVs), belonging to the technical field of GEV manufacturing. It includes a tire, a hub, and a support column; the support column is cylindrical and mounted on the hull structure, with a conversion seat fixed at its bottom, which is assembled with a rotating shaft; the tire is mounted on the top of the hub, and a bushing assembly is mounted on the bottom of the hub and fitted onto the rotating shaft, forming a sliding bearing structure; the bushing assembly comprises an axial load-bearing bushing, a mounting bushing, and a hub bushing, wherein the hub bushing is engaged within the hub, the mounting bushing is disposed within the hub bushing, and the axial load-bearing bushing is mounted on the rotating shaft. This invention's sliding bearing provides drainage for water and sediment, and through the structure and assembly of the bushing assembly, solves the problem of mounting the bushing assembly on the rotating shaft, and achieves the axial thrust resistance function of the sliding bearing.

Description

Technical Field

[0001] This invention relates to the field of ground effect vehicle manufacturing technology, and in particular to a corrosion-resistant and anti-clogging hub device for ground effect vehicles. Background Technology

[0002] Ground effect vehicles (GEVs) are winged watercraft that utilize ground effect to fly close to the water surface, and are the fastest type of vessel in the world. Due to their unique aerodynamic layout and the characteristic of flying for extended periods in the ground effect zone, GEVs generally do not use land-based takeoff and landing methods, but only water-based takeoff and landing methods.

[0003] Conventional aircraft or seaplanes can typically take off and land on either land or water. This results in aircraft or seaplanes requiring landing gear systems, while ground effect vehicles (GEVs) utilize landing gear systems.

[0004] The landing wheel system of the ground effect vehicle is only used for launching and landing on the water. It does not have the huge impact encountered when taking off and landing on land. Moreover, the gliding speed of the ground effect vehicle is very slow when launching and landing on the water, and it does not have the problems caused by the high take-off and landing speed of aircraft on land.

[0005] However, the landing wheel system of a ground effect vehicle (GEV) inevitably comes into contact with water, whether fresh or seawater, requiring appropriate anti-corrosion and anti-clogging measures. Furthermore, the water contains sand or mud, which can adversely affect the landing wheel system, especially the wheel hub assembly, and even cause blockages. The current solution is to directly transplant the aircraft's landing wheel hub assembly onto the GEV; however, this method significantly increases the construction cost of the landing wheel system, wastes the original functionality of the landing wheel system, and fails to meet the corrosion resistance and mud / sand blockage prevention requirements of the landing wheel hub assembly.

[0006] Therefore, it is urgent to develop a corrosion-resistant and clog-resistant hub device for ground effect vehicles. Summary of the Invention

[0007] In response to the shortcomings of the existing production technology, the applicant provides a corrosion-resistant and anti-clogging hub device for ground effect vehicles, thereby meeting the requirements for waterproofing and preventing mud and sand intrusion, and solving the corrosion resistance problem.

[0008] The technical solution adopted in this invention is as follows: A corrosion-resistant and anti-clogging hub device for a ground effect vehicle, comprising a tire, a hub, and a support column; the support column is cylindrical and installed on the hull structure, with a conversion seat fixed at the bottom of the support column, the conversion seat being assembled with a rotating shaft; the tire is installed on the top of the hub, and a bushing assembly is installed on the bottom of the hub and matched and installed on the rotating shaft, the rotating shaft and the bushing assembly forming a sliding bearing structure; the bushing assembly comprises an axial bearing bushing, a mounting bushing, and a hub bushing, the hub bushing being snapped into the hub, the mounting bushing being disposed within the hub bushing, and the axial bearing bushing being installed on the rotating shaft; the axial bearing bushing comprises two symmetrically arranged axial bearing semi-circular split bushings, the two symmetrically arranged axial bearing semi-circular split bushings being fixedly connected by radial connecting bolts and nuts for radial fixing of the axial bearing bushing, the axial bearing bushing being fixedly connected to the hub bushing in the axial direction.

[0009] As a further improvement to the above technical solution:

[0010] Preferably, the axial bearing bushing and the hub bushing are fixedly connected by axial connecting bolts and nuts.

[0011] Preferably, the entire bushing assembly is made of monolithically cast nylon material.

[0012] Preferably, the structure of a single axially bearing semi-circular split bushing includes: a radial flange, an axial flange one, an axial thrust boss, an axial drain groove one, a semi-circular support surface one, an axial flange hole one, a radial flange hole, a semi-circular hole, and a circumferential groove; the radial flange is provided with a radial flange hole, one side of the axial flange is perpendicular to the radial flange surface, the axial flange one is the mating surface connecting the axially bearing bushing and the hub bushing, the axial flange one is provided with an axial flange hole one, and the axially bearing bushing and the hub bushing are fixedly connected in the axial flange hole one by axial connecting bolts and nuts; the axial thrust boss is semi-cylindrical, and the axial thrust boss is used to ensure the machining space for the axial drain groove one, the semi-circular support surface one, the semi-circular hole, and the circumferential groove; The first semicircular support surface is the inner hole surface of the axial bearing bushing. The first semicircular support surface is used to cooperate with the rotational support of the outer circular surface of the rotating shaft. The inner diameter of the first semicircular support surface is clearance-fitted with the outer diameter of the rotating shaft to ensure that the axial bearing bushing can rotate freely around the axis of the rotating shaft. An axial drainage groove is machined on the first semicircular support surface. The first axial drainage groove corresponds one-to-one with the second axial drainage groove on the bushing. The first and second axial drainage grooves are used for axial water and sediment drainage. A circumferential groove is also machined on the first semicircular support surface. The circumferential groove is used to cooperate with the circumferential boss on the rotating shaft and to provide axial thrust. A semicircular hole is also machined on the end face of the radial flange. The semicircular hole is fixedly fitted with the second axial boss on the bushing.

[0013] Preferably, the structure of the mounting bushing is: comprising two symmetrical mounting semicircular split bushings.

[0014] Preferably, the structure of a single semi-circular split bushing includes a second semi-circular support surface, a second axial drainage groove, a first axial boss, an axial transition platform, a second axial boss, and a radial boss. The second semi-circular support surface is an inner bore surface, and the second axial drainage groove is provided on the second semi-circular support surface. The first and second axial bosses are cylindrical structures, and the axial transition platform is a conical structure. A radial boss is provided on the outer circular surface in the middle of the second axial boss. The radial boss is used to cooperate with the radial groove on the hub bushing and restrict the rotation of the bushing.

[0015] Preferably, the hub bushing has the following structure: it includes a second axial flange hole, a second axial flange, a hub boss, a first axial cylindrical hole, an axial transition hole, a second axial cylindrical hole, and a radial groove; the second axial flange is the mating surface connecting the hub bushing and the axial bearing bushing, and the second axial flange hole is formed on the second axial flange. The hub bushing and the axial bearing bushing are fixedly connected in the second axial flange hole by axial connecting bolts and nuts; the hub boss has an interference fit with the inner diameter of the hub to ensure that there is no relative rotation between the two, and the installation method is divided into press-fit method and freeze-fit method; the first axial cylindrical hole and the second axial cylindrical hole are cylindrical hole structures, and the axial transition hole is a conical hole structure. The first axial cylindrical hole, the axial transition hole, and the second axial cylindrical hole correspond one-to-one with the first axial boss, the axial transition hole, and the second axial boss on the bushing.

[0016] Preferably, two radial grooves are also provided at the position of the radial boss corresponding to the middle of the second axial boss. The radial grooves cooperate with the radial boss on the mounting sleeve, and the radial grooves cooperate with the radial boss to restrict the rotation of the mounting sleeve.

[0017] Preferably, the first axial boss, the second axial transition platform, and the third axial boss are arranged in ascending order of diameter; the first axial cylindrical hole, the second axial transition hole, and the third axial cylindrical hole are arranged in ascending order of inner diameter.

[0018] Preferably, the rotating shaft has the following structure: it includes a seat shaft connecting hole, a rotating shaft body, and a circumferential boss on the shaft; the seat shaft connecting hole is a bolt through hole for fixed connection between the conversion seat and the rotating shaft; the rotating shaft body is a circular ring cylinder, which is used to fix the conversion seat and install the bushing assembly; the circumferential boss on the shaft is a circumferential boss body structure machined integrally with the rotating shaft body, which is used to install and cooperate with two circumferential grooves in the axial bearing bushing and to provide axial thrust.

[0019] The beneficial effects of this invention are as follows:

[0020] This invention has a compact structure and is easy to operate. By designing it as a sliding bearing, it creatively addresses the requirements of waterproofing and preventing the intrusion of mud and sand by "dredging" rather than "blocking" the sand or mud in the water.

[0021] The present invention also has the following advantages:

[0022] (1) The bushing assembly of the present invention is made entirely of monolithically cast nylon material. Monolithically cast nylon is a non-metallic material, which solves the problem of corrosion resistance.

[0023] (2) The bushing assembly of the present invention solves the problem of installing the bushing assembly on the rotating shaft by splitting it into an axial bearing bushing, an installation bushing and a hub bushing and assembling them together, including axial and radial disassembly and assembly and the installation bushing of the intermediate transition link, and realizes the axial thrust resistance function of the sliding bearing. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a conventional wheel hub device under existing technology.

[0025] Figure 2 This is a schematic diagram of the overall structure of the hub device of the present invention.

[0026] Figure 3 This is a schematic diagram of the bushing assembly of the present invention from direction A.

[0027] Figure 4 This is a schematic diagram of the specific structure of the bushing assembly of the present invention.

[0028] Figure 5 This is a schematic diagram of the axial bearing bushing of the present invention.

[0029] Figure 6 for Figure 5 Top view.

[0030] Figure 7 for Figure 5 Sectional view along direction B.

[0031] Figure 8 This is a schematic diagram of the mounting bushing of the present invention.

[0032] Figure 9 for Figure 8 The C-direction sectional view.

[0033] Figure 10 This is a schematic diagram of the hub bushing structure of the present invention.

[0034] Figure 11 for Figure 10 Side view.

[0035] Figure 12 for Figure 10 The sectional view along direction D.

[0036] Figure 13 This is a schematic diagram of the rotating shaft of the present invention.

[0037] The components include: 1. Tire; 2. Wheel hub; 3. Wheel support; 4. Converter seat; 5. Rolling bearing mounting shaft; 6. Long shaft shoulder; 7. Sealing cover; 8. Rolling bearing; 9. Short shaft shoulder; 10. Axial bearing bushing; 11. Mounting bushing; 12. Wheel hub bushing; 13. Rotating shaft; 14. Axial connecting bolts and nuts; 15. Radial connecting bolts and nuts.

[0038] 1001. Radial flange; 1002. Axial flange one; 1003. Axial thrust boss; 1004. Axial drain groove one; 1005. Semicircular support surface one; 1006. Axial flange hole one; 1007. Radial flange hole; 1008. Semicircular hole; 1009. Circumferential groove.

[0039] 1101. Semicircular support surface II; 1102. Axial drainage groove II; 1103. Axial boss I; 1104. Axial transition platform; 1105. Axial boss II; 1106. Radial boss;

[0040] 1201, Axial flange hole two; 1202, Axial flange two; 1203, Hub boss; 1204, Axial cylindrical hole one; 1205, Axial transition hole; 1206, Axial cylindrical hole two; 1207, Radial groove;

[0041] 1301, Shaft connection hole; 1302, Rotating shaft; 1303, Circumferential boss on the shaft. Detailed Implementation

[0042] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0043] like Figures 2 to 13As shown, the anti-corrosion and anti-clogging hub device for a ground effect vehicle in this embodiment includes a tire 1, a hub 2, and a support column 3. The support column 3 is cylindrical and installed on the hull structure. A conversion seat 4 is fixed at the bottom of the support column 3, and the conversion seat 4 is assembled with a rotating shaft 13. The tire 1 is installed on the top of the hub 2, and a bushing assembly is installed at the bottom of the hub 2 and matched and installed on the rotating shaft 13. The rotating shaft 13 and the bushing assembly cooperate to form a sliding bearing structure. The structure of the bushing assembly includes an axial bearing bushing 10, a mounting... A bushing 11 and a hub bushing 12 are mounted together. The hub bushing 12 is fitted into the hub 2, and the bushing 11 is set inside the hub bushing 12. An axial bearing bushing 10 is mounted on the rotating shaft 13. The structure of the axial bearing bushing 10 is as follows: it includes two symmetrically arranged axial bearing semi-circular split bushings. The two symmetrically arranged axial bearing semi-circular split bushings are fixedly connected by radial connecting bolts and nuts 15 for radial fixation of the axial bearing bushing 10. The axial bearing bushing 10 is fixedly connected to the hub bushing 12 in the axial direction.

[0044] In this embodiment, the axial bearing bushing 10 and the hub bushing 12 are fixedly connected by axial connecting bolts and nuts 14.

[0045] In this embodiment, the entire bushing assembly is made of monolithically cast nylon material.

[0046] In this embodiment, the structure of a single axially bearing semi-circular split bushing includes: a radial flange 1001, an axial flange 1002, an axial thrust boss 1003, an axial drain groove 1004, a semi-circular support surface 1005, an axial flange hole 1006, a radial flange hole 1007, a semi-circular hole 1008, and a circumferential groove 1009; the radial flange 1001 is provided with a radial flange hole 1007, and the surface of the axial flange 1002 is perpendicular to the surface of the radial flange 1001. Flange 1002 is the mating surface connecting the axial bearing sleeve 10 and the hub sleeve 12. An axial flange hole 1006 is provided on the axial flange 1002, and the axial bearing sleeve 10 and the hub sleeve 12 are fixedly connected in the axial flange hole 1006 by axial connecting bolts and nuts 14. The axial thrust boss 1003 is semi-cylindrical and is used to ensure the axial discharge groove 1004, the semi-circular support surface 1005, the semi-circular hole 1008, and the circumferential groove 1. The machining space of 009; the semi-circular support surface 1005 is the inner hole surface of the axial bearing sleeve 10. The semi-circular support surface 1005 is used for rotational support mating with the outer circular surface of the rotating shaft 13. The inner diameter of the semi-circular support surface 1005 and the outer diameter of the rotating shaft 13 are clearance-fitted to ensure that the axial bearing sleeve 10 can rotate freely around the axis of the rotating shaft 40; an axial discharge groove 1004 is machined on the semi-circular support surface 1005. The axial discharge groove 1004 and the axial discharge groove 1004 are mated with the axial bearing sleeve 11. The two drainage grooves 1102 correspond one-to-one. The axial drainage groove 1004 and the axial drainage groove 1102 are used for axial water and sediment discharge. A circumferential groove 1009 is also machined on the semi-circular support surface 1005. The circumferential groove 1009 is used to install and cooperate with the circumferential boss 1303 on the rotating shaft 13 and to provide axial thrust. A semi-circular hole 1008 is also machined on the end face of the radial flange 1001. The semi-circular hole 1008 is fixedly cooperated with the axial boss 1105 of the bushing 11.

[0047] In this embodiment, the structure of the mounting bushing 11 is as follows: it includes two symmetrical mounting semicircular split bushings.

[0048] In this embodiment, the structure of a single semi-circular split bushing includes a semi-circular support surface 1101, an axial drainage groove 1102, an axial boss 1103, an axial transition platform 1104, an axial boss 2105, and a radial boss 1106. The semi-circular support surface 1101 is an inner hole surface, and the axial drainage groove 1102 is provided on the semi-circular support surface 1101. The axial boss 1103 and the axial boss 2105 are cylindrical structures, and the axial transition platform 1104 is a conical structure. A radial boss 1106 is provided on the outer circular surface in the middle of the axial boss 2105. The radial boss 1106 is used to cooperate with the radial groove 1207 on the hub bushing 12 and restrict the rotation of the bushing 11.

[0049] In this embodiment, the hub bushing 12 has the following structure: it includes an axial flange hole 1201, an axial flange 1202, a hub boss 1203, an axial cylindrical hole 1204, an axial transition hole 1205, an axial cylindrical hole 1206, and a radial groove 1207. The axial flange 1202 is the mating surface connecting the hub bushing 12 and the axial bearing bushing 10. The axial flange hole 1201 is provided on the axial flange 1202. The hub bushing 12 is connected to the axial bearing bushing 10 by axial connecting bolts and nuts 14 within the axial flange hole 1201. Sleeve 10 is fixedly connected; the hub boss 1203 is interference-fitted with the inner diameter of the hub 2 to ensure that there is no relative rotation between the two. The installation methods are press-fit and freeze-fit; the axial cylindrical hole 1204 and the axial cylindrical hole 2 1206 are cylindrical hole structures, and the axial transition hole 1205 is a conical hole structure. The axial cylindrical hole 1204, the axial transition hole 1205 and the axial cylindrical hole 2 1206 are respectively matched one-to-one with the axial boss 1103, the axial transition hole 1104 and the axial boss 2 1105 on the mounting sleeve 11.

[0050] In this embodiment, two radial grooves 1207 are also provided at the position of the radial boss 1106 corresponding to the middle of the axial boss 1105. The radial grooves 1207 cooperate with the radial boss 1106 on the mounting bushing 11. The radial grooves 1207 cooperate with the radial boss 1106 to restrict the rotation of the mounting bushing 11.

[0051] In this embodiment, the axial boss 1103, axial transition platform 1104, and axial boss 2 1105 are arranged in ascending order of diameter; the axial cylindrical hole 1204, axial transition hole 1205, and axial cylindrical hole 2 1206 are arranged in ascending order of inner diameter; the axial boss 1103, axial transition platform 1104, and axial boss 2 1105 form a cylinder-cone-cylinder structure arranged in ascending order of diameter, and the axial cylindrical hole 1204, axial transition hole 1205, and axial cylindrical hole 2 1206 form a cylindrical hole-cone hole-cylinder structure arranged in ascending order of diameter.

[0052] In this embodiment, the structure of the rotating shaft 13 includes a seat shaft connecting hole 1301, a rotating shaft body 1302, and a circumferential boss 1303 on the shaft. The seat shaft connecting hole 1301 is a bolt through hole for fixed connection between the conversion seat 4 and the rotating shaft 13. The rotating shaft body 1302 is a cylindrical ring, which is used to fix the conversion seat 4 and install the bushing assembly. The circumferential boss 1303 on the shaft is a circumferential boss structure that is machined integrally with the rotating shaft body 1302. The circumferential boss 1303 on the shaft is used to install and cooperate with the two circumferential grooves 1009 in the axial bearing bushing 10 and to provide axial thrust.

[0053] In this embodiment, the working principle of the present invention is explained as follows:

[0054] To address the issues of corrosion, waterproofing, and silt intrusion that render the hub assembly unusable in water, especially seawater, this embodiment employs a sliding bearing structural design to meet the requirements for resistance to seawater corrosion, waterproofing, and silt intrusion.

[0055] like Figure 2 As shown, in this embodiment, the bushing assembly is composed of an axial bearing bushing 10, a mounting bushing 11, and a hub bushing 12. The bushing assembly is made of non-metallic bearing material, monolithically cast nylon, which solves the key corrosion resistance problem from a material perspective. Secondly, in this embodiment, drainage grooves are designed on the non-standard parts in the bushing assembly to facilitate the drainage of water and sediment, including axial drainage groove one 1004 and axial drainage groove two 1102, so that sediment can be "drained" after intrusion. At the same time, this application also solves the installation problem of the bushing assembly by utilizing the assembly structure between the axial bearing bushing 10, the mounting bushing 11, and the hub bushing 12, while also achieving the axial thrust resistance function requirement. Finally, the bushing assembly is matched with the rotating shaft 13 to meet the strength, stiffness, and stress requirements of the ground effect vehicle when traveling at low speeds on land.

[0056] Specifically, the working principle of the sliding bearing structure in this embodiment is based on two points:

[0057] Firstly, the sliding bearing used consists of a rotating shaft 13 made of metallic material and a bushing assembly made of non-metallic material. The sliding bearing replaces the existing rolling bearing (a standard component made of metallic material). Under current technology, rolling bearings are made of metallic materials and have rolling elements such as balls, cylindrical rollers, tapered rollers, and needle rollers. These numerous rolling elements support the rotating shaft through point or line motion, and the motion is rolling. Figure 1The diagram shows the structure of a conventional wheel hub assembly in the prior art. It mainly consists of a tire 1, a wheel hub 2, a wheel support 3, a conversion seat 4, a rolling bearing mounting shaft 5, a long axle shoulder 6, a sealing cover 7, rolling bearings 8, and a short axle shoulder 9. Neither the wheel hub 2 nor the rolling bearings 8 are resistant to seawater corrosion, and the sealing cover 7 only provides dust protection, not waterproofing or preventing mud and sand intrusion. Therefore, using a conventional wheel hub assembly for aircraft in water will cause the rolling bearings 8 to corrode and rust, and mud and sand will accumulate and clog the rolling bearings 8, affecting normal rotation. The installation sequence of the conventional wheel hub assembly in the prior art is: first, install the two rolling bearings 8 on the wheel hub 2. Next, the long shaft shoulder 6 and a sealing cap 7 are installed on the rolling bearing mounting shaft 5 in sequence. Then, the hub 2 with the rolling bearing 8 is installed on the rolling bearing mounting shaft 5. Then, a sealing cap 7, a short shaft shoulder, and a shaft end nut 9 are installed on the rolling bearing mounting shaft 5. Finally, the tire 1 is installed on the hub 2, completing the installation of the conventional hub assembly for aircraft. As a standard component, the rolling bearing 8 faces the predicament of corrosion and silt intrusion when used in water, especially in seawater, which can render it unusable. Moreover, the corrosion of metal materials is obvious, and the intrusion of silt will inevitably affect the use of the rolling bearing 8, which is supported by the point or line motion of rolling elements. Since aircraft (including seaplanes) are required to have the ability to take off and land on land, they all use rolling bearings 8 in their hub assemblies. Aircraft (including seaplanes) are required to take off and land on water. For seaplanes, this means that the hub assembly requires complex and cumbersome maintenance every time they take off or land, including partial disassembly, fresh water rinsing, and grease application. However, for ground effect vehicles (GEVs), which are only required to take off and land on water, resistance to seawater corrosion, waterproofing, and prevention of mud and sand intrusion are the primary considerations for the hub assembly. Obviously, using standard components like metal rolling bearings 8 to meet the requirements of the GEV hub assembly would require designing a complex protection system, which would significantly increase the cost and time of use, maintenance, and repair of the GEV, and would not achieve the desired effect. Considering the characteristics of GEVs—taking off and landing on water and not landing on land but moving slowly on land—a sliding bearing structure is adopted, consisting of a rotating shaft 13 and a bushing assembly. Since the sliding bearing has no rolling elements, it relies on the smooth surface of the bushing assembly to support the rotating shaft 13. Therefore, the contact area is a single surface, the movement is sliding, and water can be used as a lubricant. The core of sliding bearings is based on the design concept of "dredging" rather than "blocking" water and sediment. Axial drainage grooves are opened on the bushing assembly. The drainage grooves include axial drainage groove one 1004 and axial drainage groove two 1102 to facilitate the drainage of water and sediment. The disassembly and assembly structure between the bushing assemblies also solves the installation of the bushing assemblies and achieves the axial thrust resistance function requirement.The bushing assembly includes a circumferential groove 1009 on an axially bearing bushing 10 with axial thrust function, which is fitted with a circumferential boss 1303 on a rotating shaft 13. The bushing assembly is designed with a bushing 11 to accommodate the installation sequence, disassembly and connection methods, and axial drainage groove. The rotating shaft 13 only needs to consider the installation fit design of the circumferential boss 1303 for axial thrust.

[0058] Secondly, as a moving component in contact with water and sediment, the bushing assembly is made of non-metallic monolithically cast nylon (MC nylon). The water that the landing wheel system of the ground effect vehicle often comes into contact with contains sediment. If this sediment flows into the rolling bearing 8, it will clog the bearing, causing it to fail to rotate. This situation is frequently encountered in actual operation. Therefore, to avoid clogging, multiple symmetrical water grooves are opened on the inner diameter of the bushing assembly. On the one hand, this facilitates the introduction of water into the inner diameter of the sliding bearing, allowing the water to reliably lubricate the entire friction surface. On the other hand, it also allows the sediment flowing into the friction surface to be discharged from the inner diameter of the sliding bearing, flushing away the dirt. The monolithically cast nylon material is polycaprolactam, which has the properties of being lightweight, high-strength, wear-resistant, self-lubricating, corrosion-resistant, and insulating, making it particularly suitable for use as a bearing in water. The performance characteristics of the monolithically cast nylon material can meet the usage requirements of the hub device for ground effect vehicles, and it can also be customized with unique non-standard designs and processing according to usage requirements.

[0059] In this embodiment, the bushing assembly made of monolithically cast nylon material is required to have a radial length greater than its diameter. The outer diameter of the hub boss 1203 of the bushing assembly and the inner diameter of the hub 2 are fitted with an interference fit to ensure that there is no relative rotation between them. The installation methods are press-fit and freeze-fit. The inner diameter of the bushing assembly and the outer diameter of the rotating shaft 13 are fitted with a clearance fit to ensure that the bushing assembly can rotate freely around the axis of the rotating shaft 13. Since the speed of the ground effect vehicle when it enters and exits the water is very slow and the ground impact force is small, the maximum clearance fit value can be adopted after testing.

[0060] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A corrosion-resistant and anti-clogging hub device for ground effect vehicles, characterized in that: Including tires, rims, and wheel pillars; The wheel support is cylindrical and installed on the hull structure. A conversion seat is fixed at the bottom of the wheel support, and the conversion seat is assembled with the rotating shaft. A tire is mounted on the top of the wheel hub, and a bushing assembly is mounted on the bottom of the wheel hub. The bushing assembly is then fitted onto a rotating shaft, and the rotating shaft and bushing assembly work together to form a sliding bearing structure. The structure of the bushing assembly is as follows: it includes an axial bearing bushing, a mounting bushing, and a hub bushing. The hub bushing is fitted inside the hub, the mounting bushing is located inside the hub bushing, and the axial bearing bushing is mounted on the rotating shaft. The structure of the axial bearing bushing is as follows: it includes two symmetrically arranged axial bearing semi-circular split bushings. The two symmetrically arranged axial bearing semi-circular split bushings are fixedly connected by radial connecting bolts and nuts for radial fixation of the axial bearing bushing. The axial bearing bushing is fixedly connected to the hub bushing in the axial direction. The structure of a single axially bearing semi-circular split bushing includes: a radial flange, an axial flange, an axial thrust boss, an axial drain groove, a semi-circular support surface, an axial flange hole, a radial flange hole, a semi-circular hole, and a circumferential groove. The radial flange is provided with a radial flange hole, and one side of the axial flange is perpendicular to the radial flange face. The first axial flange is the mating surface between the axial bearing bush and the hub bush. The first axial flange is provided with an axial flange hole. The axial bearing bush and the hub bush are fixedly connected in the first axial flange hole by axial connecting bolts and nuts. The axial thrust boss is semi-cylindrical and is used to ensure the machining space for the axial discharge groove, the semi-circular support surface, the semi-circular hole and the circumferential groove. The semi-circular support surface is the inner hole surface of the axial bearing bushing. The semi-circular support surface is used to cooperate with the rotational support of the outer circle surface of the rotating shaft. The inner diameter of the semi-circular support surface is clearance-fitted with the outer diameter of the rotating shaft. Axial discharge groove 1 is machined on the semi-circular support surface 1. Axial discharge groove 1 corresponds one-to-one with axial discharge groove 2 on the mounting bushing. Axial discharge groove 1 and axial discharge groove 2 are used for axial water and sediment discharge. A circumferential groove is also machined on the semi-circular support surface. The circumferential groove is used to install and cooperate with the circumferential boss on the rotating shaft and to provide axial thrust. A semi-circular hole is also machined on the end face of the radial flange, and the semi-circular hole is fixedly fitted with the axial boss of the bushing. The structure of the bushing installation is as follows: it includes two symmetrical installation semicircles for disassembling the bushing. The structure of a single semi-circular split bushing includes: a semi-circular support surface II, an axial drainage groove II, an axial boss I, an axial transition platform, an axial boss II, and a radial boss. The second semicircular support surface is an inner hole surface, and an axial discharge groove is provided on the second semicircular support surface. Axial boss one and axial boss two are cylindrical structures, while the axial transition platform is a conical structure. A radial boss is provided on the outer circular surface of the middle of the axial boss two. The radial boss is used to cooperate with the radial groove on the hub bushing and restrict the rotation of the bushing.

2. The anti-corrosion and anti-clogging hub device for ground effect vehicles as described in claim 1, characterized in that: The axial bearing bushing and the hub bushing are fixedly connected by axial connecting bolts and nuts.

3. The anti-corrosion and anti-clogging hub device for ground effect vehicles as described in claim 1, characterized in that: The entire bushing assembly is made of monolithically cast nylon material.

4. The anti-corrosion and anti-clogging hub device for ground effect vehicles as described in claim 1, characterized in that: The structure of the hub bushing includes: two axial flange holes, two axial flanges, a hub boss, one axial cylindrical hole, an axial transition hole, two axial cylindrical holes, and a radial groove. Axial flange two is the mating surface connecting the hub bushing and the axial bearing bushing. Axial flange two is opened on axial flange two. The hub bushing and the axial bearing bushing are fixedly connected in axial flange two by axial connecting bolts and nuts. An interference fit is made between the hub boss and the inner diameter of the hub; Axial cylindrical hole one and axial cylindrical hole two are cylindrical hole structures, while axial transition hole is a conical hole structure. Axial cylindrical hole one, axial transition hole and axial cylindrical hole two are respectively matched one-to-one with axial boss one, axial transition platform and axial boss two on the mounting bushing.

5. The anti-corrosion and anti-clogging hub device for ground effect vehicles as described in claim 4, characterized in that: Two radial grooves are also provided at the position of the radial boss corresponding to the middle of the axial boss. The radial grooves cooperate with the radial boss on the mounting sleeve. The radial grooves cooperate with the radial boss to restrict the rotation of the mounting sleeve.

6. The anti-corrosion and anti-clogging hub device for ground effect vehicles as described in claim 4, characterized in that: Axial boss 1, axial transition platform and axial boss 2 are arranged in ascending order of diameter; The axial cylindrical hole one, axial transition hole and axial cylindrical hole two are arranged with their inner diameters increasing from small to large.

7. The anti-corrosion and anti-clogging hub device for ground effect vehicles as described in claim 1, characterized in that: The structure of the rotating shaft includes a seat shaft connecting hole, a rotating shaft body, and a circumferential boss on the shaft. The seat shaft connection hole is a bolt through hole for fixing the conversion seat and the rotating shaft; The rotating shaft is a cylindrical ring, and it is used to fix the conversion seat and install the bushing assembly. The circumferential boss on the shaft is a circumferential boss structure that is machined as one piece with the rotating shaft. The circumferential boss on the shaft is used to install and cooperate with the two circumferential grooves inside the axial bearing bush and to provide axial thrust.

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