Sealing device, steering drive axle and amphibious vehicle

Abstract

The application provides a sealing device, a steering drive axle and an amphibious vehicle, wherein the sealing device is used in connection with a drive half shaft and comprises a mounting base connected with a vehicle body, the mounting base is provided with a first mounting cavity, the drive half shaft is arranged in the first mounting cavity, one end of the mounting base is used in connection with a main reducer assembly, and one end of the drive half shaft is connected with the main reducer assembly; a bearing is arranged in the first mounting cavity, the drive half shaft is arranged in the bearing, and the drive half shaft can rotate relative to the mounting base; a plurality of sealing members are arranged in the first mounting cavity, the sealing members are arranged on the side of the bearing away from the main reducer assembly, the drive half shaft is arranged in the sealing members, the outer wall of the sealing members is in abutment with the cavity wall of the first mounting cavity, and the inner wall of the sealing members is in abutment with the circumferential side wall of the drive half shaft; and a dust cover is sleeved on the drive half shaft and arranged outside the first mounting cavity, the dust cover is in abutment with the end of the mounting base away from the main reducer assembly, so as to close the opening of the first mounting cavity away from the main reducer assembly.

Description

Technical Field

[0001] This invention relates to the field of amphibious vehicle technology, and more specifically, to a sealing device, a steering drive axle, and an amphibious vehicle. Background Technology

[0002] Amphibious vehicles can travel on both land and water. However, in related technologies, the drive axle of amphibious vehicles has poor sealing performance, making it easy for dust and other impurities to enter when traveling on land, and for water and sand to enter when traveling on water. Summary of the Invention

[0003] In order to solve or improve at least one of the above-mentioned technical problems, one object of the present invention is to provide a sealing device.

[0004] Another object of the present invention is to provide a steering drive axle having the above-described sealing device.

[0005] Another object of the present invention is to provide an amphibious vehicle having the aforementioned steering drive axle.

[0006] To achieve the above objectives, a first aspect of the present invention provides a sealing device for connection to a drive half-shaft. The sealing device includes: a mounting base for connection to a vehicle body, the mounting base having a first mounting cavity, the drive half-shaft passing through the first mounting cavity, one end of the mounting base for connection to a main reducer assembly, and one end of the drive half-shaft for connection to the main reducer assembly; a bearing disposed within the first mounting cavity, the drive half-shaft passing through the bearing, the outer wall of the bearing abutting against the cavity wall of the first mounting cavity, and the inner wall of the bearing abutting against the circumferential side wall of the drive half-shaft. The drive half-shaft can rotate relative to the mounting base; multiple seals are provided in the first mounting cavity, with the seals located on the side of the bearing away from the main reducer assembly, the drive half-shaft passing through the seals, the outer wall of the seals abutting against the cavity wall of the first mounting cavity, and the inner wall of the seals abutting against the circumferential side wall of the drive half-shaft; a dust cover is fitted onto the drive half-shaft, with the dust cover located outside the first mounting cavity, and the dust cover abutting against the end of the mounting base away from the main reducer assembly to close the opening of the first mounting cavity away from the main reducer assembly.

[0007] According to embodiments of the sealing device provided by the present invention, the combined use of the sealing element and the dust cover can achieve waterproofing, dustproofing, and sand and gravel protection, which is beneficial to improving the sealing performance between the mounting base and the drive half-shaft. It can also effectively prevent lubricant leakage, thereby improving the lubrication effect. In addition, the sealing device has the advantages of compact overall structure and high integration.

[0008] The sealing device provided by this invention is used for connection with a drive half-shaft. Specifically, the sealing device includes a mounting base, a bearing, a seal, and a dust cover. The mounting base is used for connection with the vehicle body. Optionally, the mounting base is provided with a connecting flange for connection with the vehicle body. Connecting the mounting base to the vehicle body flange facilitates installation and disassembly; it also increases the contact area between the mounting base and the vehicle body, thus improving the connection strength between the mounting base and the vehicle body in the connected state. Further, one end of the mounting base is used for connection with the main reducer assembly. The main reducer assembly is connected to the vehicle body. Further, the mounting base has a first mounting cavity. The drive half-shaft passes through the first mounting cavity. One end of the drive half-shaft is connected to the main reducer assembly. Optionally, the drive half-shaft is connected to the half-shaft gear of the main reducer assembly.

[0009] Furthermore, the bearing is disposed within the first mounting cavity. The drive half-shaft passes through the bearing. The outer wall of the bearing abuts against the cavity wall of the first mounting cavity, and the inner wall of the bearing abuts against the circumferential side wall of the drive half-shaft. Optionally, the bearing includes an inner ring layer, a ball layer, and an outer ring layer. The inner ring layer is fitted onto the drive half-shaft, the outer ring layer is fitted onto the inner ring layer, and the ball layer is disposed between the inner and outer ring layers. The outer wall of the bearing is the outer wall of the outer ring layer, and the inner wall of the bearing is the inner wall of the inner ring layer. By providing the bearing, a rotational connection between the drive half-shaft and the mounting base can be achieved.

[0010] Furthermore, the number of seals is multiple, and the seals can be flexibly configured according to actual needs. The seals are located within the first mounting cavity of the mounting base. The seals are located on the side of the bearing furthest from the main reducer assembly. The drive half-shaft passes through the seals, or the seals pass through the first mounting cavity. The outer wall of the seal abuts against the cavity wall of the first mounting cavity, and the inner wall of the seal abuts against the circumferential side wall of the drive half-shaft. By setting up the seals, a sealing function can be achieved, preventing dust, sand, and water from entering from the side of the bearing furthest from the main reducer assembly. In addition, since the seals are located on the side of the bearing furthest from the main reducer assembly, lubricant leakage is effectively prevented. Lubricant can flow between the main reducer assembly and the mounting base to improve lubrication. Optionally, the number of seals is three, and the three seals are FB-type lip seals. All three seals are located on the side of the bearing furthest from the main reducer assembly. Of the three seals, the one furthest from the main reducer assembly has its lip facing outwards (away from the main reducer assembly), primarily to prevent water, dust, sand, etc., from entering the first mounting cavity. The other two seals have their lips facing inwards (towards the main reducer assembly), mainly to seal the gear lubricant inside the main reducer assembly, preventing lubricant from flowing out from the side of the bearing furthest from the main reducer assembly, thereby improving lubrication.

[0011] Furthermore, a dust cover is fitted onto the drive half-shaft. The dust cover is located outside the first mounting cavity. The dust cover abuts against the end of the mounting base away from the main reducer assembly, thereby closing the opening of the first mounting cavity away from the main reducer assembly. Optionally, the dust cover is interference-fitted with the drive half-shaft. The dust cover can rotate together with the drive half-shaft. By providing a dust cover, dust and other impurities can be prevented from entering the first mounting cavity. When the amphibious vehicle is navigating on water, the dust cover can also block sand and gravel. The dust cover can also protect the seals inside the first mounting cavity, which helps to improve the service life of the seals.

[0012] In the technical solution defined by this invention, the combined use of the sealing element and the dust cover can achieve waterproofing, dustproofing, and sand and gravel protection, which is beneficial to improving the sealing performance between the mounting base and the drive half-shaft. It can also effectively prevent lubricant leakage, thereby improving the lubrication effect. In addition, the sealing device has the advantages of compact overall structure and high integration.

[0013] In addition, the technical solution provided by the present invention may also have the following additional technical features:

[0014] In the above technical solution, the sealing element is a lip seal ring, which has a lip. There are three sealing elements, namely a first sealing element, a second sealing element, and a third sealing element. The second sealing element is located between the first sealing element and the third sealing element. The first sealing element is located on the side of the second sealing element away from the main reducer assembly, and the third sealing element is located on the side of the second sealing element closer to the main reducer assembly. The lip of the first sealing element is away from the main reducer assembly, the lip of the second sealing element is towards the main reducer assembly, and the lip of the third sealing element is towards the main reducer assembly.

[0015] In this technical solution, by setting the seal as a lip seal, the lip of the lip seal deforms under pressure, and its lip edge closely adheres to the circumferential sidewall of the drive half-shaft or the cavity wall of the first mounting cavity, which helps to improve the sealing performance. Furthermore, the number of seals is three. The three seals are a first seal, a second seal, and a third seal. The second seal is located between the first and third seals; the first seal is located on the side of the second seal away from the main reducer assembly; and the third seal is located on the side of the second seal closer to the main reducer assembly. Among the three seals, the distances between the first seal and the main reducer assembly, the second seal and the main reducer assembly, and the third seal and the main reducer assembly decrease sequentially. Furthermore, the lip of the first seal faces away from the main reducer assembly, the lip of the second seal faces the main reducer assembly, and the lip of the third seal faces the main reducer assembly. This can be understood as follows: the lip of the seal furthest from the main reducer assembly faces away from the main reducer assembly, while the lips of the other two seals face towards the main reducer assembly. The first seal primarily prevents water, dust, sand, etc., from entering the first mounting cavity. The second and third seals primarily seal the gear lubricant within the main reducer assembly, preventing lubricant from flowing out from the side of the bearing furthest from the main reducer assembly, thus improving lubrication. The combined use of multiple seals further enhances sealing performance.

[0016] In the above technical solution, the mounting base is provided with an oil injection chamber, which is connected to the first mounting cavity and the oil injection chamber is connected to the sealing element. The sealing device also includes an oil injection cup, which is located in the oil injection chamber.

[0017] In this technical solution, the sealing device also includes a pressure-filled grease cup. Specifically, the mounting base is provided with a grease filling chamber. The grease filling chamber communicates with the first mounting chamber and with the sealing element. The pressure-filled grease cup is located within the grease filling chamber. The pressure-filled grease cup is also known as a grease nipple. The lubricant injected through the pressure-filled grease cup enters the first mounting chamber or the sealing element through the grease filling chamber. The lubricant entering the sealing element or adhering to the sealing element can reduce the wear of the sealing element and help improve its service life.

[0018] In the above technical solution, an oil injection diaphragm is provided between two adjacent seals, and the oil injection diaphragm is connected to the oil injection cavity.

[0019] In this technical solution, by setting an oil injection diaphragm, the lubricant injected from the oil cup can reach the lips of the seals located on both sides of the oil injection diaphragm. The oil injection diaphragm can also store lubricant, which helps to reduce the wear of the seals and improve their service life. Optionally, the oil injection diaphragm is located between the first seal and the second seal.

[0020] The above technical solution further includes: a first retaining ring disposed in the first mounting cavity, the first retaining ring passing through the first mounting cavity, the outer wall of the first retaining ring abutting against the cavity wall of the first mounting cavity, the first retaining ring being disposed on one side of the bearing, the side wall of the first retaining ring abutting against the bearing; a second retaining ring disposed in the first mounting cavity, the second retaining ring being sleeved on the drive half shaft, the inner wall of the second retaining ring abutting against the circumferential side wall of the drive half shaft, the second retaining ring being disposed on the other side of the bearing, the side wall of the second retaining ring abutting against the bearing.

[0021] In this technical solution, the sealing device further includes a first retaining ring and a second retaining ring. Specifically, both the first and second retaining rings are disposed within the first mounting cavity of the mounting base. The first retaining ring passes through the first mounting cavity, and the drive half-shaft passes through the first retaining ring, with the outer wall of the first retaining ring abutting against the cavity wall of the first mounting cavity. Further, the second retaining ring is sleeved on the drive half-shaft. The inner wall of the second retaining ring abuts against the circumferential side wall of the drive half-shaft. Further, the first retaining ring is disposed on one side of the bearing, and the second retaining ring is disposed on the other side of the bearing. The side wall of the first retaining ring abuts against the bearing, and the side wall of the second retaining ring abuts against the bearing. By providing the first and second retaining rings, the bearing can be axially limited. Optionally, the first retaining ring is interference-fitted with the first mounting cavity. The second retaining ring is interference-fitted with the drive half-shaft.

[0022] In the above technical solution, the cavity wall of the first mounting cavity is recessed inward to form a first mounting groove, and at least a portion of the first retaining ring is disposed in the first mounting groove; the circumferential side wall of the drive half shaft is recessed inward to form a second mounting groove, and at least a portion of the second retaining ring is disposed in the second mounting groove.

[0023] In this technical solution, by setting a first mounting groove on the cavity wall of the first mounting cavity, at least part of the first retaining ring is located in the first mounting groove. The first mounting groove can play a role in installation and positioning, and can also largely prevent the axial movement of the first retaining ring.

[0024] Furthermore, by providing a second mounting groove on the circumferential sidewall of the drive half-shaft, at least part of the second retaining ring is located in the second mounting groove. The second mounting groove can play a role in installation and positioning, and can also largely prevent the axial movement of the second retaining ring.

[0025] In the above technical solution, a connecting flange is formed at the end of the mounting base away from the main reducer assembly, and the connecting flange is connected to the vehicle body.

[0026] In this technical solution, the mounting base is connected to the vehicle body flange, which facilitates installation and disassembly. On the other hand, it increases the contact area between the mounting base and the vehicle body, which helps to improve the connection strength between the mounting base and the vehicle body in the connected state.

[0027] In the above technical solution, the connecting flange is provided with a first placement groove, and the sealing device further includes: a fourth sealing element, which is disposed in the first placement groove, the fourth sealing element abuts against the groove wall of the first placement groove, and the fourth sealing element abuts against the vehicle body.

[0028] In this technical solution, the sealing device further includes a fourth sealing element. Specifically, the connecting flange is provided with a first placement groove, and the fourth sealing element is disposed within the first placement groove. The fourth sealing element abuts against the groove wall of the first placement groove and also abuts against the vehicle body. Optionally, the fourth sealing element is an O-ring. When the fourth sealing element is compressed by the vehicle body, it deforms and fills the gap between the connecting flange and the vehicle body, which helps to improve the sealing performance between the connecting flange and the vehicle body and effectively prevents water, sand, dust, etc., from entering.

[0029] In the above technical solution, the circumferential sidewall of the mounting base is provided with a second placement groove, and the sealing device further includes: a fifth sealing element, which is disposed in the second placement groove, the fifth sealing element abuts against the groove wall of the second placement groove, and the fifth sealing element abuts against the main reducer assembly.

[0030] In this technical solution, the main reducer assembly includes a main reducer and a shaft tube. The main reducer has a main reducer housing and a half-shaft gear. The half-shaft gear is located inside the main reducer housing. The shaft tube is connected to the main reducer housing. The shaft tube is connected to a mounting base. One end of the mounting base near the main reducer assembly passes through the shaft tube. The shaft tube has a second mounting cavity. Optionally, the mounting base passes through the second mounting cavity of the shaft tube. The first mounting cavity communicates with the second mounting cavity. The drive half-shaft passes through the first mounting cavity and the second mounting cavity. One end of the drive half-shaft extends into the main reducer housing and is connected to the half-shaft gear. By providing the shaft tube, the main reducer housing can be lengthened as needed to protect the drive half-shaft. The sealing device also includes a fifth seal. Specifically, the mounting base passes through the second mounting cavity of the shaft tube. The circumferential sidewall of the mounting base is provided with a second placement groove. The fifth seal is located in the second placement groove. The fifth seal abuts against the groove wall of the second placement groove and also abuts against the cavity wall of the second mounting cavity. Optionally, the fifth seal is an O-ring. The fifth seal deforms under pressure from the shaft tube and fills the gap between the circumferential sidewall of the mounting base and the cavity wall of the second mounting cavity, thus improving the sealing performance between the mounting base and the shaft tube and effectively preventing lubricant leakage.

[0031] A second aspect of the present invention provides a steering drive axle, comprising: a main reducer assembly; a sealing device as described in any of the above embodiments, wherein the mounting base of the sealing device is connected to the main reducer assembly; a drive half-shaft, wherein a bearing is disposed in the sealing device, and one end of the drive half-shaft is connected to the main reducer assembly.

[0032] According to an embodiment of the steering drive axle of the present invention, the steering drive axle includes a main reducer assembly, a drive half-shaft, and a sealing device as described in any of the above embodiments. Specifically, the mounting seat of the sealing device is connected to the main reducer assembly. Optionally, the mounting seat is connected to the main reducer assembly via a shaft tube. The drive half-shaft passes through a bearing of the sealing device. One end of the drive half-shaft is connected to the main reducer assembly. Optionally, the main reducer assembly is used to connect to a power transmission shaft. The power transmission shaft transmits torque to the drive half-shaft through the main reducer assembly. The main reducer assembly includes a main reducer and a shaft tube. The main reducer has a main reducer housing and a half-shaft gear. The half-shaft gear is disposed within the main reducer housing. The shaft tube is connected to the main reducer housing. The shaft tube is connected to the mounting seat. One end of the mounting seat near the main reducer assembly passes through the shaft tube. The shaft tube has a second mounting cavity. Optionally, the mounting seat passes through the second mounting cavity of the shaft tube. The first mounting cavity communicates with the second mounting cavity. The drive half-shaft passes through the first mounting cavity and the second mounting cavity. One end of the drive half-shaft extends into the main reducer housing and connects to the half-shaft gear. By installing a shaft tube, the main reducer housing can be lengthened as needed to protect the drive half-shaft.

[0033] Since the steering drive axle includes any of the sealing devices described in the first aspect, it has the beneficial effects of any of the above embodiments, which will not be elaborated further here.

[0034] The above technical solution also includes: a wheel-side reducer, which is connected to the other end of the drive half-shaft.

[0035] In this technical solution, the steering drive axle also includes a wheel-side reducer. Specifically, the wheel-side reducer is connected to the other end of the drive half-shaft. Optionally, the wheel-side reducer is used to connect to a wheel axle on which a wheel is mounted. The drive half-shaft transmits torque to the wheel axle through the wheel-side reducer.

[0036] A third aspect of the present invention provides an amphibious vehicle, comprising: a vehicle body; a steering drive axle in any of the above embodiments, wherein the main reducer assembly of the steering drive axle is connected to the vehicle body, and the mounting seat of the sealing device of the steering drive axle is connected to the vehicle body.

[0037] According to an embodiment of the amphibious vehicle of the present invention, the amphibious vehicle includes a vehicle body and a steering drive axle as described in any of the above embodiments. The main reduction gear assembly of the steering drive axle is connected to the vehicle body. The mounting seat of the sealing device of the steering drive axle is connected to the vehicle body. The vehicle body can be understood as a monocoque chassis. The vehicle body serves to support and mount the carrier.

[0038] Additional aspects and advantages of embodiments of the present invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0039] Figure 1A schematic diagram of a sealing device according to an embodiment of the present invention is shown;

[0040] Figure 2 A schematic diagram of a steering drive axle according to an embodiment of the present invention is shown;

[0041] Figure 3 A schematic diagram of an amphibious vehicle according to an embodiment of the present invention is shown.

[0042] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0043] 100: Sealing device; 110: Mounting base; 111: First mounting cavity; 1111: First mounting groove; 112: Oil filling cavity; 113: Connecting flange; 1131: First placement groove; 114: Second placement groove; 120: Bearing; 131: First seal; 132: Second seal; 133: Third seal; 134: Lip; 140: Dust cover; 150: Pressure oil cup; 160: Oil filling diaphragm; 71: First retaining ring; 172: Second retaining ring; 181: Fourth seal; 182: Fifth seal; 183: Double-ended bolt; 184: Cap nut; 200: Steering drive axle; 210: Main reducer assembly; 211: Main reducer; 212: Shaft tube; 213: Second mounting cavity; 220: Drive half shaft; 221: Second mounting groove; 230: Wheel-side reducer; 300: Amphibious vehicle; 310: Vehicle body. Detailed Implementation

[0044] To better understand the above-described objectives, features, and advantages of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0045] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, embodiments of the invention may be implemented in other ways different from those described herein. Therefore, the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0046] The following reference Figures 1 to 3 The sealing device 100, the steering drive axle 200, and the amphibious vehicle 300 are described according to some embodiments of the present invention.

[0047] Example 1

[0048] like Figure 1As shown, an embodiment of the present invention provides a sealing device 100 for connection with a drive half-shaft 220. The sealing device 100 includes a mounting base 110, a bearing 120, a seal, and a dust cover 140. The mounting base 110 is used to connect with a vehicle body 310. Optionally, the mounting base 110 is provided with a connecting flange 113 for connection with the vehicle body 310. The flange connection between the mounting base 110 and the vehicle body 310 facilitates installation and disassembly; it also increases the contact area between the mounting base 110 and the vehicle body 310, thus improving the connection strength between them in the connected state. Further, one end of the mounting base 110 is used to connect with a main reducer assembly 210. The main reducer assembly 210 is connected to the vehicle body 310. Further, the mounting base 110 is provided with a first mounting cavity 111. The drive half-shaft 220 passes through the first mounting cavity 111. One end of the drive half-shaft 220 is connected to the main reducer assembly 210. Optionally, the drive half-shaft 220 is connected to the half-shaft gear of the main reducer assembly 210.

[0049] Furthermore, the bearing 120 is disposed within the first mounting cavity 111. The drive half-shaft 220 passes through the bearing 120. The outer wall of the bearing 120 abuts against the cavity wall of the first mounting cavity 111, and the inner wall of the bearing 120 abuts against the circumferential side wall of the drive half-shaft 220. Optionally, the bearing 120 includes an inner ring layer, a ball layer, and an outer ring layer. The inner ring layer is fitted onto the drive half-shaft 220, the outer ring layer is fitted onto the inner ring layer, and the ball layer is disposed between the inner ring layer and the outer ring layer. The outer wall of the bearing 120 is the outer wall of the outer ring layer, and the inner wall of the bearing 120 is the inner wall of the inner ring layer. By providing the bearing 120, a rotatable connection between the drive half-shaft 220 and the mounting base 110 can be achieved.

[0050] Furthermore, the number of seals is multiple, and the seals can be flexibly set according to actual needs. The seals are located within the first mounting cavity 111 of the mounting base 110. The seals are located on the side of the bearing 120 away from the main reducer assembly 210. The drive half-shaft 220 passes through the seals, or the seals pass through the first mounting cavity 111. The outer wall of the seal abuts against the cavity wall of the first mounting cavity 111, and the inner wall of the seal abuts against the circumferential side wall of the drive half-shaft 220. By setting the seals, a sealing function can be achieved, preventing dust, sand, and water from entering from the side of the bearing 120 away from the main reducer assembly 210. In addition, since the seals are located on the side of the bearing 120 away from the main reducer assembly 210, lubricant leakage is effectively prevented. Lubricant can flow between the main reducer assembly 210 and the mounting base 110 to improve lubrication. Optionally, the number of seals is three, and the three seals are FB-type lip seals. All three seals are located on the side of the bearing 120 furthest from the main reducer assembly 210. The lip 134 of the seal furthest from the main reducer assembly 210 faces outwards (away from the main reducer assembly 210), primarily to prevent water, dust, sand, etc., from entering the first mounting cavity 111. The lips 134 of the other two seals face inwards (towards the main reducer assembly 210), primarily to seal the gear lubricant within the main reducer assembly 210, preventing lubricant from flowing out from the side of the bearing 120 furthest from the main reducer assembly 210, thereby improving lubrication.

[0051] Furthermore, a dust cover 140 is fitted onto the drive half-shaft 220. The dust cover 140 is located outside the first mounting cavity 111. The dust cover 140 abuts against the end of the mounting base 110 away from the main reducer assembly 210, thereby closing the opening of the first mounting cavity 111 away from the main reducer assembly 210. Optionally, the dust cover 140 is interference-fitted with the drive half-shaft 220. The dust cover 140 can rotate together with the drive half-shaft 220. By providing the dust cover 140, dust and other impurities can be prevented from entering the first mounting cavity 111. When the amphibious vehicle 300 is navigating on water, the dust cover 140 can also block sand and gravel. The dust cover 140 can also protect the seals inside the first mounting cavity 111, which helps to improve the service life of the seals.

[0052] In the technical solution defined by this invention, the cooperation between the sealing element and the dust cover 140 can achieve the functions of waterproofing, dustproofing, and sand and gravel prevention, which is beneficial to improving the sealing performance between the mounting base 110 and the drive half shaft 220, and can also effectively prevent lubricant leakage, thereby improving the lubrication effect. In addition, the sealing device 100 has the advantages of compact overall structure and high integration.

[0053] In another embodiment, a connecting flange 113 is formed at the end of the mounting base 110 away from the main reducer assembly 210, and the connecting flange 113 is connected to the vehicle body 310. The flange connection between the mounting base 110 and the vehicle body 310 facilitates installation and disassembly; on the other hand, it increases the contact area between the mounting base 110 and the vehicle body 310, which helps to improve the connection strength between the mounting base 110 and the vehicle body 310 in the connected state.

[0054] Example 2

[0055] like Figure 1 As shown, the seal is a lip seal ring with a lip 134. By setting the seal as a lip seal ring, the lip 134 of the lip seal ring is deformed under pressure, and its lip edge is in close contact with the circumferential side wall of the drive half shaft 220 or the cavity wall of the first mounting cavity 111, which helps to improve the sealing performance.

[0056] Furthermore, such as Figure 1 As shown, there are three seals. The three seals are a first seal 131, a second seal 132, and a third seal 133. The second seal 132 is located between the first seal 131 and the third seal 133. The first seal 131 is located on the side of the second seal 132 furthest from the main reducer assembly 210, and the third seal 133 is located on the side of the second seal 132 closest to the main reducer assembly 210. The distances between the first seal 131 and the main reducer assembly 210, the second seal 132 and the main reducer assembly 210, and the third seal 133 and the main reducer assembly 210 decrease sequentially. Furthermore, the lip 134 of the first seal 131 faces away from the main reducer assembly 210, the lip 134 of the second seal 132 faces the main reducer assembly 210, and the lip 134 of the third seal 133 faces the main reducer assembly 210. This can be understood as follows: the lip 134 of the seal furthest from the main reducer assembly 210 faces away from the main reducer assembly 210, while the lips 134 of the other two seals face towards the main reducer assembly 210. The first seal 131 is mainly used to prevent water, dust, sand, etc., from entering the first mounting cavity 111. The second seal 132 and the third seal 133 are mainly used to seal the gear lubricant inside the main reducer assembly 210, preventing the lubricant from flowing out from the side of the bearing 120 away from the main reducer assembly 210, thereby improving the lubrication effect. The coordinated use of multiple seals helps to further improve the sealing performance.

[0057] Example 3

[0058] like Figure 1As shown, the sealing device 100 also includes a pressure-filled grease cup 150. Specifically, the mounting base 110 is provided with a grease filling chamber 112. The grease filling chamber 112 communicates with the first mounting chamber 111 and with the sealing element. The pressure-filled grease cup 150 is disposed within the grease filling chamber 112. The pressure-filled grease cup 150 is also called a grease nipple. The lubricant injected through the pressure-filled grease cup 150 enters the first mounting chamber 111 or the sealing element through the grease filling chamber 112. The lubricant entering the sealing element or adhering to the sealing element can reduce the wear of the sealing element and help improve the service life of the sealing element.

[0059] Furthermore, an oil-filling septum 160 is provided between two adjacent seals, and the oil-filling septum 160 communicates with the oil-filling cavity 112. By providing the oil-filling septum 160, the lubricant injected from the oil cup can reach the lips 134 of the seals located on both sides of the oil-filling septum 160. The oil-filling septum 160 can also store lubricant, which helps reduce wear on the seals and improve their lifespan. Optionally, the oil-filling septum 160 is located between the first seal 131 and the second seal 132.

[0060] Example 4

[0061] like Figure 1 As shown, the sealing device 100 also includes a first retaining ring 171 and a second retaining ring 172. Specifically, both the first retaining ring 171 and the second retaining ring 172 are disposed within the first mounting cavity 111 of the mounting base 110. The first retaining ring 171 passes through the first mounting cavity 111, and the drive half-shaft 220 passes through the first retaining ring 171, with the outer wall of the first retaining ring 171 abutting against the cavity wall of the first mounting cavity 111. Further, the second retaining ring 172 is sleeved on the drive half-shaft 220. The inner wall of the second retaining ring 172 abuts against the circumferential side wall of the drive half-shaft 220. Further, the first retaining ring 171 is disposed on one side of the bearing 120, and the second retaining ring 172 is disposed on the other side of the bearing 120. The side wall of the first retaining ring 171 abuts against the bearing 120, and the side wall of the second retaining ring 172 abuts against the bearing 120. By providing the first retaining ring 171 and the second retaining ring 172, the bearing 120 can be axially limited. Optionally, the first retaining ring 171 is interference-fitted with the first mounting cavity 111. The second retaining ring 172 is interference-fitted with the drive half-shaft 220.

[0062] Example 5

[0063] like Figure 1As shown, the cavity wall of the first mounting cavity 111 is recessed inward to form a first mounting groove 1111, and at least a portion of the first retaining ring 171 is disposed within the first mounting groove 1111. By providing the first mounting groove 1111 on the cavity wall of the first mounting cavity 111, and at least a portion of the first retaining ring 171 being disposed within the first mounting groove 1111, the first mounting groove 1111 can serve as a mounting and positioning mechanism, and can also largely prevent the axial movement of the first retaining ring 171.

[0064] In another embodiment, the circumferential sidewall of the drive half-shaft 220 is recessed inward to form a second mounting groove 221, and at least a portion of the second retaining ring 172 is disposed within the second mounting groove 221. By providing a second mounting groove 221 on the circumferential sidewall of the drive half-shaft 220, and at least a portion of the second retaining ring 172 being disposed within the second mounting groove 221, the second mounting groove 221 can serve as a mounting and positioning mechanism, and can also largely prevent axial movement of the second retaining ring 172.

[0065] Example 6

[0066] like Figure 1 As shown, the sealing device 100 also includes a fourth sealing element 181. Specifically, the connecting flange 113 is provided with a first placement groove 1131, and the fourth sealing element 181 is disposed within the first placement groove 1131. The fourth sealing element 181 abuts against the groove wall of the first placement groove 1131 and also abuts against the vehicle body 310. Optionally, the fourth sealing element 181 is an O-ring. After being squeezed by the vehicle body 310, the fourth sealing element 181 deforms and fills the gap between the connecting flange 113 and the vehicle body 310, which helps to improve the sealing performance between the connecting flange 113 and the vehicle body 310 and effectively prevents water, sand, dust, etc. from entering.

[0067] Furthermore, the main reducer assembly 210 includes a main reducer 211 and a shaft tube 212. The main reducer 211 has a main reducer housing and a half-shaft gear. The half-shaft gear is disposed within the main reducer housing. The shaft tube 212 is connected to the main reducer housing. The shaft tube 212 has a second mounting cavity 213. Optionally, a mounting seat 110 passes through the second mounting cavity 213. The first mounting cavity 111 communicates with the second mounting cavity 213. The drive half-shaft 220 passes through the first mounting cavity 111 and the second mounting cavity 213. One end of the drive half-shaft 220 extends into the main reducer housing and is connected to the half-shaft gear. By providing the shaft tube 212, the main reducer housing can be lengthened as needed to protect the drive half-shaft 220.

[0068] Furthermore, the sealing device 100 also includes a fifth sealing element 182. Specifically, the mounting base 110 passes through the second mounting cavity 213 of the shaft tube 212. The circumferential sidewall of the mounting base 110 is provided with a second placement groove 114. The fifth sealing element 182 is disposed in the second placement groove 114. The fifth sealing element 182 abuts against the groove wall of the second placement groove 114 and also abuts against the cavity wall of the second mounting cavity 213. Optionally, the fifth sealing element 182 is an O-ring. After being squeezed by the shaft tube 212, the fifth sealing element 182 deforms and fills the gap between the circumferential sidewall of the mounting base 110 and the cavity wall of the second mounting cavity 213, which helps to improve the sealing performance between the mounting base 110 and the shaft tube 212 and effectively prevents lubricant leakage.

[0069] In another embodiment, such as Figure 1 As shown, the sealing device 100 also includes a double-ended bolt 183 and a cap nut 184. Specifically, one end of the double-ended bolt 183 passes sequentially through the connecting flange 113, the vehicle body 310, and the axle tube 212. The cap nut 184 is threadedly connected to the other end of the double-ended bolt 183. Through the cooperation of the double-ended bolt 183 and the cap nut 184, a detachable connection is achieved between the mounting base 110 and the vehicle body 310, as well as a detachable connection is achieved between the axle tube 212 and the vehicle body 310.

[0070] Example 7

[0071] like Figure 2 As shown, the steering drive axle 200 includes a main reducer assembly 210, a drive half-shaft 220, and a sealing device 100 as described in any of the above embodiments. Specifically, the mounting base 110 of the sealing device 100 is connected to the main reducer assembly 210. Optionally, the mounting base 110 is connected to the main reducer assembly 210 via a shaft tube 212. The drive half-shaft 220 passes through a bearing 120 of the sealing device 100. One end of the drive half-shaft 220 is connected to the main reducer assembly 210. Optionally, the main reducer assembly 210 is used to connect to a power transmission shaft. The power transmission shaft transmits torque to the drive half-shaft 220 through the main reducer assembly 210.

[0072] Furthermore, the steering drive axle 200 also includes a wheel-end reducer 230. Specifically, the wheel-end reducer 230 is connected to the other end of the drive half-shaft 220. Optionally, the wheel-end reducer 230 is used to connect to a wheel axle on which a wheel is mounted. The drive half-shaft 220 transmits torque to the wheel axle through the wheel-end reducer 230.

[0073] Optionally, the main reducer assembly 210 includes a main reducer 211 and a shaft tube 212. The main reducer 211 has a main reducer housing and a half-shaft gear. The half-shaft gear is disposed within the main reducer housing. The shaft tube 212 is connected to the main reducer housing. The shaft tube 212 has a second mounting cavity 213. Optionally, a mounting seat 110 passes through the second mounting cavity 213. The first mounting cavity 111 communicates with the second mounting cavity 213. The drive half-shaft 220 passes through the first mounting cavity 111 and the second mounting cavity 213. One end of the drive half-shaft 220 extends into the main reducer housing and is connected to the half-shaft gear. By providing the shaft tube 212, the main reducer housing can be lengthened as needed to protect the drive half-shaft 220.

[0074] Example 8

[0075] like Figure 3 As shown, an embodiment of the present invention provides an amphibious vehicle 300, including a vehicle body 310 and a steering drive axle 200 as described in any of the above embodiments. The main reducer assembly 210 of the steering drive axle 200 is connected to the vehicle body 310. The mounting seat 110 of the sealing device 100 of the steering drive axle 200 is connected to the vehicle body 310. The vehicle body 310 can be understood as a monocoque chassis. The vehicle body 310 serves to support and mount the carrier.

[0076] Example 9

[0077] The vehicle body 310 has dedicated machining fixtures for mounting the main reducer assembly 210 and the sealing device 100, ensuring the accuracy of the mounting hole positions. During installation, the main reducer assembly 210 is first connected to the vehicle body 310 using connectors. Then, the sealing device 100 is assembled with the drive half-shaft 220. One end of the drive half-shaft 220 is then inserted into the main reducer assembly. The mounting seat 110 of the sealing device 100 passes through the vehicle body 310 and is inserted into the corresponding mounting positioning stop of the main reducer assembly 210. After installation, the mounting seat 110 is secured with double-ended bolts 183, sealing washers, and cap nuts 184, completing the installation of one side of the sealing device 100. The installation of the other side is then completed.

[0078] The dust cover 140 is fitted onto the drive half-shaft 220, and the dust cover 140 and the drive half-shaft 220 are interference-fitted. The dust cover 140 can rotate together with the drive half-shaft 220. The relative position of the drive half-shaft 220 and the mounting base 110 is fixed, so the relative positions of the dust cover 140 and the mounting base 110 in several directions during rotation can be designed to be small. This design provides excellent dust protection when the amphibious vehicle 300 is traveling on land, and can also block sand and gravel when navigating on water, protecting the rotating shaft lip seal (seal) from damage and improving its service life.

[0079] The sealing device 100 includes three FB-type rotary shaft lip seals (three seals, namely the first seal 131, the second seal 132, and the third seal 133). The first seal 131 is primarily for waterproofing. The second seal 132 and the third seal 133 are primarily used to seal the gear lubricating oil within the main reducer assembly 210.

[0080] The drive half-shaft 220 is mounted radially and axially via bearings 120 and mounting base 110. Mounting base 110 is directly connected to the corresponding mounting and positioning stop of the main reducer assembly 210. The drive half-shaft 220 can be smoothly inserted into the spline of the half-shaft gear of the main reducer assembly 210, achieving accurate radial positioning. In the axial direction, the first retaining ring 171 and the second retaining ring 172 limit the axial position of the bearing 120, thereby limiting the axial movement of the drive half-shaft 220, achieving high-speed and stable rotation of the drive half-shaft 220, reducing wear on the seals, and extending its service life.

[0081] The sealing device 100 also includes two O-rings (a fourth seal 181 and a fifth seal 182), which prevent water from entering the vehicle body 310 and also prevent lubricant leakage. The sealing device 100 provided by the present invention can be disassembled as a whole from the vehicle body 310 and the drive half-shaft 220, which facilitates maintenance.

[0082] According to embodiments of the sealing device, steering drive axle, and amphibious vehicle of the present invention, the seal, in conjunction with the dust cover, provides waterproofing, dustproofing, and sand and gravel protection, which improves the sealing performance between the mounting base and the drive half-shaft and effectively prevents lubricant leakage, thereby enhancing lubrication. Furthermore, the sealing device boasts advantages such as a compact overall structure and high integration.

[0083] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be 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 invention according to the specific circumstances.

[0084] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0085] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0086] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A sealing device, characterized in that, For connection with the drive half-shaft (220), the sealing device includes: Mounting seat (110) for connection with vehicle body (310), the mounting seat (110) is provided with a first mounting cavity (111), the drive half shaft (220) passes through the first mounting cavity (111), one end of the mounting seat (110) is used to connect with the main reducer assembly (210), and lubricant can flow between the main reducer assembly (210) and the mounting seat (110), one end of the drive half shaft (220) is connected to the main reducer assembly (210); A bearing (120) is disposed in the first mounting cavity (111). The drive half shaft (220) passes through the bearing (120). The outer wall of the bearing (120) abuts against the cavity wall of the first mounting cavity (111), and the inner wall of the bearing (120) abuts against the circumferential side wall of the drive half shaft (220). The drive half shaft (220) is rotatable relative to the mounting base (110). Multiple seals are disposed in the first mounting cavity (111). The seals are disposed on the side of the bearing (120) away from the main reducer assembly (210). The drive half shaft (220) passes through the seals. The outer wall of the seals abuts against the cavity wall of the first mounting cavity (111), and the inner wall of the seals abuts against the circumferential side wall of the drive half shaft (220). A dust cover (140) is sleeved on the drive half shaft (220). The dust cover (140) is located outside the first mounting cavity (111). The dust cover (140) abuts against the end of the mounting base (110) away from the main reducer assembly (210). The dust cover (140) and the drive half shaft (220) are interference-fitted to close the opening of the end of the first mounting cavity (111) away from the main reducer assembly (210). The sealing element is a lip seal ring, which has a lip (134). There are three sealing elements, namely a first sealing element (131), a second sealing element (132), and a third sealing element (133). The second sealing element (132) is located between the first sealing element (131) and the third sealing element (133), and the first sealing element (131) is located away from the main reducer assembly from the second sealing element (132). On one side of (210), the third seal (133) is disposed on the side of the second seal (132) near the main reducer assembly (210), the lip (134) of the first seal (131) is away from the main reducer assembly (210), the lip (134) of the second seal (132) is facing the main reducer assembly (210), and the lip (134) of the third seal (133) is facing the main reducer assembly (210); The second seal (132) and the third seal (133) are used to seal the gear lubricant in the main reducer assembly (210); The mounting base (110) is provided with an oil injection chamber (112), which communicates with the first mounting chamber (111) and is also communicated with the sealing element. The sealing device further includes: An oil injection cup (150) is disposed within the oil injection chamber (112); An oil injection septum (160) is provided between two adjacent seals. The oil injection septum (160) is connected to the oil injection chamber (112). The oil injection septum (160) is located between the first seal (131) and the second seal (132).

2. The sealing device according to claim 1, characterized in that, Also includes: A first retaining ring (171) is disposed in the first mounting cavity (111). The first retaining ring (171) passes through the first mounting cavity (111). The outer wall of the first retaining ring (171) abuts against the cavity wall of the first mounting cavity (111). The first retaining ring (171) is disposed on one side of the bearing (120). The side wall of the first retaining ring (171) abuts against the bearing (120). The second retaining ring (172) is disposed in the first mounting cavity (111). The second retaining ring (172) is sleeved on the drive half shaft (220). The inner wall of the second retaining ring (172) abuts against the circumferential side wall of the drive half shaft (220). The second retaining ring (172) is disposed on the other side of the bearing (120). The side wall of the second retaining ring (172) abuts against the bearing (120).

3. The sealing device according to claim 2, characterized in that, The cavity wall of the first mounting cavity (111) is recessed inward to form a first mounting groove (1111), and at least a portion of the first retaining ring (171) is disposed in the first mounting groove (1111); the circumferential sidewall of the drive half shaft (220) is recessed inward to form a second mounting groove (221), and at least a portion of the second retaining ring (172) is disposed in the second mounting groove (221).

4. The sealing device according to claim 1, characterized in that, A connecting flange (113) is formed at one end of the mounting base (110) away from the main reducer assembly (210), and the connecting flange (113) is connected to the vehicle body (310).

5. The sealing device according to claim 4, characterized in that, The connecting flange (113) is provided with a first placement groove (1131), and the sealing device further includes: A fourth seal (181) is disposed in the first placement groove (1131), the fourth seal (181) abuts against the groove wall of the first placement groove (1131), and the fourth seal (181) abuts against the vehicle body (310).

6. The sealing device according to claim 5, characterized in that, The mounting base (110) has a second placement groove (114) on its circumferential sidewall, and the sealing device further includes: The fifth seal (182) is disposed in the second placement groove (114), the fifth seal (182) abuts against the groove wall of the second placement groove (114), and the fifth seal (182) abuts against the main reducer assembly (210).

7. A steering drive axle, characterized in that, include: Main reducer assembly (210); The sealing device as described in any one of claims 1 to 6, wherein the mounting base (110) of the sealing device is connected to the main reducer assembly (210); A drive half-shaft (220) is installed in the bearing (120) of the sealing device, and one end of the drive half-shaft (220) is connected to the main reducer assembly (210).

8. The steering drive axle according to claim 7, characterized in that, Also includes: The wheel-side reducer (230) is connected to the other end of the drive half-shaft (220).

9. An amphibious vehicle, characterized in that, include: Vehicle body (310); The steering drive axle as described in claim 7 or 8, wherein the main reducer assembly (210) of the steering drive axle is connected to the vehicle body (310), and the mounting seat (110) of the sealing device of the steering drive axle is connected to the vehicle body (310).

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