Middle supporting structure of transmission shaft and vehicle

Abstract

The utility model provides a middle supporting structure of a transmission shaft. The middle supporting structure comprises a connecting shaft, a sealing bearing, a sealing structure and a water absorption assembly which are connected. The connecting shaft penetrates through the sealing bearing, the water absorption assembly is arranged on the periphery of the connecting shaft in a sleeving mode and abuts against the sealing bearing, one end of the sealing structure is located on the periphery of the sealing bearing, and the other end of the sealing structure is located on the periphery of the water absorption assembly. The water absorption assembly can absorb muddy water which is not blocked by the sealing structure so that the muddy water can be prevented from making contact with the sealing bearing, the sealing bearing has the sealing performance and isolates contact of external muddy water or impurities, multiple protection on the sealing bearing is achieved, the external muddy water or impurities are isolated from the sealing bearing to the maximum extent, and the service life of the sealing bearing is prolonged. And therefore, the conditions of abnormal sound and shaking of the sealing bearing in the use process due to the influence of muddy water or sundries are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to an intermediate supporting structure of a transmission shaft and a vehicle. Background Art

[0002] During the operation of the vehicle, external mud, water or debris enters the drive shaft and the bearings of the intermediate support structure connected to the drive shaft, causing the bearings of the intermediate support structure to fail. When the drive shaft rotates, the bearings make abnormal noises and shake. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide an intermediate support structure of a transmission shaft and a vehicle to solve the problem of abnormal noise and vibration of the bearing when the transmission shaft rotates.

[0004] Based on the above purpose, the utility model provides an intermediate support structure of a transmission shaft, including a connecting shaft, a sealed bearing, a sealing structure and a water absorption component connected to each other;

[0005] The connecting shaft passes through the sealing bearing, the water absorbing component is sleeved on the periphery of the connecting shaft and abuts against the sealing bearing, one end of the sealing structure is located on the periphery of the sealing bearing, and the other end is located on the periphery of the water absorbing component.

[0006] Furthermore, the sealing structure includes a first sealing cover and a second sealing cover, the first sealing cover is sleeved on the periphery of the water absorption component, and its opening is arranged toward the sealing bearing; the second sealing cover is sleeved on the periphery of the sealing bearing, and a bending portion is provided at one end close to the first sealing cover, and the bending portion is located in the first sealing cover, and forms a C-shaped channel with the first sealing cover to prevent foreign matter from entering.

[0007] Furthermore, the cross section of the inlet section of the C-shaped channel is a bell-mouth, and the small-diameter end thereof is arranged close to the sealing bearing, and the outlet of the C-shaped channel is arranged toward the water absorption component.

[0008] Furthermore, the second sealing cover has a concave structure, which is connected to the bent portion and is disposed close to the water absorbing component.

[0009] Furthermore, a side of the concave structure close to the bending portion is an inclined surface, and a water leakage hole is provided on the inclined surface.

[0010] Furthermore, the intermediate support structure also includes a dust cover, which is sleeved on the periphery of the connecting shaft, with its opening arranged toward the first sealing cover, and is located on the same side of the sealing bearing as the first sealing cover.

[0011] Furthermore, a protrusion is provided at one end of the water absorption component away from the sealing bearing, and the first sealing cover abuts against the protrusion.

[0012] Furthermore, the water absorbing component includes a connecting member and a water absorbing member, the connecting member is sleeved on the periphery of the connecting shaft, and the water absorbing member is located on the outer surface of the connecting member and is arranged close to the sealing bearing.

[0013] Furthermore, the sealing structure and the water absorbing assembly are provided on both sides of the sealed bearing, and the dimensions of the connection between the sealing structure and the water absorbing assembly and their corresponding connecting shafts are adapted.

[0014] Based on the same inventive concept, the present application also provides a vehicle, comprising the intermediate support structure as described above.

[0015] From the above description, it can be seen that the utility model provides an intermediate support structure of a transmission shaft, which is achieved by sleeved a water absorption component on the periphery of the connecting shaft and arranged close to the sealed bearing, and a sealing structure is sleeved on the periphery of the water absorption component and the sealed bearing, so as to seal the sealed bearing and the water absorption component to prevent debris and muddy water from contacting the sealed bearing, wherein the water absorption component can absorb muddy water not blocked by the sealing structure to avoid muddy water from contacting the sealed bearing, and the sealed bearing itself has a sealing performance to isolate it from external muddy water or debris, thereby achieving multiple protections for the sealed bearing, maximally isolating external muddy water or debris from contacting the sealed bearing, and thereby avoiding abnormal noise and shaking of the sealed bearing during use due to the influence of muddy water or debris. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of a two-section rear axle drive shaft;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the intermediate support structure in the prior art;

[0019] Figure 3 This is a schematic cross-sectional view of the intermediate support structure in an embodiment of the present utility model;

[0020] Figure 4 It is a schematic cross-sectional structure diagram of the sealing structure of an embodiment of the utility model.

[0021] In the figure: 01, transmission shaft; 02, intermediate support structure;

[0022] 10. Connecting shaft; 20. Sealed bearing; 30. Sealing structure; 31. First sealing cover; 32. Second sealing cover; 321. Bending portion; 322. Concave structure; 3221. Inclined surface; 33. C-shaped channel; 331. Inlet section; 40. Water absorption component; 41. Connecting piece; 42. Water absorption piece; 43. Protrusion; 50. Dust cover; 51. Bending end; 60. Rubber sleeve; 70. Bracket. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the utility model should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] In the prior art, the rear axle drive shaft structure of a vehicle generally includes one-stage, two-stage and three-stage structures, among which the two-stage structure is the most common (such as Figure 1 As shown in the figure, the two-section rear axle drive shaft structure includes two sections of shaft tubes (i.e., drive shaft 01), three universal joint assemblies and an intermediate support structure 02. The intermediate support structure 02 is used to connect the two sections of shaft tubes and is connected to the vehicle chassis to support the rear axle drive structure. Therefore, the intermediate support structure 02 is of vital importance to the rear axle drive shaft structure.

[0026] However, the rear axle drive shaft structure is arranged on the vehicle chassis and is usually exposed, that is, the rear axle drive shaft is directly exposed to the outside. When the vehicle encounters harsh road conditions, stones and mud on the road surface will directly contact the rear axle drive shaft. If the vehicle frequently drives on harsh road conditions for a long time, mud and sand will remain in the middle support structure of the rear axle drive shaft and eventually enter the middle support bearing, affecting the lubrication and normal operation of the bearing, causing abnormal noise or shaking of the middle support, and causing vehicle NVH (Noise, Vibration, Harshness) problems.

[0027] In the prior art, such as Figure 2 As shown, the sealing performance of the intermediate support structure 02 is limited, and only two dust covers 50 are provided to protect the sealed bearing 20. Although the intermediate support structure 02 is sealed to a certain extent, as the vehicle travels longer distances, mud, sand and other debris may still enter the bearing, causing abnormal noise or vibration in the intermediate support structure 02.

[0028] Based on this, the present application provides an intermediate support structure 02 of a transmission shaft to strengthen the sealing protection of the sealed bearing 20 and prevent debris such as mud and sand from entering the interior of the bearing.

[0029] Hereinafter, one or more specific embodiments of the present application are described in detail through specific embodiments.

[0030] like Figure 3 As shown, the present application provides an intermediate support structure 02 of a transmission shaft, comprising a connecting shaft 10, a sealing bearing 20, a sealing structure 30 and a water absorption component 40 connected to each other;

[0031] The connecting shaft 10 is arranged through the sealing bearing 20, the water absorption component 40 is sleeved on the outer periphery of the connecting shaft 10 and abuts against the sealing bearing 20, one end of the sealing structure 30 is located on the outer periphery of the sealing bearing 20, and the other end thereof is located on the outer periphery of the water absorption component 40.

[0032] Specifically, the connecting shaft 10 passes through the sealed bearing 20, and the two ends of the connecting shaft 10 are respectively connected to two transmission shafts. The connecting shaft 10 can rotate relative to the sealed bearing 20, but cannot move relative to the sealed bearing 20. The connecting shaft 10 can be a spline shaft, which is convenient for connecting with both the transmission shaft and the sealed bearing 20.

[0033] The intermediate support structure 02 is used to connect two transmission shafts and realize transmission. The sealing structure 30 is sleeved on the periphery of the connection between the sealing bearing 20 and the connecting shaft 10 to prevent foreign matter or muddy water from entering the sealing bearing 20 through the connection and affecting the normal operation of the intermediate support structure 02. The water absorption component 40 is sleeved on the periphery of the connecting shaft 10 and is arranged in contact with the sealing bearing 20, that is, the water absorption component 40 is located on the channel for muddy water to enter the sealing bearing 20 to absorb the muddy water that is about to enter the sealing bearing 20, thereby preventing muddy water from entering the sealing bearing 20 and affecting the normal operation of the sealing bearing 20.

[0034] In this embodiment, the water absorption component 40 is sleeved on the periphery of the connecting shaft 10 and is arranged close to the sealed bearing 20, and the sealing structure 30 is sleeved on the periphery of the water absorption component 40 and the sealed bearing 20, so that the sealed bearing 20 and the water absorption component 40 are sealed to prevent debris and muddy water from contacting the sealed bearing 20, wherein the water absorption component 40 can absorb muddy water, slurry, water droplets and water vapor that are not blocked by the sealing structure 30 to avoid muddy water from contacting the sealed bearing 20, and the sealed bearing 20 itself has a sealing performance to isolate it from external muddy water or debris, thereby achieving multiple protections for the sealed bearing 20, maximally isolating external muddy water or debris from contacting the sealed bearing 20, and thereby preventing the sealed bearing 20 from making abnormal noises and shaking during use due to the influence of muddy water or debris.

[0035] It should be noted that the water absorption component 40 and the connecting shaft 10 are in interference connection, and the sealing structure 30 and the water absorption component 40 and the sealing bearing 20 are all in interference connection.

[0036] In some embodiments, Figure 3 and Figure 4 As shown, the sealing structure 30 includes a first sealing cover 31 and a second sealing cover 32. The first sealing cover 31 is sleeved on the periphery of the water absorption component 40, and its opening is arranged toward the sealing bearing 20; the second sealing cover 32 is sleeved on the periphery of the sealing bearing 20, and a bending portion 321 is provided at one end thereof close to the first sealing cover 31. The bending portion 321 is located in the first sealing cover 31, and forms a C-shaped channel 33 with the first sealing cover 31 to prevent foreign matter from entering.

[0037] Specifically, the first sealing cover 31 and the second sealing cover 32 work together to seal the connection between the connecting shaft 10 and the sealing bearing 20, and the water absorption component 40 is sleeved on the periphery of the connecting shaft 10 and abuts against the sealing bearing 20, so that the water absorption component 40 and the sealing structure 30 work together to achieve sealing of the connection, so that external debris or muddy water can only enter the sealing bearing 20 through the C-shaped channel 33 formed by the first sealing cover 31 and the second sealing cover 32 and the water absorption component 40, and the muddy water will be absorbed by the water absorption component 40 when passing through the water absorption component 40, thereby further preventing the muddy water from contacting the sealing bearing 20.

[0038] The second sealing cover 32 is provided with a bending portion located inside the first sealing cover 31, so that the bending portion and the first sealing cover 31 form the C-shaped channel 33, which can filter external debris and prevent large external debris from contacting the sealed bearing 20, and can also buffer external debris or muddy water to prevent muddy water or debris from directly contacting the sealed bearing 20, which is beneficial to the protection of the sealed bearing 20 and further prevents the sealed bearing 20 from making abnormal noise or shaking during operation.

[0039] In some embodiments, Figure 4 As shown, the cross section of the inlet section 331 of the C-shaped channel is a bell-mouth, and its small-diameter end is arranged close to the sealing bearing 20 , and the outlet of the C-shaped channel 33 is arranged toward the water absorption component 40 .

[0040] Specifically, the bending portions 321 of the first sealing cover 31 and the second sealing cover 32 together constitute the C-shaped channel 33, and the bending portion 321 and the top of the first sealing cover 31 form an entrance section 331 of the C-shaped channel 33, and the bending portion 321 is inclined and bent toward the connecting shaft 10, and the top of the first sealing cover 31 is also inclined toward the connecting shaft 10, so that the cross-section of the entrance section 331 is a bell mouth, and the top end of the first sealing cover 31 corresponds to the small-diameter end of the bell mouth, and the end of the bending portion 321 of the second sealing cover 32 corresponds to the large-diameter end of the bell mouth. The outlet of the C-shaped channel 33 is composed of the bottom of the first sealing cover 31 and the bottom of the second sealing cover 32, and the outlet is arranged toward the water absorption component 40, so that the muddy water or debris entering through the C-shaped channel 33 flows toward the water absorption component 40, and the water absorption component 40 can absorb muddy water to prevent muddy water from flowing into the sealed bearing 20, which is beneficial to improving the sealing performance of the intermediate support structure 02.

[0041] It should be noted that the gap between the first sealing cover 31 and the second sealing cover 32 at the small-diameter end is 0.3-0.5 mm.

[0042] In some embodiments, Figure 4 As shown, the second sealing cover 32 has a concave structure 322 , which is connected to the bending portion 321 and is disposed close to the water absorbing assembly 40 .

[0043] Specifically, the concave structure 322 is provided on the second sealing cover 32, and the bottom of the concave structure 322 is arranged close to the water absorption component 40 so that there is a gap between the concave structure 322 and the water absorption component 40, and the gap is 0.3 to 0.5 mm. The gap can block some debris from contacting the sealing bearing 20, which is beneficial to the sealing performance of the intermediate support structure 02, and the top recess of the concave structure 322 can accommodate some debris, thereby preventing the debris from entering through the entrance section 331 of the C-shaped channel 33 and contacting the sealing bearing 20.

[0044] The top of the first sealing cover 31 is tilted toward the connecting shaft 10, so that foreign debris can enter the concave structure 322 under the tilting effect of the top of the first sealing cover 31. The concave structure 322 can store some debris, further preventing foreign debris from entering through the inlet section 331 and contacting the sealing bearing 20, which is beneficial to the sealing performance of the intermediate support structure 02.

[0045] In addition, the bending portion 321 of the second sealing cover 32 and the concave structure 322 together with the first sealing cover 31 form an ultimate labyrinth structure, which can effectively prevent external debris and muddy water from entering the C-shaped channel 33, greatly improving the sealing performance of the intermediate support structure 02.

[0046] In some embodiments, Figure 4 As shown, one side of the concave structure 322 close to the bending portion 321 is an inclined surface 3221 , and a water leakage hole is provided on the inclined surface 3221 .

[0047] Specifically, the water leakage hole is arranged on the inclined surface 3221 of the concave structure 322, and the moisture adsorbed by the water absorption component 40 can be thrown out with the high-speed rotation of the connecting shaft 10, and thrown to the outside through the water leakage hole, so that the adsorption capacity of the water absorption component 40 is maintained, which is beneficial for the water absorption component 40 to continue to play the adsorption role, prevent muddy water from entering the sealing bearing 20, and further ensure the sealing performance of the intermediate support structure 02.

[0048] In addition, the debris on the inclined surface 3221 will move to the bottom surface of the concave structure 322 under the action of the inclined surface and its own gravity, and will not enter the interior of the sealing structure 30 through the leakage hole, and will not affect the sealing performance of the intermediate support structure 02.

[0049] In some embodiments, Figure 3 As shown, the intermediate support structure 02 further includes a dust cover 50 , which is sleeved on the periphery of the connecting shaft 10 , with its opening disposed toward the first sealing cover 31 , and is located on the same side of the sealing bearing 20 as the first sealing cover 31 .

[0050] Specifically, the dust cover 50, the sealing structure 30, and the water absorption assembly 40 are located on the same side of the sealed bearing 20, and the opening of the dust cover 50 is set toward the sealed bearing 20, that is, the dust cover 50 is the first layer of protection structure to prevent external debris or muddy water from entering the sealed bearing 20.

[0051] The intermediate support structure 02 also includes a bracket 70 and a rubber sleeve 60. The rubber sleeve 60 is sleeved on the outer periphery of the second sealing cover 32. The bracket 70 is sleeved on the outer periphery of the rubber sleeve 60 and connected to the vehicle chassis, thereby driving the intermediate support structure 02 to be connected to the vehicle chassis.

[0052] The dust cover 50 is relatively large in size and can completely block hazards such as stone impacts and protect the sealed bearing 20. There is a gap between its end and the rubber sleeve 60. Debris or muddy water that the dust cover 50 fails to block enters between the dust cover 50 and the sealing structure 30 through the gap and contacts the connecting shaft 10. As the connecting shaft 10 rotates, it is thrown out through the gap, avoiding the accumulation of debris or muddy water, which is beneficial to prevent debris or muddy water from entering the sealed bearing 20, and further helps to extend the service life of the intermediate support structure 02.

[0053] Specifically, one end of the dust cover 50 away from the connecting shaft 10 is bent to form a bent end 51, and the bent end 51 is inclined. When foreign matter contacts the bent end 51, it can slide out toward the side away from the sealing bearing 20 due to the inclination of the bent end 51, avoiding entering the sealing structure 30, which is beneficial to the sealing performance of the intermediate support structure 02.

[0054] In this embodiment, the dust cover 50 is provided to realize the first layer of protection for the intermediate support structure 02, which can not only prevent most of the external debris or muddy water from contacting the sealed bearing 20, but also protect the sealing structure 30 and the water absorption component 40, so that they can better protect the sealed bearing 20, and work together to prevent the sealed bearing 20 from being affected by external debris or muddy water, thereby preventing the sealed bearing 20 from making abnormal noises and shaking during use due to the influence of muddy water or debris.

[0055] In some embodiments, Figure 3As shown, a protrusion 43 is provided at one end of the water absorbing component 40 away from the sealing bearing 20 , and the first sealing cover 31 abuts against the protrusion 43 .

[0056] Specifically, the first sealing cover 31 is sleeved on the periphery of the water absorption component 40, one end of the second sealing cover 32 is sleeved on the periphery of the sealing bearing 20, and the other end is located in the first sealing cover 31, and the protrusion 43 is provided at the end of the water absorption component 40 away from the sealing bearing 20, and the first sealing cover 31 is abutted against the protrusion 43, which can ensure the stability of the first sealing cover 31, that is, the protrusion 43 supports the first sealing cover 31, and prevents the first sealing cover 31 from turning away from the second sealing cover 32 under the action of external force, thereby destroying the interaction between the first sealing cover 31 and the second sealing cover 32, affecting the sealing performance of the sealing structure 30, and thus facilitating the stability of the sealing performance of the intermediate support structure 02.

[0057] In some embodiments, the water absorbing component 40 includes a connecting member 41 and a water absorbing member 42 . The connecting member 41 is sleeved on the periphery of the connecting shaft 10 , and the water absorbing member 42 is located on the outer surface of the connecting member 41 and is arranged close to the sealing bearing 20 .

[0058] Specifically, the connecting member 41 can be a steel pipe, and the water-absorbing member 42 is fixed on the outer surface of which. The water-absorbing member 42 can be felt, or it can be an item with adsorption capacity such as a sponge. Taking felt as an example, the felt and the steel pipe are combined to form the water-absorbing component 40. The steel pipe is sleeved on the outer periphery of the connecting shaft 10, and the corresponding felt is also located on the connecting shaft 10. The area covered by the felt on the outer surface of the steel pipe can be the same as the outer surface area of ​​the steel pipe, or it can be smaller than the outer surface area of ​​the steel pipe. When the area covered by the felt on the outer surface of the steel pipe is smaller than the outer surface area of ​​the steel pipe, the felt is arranged on the side of the steel pipe close to the sealed bearing 20, that is, the felt absorbs as much water as possible that is about to contact the sealed bearing 20 to avoid the sealed bearing 20 from contacting water, which is beneficial to improving the sealing performance of the intermediate support structure 02.

[0059] In addition, the protrusion 43 on the water absorption component 40 is integrally connected to the connecting piece 41, i.e., the steel pipe, which can ensure the stability of the protrusion 43, thereby facilitating the protrusion 43 to stably support the first sealing cover 31 and ensure the stability of the first sealing cover 31.

[0060] In some embodiments, the sealing structure 30 and the water absorbing assembly 40 are provided on both sides of the sealing bearing 20 , and the dimensions of the connection portions of the sealing structure 30 and the water absorbing assembly 40 and their corresponding connecting shafts 10 are adapted.

[0061] Specifically, the connecting shaft 10 is arranged through the sealing bearing 20, and the sealing structure 30 and the water absorption component 40 are arranged on the same side of the sealing bearing 20. The sealing structure 30 and the water absorption component 40 are arranged on both sides of the sealing bearing 20, which can further improve the sealing performance of the intermediate support structure 02, and more comprehensively avoid the intermediate support structure 02 from being caused by external debris or muddy water entering the sealing bearing 20, which is beneficial to extending the service life of the intermediate support structure 02.

[0062] It should be noted that the connecting shaft 10 can be a spline shaft, and the diameters of the spline shaft on both sides of the sealing bearing 20 are different. The sizes of the sealing structure 30 and the water absorption component 40 are adapted to the sizes of the shafts on which they are mounted, and the connection methods are all sleeve interference connections.

[0063] In some embodiments, the dust cover 50 is provided on both sides of the sealed bearing 20 , and the dust cover 50 cooperates with the sealing structure 30 and the water absorption component 40 to achieve the sealing effect of the intermediate support structure 02 .

[0064] Based on the same inventive concept, the present application also provides a vehicle, including an intermediate support structure of a transmission shaft provided by the present application, the beneficial effects of which are the same as those of the above-mentioned intermediate support structure of the transmission shaft, and will not be repeated here.

[0065] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0066] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An intermediate support structure of a transmission shaft, characterized in that: It includes a connecting shaft, a sealing bearing, a sealing structure and a water absorption component that are connected to each other; The connecting shaft passes through the sealing bearing, the water absorbing component is sleeved on the periphery of the connecting shaft and abuts against the sealing bearing, one end of the sealing structure is located on the periphery of the sealing bearing, and the other end is located on the periphery of the water absorbing component.

2. The intermediate support structure of the transmission shaft according to claim 1, characterized in that: The sealing structure includes a first sealing cover and a second sealing cover. The first sealing cover is sleeved on the periphery of the water absorption component, and its opening is arranged toward the sealing bearing; the second sealing cover is sleeved on the periphery of the sealing bearing, and a bending portion is provided at one end thereof close to the first sealing cover. The bending portion is located in the first sealing cover, and forms a C-shaped channel with the first sealing cover to prevent foreign matter from entering.

3. The intermediate support structure of the transmission shaft according to claim 2, characterized in that: The cross section of the inlet section of the C-shaped channel is a bell mouth, and the small-diameter end thereof is arranged close to the sealing bearing, and the outlet of the C-shaped channel is arranged toward the water absorption component.

4. The intermediate support structure of the transmission shaft according to claim 2, characterized in that: The second sealing cover has a concave structure, which is connected to the bent portion and is arranged close to the water absorbing component.

5. The intermediate support structure of the transmission shaft according to claim 4, characterized in that: The side of the concave structure close to the bending portion is an inclined surface, and a water leakage hole is arranged on the inclined surface.

6. The intermediate support structure of the transmission shaft according to claim 1, characterized in that: It also includes a dust cover, which is sleeved on the periphery of the connecting shaft, with an opening thereof disposed toward the sealing bearing, and is located on the same side of the sealing bearing as the sealing structure.

7. The intermediate support structure of the transmission shaft according to claim 2, characterized in that: A protrusion is provided at one end of the water absorbing component away from the sealing bearing, and the first sealing cover abuts against the protrusion.

8. The intermediate support structure of the transmission shaft according to claim 1, characterized in that: The water absorbing component comprises a connecting piece and a water absorbing piece. The connecting piece is sleeved on the periphery of the connecting shaft. The water absorbing piece is located on the outer surface of the connecting piece and is arranged close to the sealing bearing.

9. The intermediate support structure of the transmission shaft according to claim 1, characterized in that: The sealing structure and the water absorbing assembly are disposed on both sides of the sealing bearing, and the dimensions of the connection portions of the sealing structure and the water absorbing assembly and their corresponding connecting shafts are adapted.

10. A vehicle, characterized in that: An intermediate support structure for a transmission shaft comprising any one of claims 1 to 9.

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