Steering gear seal structure and vehicle

Abstract

The utility model provides a kind of steering gear sealing structure and vehicle, it is related to vehicle waterproof technical field.The steering gear sealing structure is used to set in the connecting place of steering gear columnar structure and car body front wall, part of the steering gear sealing structure is attached to the car body front wall, the steering gear sealing structure includes oil seal, and the oil seal cover is equipped in steering gear columnar structure and with the interference fit of steering gear columnar structure.The sealing between steering gear sealing structure and steering gear columnar structure is realized by oil seal, compared with traditional O-ring, the oil seal is like the oil seal in hydraulic system under high pressure environment, it can adapt to high pressure environment, that is, when the water pressure outside vehicle is larger, the sealing between the oil seal and steering gear columnar structure can still be better guaranteed;In other words, the sealing between steering gear sealing structure and steering gear columnar structure is realized by oil seal, and the sealing effect is better than traditional steering gear sealing structure.

Description

Technical Field

[0001] This utility model relates to the field of vehicle waterproofing technology, and more specifically, to a steering gear sealing structure and a vehicle. Background Technology

[0002] The automotive steering gear, also known as the steering unit or steering mechanism, is the most important component of the automotive steering system. Its function is to increase the force transmitted from the steering wheel to the steering transmission mechanism and change the direction of force transmission. Since the steering gear transmits the force from the steering wheel inside the driver's cabin to the wheels outside the cabin, it must include a columnar structure. This columnar structure extends from inside the driver's cabin through a hole in the front bulkhead. Because the steering gear columnar structure passes through the hole in the front bulkhead, a steering gear sealing structure is often required at the connection between the steering gear columnar structure and the hole in the front bulkhead to prevent water from outside the vehicle from seeping into the driver's cabin. However, in related technologies, the sealing effect of the steering gear sealing structure is generally poor, usually only suitable for situations with low external water pressure, and does not consider situations with high external water pressure. Utility Model Content

[0003] The present invention aims to improve the sealing effect at the connection between the steering column structure and the front bulkhead of the vehicle body.

[0004] To solve the above problems, this utility model provides a steering gear sealing structure for installation at the connection between the steering gear column structure and the front bulkhead of the vehicle body. Part of the steering gear sealing structure is tightly attached to the front bulkhead of the vehicle body. The steering gear sealing structure includes an oil seal, and the oil seal is sleeved on the steering gear column structure and has an interference fit with the steering gear column structure.

[0005] The steering gear sealing structure provided by this utility model is respectively attached to the front bulkhead of the vehicle body and the steering gear column structure to achieve a seal between the steering gear sealing structure and the front bulkhead, and simultaneously to achieve a seal between the steering gear sealing structure and the steering gear column structure, preventing water from the outside of the vehicle from leaking into the vehicle interior through the body through-holes in the front bulkhead (through which the steering gear column structure passes). The steering gear sealing structure includes an oil seal, which is fitted onto the steering gear column structure with an interference fit. In other words, the steering gear sealing structure achieves a tight seal with the steering gear column structure through the oil seal. Compared to traditional O-rings, this oil seal, like the oil seal in a hydraulic system under high pressure, can adapt to high-pressure environments. That is, when the external water pressure is high, the sealing performance between the oil seal and the steering gear column structure can still be well guaranteed. In other words, the steering gear sealing structure achieves a better seal with the steering gear column structure through the oil seal than traditional steering gear sealing structures.

[0006] Furthermore, the steering gear sealing structure also includes a sealing sleeve, which is fitted over the outside of the oil seal, and a sealing plate is provided at the first end of the sealing sleeve extending radially, the sealing plate being attached to and pressed against the front bulkhead of the vehicle body.

[0007] Furthermore, the steering gear sealing structure also includes a main frame, which is sleeved on the outside of the oil seal and the steering gear columnar structure. The oil seal is interference-fitted on the inside of the main frame, and the sealing sleeve is interference-fitted on the outside of the main frame.

[0008] Furthermore, the steering gear sealing structure also includes a sealing ring, and the inner sidewall of the main frame is provided with an annular groove. The sealing ring is embedded in the annular groove, and the sealing ring is interference-fitted with the steering gear columnar structure. The annular groove is located between the oil seal and the sealing plate.

[0009] Furthermore, the inner wall of the main frame includes a first large-diameter inner wall and a first small-diameter inner wall along its axial direction. The first small-diameter inner wall is located between the first large-diameter inner wall and the front bulkhead of the vehicle body. The annular groove is disposed at the first small-diameter inner wall, and the oil seal is interference-fitted at the first large-diameter inner wall.

[0010] Furthermore, the inner wall of the main frame includes a first large-diameter inner wall and a first small-diameter inner wall arranged sequentially along its axial direction, and a first inner step surface is formed between the first large-diameter inner wall and the first small-diameter inner wall. The two ends of the oil seal in the axial direction respectively abut against the first inner step surface and the first outer step surface of the steering column structure.

[0011] Furthermore, the inner wall of the sealing sleeve includes a second small-diameter inner wall and a second large-diameter inner wall that are sequentially away from the sealing plate along its axial direction. A second inner step surface is formed between the second large-diameter inner wall and the second small-diameter inner wall. A first support ring is provided at the end of the second large-diameter inner wall away from the second small-diameter inner wall in an inward radial direction. The end of the first support ring facing the second inner step surface and the second inner step surface respectively abut against the main frame.

[0012] Furthermore, the steering gear sealing structure also includes a pressure plate, a positioning rod, and a locking nut. The sealing plate and the pressure plate are located inside the front bulkhead of the vehicle body. The positioning rod is fixed to the front bulkhead of the vehicle body and is inserted into the sealing plate and the pressure plate in sequence. The locking nut is threaded to the positioning rod and locked to the pressure plate.

[0013] Furthermore, the pressure plate is provided with a first through hole, the sealing plate is made of rubber, and the sealing plate is provided with a positioning protrusion. The positioning protrusion extends through the first through hole to the side of the pressure plate away from the sealing plate, and the radial dimension of the portion of the positioning protrusion on the side of the pressure plate away from the sealing plate is greater than the diameter of the first through hole.

[0014] This utility model also provides a vehicle including the steering gear sealing structure as described above.

[0015] Since the technical improvements and effects of the vehicle are at least the same as those of the aforementioned steering gear sealing structure, the vehicle will not be described in detail again. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the steering gear sealing structure of this utility model after assembly, viewed from one perspective. Figure 2 This is a schematic diagram of the steering gear sealing structure of this utility model after assembly, viewed from another perspective. Figure 3 This is a cross-sectional view of the steering gear sealing structure after assembly according to an embodiment of the present utility model; Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0017] Explanation of reference numerals in the attached figures: 1. Steering gear column structure; 11. First outer step surface; 2. Front bulkhead panel; 21. Body through hole; 3. Steering gear sealing structure; 31. Oil seal; 311. Oil seal skeleton; 312. Oil seal body; 32. Main skeleton; 321. First large diameter inner wall; 322. First small diameter inner wall; 3221. Annular groove; 323. First inner step surface; 33. Sealing sleeve; 331. Second small diameter inner wall; 332. Second large diameter inner wall; 333. Second inner step surface; 334. First support ring; 34. Sealing plate; 341. Positioning protrusion; 35. Sealing ring; 36. Pressure plate; 37. Positioning rod; 38. Locking nut. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] In the description of this utility model, 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 utility model and simplifying the description, and do not indicate or imply that the device or element 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 utility model.

[0020] Furthermore, in the attached diagram, the Z-axis represents the vertical direction, that is, the up-down direction, with the positive direction of the Z-axis indicating up and the negative direction indicating down; the Y-axis represents the horizontal direction, that is, the left-right direction, with the positive direction of the Y-axis indicating left and the negative direction indicating right; the X-axis represents the vertical direction, that is, the front-back direction, with the positive direction of the X-axis indicating front and the negative direction indicating back. It should also be noted that the aforementioned representations of the Z, Y, and X axes are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] See Figure 1-4 A steering gear sealing structure 3 according to an embodiment of the present invention is used to be installed at the connection between the steering gear column structure 1 and the front bulkhead 2 of the vehicle body. Part of the steering gear sealing structure 3 is tightly attached to the front bulkhead 2 of the vehicle body. The steering gear sealing structure 3 includes an oil seal 31, and the oil seal 31 is sleeved on the steering gear column structure 1 and has an interference fit with the steering gear column structure 1.

[0022] The steering gear sealing structure 3 provided in this embodiment is respectively attached to the front bulkhead 2 of the vehicle body and the steering gear column structure 1 to achieve a seal between the steering gear sealing structure 3 and the front bulkhead 2 of the vehicle body, and at the same time, to achieve a seal between the steering gear sealing structure 3 and the steering gear column structure 1, so as to prevent water from the outside of the vehicle from leaking into the vehicle interior through the body through hole 21 (through which the steering gear column structure 1 passes) of the front bulkhead 2 of the vehicle body.

[0023] The steering gear sealing structure 3 includes an oil seal 31, which is fitted onto the steering gear column structure 1 and has an interference fit with it. In other words, the steering gear sealing structure 3 achieves a tight seal with the steering gear column structure 1 through the oil seal 31. Compared to traditional O-rings, the oil seal 31 is like the oil seal 31 in a hydraulic system under high pressure. It can adapt to high pressure environments. That is, when the external water pressure of the vehicle is high, the sealing performance between the oil seal 31 and the steering gear column structure 1 can still be well guaranteed. In other words, the steering gear sealing structure 3 achieves a better sealing effect with the steering gear column structure 1 through the oil seal 31 than traditional steering gear sealing structures.

[0024] It should be noted that in hydraulic systems, the pressure of the hydraulic oil during system operation is relatively high. To prevent hydraulic oil leakage, oil seals 31 are commonly used as sealing components in hydraulic systems, demonstrating that oil seals 31 can withstand high-pressure environments. However, in the field of vehicle waterproofing, the external water pressure of vehicles is generally low. For example, when a vehicle is driving on a road with puddles or standing water, even if the water level reaches the body through-hole 21 in the front bulkhead 2, the water pressure on the traditional steering gear sealing structure is not high. Therefore, the sealing performance of the traditional steering gear sealing structure is sufficient to prevent water from seeping into the vehicle interior.

[0025] However, for some special scenarios or special vehicles, such as when the vehicle is being operated in water or accidentally falls into a deep environment such as a river, pond, or lake, the water pressure outside the vehicle is relatively high. In this case, the traditional steering gear sealing structure is difficult to withstand the high external water pressure, and the high-pressure water may seep into the vehicle from between the steering gear sealing structure 3 and the steering gear column structure 1.

[0026] In this embodiment, to improve the sealing performance of the steering gear sealing structure 3, an oil seal 31 is specifically used to achieve a seal between the oil seal 31 and the steering gear column structure 1. Since the oil seal 31 can adapt to a high-pressure environment, it can effectively resist the penetration of water from the external high pressure between the oil seal 31 and the steering gear column structure 1 into the vehicle interior, thereby improving the sealing performance of the steering gear sealing structure 3 in this embodiment.

[0027] Specifically, see Figure 4 The oil seal 31 includes a steel oil seal skeleton 311 and a rubber oil seal body 312. Both the oil seal body 312 and the oil seal skeleton 311 are annular, with the oil seal skeleton 311 embedded within the oil seal body 312. After the oil seal 31 is interference-fitted with the steering gear column structure 1, not only is the rubber oil seal body 312 deformed outward, but the steel oil seal skeleton 311 also deforms outward. Because the oil seal skeleton 311 is made of steel, compared to rubber, the inward elastic force after deformation is much greater. Consequently, under the inward elastic force of the oil seal skeleton 311, the static friction between the inner wall of the oil seal body 312 and the steering gear column structure 1 is very high, resulting in high fitting precision and stronger sealing performance.

[0028] See Figure 2-4 Optionally, the steering gear sealing structure 3 further includes a sealing sleeve 33, which is sleeved on the outside of the oil seal 31, and a sealing plate 34 is provided at the first end of the sealing sleeve 33 extending radially, the sealing plate 34 being attached to and pressed against the front bulkhead 2 of the vehicle body.

[0029] In this embodiment, the steering gear sealing structure 3, in addition to the sealing between the steering gear column structure 1 and the oil seal 31, also achieves a seal between the steering gear sealing structure 3 and the front body panel 2 by having a sealing plate 34 at one end of the sealing sleeve 33 adhere to and press against the front body panel 2. The sealing sleeve 33 is, for example, made of rubber, which has a certain deformation capacity. Since the sealing plate 34 is integrally formed with the sealing sleeve 33, meaning the sealing plate 34 is also made of rubber, the rubber sealing plate 34 presses against the front body panel 2 to achieve a seal. Furthermore, the sealing plate 34 has an annular structure surrounding the body through-hole 21 to seal the body through-hole 21 of the front body panel 2. The aforementioned oil seal 31 is located inside the sealing sleeve 33, and the oil seal 31 can achieve an interference fit with the sealing sleeve 33 through direct contact to achieve a seal between the oil seal 31 and the sealing sleeve 33.

[0030] See Figure 4 Optionally, the steering gear sealing structure 3 further includes a main frame 32, which is sleeved on the outside of the oil seal 31 and the steering gear column structure 1. The oil seal 31 is interference-fitted on the inside of the main frame 32, and the sealing sleeve 33 is interference-fitted on the outside of the main frame 32.

[0031] In this embodiment, the main frame 32 has a ring-shaped structure, with at least a portion of the main frame 32 located between the sealing sleeve 33 and the oil seal 31. The main frame 32 is made of rigid plastic or steel, providing a carrier for the inner oil seal 31 and the outer sealing sleeve 33 to fit together. Specifically, when the main frame 32 and the oil seal 31 are assembled together, since the main frame 32 is harder than the oil seal body 312 of the oil seal 31, the main frame 32 will not deform after the oil seal 31 is fitted into the inner wall of the main frame 32, but the oil seal 31 will deform. This results in a more ideal interference fit between the main frame 32 and the oil seal 31, and consequently, a more ideal seal. Similarly, since the main frame 32 is harder than the sealing sleeve 33, the main frame 32 will not deform after being fitted into the sealing sleeve 33, but the sealing sleeve 33 will expand and deform outward. This also results in a more ideal interference fit between the main frame 32 and the sealing sleeve 33, and consequently, a more ideal seal.

[0032] It is evident that, compared to the method of achieving an interference fit by direct contact between the oil seal 31 and the sealing sleeve 33, this embodiment achieves a better sealing effect by setting a main skeleton 32 between the sealing sleeve 33 and the oil seal 31 to achieve an interference fit.

[0033] See Figure 4Optionally, the steering gear sealing structure 3 further includes a sealing ring 35. The inner sidewall of the main frame 32 is provided with an annular groove 3221. The sealing ring 35 is embedded in the annular groove 3221, and the sealing ring 35 is interference-fitted with the steering gear columnar structure 1. The annular groove 3221 is located between the oil seal 31 and the sealing plate 34.

[0034] In this embodiment, the axial dimensions of both the sealing sleeve 33 and the main frame 32 are larger than those of the oil seal 31. A portion of the main frame 32 is located between the sealing sleeve 33 and the oil seal 31, while another portion is located between the sealing sleeve 33 and the steering gear column structure 1. This other portion is press-fitted with the steering gear column structure 1 via a sealing ring 35. The sealing ring 35 is, for example, a conventional O-ring, which is low-cost. After the O-ring is embedded in the annular groove 3221 on the inner wall of the main frame 32, it will not move axially. After the steering gear column structure 1 is inserted into the steering gear sealing structure 3, the steering gear column structure 1 achieves a press-fit not only with the oil seal 31 but also with the O-ring.

[0035] By simultaneously using oil seal 31 and sealing ring 35, multiple seals can be achieved between the steering gear sealing structure 3 and the steering gear column structure 1. The annular groove 3221 is located between oil seal 31 and the front body panel 2, meaning that the sealing ring 35 is located between oil seal 31 and the front body panel 2. In other words, the portion of the main frame 32 that is press-fitted with the steering gear column structure 1 via sealing ring 35 is closer to the front body panel 2 than the portion of the main frame 32 that is press-fitted with oil seal 31. Thus, oil seal 31, with its stronger sealing ability and resistance to external water pressure, serves as the first sealing structure, while the O-ring, with its weaker resistance to external water pressure, serves as the subsequent sealing structure, further improving the sealing performance.

[0036] like Figure 4 As described above, for example, two annular grooves 3221 are sequentially arranged along the axial direction of the main frame 32, and sealing rings 35 are arranged in both annular grooves 3221. In this way, a three-layer seal can be achieved between the steering gear structure and the steering gear column structure 1. The oil seal 31 is the first sealing structure, and the two sealing rings 35 are the second and third sealing structures, respectively. Through this arrangement of multiple sealing structures, the sealing capacity of the steering gear sealing structure 3 can be further improved. Even if external high-pressure water "struggles" to pass through the first sealing structure, the pressure of the water after passing through the first sealing structure is greatly consumed. At this time, the sealing rings 35, which have a weaker resistance to water pressure, can still prevent water from seeping into the vehicle.

[0037] See Figure 4Optionally, the inner sidewall of the main frame 32 includes a first large-diameter inner wall 321 and a first small-diameter inner wall 322 along its axial direction. The first small-diameter inner wall 322 is located between the first large-diameter inner wall 321 and the front bulkhead 2 of the vehicle body. The annular groove 3221 is provided at the first small-diameter inner wall 322, and the oil seal 31 is interference-fitted at the first large-diameter inner wall 321.

[0038] In this embodiment, since the oil seal 31 includes an oil seal body 312 and an oil seal skeleton 311 embedded in the oil seal body 312, the distance from the inner wall to the outer wall of the oil seal 31 is greater than the corresponding distance of the sealing ring 35. In order to ensure that both the oil seal 31 and the sealing ring 35 can be interference-fitted between the main skeleton 32 and the steering column structure 1, the inner wall of the main skeleton 32 is designed with unequal diameters. That is, the diameter of the first large diameter inner wall 321 of the main skeleton 32 is greater than the diameter of the first small diameter inner wall 322. In this way, the oil seal 31 can be fitted at the first large diameter inner wall 321, while the sealing ring 35 can be fitted in the annular groove 3221 at the first small diameter inner wall 322.

[0039] See Figure 4 Optionally, the inner wall of the main frame 32 includes a first large-diameter inner wall 321 and a first small-diameter inner wall 322 arranged sequentially along its axial direction. A first inner step surface 323 is formed between the first large-diameter inner wall 321 and the first small-diameter inner wall 322. The two ends of the oil seal 31 abut against the first inner step surface 323 and the first outer step surface 11 of the steering column structure 1, respectively.

[0040] In this embodiment, since the diameter of the first large-diameter inner wall 321 is larger than the diameter of the first small-diameter inner wall 322, there must be a transition region between the first large-diameter inner wall 321 and the first small-diameter inner wall 322. This transition region can be the first inner step surface 323, and the surface of the first inner step surface 323 is perpendicular to the axial direction of the main frame 32. That is, the first inner step surface 323 is perpendicular to the first large-diameter inner wall 321. Thus, after the oil seal 31 is interference-fitted at the first large-diameter inner wall 321, one end of it can abut against the first inner step surface 323, and the other end can abut against the first outer step surface 11 of the steering column structure 1 (i.e., the step surface formed on the outer wall of the steering column structure 1). The first inner step surface 323 and the first outer step surface 11 jointly fix the oil seal 31 axially. In addition, the presence of the first inner step surface 323 can also increase the complexity of the intrusion path of water vapor along the main frame 32 and the oil seal 31, thereby further improving the sealing effect.

[0041] It is understandable that since the oil seal 31 is interference-fitted at the first large-diameter inner wall 321, the oil seal 31 has been axially fixed by the static friction between the two. However, in order to further fix the oil seal 31 axially and ensure its service life, the first inner step surface 323 and the first outer step surface 11 are used to further fix the oil seal 31 axially.

[0042] It is understandable that the steering gear sealing structure 3 is already an assembled whole before it is installed at the connection between the steering gear column structure 1 and the front of the vehicle body. When assembling the steering gear column structure 1 itself, the following assembly sequence can be used, for example: first, the oil seal 31 is interference-fitted onto the first large-diameter inner wall 321 of the main frame 32, and one end of the oil seal 31 abuts against the first inner step surface 323; then, the sealing ring 35 is installed into the annular groove 3221 of the first small-diameter inner wall 322 of the main frame 32; then, the sealing sleeve 33 is interference-fitted onto the outside of the main frame 32.

[0043] See Figure 4 Optionally, the inner wall of the sealing sleeve 33 includes a second small-diameter inner wall 331 and a second large-diameter inner wall 332 that are sequentially away from the sealing plate 34 along its axial direction. A second inner step surface 333 is formed between the second large-diameter inner wall 332 and the second small-diameter inner wall 331. A first support ring 334 is provided at the end of the second large-diameter inner wall 332 away from the second small-diameter inner wall 331 in an inward radial direction. The end of the first support ring 334 facing the second inner step surface 333 and the second inner step surface 333 respectively abut against the main frame 32.

[0044] In this embodiment, the inner wall of the sealing sleeve 33 is not designed with a uniform diameter. Specifically, the diameter of its second largest diameter inner wall 332 is larger than that of its second smallest diameter inner wall, and the second largest diameter inner wall 332 is located on the side of the second smallest diameter inner wall 331 away from the front bulkhead 2 of the vehicle body. Thus, the first support ring 334 is located at the end of the sealing sleeve 33 away from the front bulkhead 2 of the vehicle body, that is... Figure 4 The lower end, as shown, allows the main frame 32 to be fitted into the sealing sleeve 33 along its lower end, and the first support ring 334 and the upper second inner step surface 333 abut against the main frame 32, thereby achieving axial fixation of the main frame 32. Specifically, the main frame 32 can form an outer step surface at a position corresponding to the first inner step surface 323, through which the main frame 32 abuts against the second inner step surface 333 of the sealing sleeve 33. In addition, the presence of the second inner step surface 333 increases the complexity of the intrusion path of water vapor along the sealing sleeve 33 and the main frame 32, thereby further improving the sealing effect.

[0045] It is understandable that since the main frame 32 is interference-fitted into the sealing sleeve 33, the oil seal 31 has been axially fixed by the static friction between the two. However, in order to further fix the main frame 32 axially, the second inner step surface 333 and the first support ring 334 are used together to further fix the main frame 32 axially.

[0046] See Figure 2 and Figure 4 Optionally, the steering gear sealing structure 3 further includes a pressure plate 36, a positioning rod 37, and a locking nut 38. The sealing plate 34 and the pressure plate 36 are located inside the front bulkhead 2 of the vehicle body. The positioning rod 37 is fixed to the front bulkhead 2 of the vehicle body and is inserted into the sealing plate 34 and the pressure plate 36 in sequence. The locking nut 38 is threaded to the positioning rod 37 and locked onto the pressure plate 36.

[0047] In this embodiment, both the sealing plate 34 and the pressure plate 36 are located inside the front bulkhead 2 of the vehicle body to reduce corrosion caused by direct exposure of the sealing plate 34 and the pressure plate 36. During installation, the holes in the sealing plate 34 and the pressure plate 36 are sequentially inserted into the positioning rod 37 inside the front bulkhead 2 until the sealing plate 34 is flush with the inner side of the front bulkhead 2 and the pressure plate 36 is flush with the inner side of the sealing plate 34. Then, the locking nut 38 is threaded onto the positioning rod 37. As the locking nut 38 is tightened, the pressure plate 36 tightly presses the rubber sealing plate 34 against the front bulkhead 2, achieving a seal between them. The two ends of the positioning rod 37 can be located on the inner and outer sides of the front bulkhead 2 of the vehicle body, respectively. That is, the positioning rod 37 passes through the front bulkhead 2 of the vehicle body. The positioning rod 37 can be a bolt. Its head can be fixed to the front bulkhead 2 of the vehicle body by welding on the outer side of the front bulkhead 2 of the vehicle body, and the weld seam can achieve the seal between the bolt and the front bulkhead 2 of the vehicle body.

[0048] See Figure 2 and Figure 4 Optionally, the pressure plate 36 is provided with a first through hole, the sealing plate 34 is made of rubber, and the sealing plate 34 is provided with a positioning protrusion 341. The positioning protrusion 341 extends through the first through hole to the side of the pressure plate 36 away from the sealing plate 34, and the radial dimension of the portion of the positioning protrusion 341 located on the side of the pressure plate 36 away from the sealing plate 34 is greater than the diameter of the first through hole.

[0049] In this embodiment, as described above, the steering gear sealing structure 3 is already an assembled whole before being installed at the connection between the steering gear column structure 1 and the front bulkhead of the vehicle body. The positioning protrusion 341 engages with the first through hole of the pressure plate 36 to achieve relative fixation between the pressure plate 36 and the sealing plate 34. It is understood that both the sealing plate 34 and the positioning protrusion 341 are made of rubber and are mushroom-shaped. The positioning protrusion 341 passes through the first through hole of the pressure plate 36 by deformation. The radial dimension of the portion of the positioning protrusion 341 passing through the pressure plate 36 is larger than the diameter of the first through hole, thereby limiting the pressure plate 36 to the surface of the sealing plate 34, ensuring that the pressure plate 36 and the sealing plate 34 do not separate during transport and transportation of the steering gear sealing structure 3.

[0050] Another embodiment of the present invention provides a vehicle including the steering gear sealing structure as described above.

[0051] Since the technical improvements and effects of the vehicle are at least the same as those of the aforementioned steering gear sealing structure, the vehicle will not be described in detail again.

[0052] Since the technical improvements and effects of the vehicle are at least the same as those of the aforementioned waterproof cover, the vehicle will not be described in detail again.

[0053] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" and "second" may explicitly or implicitly include at least one of that feature. Unless otherwise specified, the term "multiple" means at least two.

[0054] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A steering gear sealing structure, used at the connection between the steering gear column structure (1) and the front bulkhead (2) of the vehicle body, characterized in that, The steering gear sealing structure (3) is partially attached to the front bulkhead (2) of the vehicle body. The steering gear sealing structure (3) includes an oil seal (31), and the oil seal (31) is sleeved on the steering gear column structure (1) and is interference-fitted with the steering gear column structure (1).

2. The steering gear sealing structure according to claim 1, characterized in that, It also includes a sealing sleeve (33), which is fitted on the outside of the oil seal (31), and a sealing plate (34) is provided at the first end of the sealing sleeve (33) extending radially, and the sealing plate (34) is attached to and pressed against the front bulkhead (2) of the vehicle body.

3. The steering gear sealing structure according to claim 2, characterized in that, It also includes a main frame (32), which is sleeved on the outside of the oil seal (31) and the steering column structure (1). The oil seal (31) is interference-fitted on the inside of the main frame (32), and the sealing sleeve (33) is interference-fitted on the outside of the main frame (32).

4. The steering gear sealing structure according to claim 3, characterized in that, It also includes a sealing ring (35), and the inner sidewall of the main frame (32) is provided with an annular groove (3221). The sealing ring (35) is embedded in the annular groove (3221), and the sealing ring (35) is interference-fitted with the steering column structure (1). The annular groove (3221) is located between the oil seal (31) and the sealing plate (34).

5. A steering gear sealing structure according to claim 4, characterized in that, The inner wall of the main frame (32) includes a first large-diameter inner wall (321) and a first small-diameter inner wall (322) along its axial direction. The first small-diameter inner wall (322) is located between the first large-diameter inner wall (321) and the front bulkhead (2) of the vehicle body. The annular groove (3221) is provided at the first small-diameter inner wall (322), and the oil seal (31) is interference-fitted at the first large-diameter inner wall (321).

6. A steering gear sealing structure according to claim 3, characterized in that, The inner wall of the main frame (32) includes a first large-diameter inner wall (321) and a first small-diameter inner wall (322) arranged sequentially along its axial direction. A first inner step surface (323) is formed between the first large-diameter inner wall (321) and the first small-diameter inner wall (322). The two ends of the oil seal (31) in the axial direction respectively abut against the first inner step surface (323) and the first outer step surface (11) of the steering column structure (1).

7. A steering gear sealing structure according to claim 3, characterized in that, The inner wall of the sealing sleeve (33) includes a second small-diameter inner wall (331) and a second large-diameter inner wall (332) that are sequentially away from the sealing plate (34) along its axial direction. A second inner step surface (333) is formed between the second large-diameter inner wall (332) and the second small-diameter inner wall (331). A first support ring (334) is provided at the end of the second large-diameter inner wall (332) away from the second small-diameter inner wall (331) in an inward radial direction. The end of the first support ring (334) facing the second inner step surface (333) and the second inner step surface (333) respectively abut against the main frame (32).

8. A steering gear sealing structure according to claim 2, characterized in that, It also includes a pressure plate (36), a positioning rod (37), and a locking nut (38). The sealing plate (34) and the pressure plate (36) are located inside the front bulkhead (2) of the vehicle body. The positioning rod (37) is fixed to the front bulkhead (2) of the vehicle body and is inserted into the sealing plate (34) and the pressure plate (36) in sequence. The locking nut (38) is threaded to the positioning rod (37) and locked onto the pressure plate (36).

9. A steering gear sealing structure according to claim 8, characterized in that, The pressure plate (36) is provided with a first through hole, the sealing plate (34) is made of rubber, and the sealing plate (34) is provided with a positioning protrusion (341). The positioning protrusion (341) extends through the first through hole to the side of the pressure plate (36) away from the sealing plate (34), and the radial dimension of the portion of the positioning protrusion (341) on the side of the pressure plate (36) away from the sealing plate (34) is greater than the diameter of the first through hole.

10. A vehicle, characterized in that, Includes the steering gear sealing structure (3) as described in any one of claims 1-9.

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