Automotive steering column sealing device

Abstract

The utility model discloses a vehicle steering column sealing device which is characterized in that a steering column is arranged in an avoiding hole in a vehicle floor in a penetrating mode and connected with a steering wheel and a steering engine, the vehicle steering column sealing device comprises an elastic sound insulation sleeve, and the elastic sound insulation sleeve is installed on the floor and covers the avoiding hole; the elastic sound insulation sleeve is provided with a through hole allowing the steering column to penetrate through, and the elastic sound insulation sleeve is connected with the steering column in the circumferential direction of the steering column. Noise below the floor can be in contact with the elastic sound insulation sleeve after penetrating through the receding hole, and is blocked by the elastic sound insulation sleeve so as to be greatly weakened to be transmitted into a cab. The elastic sound insulation sleeve is connected with the steering pipe column in the circumferential direction of the steering pipe column, so that the elastic sound insulation sleeve covers the propagation path of noise between the avoiding hole and the cab in an all-around mode, and the noise transmitted from the lower portion of the avoiding hole can move into the cab only after being subjected to noise reduction and reduction of the elastic sound insulation sleeve. And the silencing effect on the cab is greatly improved.

Description

Technical Field

[0001] The present application belongs to the technical field of vehicle accessories, and specifically relates to a vehicle steering column sealing device. Background Art

[0002] A car's steering system is a series of devices used to change or maintain the car's direction of travel. The steering column, a crucial component of the system, primarily connects the steering wheel and steering gear. When the driver turns the steering wheel, the steering wheel rotates the steering column and transmits torque to the steering gear, thereby achieving steering. During car design, the steering wheel is located above the floor of the cab, while the steering gear is located below. A clearance hole is provided in the floor for the steering column to pass through, thereby connecting the steering column to the steering wheel and steering gear. Vehicle components beneath the floor generate considerable noise during operation, which is transmitted into the cab through the clearance hole, impacting the cabin's sealing and soundproofing. Therefore, soundproofing components are required in the clearance hole.

[0003] In the prior art, the Figure 1 The technical solution shown in the figure installs a dust shield above the avoidance hole to shield the steering column and prevent dust. A sound insulation member is also installed on top of the dust shield to reduce the transmission of noise from under the floor into the cab through the avoidance hole. However, due to the poor sound insulation performance of the dust shield itself, most of the noise from under the floor will enter the cab through the dust shield after passing through the avoidance hole. The sound insulation member has a poor sound insulation effect and cannot effectively reduce the noise level in the cab, thus affecting the vehicle's NVH level. Utility Model Content

[0004] The present application provides a vehicle steering column sealing device to solve the technical problem of poor sound insulation at the junction of the steering column and the floor in traditional vehicles.

[0005] The technical solutions adopted in this application are:

[0006] A vehicle steering column sealing device, wherein the steering column passes through an avoidance hole on the vehicle floor and is respectively connected to the steering wheel and the steering gear, and includes an elastic sound insulation sleeve, which is installed on the floor and covers the avoidance hole. The elastic sound insulation sleeve is provided with a through hole for the steering column to pass through, and the elastic sound insulation sleeve is connected to the steering column along the circumference of the steering column.

[0007] The vehicle steering column sealing device described in this application also includes the following additional technical features:

[0008] The elastic sound insulation sleeve includes a first sleeve body located above the floor, and the first sleeve body is bent to form a plurality of sound-absorbing recesses that are recessed toward the steering column.

[0009] The elastic sound insulation sleeve also includes a second sleeve body located above the avoidance hole, one end of the second sleeve body is connected to the first sleeve body, and the other end extends horizontally toward the direction close to the steering column and abuts against the steering column.

[0010] The elastic sound insulation sleeve includes a sleeve body and a first connecting member arranged at the through hole, the first connecting member connects the sleeve body to the steering column, a plurality of mounting grooves are provided on the first connecting member, and the sleeve body is provided with mounting protrusions at the through hole that are equal to and adapted to the mounting grooves, and the mounting protrusions are interference fit with the mounting grooves.

[0011] The first connecting member is annular, and the steering column is provided with a limiting groove adapted to the first connecting member along the circumferential direction, and the first connecting member is partially located in the limiting groove.

[0012] The first connecting member has a first portion located outside the limiting groove and a second portion located inside the limiting groove. The mounting groove is opened in the first portion. An oil filling port is opened on the first portion. An oil outlet is opened on the second portion. The oil filling port and the oil outlet are connected through an oil filling pipeline.

[0013] It also includes a second connecting piece connecting the elastic sound insulation sleeve to the floor, the floor is provided with a first connecting hole, and the second connecting piece is provided with a second connecting hole aligned with the first connecting hole, and the connection between the second connecting piece and the floor is achieved by sequentially passing a connecting rod through the first connecting hole and the second connecting hole.

[0014] The second connecting member is annular and is arranged along the outer circumference of the avoidance hole. There are multiple second connecting holes and they are arranged at intervals.

[0015] The elastic sound insulation sleeve is bonded to the second connecting member.

[0016] It also includes a dust cover arranged on the top of the elastic sound insulation sleeve, and the dust cover covers the steering column along the circumference of the steering column.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0018] 1. The vehicle steering column sealing device of the present application includes an elastic sound insulation sleeve, which covers the avoidance hole. In this way, when the noise under the floor passes through the avoidance hole, it will contact the elastic sound insulation sleeve and be blocked by the elastic sound insulation sleeve, thereby greatly weakening the transmission into the cab; and a through hole is opened on the elastic sound insulation sleeve, and the steering column passes through the through hole. The elastic sound insulation sleeve is connected to the steering column along the circumference of the steering column. In this way, the elastic sound insulation sleeve achieves all-round coverage of the noise propagation path between the avoidance hole and the cab. The noise transmitted from the bottom of the avoidance hole must be reduced by the elastic sound insulation sleeve before it can move into the cab, thereby greatly improving the noise reduction effect of the cab.

[0019] 2. As a preferred embodiment of the present application, the elastic sound insulation sleeve is configured to include a first sleeve, and the first sleeve is bent. On the one hand, the sound-absorbing recess formed by the bending of the first sleeve can increase the external surface area of the first sleeve toward the avoidance hole, thereby enhancing the noise absorption effect; on the other hand, the bending design of the first sleeve provides more margin for the connection position between the elastic sound insulation sleeve and the steering column. The elastic sound insulation sleeve has better adaptability for steering columns of different heights and different connection positions; for example, when the connection point between the steering column and the elastic sound insulation sleeve is higher, the first sleeve can be lengthened so that it can be connected to the steering column.

[0020] 3. As a preferred embodiment of the present application, on the basis of the first set, the elastic sound insulation sleeve also includes a second set arranged above the avoidance hole. In this way, when the noise below the floor is transmitted upward through the avoidance hole, it will first be weakened by the first set, and then be weakened for the second time by the second set before entering the cab. The decibel value of the noise after the secondary attenuation is greatly reduced and is almost imperceptible to the human ear, thereby achieving efficient silencing of the cab and greatly improving the sealing of the cab. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 It is a schematic diagram of the structure of the steering column, dust cover and sound insulation in the prior art;

[0023] Figure 2 This is a schematic diagram of the structure of a steering column sealing device for a vehicle according to an embodiment of the present application. Figure 1 ;

[0024] Figure 3 This is a cross-sectional view of a steering column sealing device for a vehicle according to an embodiment of the present application. Figure 1 ;

[0025] Figure 4 This is a cross-sectional view of a steering column sealing device for a vehicle according to an embodiment of the present application. Figure 2 ;

[0026] Figure 5 This is a schematic structural diagram of the elastic sealing sleeve and the second connecting member in one embodiment of the present application;

[0027] Figure 6 This is a schematic structural diagram of the lower floor in one embodiment of the present application;

[0028] Figure 7 This is a front view of a steering column according to an embodiment of the present application;

[0029] Figure 8 This is a schematic diagram of the structure of a steering column sealing device for a vehicle according to an embodiment of the present application. Figure 2 .

[0030] in:

[0031] 1 steering column, 11 limiting grooves;

[0032] 2 floor, 21 first connection hole;

[0033] 3 avoidance holes;

[0034] 4 elastic sound insulation sleeve, 41 sleeve body, 411 first sleeve body, 412 second sleeve body, 42 first connecting member, 421 mounting groove, 43 sound absorbing recess, 44 through hole;

[0035] 5 second connecting member, 51 second connecting hole;

[0036] 6. Dust cover;

[0037] 7. Sound insulation;

[0038] 8. Dust cover. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0040] The following description sets forth many specific details to facilitate a thorough understanding of the present application. However, the present application may also be implemented in other ways than those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features of each embodiment may be combined with each other unless there is a conflict.

[0041] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application.

[0042] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0044] like Figures 2 to 7 As shown, a sealing device for a vehicle steering column 1, the steering column 1 passes through an avoidance hole 3 on the vehicle floor 2 and is respectively connected to the steering wheel and the steering gear, including an elastic sound insulation sleeve 4, which is installed on the floor 2 and covers the avoidance hole 3. The elastic sound insulation sleeve 4 is provided with a through hole 44 for the steering column 1 to pass through, and the elastic sound insulation sleeve 4 is connected to the steering column 1 along the circumference of the steering column 1.

[0045] The sealing device of the vehicle steering column 1 of the present application includes an elastic sound insulation sleeve 4, which covers the avoidance hole 3. In this way, when the noise under the floor 2 passes through the avoidance hole 3, it will contact the elastic sound insulation sleeve 4 and be blocked by the elastic sound insulation sleeve 4, thereby greatly weakening the transmission into the cab; and a through hole 44 is opened on the elastic sound insulation sleeve 4, and the steering column 1 passes through the through hole 44. The elastic sound insulation sleeve 4 is connected to the steering column 1 along the circumference of the steering column 1. In this way, the elastic sound insulation sleeve 4 achieves all-round coverage of the noise propagation path between the avoidance hole 3 and the cab. The noise transmitted from the bottom of the avoidance hole 3 must be reduced by the elastic sound insulation sleeve 4 before it can move into the cab, which greatly improves the sound reduction effect of the cab.

[0046] Preferably, the elastic sound insulation sleeve 4 is an elastic structure made of rubber.

[0047] As a preferred embodiment of the present application, Figure 2 、 Figure 3 As shown, the elastic sound insulation sleeve 4 includes a first sleeve body 411 located above the floor 2 . The first sleeve body 411 is bent to form a plurality of sound-absorbing recesses 43 that are recessed toward the steering column 1 .

[0048] The elastic sound insulation sleeve 4 is configured to include a first sleeve 411, and the first sleeve 411 is bent. On the one hand, the sound-absorbing recess 43 formed by the bending of the first sleeve 411 can increase the external surface area of the first sleeve 411 toward the avoidance hole 3, thereby enhancing the noise absorption effect; on the other hand, the bending design of the first sleeve 411 provides more margin for the connection position between the elastic sound insulation sleeve 4 and the steering column 1. The elastic sound insulation sleeve 4 has better adaptability for steering columns 1 with different heights and different connection positions; for example, when the connection point between the steering column 1 and the elastic sound insulation sleeve 4 is higher, the first sleeve 411 can be lengthened so that it can be connected to the steering column 1.

[0049] As a preferred embodiment of this embodiment, Figure 4 As shown, the elastic sound insulation sleeve 4 also includes a second sleeve 412 located above the avoidance hole 3. One end of the second sleeve 412 is connected to the first sleeve 411, and the other end extends horizontally toward the steering column 1 and abuts the steering column 1. In addition to the first sleeve 411, the elastic sound insulation sleeve 4 also includes a second sleeve 412 located above the avoidance hole 3. As a result, when noise from below the floor 2 is transmitted upward through the avoidance hole 3, it is first attenuated by the first sleeve 411 and then further attenuated by the second sleeve 412 before entering the cab. This secondary attenuation significantly reduces the decibel level of the noise, making it virtually imperceptible to the human ear. This achieves highly efficient noise reduction in the cab and significantly improves its sealing performance.

[0050] In this embodiment, the second sleeve 412 is constructed as a rubber sound insulation board extending in the horizontal direction, with a hole provided in the middle corresponding to the steering column 1. The steering column 1 passes through the hole and extends downward. When the steering column 1 is working, it will rotate around its own axis and will not shift in the horizontal direction. Therefore, when the steering column 1 is working, it will only produce relative friction with the second sleeve 412 and will not produce relative movement in the horizontal direction with the second sleeve 412.

[0051] As a preferred embodiment of the present application, Figures 3 to 5 As shown, the elastic sound insulation sleeve 4 includes a sleeve body 41 and a first connecting member 42 provided at the through hole. The first connecting member 42 connects the sleeve body 41 to the steering column 1. A plurality of mounting grooves 421 are provided on the first connecting member 42. The sleeve body 41 is provided with mounting protrusions (not shown in the figure) at the through hole that are equal in number to and adapted to the mounting grooves 421. The mounting protrusions are interference fit with the mounting grooves 421.

[0052] By setting the first connecting member 42, a connecting component is provided for the connection between the sleeve body 41 of the elastic sound insulation sleeve 4 and the steering column 1. The interference fit between the mounting protrusion and the mounting groove 421 makes the connection between the elastic sound insulation sleeve 4 and the first connecting member 42 more convenient, thereby reducing the difficulty of assembling the elastic sound insulation sleeve 4.

[0053] As a preferred embodiment of this embodiment, Figure 5 、 Figure 7 As shown, the first connecting member 42 is annular, and the steering column 1 is circumferentially provided with a retaining groove 11 adapted to fit the first connecting member 42. The first connecting member 42 is partially located within the retaining groove 11. This arrangement, on the one hand, provides a mounting position for the first connecting member 42 via the retaining groove 11 on the steering column 1, preventing the first connecting member 42 from falling off the steering column 1 and improving the installation stability of the elastic sound insulation sleeve 4. On the other hand, when the steering column 1 is in operation, it rotates about its axis. During this rotation, because the first connecting member 42 is annular and fits within the retaining groove 11, the rotation of the steering column 1 does not cause the first connecting member 42 to move, thus ensuring the installation stability of the elastic sound insulation sleeve 4.

[0054] Preferably, the first connecting member 42 has a first part located outside the limiting groove 11 and a second part located inside the limiting groove 11, the mounting groove 421 is opened in the first part, an oil filling port is opened on the first part, and an oil outlet is opened on the second part, and the oil filling port and the oil outlet are connected through an oil filling pipeline.

[0055] By setting the oil filling port, the oil outlet and the oil filling pipeline, it is convenient for the user to inject lubricating oil into the oil filling pipeline from the oil filling port on the first part, and then enter the limiting groove 11 from the oil outlet through the oil filling pipeline, providing lubrication between the first connecting member 42 and the limiting groove 11, reducing the relative friction between the steering column 1 and the first connecting member 42 during the rotation process, improving the steering smoothness of the steering column 1 while reducing the interference effect on the first connecting member 42 during its rotation, thereby improving the installation stability of the elastic sound insulation sleeve 4.

[0056] Preferably, the oil filling port is located on the upper surface of the first portion of the first connecting member 42 corresponding to the first portion, and the oil outlet is located on the side wall of the second portion, that is, the side facing the side wall of the steering column 1 .

[0057] As a preferred embodiment of the present application, Figure 5 、 Figure 6 As shown, the second connector 5 connects the elastic sound insulation sleeve 4 to the floor 2. The floor 2 is provided with a first connection hole 21, and the second connector 5 is provided with a second connection hole 51 aligned with the first connection hole 21. The second connector 5 is connected to the floor 2 by a connecting rod that passes through the first connection hole 21 and the second connection hole 51 in sequence. The provision of the second connector 5 improves the stability of the connection between the elastic sound insulation sleeve 4 and the floor 2, thereby reducing the possibility of the elastic sound insulation sleeve 4 being misaligned due to interference from the steering column 1 or other external environment, allowing it to stably cover the avoidance hole 3 and thus stably achieve the sound insulation function.

[0058] Preferably, the first connecting hole 21 and the second connecting hole 51 are threaded holes with the same thread direction, and the connecting member is a screw. The first connecting member 42 is installed on the floor 2 by the screw fitting with the threads of the first connecting hole 21 and the second connecting hole 51.

[0059] As a preferred embodiment of this embodiment, Figure 5 As shown, the second connecting member 5 is annular and arranged along the outer periphery of the avoidance hole 3. The number of second connecting holes 51 is multiple and spaced apart. This arrangement increases the stability of the connection between the second connecting member 5 and the floor 2. The second connecting member 5 is arranged along the outer periphery of the avoidance hole 3, which facilitates the elastic sound insulation sleeve 4 installed on the second connecting member 5 to cover the avoidance hole 3.

[0060] As another preferred embodiment under this embodiment, the elastic sound insulation sleeve 4 is bonded to the second connecting member 5. Bonding the elastic sound insulation sleeve 4 to the second connecting member 5 ensures that the elastic sound insulation sleeve 4 and the second connecting member 5 have a high connection strength and facilitates the connection between the elastic sound insulation sleeve 4 and the second connecting member 5.

[0061] This embodiment does not limit the connection method between the elastic sound insulation cover and the second connecting member 5. In another embodiment, the second connecting member 5 is in the shape of an annular plate, and the elastic sound insulation cover is partially located between the second connecting member 5 and the floor 2. The second connecting member 5 is pressed together with the floor 2 to press the elastic sound insulation cover between the two to achieve fixation.

[0062] As a preferred embodiment of the present application, it also includes a dust cover (not shown in the figure) provided on the top of the elastic sound insulation sleeve 4, and the dust cover covers the steering column 1 along the circumference of the steering column 1. By providing the dust cover, it can play a certain shielding role on the steering column 1, isolate dust and debris, etc., improve the working stability of the steering column 1, and reduce the area of the steering column 1 exposed to the user's field of view. Preferably, the dust cover can be made of plastic material, which is a hollow cylindrical shape, and has holes on the top and bottom surfaces for the steering column 1 to pass through. It is installed on the top of the elastic sound insulation sleeve 4, and the top surface of the dust cover is flush with the top of the steering column 1.

[0063] As another preferred embodiment of the present application, Figure 8 As shown, the dust cover 8 is arranged outside the elastic sound insulation sleeve 4 and the steering column 1 to achieve large-scale coverage of the steering column 1 and the elastic sound insulation sleeve 4.

[0064] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0065] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0066] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A sealing device for a steering column for a vehicle, wherein the steering column passes through a clearance hole on the vehicle floor and is connected to a steering wheel and a steering gear, respectively, characterized in that: It comprises an elastic sound insulation sleeve, which is installed on the floor and covers the avoidance hole. The elastic sound insulation sleeve is provided with a through hole for the steering column to pass through, and the elastic sound insulation sleeve is connected to the steering column along the circumference of the steering column.

2. The vehicle steering column sealing device according to claim 1, characterized in that: The elastic sound insulation sleeve includes a first sleeve body located above the floor, and the first sleeve body is bent to form a plurality of sound-absorbing recesses that are recessed toward the steering column.

3. The vehicle steering column sealing device according to claim 2, characterized in that: The elastic sound insulation sleeve also includes a second sleeve body located above the avoidance hole, one end of the second sleeve body is connected to the first sleeve body, and the other end extends horizontally toward the direction close to the steering column and abuts against the steering column.

4. The vehicle steering column sealing device according to claim 1, characterized in that: The elastic sound insulation sleeve includes a sleeve body and a first connecting member arranged at the through hole, the first connecting member connects the sleeve body to the steering column, a plurality of mounting grooves are provided on the first connecting member, and the sleeve body is provided with mounting protrusions at the through hole that are equal to and adapted to the mounting grooves, and the mounting protrusions are interference fit with the mounting grooves.

5. The vehicle steering column sealing device according to claim 4, characterized in that: The first connecting member is annular, and the steering column is provided with a limiting groove adapted to the first connecting member along the circumferential direction, and the first connecting member is partially located in the limiting groove.

6. The vehicle steering column sealing device according to claim 5, characterized in that: The first connecting member has a first portion located outside the limiting groove and a second portion located inside the limiting groove. The mounting groove is opened in the first portion. An oil filling port is opened on the first portion. An oil outlet is opened on the second portion. The oil filling port and the oil outlet are connected through an oil filling pipeline.

7. The vehicle steering column sealing device according to claim 1, characterized in that: It also includes a second connecting piece connecting the elastic sound insulation sleeve to the floor, the floor is provided with a first connecting hole, and the second connecting piece is provided with a second connecting hole aligned with the first connecting hole, and the connection between the second connecting piece and the floor is achieved by sequentially passing a connecting rod through the first connecting hole and the second connecting hole.

8. The vehicle steering column sealing device according to claim 7, characterized in that: The second connecting member is annular and is arranged along the outer circumference of the avoidance hole. There are multiple second connecting holes and they are arranged at intervals.

9. The vehicle steering column sealing device according to claim 7, characterized in that: The elastic sound insulation sleeve is bonded to the second connecting member.

10. The vehicle steering column sealing device according to claim 1, characterized in that: It also includes a dust cover arranged on the top of the elastic sound insulation sleeve, and the dust cover covers the steering column along the circumference of the steering column.

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