CN209126795U - Steering gear input shaft sealing device and steering gear assembly - Google Patents

Abstract

The utility model embodiment discloses a kind of turning machine input shaft seal device and turning machine assembly, it includes seal closure, the seal closure includes the cover and the first cover wall for being arranged in the cover circumferential direction, there are the sets of holes for being arranged turning machine input shaft in the cover, the second cover wall is provided in the circumferential direction of the sets of holes, second cover wall is located inside first cover wall, has the gas blanket being filled with a gas between first cover wall and the second cover wall.It can be improved soundproof effect and leakproofness performance using the utility model embodiment, to improve the mute performance of cockpit, improve passenger compartment comfort.

Description

Steering gear input shaft sealing device and steering gear assembly

technical field

The utility model relates to the technical field of automobiles, in particular to a steering gear input shaft sealing device and a steering gear assembly.

Background technique

The steering gear of an automobile is generally arranged in the engine compartment, and the steering intermediate shaft is arranged in the passenger compartment. The steering gear input shaft needs to be connected to the steering intermediate shaft through the front panel of the body to form a complete steering transmission system to realize the steering function. The input shaft of the steering gear passes through the front panel of the body, and there will inevitably be a gap between it and the front panel of the body. In order to prevent noise, dust, mud and water in the engine compartment from being introduced into the passenger compartment, it is necessary to install a steering gear input shaft sealing device between the steering gear input shaft and the front panel of the body.

At present, the steering gear input shaft sealing device mostly adopts two sealing structures: one uses an outer sealing cover; the other uses an outer sealing cover and an inner sealing cover. The sealing cover is located in the cockpit, the inner sealing cover is embedded in the outer sealing cover, the inner sealing cover and the outer sealing cover are not in direct contact, and there is a metal layer and a sound insulation layer between them.

In the process of realizing the present utility model, the inventor found that if the outer sealing cover is used, the outer sealing cover is a single-layer rubber, which has a simple structure and low sound insulation performance; The size of the input shaft is required to be high, and the assembly process of the inner seal cover is increased, which affects the tact of the production line and the assembly efficiency is low. Moreover, if the inner seal cover is not installed properly, the inner seal cover and the steering gear input shaft are prone to friction and noise, and the internal There is a risk of the sealing cover coming loose.

Utility model content

In view of this, the embodiment of the present invention proposes a steering gear input shaft sealing device and a steering gear assembly to solve the above technical problems.

An embodiment of the present invention provides a sealing device for an input shaft of a steering gear, which includes: a sealing cover, the sealing cover includes a cover and a first cover wall arranged in the circumferential direction of the cover, the cover has a sleeve on the cover A sleeve hole of the steering gear input shaft is provided, and a second cover wall is arranged on the circumference of the sleeve hole, the second cover wall is located inside the first cover wall, and the first cover wall and the second cover wall are There is a gas layer filled with gas in between.

Optionally, it also includes a sound-absorbing portion, the sound-absorbing portion is provided with a mounting hole for sleeved with the steering gear input shaft, the sound-absorbing portion is located inside the first cover wall, and the outer wall of the sound-absorbing portion is attached to the The second cover wall faces away from the inner wall of the first cover wall.

Optionally, the sound absorbing part is bonded to the second cover wall by glue.

Optionally, an end of the sound-absorbing part close to the cover is connected to a cover located between the second cover wall and the sleeve hole, and an end of the sound-absorbing part away from the cover is used to abut against the front wall of the vehicle body. board.

Optionally, the cover is concave toward the inside of the first cover wall to form a concave part for sleeved plastic connecting parts of the steering gear.

Optionally, the cover is provided with a slot for cooperating with the plastic connecting piece of the steering gear, and the slot communicates with the sleeve hole.

Optionally, reinforcing ribs are provided on the outer wall of the first cover wall.

Optionally, the number of the reinforcing ribs is multiple, and the multiple reinforcing ribs are evenly arranged along the circumferential direction of the first cover wall.

Optionally, both the sealing cover and the second cover wall are made of rubber.

The embodiment of the present invention provides a steering gear assembly, which includes the above-mentioned steering gear input shaft sealing device.

The steering gear input shaft sealing device and the steering gear assembly provided by the embodiment of the present invention are provided with a sealing cover, a second cover wall is arranged in the sealing cover, and a gas layer is arranged between the first cover wall and the second cover wall , the two-layer hood wall and a layer of gas layer form a sound insulation decoupling structure, which can improve the sound insulation effect and sealing performance compared with the single-layer sealing cover in the prior art, thereby improving the mute performance of the cockpit and improving the comfort of the passenger compartment. Compared with the use of the outer sealing cover and the inner sealing cover in the prior art, the inner sealing cover can be omitted while the high-performance sound insulation and sealing performance are ensured, the assembly efficiency can be improved, and the whole sealing caused by the inner sealing cover can be reduced. At the same time, it eliminates the noise caused by friction between the inner seal cover and the input shaft of the steering gear and the risk of loosening of the inner seal cover due to the improper installation of the inner seal cover.

Description of drawings

FIG. 1 is a schematic structural diagram of an angle of a steering gear input shaft sealing device according to an embodiment of the present invention.

2 is a schematic structural diagram of another angle of the sealing device of the steering gear input shaft according to the embodiment of the present invention.

FIG. 3 is an assembly diagram of a steering gear input shaft sealing device according to an embodiment of the present invention.

FIG. 4 is an exploded view of FIG. 3 .

Detailed ways

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Wherein the same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" ” refer to directions towards or away from the geometric center of a particular part, respectively.

Example 1

1 shows a schematic structural diagram of an angle of the steering gear input shaft sealing device according to an embodiment of the present invention, and FIG. 2 shows a structural schematic diagram of another angle of the steering gear input shaft sealing device according to an embodiment of the present utility model. As shown in FIGS. 1-2 , the sealing device for the input shaft of a steering gear provided by an embodiment of the present invention includes: a sealing cover 1 .

The sealing cover 1 includes a cover cover 12 and a first cover wall 11 arranged in the circumferential direction of the cover cover 12 .

The cover 12 has a sleeve hole 121 on which the input shaft 32 of the steering gear is sleeved, and a second cover wall 13 is disposed in the circumferential direction of the sleeve hole 121 .

The second cover wall 13 is located in the first cover wall 11 , and the two cover walls are substantially parallel. As shown in FIG. 1 , the two cover walls are substantially trumpet-shaped, and the inner diameter of each cover wall gradually increases as the distance away from the cover 12 increases.

In a preferred embodiment of the present invention, the inner diameter of one end of the second cover wall 13 close to the cover 12 is larger than the inner diameter of the sleeve hole 121 .

There is a gas layer 14 filled with gas between the first cover wall 11 and the second cover wall 13 . In this embodiment, the gas is air to reduce cost.

When using the steering gear input shaft sealing device, as shown in Figure 3-4, first pass the sealing cover 1 through the steering gear input shaft 32 of the steering gear 3, and then assemble it onto the steering gear plastic connector 31. Then, the steering gear input shaft 32 is inserted into the body dash panel 2 , so that the sealing cover 1 is pressed against the body dash panel 2 .

The noise passes through the first cover wall 11, the gas layer 14, and the second cover wall 13, which greatly reduces the energy of the noise and improves the noise reduction effect.

The steering gear input shaft sealing device provided by the embodiment of the present invention is provided with a sealing cover, a second cover wall is arranged in the sealing cover, and a gas layer is arranged between the first cover wall and the second cover wall. A layer of gas layer is added to form a sound insulation decoupling structure. Compared with the single-layer sealing cover in the prior art, the sound insulation effect and sealing performance can be improved, thereby improving the mute performance of the cockpit and improving the comfort of the passenger cabin. Compared with the prior art The outer sealing cover and the inner sealing cover are used together to ensure high-performance sound insulation and sealing performance, while eliminating the inner sealing cover, improving the assembly efficiency, reducing the vehicle cost caused by the inner sealing cover, and eliminating the need for The friction between the inner seal cover and the steering gear input shaft causes noise and the risk of loosening of the inner seal cover due to the improper installation of the inner seal cover.

Embodiment 2

On the basis of the first embodiment above, optionally, as shown in FIG. 1 , the sealing device for the input shaft of the steering gear further includes a sound absorption portion 15 .

The sound-absorbing portion 15 is provided with a mounting hole 16 for sleeved with the steering gear input shaft, the sound-absorbing portion 15 is located inside the first cover wall 13 , and the sound-absorbing portion 15 is attached to the second cover wall 13 away from on the inner wall of the first cover wall 11 .

After the noise passes through the first cover wall 11, the gas layer 14 and the third cover wall 13, the sound is absorbed by the sound absorption part 15, and the noise passes through the four-layer structure, the energy is greatly reduced, and the sound insulation effect can be further improved.

Preferably, the sound absorbing part 15 is bonded to the second cover wall 13 by glue, so as to reduce the cost.

Further, the end of the sound-absorbing portion 15 close to the cover 12 is connected to the cover 12 located between the second cover wall 13 and the sleeve hole 121 , and the end of the sound-absorbing portion 15 away from the cover 12 is used for Abuts on the front panel 2 of the body.

In a preferred embodiment of the present invention, the material of the sound-absorbing portion 15 is PU foam material (Polyurethane, polyurethane) to reduce the production cost.

Preferably, as shown in FIG. 2 , the cover 12 is recessed toward the inside of the first cover wall 11 to form a recess.

The plastic connecting piece 31 of the steering gear is embedded in the concave portion, which can improve the tightness of the sealing cover 1 and the plastic connecting piece 31 of the steering gear, and further improve the sealing performance and the sound insulation performance.

As shown in FIG. 2 , the concave portion is also roughly trumpet-shaped, and the width from the bottom of the concave portion to the inlet gradually increases to facilitate the assembly of the steering gear plastic connector 31 .

Further, the cover 12 is provided with a slot 122 for matching with the plastic connecting piece 31 of the steering gear, and the slot 122 communicates with the sleeve hole 121 .

By arranging the slot 122 , the installation of the sealing cover 1 can be positioned to ensure the accuracy of the installation position of the sealing cover 1 .

Preferably, a reinforcing rib 17 is provided on the outer wall of the first cover wall 11 away from the second cover wall 13 to increase the strength of the first cover wall 11 .

Further, the number of the reinforcing ribs 17 is multiple, and the plurality of the reinforcing ribs 17 are evenly arranged along the circumferential direction of the first cover wall 11, which can not only further improve the strength of the first cover wall 11, but also It can ensure that the strengths of all parts of the first cover wall 11 are equal, and at the same time, the arrangement of the reinforcing ribs 17 can also be facilitated.

Preferably, the sealing cover 1 and the second cover wall 13 are made of rubber, so as to further reduce the production cost.

In this embodiment, the sealing device of the steering gear input shaft can be integrally formed to further reduce the production cost.

Embodiment 3

The embodiment of the present invention also provides a steering gear assembly, as shown in FIGS. 3-4 , which includes the steering gear input shaft sealing device as in the first embodiment or the second embodiment.

In the steering gear assembly provided by the embodiment of the present invention, a sealing cover is arranged, a second cover wall is arranged in the sealing cover, and a gas layer is arranged between the first cover wall and the second cover wall, and the two cover walls add one The layer of gas layer forms a sound insulation decoupling structure, which can improve the sound insulation effect and sealing performance compared with the prior art only using the outer sealing cover, thereby improving the cockpit mute performance and improving the comfort of the passenger compartment. Using the outer sealing cover and the inner sealing cover, while ensuring high-performance sound insulation and sealing performance, saves the inner sealing cover, reduces the vehicle cost caused by the inner sealing cover, and eliminates the problem caused by the improper installation of the inner sealing cover. The friction between the inner seal cover of the steering gear and the input shaft of the steering gear produces noise and the risk of loosening of the inner seal cover.

Above, the technical solutions of the present invention are described in detail with reference to the specific embodiments, and the described specific embodiments are used to help understand the idea of the present invention. Deductions and modifications made by those skilled in the art on the basis of the specific embodiments of the present invention also fall within the protection scope of the present invention.

Claims (10)

1. a kind of turning machine input shaft seal device characterized by comprising seal closure, the seal closure include the cover and set The first cover wall in the cover circumferential direction is set, there are the sets of holes for being arranged turning machine input shaft in the cover, the sets of holes The second cover wall is provided in circumferential direction, second cover wall is located inside first cover wall, first cover wall and the second cover wall Between there is the gas blanket that is filled with a gas.

2. turning machine input shaft seal device as described in claim 1, which is characterized in that it further include sound-absorbing part, the sound-absorbing The mounting hole for being arranged turning machine input shaft is provided in portion, the sound-absorbing part is located inside the first cover wall, and the sound-absorbing The outer wall in portion is fitted in second cover wall on the inner wall of first cover wall.

3. turning machine input shaft seal device as claimed in claim 2, which is characterized in that the sound-absorbing part is bonded using glue In second cover wall.

4. turning machine input shaft seal device as claimed in claim 2, which is characterized in that the sound-absorbing part is close to the cover One end and the cover between the second cover wall and sets of holes connect, the sound-absorbing part far from one end of the cover be used for against On body dash board.

5. turning machine input shaft seal device as described in claim 1, which is characterized in that the cover is covered towards described first Pars intramuralis recess, forms the recessed portion for being arranged turning machine plastic fastening.

6. turning machine input shaft seal device as described in claim 1, which is characterized in that be provided in the cover for The fluting of turning machine plastic fastening cooperation, the fluting are connected to sets of holes.

7. turning machine input shaft seal device as described in claim 1, which is characterized in that set on the outer wall of first cover wall It is equipped with reinforcing rib.

8. turning machine input shaft seal device as claimed in claim 7, which is characterized in that the quantity of the reinforcing rib is more It is a, circumferential uniformly arrangement of multiple reinforcing ribs along first cover wall.

9. turning machine input shaft seal device a method as claimed in any one of claims 1-8, which is characterized in that the seal closure and second The material of cover wall is rubber.

10. a kind of turning machine assembly, which is characterized in that input sealing including the turning machine as described in claim 1-9 is any Device.