KR20070079395A - Structure for assembing rubber boot of an intermediate steering shaft - Google Patents

Abstract

A structure for assembling a rubber boot of an intermediate steering shaft is provided to reduce side force generated during an assembling process by supporting a driving shaft with constant force. A boot assembling structure of an intermediate steering shaft comprises a rubber boot(10) and a circular tube(20). The rubber boot(10) is provided at an outer peripheral surface of a driving shaft(30). A groove(11) is formed at an inner peripheral surface of the rubber boot(10). The circular tube(20) closely adheres to the groove(11) of the rubber boot(10) and the outer peripheral surface of the driving shaft(30). The circular tube(20) has a ring shaft and is formed therein with a hollow section(20a). The circular tube(20) is press-fitted between the driving shaft(30) and the groove(11) of the rubber boot(10).

Description

Structure for Assembing Rubber Boot of an Intermediate Steering Shaft

1 is a perspective view illustrating main parts of a steering apparatus according to the related art.

Figure 2 is a plan view schematically showing an intermediate shaft according to the prior art.

3 is a plan view and a side view showing a rubber boot of an intermediate shaft according to the prior art.

4 is a side cross-sectional view showing a rubber boot of an intermediate shaft according to the prior art.

Figure 5 is a side cross-sectional view showing the assembly structure of the rubber boot and bearing of the intermediate shaft according to the prior art.

Figure 6 is a plan view and side view showing a bearing of an intermediate shaft according to the prior art.

7 is a plan view schematically showing an intermediate shaft according to an embodiment of the present invention.

8 is a side cross-sectional view schematically showing a rubber boot of an intermediate shaft according to an embodiment of the present invention.

9 is a plan view and a side cross-sectional view schematically showing a circular tube according to an embodiment of the present invention.

10 is a side cross-sectional view schematically showing a rubber boot assembly structure of an intermediate shaft according to an embodiment of the present invention.

11 is a perspective view schematically showing a circular tube according to another embodiment of the present invention.

12 is a plan view and side cross-sectional view schematically showing a circular tube according to another embodiment of the present invention.

Figure 13 is a plan view and a side cross-sectional view schematically showing a circular tube according to another embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

10: rubber boot 11: groove

20: round tube 20a: hollow part

20b: Vent hole 20c: Lip

20d: groove 30: drive shaft

The present invention relates to an assembly structure of an intermediate shaft that transmits a steering force of a steering wheel to a steering gear and a rubber boot that blocks interior and exterior, and more particularly, is provided at a predetermined position on an outer circumferential surface of a drive shaft provided to rotate. A rubber boot having grooves formed on an inner circumferential surface thereof; A circular tube in close contact with the groove of the rubber boot and the outer circumferential surface of the drive shaft and formed in a substantially ring shape, the inside of which is completely closed and includes a hollow portion in which air is inserted; And the circular tube is compressed and assembled at a predetermined pressure between the drive shaft and the groove of the rubber boot, so that even if the drive shaft is pushed in one direction by the side force generated during assembly, Due to the elasticity, air is pushed to the other side, and the drive shaft can be supported by the same force at all times, thereby reducing the side force, thereby reducing the noise and abrasion from the outside. It is about.

In general, a car is equipped with a steering system (steering system) for adjusting the direction of the wheel to control the direction of movement of the car, the steering device as described above is a manual steering device that obtains steering power purely by the driver's power And a motorized steering unit with a separate power unit to assist the driver in steering.

The most basic concept of operation of the steering apparatus as described above is to operate the steering wheel 111 of the vehicle as shown in Figure 1 so that the direction of travel of the vehicle is determined by the rotation of the wheel by rotating the knuckle to which the tire is connected It is.

That is, when the steering wheel 111 is rotated, the steering shaft 115 connected with the steering column 113 is rotated and the steering gear 117 connected to the steering shaft 115 is operated. By moving the tie rod 119 by rotating the knuckle connected to the tie rod 119 is to rotate the tire.

Here, the power steering device is configured to connect a separate hydraulic device to the basic configuration as described above to double the steering force provided by the driver through the steering wheel 111 and the steering shaft 115 to transmit to the knuckle.

As described above, the steering device is a steering wheel 111 and the steering shaft 115 are used as a component for transmitting the driver's operating force to the steering device, both manual and power type, the steering shaft 115 is a driver It connects the located driver's seat and the components under the driver's seat where the actual steering action takes place and delivers the steering power provided by the driver.

Therefore, the steering shaft 115 as described above is in a state other than the driver's seat in a state in which the state of the steering wheel 111 installed in the driver's seat is most suitable for the driver, that is, the installation angle and the degree of protrusion are made easy to drive. In order to maintain proper rotational torque transmission state between the other steering device components installed at the position of, it is possible to transmit the refracted rotational force by having a divided structure instead of being manufactured integrally.

FIG. 2 illustrates an intermediate shaft according to the related art, and blocks interior and exterior of an intermediate shaft 120 having a larger diameter at both ends than a central portion thereof, and a vehicle body through which the intermediate shaft 120 passes. It is made of a structure in which the bearing 123 is installed between the rubber boot 121 to prevent the inflow of noise and other foreign matters introduced into the room.

3 to 5, the bearing hole 121b through which the intermediate shaft 120 passes is formed in the center of the rubber boot 121, and the bearing 123 is coupled to the inner circumferential surface thereof. The locking groove 121a is formed, and an outer circumferential surface is integrally formed with a clamping plate for fixing to the vehicle body.

In particular, the bearing 123 has a cylindrical shape as shown in FIG. 6, and locking jaws 123a protruding outwardly are formed at both end portions thereof so as to be coupled to the bearing holes 121b of the rubber boot 121.

In the bearing assembly structure according to the prior art as described above, the rubber boot is mainly made of rubber, the bearing is made of plastic, and the assembly position of the intermediate shaft is influenced by the body, the steering column, and the steering gear. Will fluctuate accordingly.

However, the bearing fixed by the rubber boot is subjected to side force by the intermediate shaft, which causes a problem such as noise and excessive wear.

Accordingly, the present invention is to solve the above problems, the rubber boot is provided at a predetermined position on the outer circumferential surface of the drive shaft provided to rotate the rubber boot formed with a groove on the inner circumferential surface; A circular tube in close contact with the groove of the rubber boot and the outer circumferential surface of the drive shaft and formed in a substantially ring shape, the inside of which is completely closed and includes a hollow portion in which air is inserted; And the circular tube is compressed and assembled at a predetermined pressure between the drive shaft and the groove of the rubber boot, so that even if the drive shaft is pushed in one direction by the side force generated during assembly, Due to the elasticity of the air is pushed to the other side can always support the drive shaft with the same force to reduce the side force to reduce the noise and wear introduced from the outside of the intermediate shaft boot assembly structure The purpose is to provide.

The present invention relates to an assembly structure of an intermediate shaft that transmits a steering force of a steering wheel to a steering gear and a rubber boot that blocks interior and exterior, and more particularly, is provided at a predetermined position on an outer circumferential surface of a drive shaft provided to rotate. A rubber boot having grooves formed on an inner circumferential surface thereof; A circular tube in close contact with the groove of the rubber boot and the outer circumferential surface of the drive shaft and formed in a substantially ring shape, the inside of which is completely closed and includes a hollow portion in which air is inserted; The circular tube is compressed and assembled at a predetermined pressure between the drive shaft and the groove of the rubber boot.

It is possible to insert oil or the like in addition to air in the completely sealed hollow part of the round tube made of rubber (rubber), and in another embodiment, a round tube to easily insert air or oil in the completely sealed hollow part of the round tube The vent hole portion is further formed at an outer circumferential predetermined position.

One or more grooves formed on the inner circumferential surface of the rubber boot may be formed, and may further include a number of circular tubes corresponding to the number of grooves, and the cross section of the circular tube may be formed in various shapes such as triangular or square. It is done.

In another embodiment, the inner circumferential surface of the circular tube in close contact with the outer circumferential surface of the drive shaft to form a lip integrally protruding in the central direction, characterized in that one or more lip can be formed.

In another embodiment, a groove having a predetermined depth is further formed on the inner circumferential surface of the circular tube in close contact with the outer circumferential surface of the drive shaft, and one or more grooves may be formed.

Hereinafter, an embodiment of the present invention will be described in more detail based on the accompanying drawings.

7 is a plan view schematically showing the intermediate shaft according to an embodiment of the present invention, Figure 8 is a side cross-sectional view schematically showing a rubber boot of the intermediate shaft according to an embodiment of the present invention, Figure 9 Is a plan view and a side cross-sectional view schematically showing a circular tube according to an embodiment of the present invention, Figure 10 is a side cross-sectional view schematically showing a rubber boot assembly structure of the intermediate shaft according to an embodiment of the present invention, 11 is a perspective view schematically showing a circular tube according to another embodiment of the present invention, Figure 12 is a plan view and a side cross-sectional view schematically showing a circular tube according to another embodiment of the present invention, and Figure 13 is a Top and side cross-sectional views schematically showing a circular tube according to another embodiment.

The boot assembly structure of the intermediate shaft according to the present invention is provided at a predetermined position on the outer circumferential surface of the drive shaft 30 of the intermediate shaft, which is provided to rotate, as shown in FIGS. 7 to 10. A rubber boot 10 in which the 11 is formed; A circular tube 20 which is in close contact with the groove 11 of the rubber boot 10 and the outer circumferential surface of the drive shaft 30 and is formed in a substantially ring shape, and has a hollow portion 20a in which the air is completely sealed and inserted therein. )in; The circular tube 20 is compressed and assembled at a predetermined pressure between the drive shaft 30 and the groove 11 of the rubber boot 10.

At this time, the rubber boot 10 is provided on the outer circumferential surface of the drive shaft 30 to block the interior and exterior of the vehicle body to prevent the inflow of noise and other foreign substances from the outside of the vehicle, the rubber boot 10 In the groove 11 formed on the inner circumferential surface of the rubber (rubber) material is provided so that the circular tube 20 is seated.

And, as the drive shaft 30 is assembled, the circular tube 20 is compressed and assembled so that its cross section is deformed into an elliptical shape by a constant pressure by the outer circumferential surface of the drive shaft 30, so that a side force generated during assembly Even if the drive shaft 30 is pushed in one direction due to the force), the air is pushed to the other side by the elasticity of the flowable air inserted in the circular tube 20 so that the drive shaft 30 can always be supported by the same force. There is an advantage that can reduce the side force to reduce the noise and wear introduced from the outside.

In addition, the present invention configured as described above can eliminate the conventional bearing has the advantage of cost reduction according to the reduction of the number of parts.

In this case, one or more grooves 11 formed on the inner circumferential surface of the rubber boot 10 may be formed in a plurality, and the number of round tubes 20 corresponding to the number of the grooves 11 may be further provided. In addition to reducing the force to reduce noise and abrasion from the outside, there is an advantage that can maintain the amount of grease and reduce the rate of the grease (grease) applied to the intermediate shaft.

In addition, the cross section of the circular tube 20 can be formed in various shapes such as triangular or square.

On the other hand, in one embodiment of the present invention is shown that the air is inserted into the completely closed hollow portion 20a of the circular tube 20, in addition to the air (oil), etc. can be inserted into the hollow portion (20a) By inserting air or oil into the air, there is an advantage that can increase the elastic force of the circular tube 20 filled with air or oil.

In addition, as another embodiment of the present invention, as shown in Figure 11, the circular tube 20 of the circular tube 20 so as to be able to easily insert air or oil, etc. in the completely closed hollow portion (20a) It is preferable to form a vent hole at a predetermined position on the outer circumferential surface to further form a vent hole portion 20b into which air or oil can be inserted through the vent hole.

And, as another embodiment of the present invention, as shown in Figure 12, the lip (20c) integrally protruding in the center direction integrally with the inner peripheral surface of the circular tube 20 in close contact with the outer peripheral surface of the drive shaft (30) It is more formable, and the lip 20c may be formed in one or more pieces.

By forming the lip 20c integrally with the inner circumferential surface of the circular tube 20, there is an advantage in that the amount of grease can be maintained and the reduction rate can be reduced when grease is applied.

In addition, as another embodiment of the present invention, as shown in Figure 13, the groove 20d of a predetermined depth can be further formed on the inner peripheral surface of the circular tube 20 in close contact with the outer peripheral surface of the drive shaft 30 In addition, since the groove 20d may be formed in one or more pieces, the amount of grease may be maintained and the reduction rate may be reduced.

Therefore, as described above, the present invention includes a rubber boot provided at a predetermined position on an outer circumferential surface of a drive shaft provided to rotate, and having a groove formed on an inner circumferential surface thereof; A circular tube in close contact with the groove of the rubber boot and the outer circumferential surface of the drive shaft and formed in a substantially ring shape, the inside of which is completely closed and includes a hollow portion in which air is inserted; The circular tube is compressed and assembled at a predetermined pressure between the drive shaft and the groove of the rubber boot, so that the flow inserted into the round tube made of rubber is made even though the drive shaft is pushed in one direction by the side force generated during assembly. Air is pushed to the other side by the elasticity of the air possible to support the drive shaft with the same force at all times to reduce the side force has the advantage of reducing the noise and wear from the outside.

In addition to air, oil or the like can be inserted into the completely closed hollow portion of the round tube made of rubber, and in another embodiment, a vent hole is formed at a predetermined position of the round tube, so that air or oil can be more easily formed in the hollow portion. It is possible to insert a round tube filled with air or oil, etc. to have a greater elastic force.

In another embodiment, the inner circumferential surface of the circular tube in close contact with the outer circumferential surface of the drive shaft is further formed integrally with the lip protruding in the central direction, and the lip may be formed of one or more plural, and the amount of grease by the formed lip There is an advantage that can maintain and reduce the rate of reduction.

In another embodiment, a groove having a predetermined depth is further formed on an inner circumferential surface of a circular tube in close contact with an outer circumferential surface of a drive shaft, and one or more grooves may be formed, and the grooves formed may maintain and reduce the amount of grease. There is an advantage that can be reduced.

As described above, the present invention includes a rubber boot provided at a predetermined position on the outer circumferential surface of the drive shaft provided to rotate, and having a groove formed on the inner circumferential surface thereof; A circular tube in close contact with the groove of the rubber boot and the outer circumferential surface of the drive shaft and formed in a substantially ring shape, the inside of which is completely sealed and including a hollow portion into which air is inserted; And the circular tube is compressed and assembled between the drive shaft and the groove of the rubber boot by a predetermined pressure, so that the flow inserted into the round tube made of rubber is made even though the drive shaft is pushed to one side by side force generated during assembly. Air is pushed to the other side by the elasticity of the air as much as possible, and can always support the drive shaft with the same force, thereby reducing side force, thereby reducing noise and wear from the outside.

In addition to air, oil or the like can be inserted into the completely closed hollow portion of the round tube made of rubber, and in another embodiment, a vent hole is formed at a predetermined position of the round tube, so that air or oil can be more easily formed in the hollow portion. It is possible to insert such that the round tube filled with air or oil can have a greater elastic force.

In another embodiment, the inner circumferential surface of the circular tube in close contact with the outer circumferential surface of the drive shaft is further formed integrally with the lip protruding in the central direction, and the lip may be formed of one or more plural, and the amount of grease by the formed lip There is an effect that can maintain and reduce the rate of reduction.

In another embodiment, a groove having a predetermined depth is further formed on an inner circumferential surface of a circular tube in close contact with an outer circumferential surface of a drive shaft, and one or more grooves may be formed, and the grooves formed may maintain and reduce the amount of grease. There is an effect that can be reduced.

Although the present invention has been shown and described with respect to particular embodiments, it is well known in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the accompanying Utility Model Claims. Anyone who owns it can easily find out.

Claims (11)

A rubber boot 10 provided at a predetermined position on an outer circumferential surface of the drive shaft 30 provided to rotate, and having a groove 11 formed on an inner circumferential surface thereof; A circular tube 20 which is in close contact with the groove 11 of the rubber boot 10 and the outer circumferential surface of the drive shaft 30 and is formed in a substantially ring shape, and has a hollow portion 20a in which the air is completely sealed and inserted therein. )in; Boot assembly structure of the intermediate shaft, characterized in that the circular tube 20 is compressed and assembled between the drive shaft (30) and the groove (11) of the rubber boot (10) at a predetermined pressure. The boot assembly structure of the intermediate shaft according to claim 1, wherein the circular tube is made of rubber. 3. The boot assembly structure of an intermediate shaft according to claim 1 or 2, wherein oil or the like can be inserted into the completely sealed hollow portion (20a) of the circular tube (20). The vent hole 20b according to claim 1 or 3, wherein the vent hole 20b is positioned at an outer circumferential predetermined position of the circular tube 20 so that air or oil can be easily inserted into the completely closed hollow portion 20a of the circular tube 20. Boot assembly structure of the intermediate shaft, characterized in that it further forms). The boot assembly structure of an intermediate shaft according to claim 1 or 3, wherein one or more grooves (11) formed on the inner circumferential surface of the rubber boot (10) can be further formed. 6. The boot assembly structure of an intermediate shaft according to claim 5, further comprising a number of circular tubes (20) corresponding to the number of grooves (11) of the rubber boot (10). The boot assembly structure of the intermediate shaft according to claim 1 or 6, wherein the cross section of the circular tube (20) can be formed into various shapes such as a triangular or square shape. 8. The intermediary according to claim 1 or 7, further comprising a lip (20c) protruding in a central direction integrally with the inner circumferential surface of the circular tube 20 in close contact with the outer circumferential surface of the drive shaft (30). Assembly structure of the shaft. The boot assembly structure of an intermediate shaft according to claim 8, wherein at least one lip (20c) integrally formed on the inner circumferential surface of the circular tube (20c) is formed. 8. The boot of an intermediate shaft according to claim 1, wherein a groove 20d having a predetermined depth is further formed on an inner circumferential surface of the circular tube 20 in close contact with an outer circumferential surface of the drive shaft 30. Assembly structure. 11. The boot assembly structure of an intermediate shaft according to claim 10, wherein one or more grooves (20d) formed on the inner circumferential surface of the circular tube (20) can be formed.

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