KR19980061312A - Shock Absorber of Steering Shaft - Google Patents

Abstract

The present invention relates to a steering apparatus of a motor vehicle, and more particularly, to a shock absorbing device of a steering shaft that absorbs a driver's shock in a collision.

The present invention is connected to the impact sensor 15, the impact sensor 15 installed in the vehicle, the through-holes are formed at both ends and the inflator installed on the upper side of the cylinder 11 coupled to the lower portion of the dash panel ( 14) is installed in the upper through-hole of the cylinder 11, the cavity is formed in the front end in the longitudinal direction, the gear is formed in the interior of the cavity and the outer side is formed with a sealing projection in contact with the inner diameter of the cylinder (11) The upper steering shaft 12 is inserted into the lower through-hole of the cylinder 11 to be fitted to the cavity of the upper steering shaft 12, and is composed of a lower steering shaft 13 having a locking jaw at the distal end thereof. It is possible to provide a shock absorbing device of the steering shaft that can reduce the driver's injury by the steering wheel in the event of a collision.

Description

Shock Absorber of Steering Shaft

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering apparatus of a motor vehicle, and more particularly, to a shock absorbing apparatus of a steering shaft that absorbs a shock of a driver during a collision.

Steering system is a device used to change the driving direction of a vehicle. Steering wheel, steering shaft, column, etc., control mechanism, worm sector type, worm sector roller type, ball nut type, variable gear ratio type, rack Steering gear mechanism such as pinion type and link mechanism composed of Pitman arm, steering link, steering knuckle, etc., and mechanical steering system to transmit the steering wheel rotation to the driving wheel through the steering gear, and to reduce power Power steering using a cylinder is used.

As a safety device for protecting a driver's body when a vehicle collides with an obstacle, a steering shaft that connects a steering wheel and a steering gear mechanism, which is an operation mechanism of a steering device, is used as a shock energy absorption safety mechanism. These safety mechanisms incorporate a collapsible steering shaft by absorbing an impact or energy to a part of the steering shaft in order to alleviate the impact when the driver collides with the steering wheel during a collision.

Conventional shock-absorbing steering shafts, which are mandatory to prevent injury to the body by the handle, are constructed by combining a steering shaft and a tubular column such that the steering shaft is pushed downward along the axial direction when the driver hits the handle. Such a collapsible steering post is used in a method using a deformation of a column and a bellows type using a deformation of a main shaft to prevent the steering shaft from rising.

There are two types of column type, mesh type and ball type. The mesh type is divided into two main shafts and connected to the column tube with plastic pins. The column is made in the shape of a net when the column is impacted. It is configured to be compressed.

The ball type divides the column into two and uses the lower column and upper column.The ball is supported by the cage at the end of the lower column and upper column, and when the impact is applied, the plastic is made between the lower column and the upper column. The steel ball supported by the cage progresses while making a groove in the column, and absorbs energy by the resistance at this time.

On the other hand, the energy-absorbing steering shaft using the main shaft deformation is composed of the main shaft divided into two and the column divided into two. The lower column and the upper column are connected to the stopper, and the stopper is primarily destroyed when the vehicle collides. The column and main wheel main shaft are compressed inside the upper column.The upper column of the upper column is destroyed during the secondary impact of the human body and steering wheel, and the upper main shaft connected to the lower main shaft by serration and bellows type tube deforms the bellows. It is configured to prevent the lift of the steering wheel by collapsing downwards.

However, the above-described shock mitigation means also has a problem in that the driver hits the steering wheel when the vehicle crashes, causing significant injury.

In order to solve this problem, it is an object of the present invention to provide a shock absorbing device of the steering shaft capable of maximally protecting a driver crashing the steering wheel by inertia during a vehicle crash.

1 is a cross-sectional view of the shock absorbing device of the steering shaft of the present invention coupled to the dash panel.

2 is a cross-sectional view taken along the line A-A of FIG.

* Description of the symbols for the main parts of the drawings *

10: dash panel 11: cylinder

12: upper steering shaft 13: lower steering shaft

14: Inflator 15: Shock detection sensor

In order to achieve the above object, the present invention provides a shock sensor installed in the front of the vehicle, the inflator is formed in the upper portion of the cylinder coupled to the lower portion of the cylinder coupled to the lower end of the cylinder connected to the impact sensor, the cylinder It is installed in the upper through hole, the cavity is formed in the longitudinal direction in the front end, the gear is formed in the interior of the cavity, the outer side of the front end of the upper steering shaft formed with a sealing projection in contact with the inner diameter of the cylinder, the cavity of the upper steering shaft It is inserted into the lower through hole of the cylinder to be engaged and provides a shock absorbing device of the steering shaft consisting of a lower steering shaft formed with a locking jaw at the front end.

Hereinafter, with reference to the accompanying drawings, a detailed description of the shock absorbing device of the steering shaft according to the present invention.

Figure 1 is a cross-sectional view of the shock absorbing device of the steering shaft of the present invention coupled to the dash panel, Figure 2 is a cross-sectional view taken along the line A-A of FIG. As shown, the shock absorbing device of the steering shaft according to the present invention is a cylinder 11, upper and lower steering shafts 12 and 13, the inflator 14 and the shock sensor 15 coupled to the dash panel 10. It is composed of

The cylinder 11 is coupled to the lower portion of the dash panel 10, and a circular through hole is formed at both ends. The upper steering shaft 12 is inserted into the through hole formed in the upper side of the cylinder 11. In addition, an inflator 14 is provided above the inside of the cylinder 11, and the ignition of the inflator 14 is caused by the impact sensor 15 installed in front of the vehicle.

As described above, the upper steering shaft 12 is inserted into a through hole formed at an upper end of the cylinder 11, and a cavity is formed in a longitudinal direction at the front end of the steering shaft inserted into the cylinder 11. . A tooth is formed in the cavity, as shown in FIG. 3, and meshes with a lower steering shaft 13 to be described later. In addition, a sealing protrusion formed to contact the inner diameter of the cylinder 11 is formed outside the tip of the steering shaft inserted into the cylinder 11.

The lower steering shaft 13 is inserted into the through hole formed in the lower end of the cylinder 11 described above, and as shown in FIG. 2, the gear is inserted into the front end of the lower steering shaft 13 inserted into the cylinder 11. Is formed.

Next, the operation of the present invention configured as described above will be described. When the collision sensor detects a collision and operates the inflator 14 installed on the upper side of the cylinder 11 when the vehicle collides, the upper steering shaft 12 moves to the lower steering shaft due to the explosion of the inflator 14. 13) will be guided downwards.

Therefore, the present invention is connected to the impact sensor 15, the impact sensor 15 installed in the front of the vehicle, the through hole is formed at both ends and the upper portion of the cylinder 11 coupled to the lower portion of the dash panel 10 Installed in the inflator 14, the upper through-hole of the cylinder 11, the cavity is formed in the longitudinal direction in the distal end, the tooth is formed in the interior of the cavity and the outer diameter of the cylinder 11 in contact with the inner diameter The upper steering shaft 12 is formed with a sealing projection, inserted into the lower through-hole of the cylinder 11 to be fitted to the cavity of the upper steering shaft 12, the front end to the lower steering shaft 13 is formed with a locking step By being configured, it is possible to provide a shock absorbing device of the steering shaft that can reduce the injuries of the driver due to the steering wheel during a vehicle crash.

Although specific embodiments of the present invention have been described in detail above, the present invention is not limited thereto, and those skilled in the art may make various changes and modifications based on the technical idea of the present invention.

Claims (1)

Impact sensor installed in front of the vehicle, the through-hole is formed at both ends while being connected to the impact sensor, the inflator is installed in the upper portion of the cylinder coupled to the lower part of the dash panel, the upper hole of the cylinder is installed in the longitudinal direction at the tip A cavity is formed, and a tooth is formed inside the cavity, and an outer side of the distal end includes an upper steering shaft having a sealing protrusion contacting the inner diameter of the cylinder, and inserted into the lower hole of the cylinder to be fitted to the cavity of the upper steering shaft. The shock absorbing device of the steering shaft is installed and is composed of a lower steering shaft formed with a locking step at the front end.