KR100996125B1 - Variable shock-absorption structure of steering system - Google Patents

Abstract

According to the present invention, a variable impact energy absorption of a vehicle steering apparatus for absorbing shock energy suitable for a collision situation according to various collision conditions such as vehicle speed, driver condition, collision condition, etc. before a collision and a collision accident of a vehicle is achieved. It's about structure.

The technical configuration, in the shock energy absorbing structure of the vehicle steering apparatus, a fixing pin (80) which is installed at any one of the steering column tube 10 and the mounting bracket 40; It has a movable pin 92 disposed to face the fixed pin 80, the movable pin 92 is made so that the stroke is variable according to the collision situation of the vehicle based on the information calculated from the sensors of the vehicle. Actuator 90; One end is bolted to the vehicle body and the center portion thereof is press-fitted between the fixing pin 80 and the movable pin 92 of the actuator 90 so that the pins 80 and 92 are separated by the collision inertia during a vehicle crash. It is intended to include a bending plate 70 provided to absorb the impact energy while passing through.

Mounting Bracket, Variable Energy Absorption, Bending Plate, Actuator

Description

Variable shock-absorption structure of steering system

1 is a perspective view showing a conventional steering device.

Figure 2 is an enlarged perspective view of a mounting bracket having a shock absorbing structure according to FIG.

Figure 3 is an exploded perspective view of the device showing a variable impact energy absorption structure according to the present invention.

4 is an enlarged perspective view of the main part extracting the main part according to FIG. 3;

5 and 6 is an operating state diagram showing the operation of the variable impact energy absorption structure of the present invention in a vehicle crash or crash.

Figure 7 is a reference diagram showing a variable stroke state of the actuator movable pin applied to the present invention.

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

40.Mounting bracket 50.Capsule

70 ... bending plate 72 ... bolting ball

74.Bending side 80 ... Fixing pin

90 ... actuator 92 ... actuating pin

The present invention relates to a variable shock energy absorbing structure of a vehicle steering apparatus, which is particularly effective in absorbing impact loads generated differently depending on a collision situation, that is, a vehicle speed, a driver condition, a collision condition before a collision and a collision accident of a vehicle. The present invention relates to a variable shock energy absorbing structure of a steering device to further improve driver safety from a vehicle crash.

In general, the driver's seat of the vehicle is provided with a steering device for allowing the driver to arbitrarily change the direction of travel of the vehicle.

Such a steering apparatus typically includes a steering apparatus, a steering gear, and a link mechanism. In particular, the steering apparatus includes a steering wheel that receives rotational torque from a driver, a shaft connected to the steering wheel, and a state in which the shaft is inserted. The steering column is fixed to the vehicle body by a pair of upper lower mounting brackets.

Here, the steering device as described above is provided with a variety of shock energy absorbing structure to minimize the driver's injury by absorbing and mitigating the impact force when the driver hits the steering device due to collision inertia during vehicle collision or collision.

As the impact energy absorbing structure, a structure for absorbing a shock due to deformation of a steering column tube and a shock absorbing structure due to a shock deformation of a steering shaft inserted into the steering column tube are generally used in parallel. In order to further more effectively absorb shock, the shock absorber is provided to a mounting bracket for fixing the steering column to the vehicle body to minimize injury to the driver.

1 is a perspective view showing a conventional steering device having an impact energy absorbing structure, as shown in the end of the inner tube (1b) inside the hollow tube-shaped outer tube (1a) end is inserted into the retractable steering A column 1 is provided and a steering shaft 2 connected to a steering wheel (not shown) is installed inside the steering column 1, and such a steering shaft 2 also has a shaft like the steering column 1. It is provided to be able to contract in the direction.

In addition, a mounting bracket 4 is installed at one side of the outer circumferential surface of the steering column 1 to fix the steering column to the vehicle body. Such a mounting bracket 4 also provides impact energy generated during a vehicle collision or a collision. It has a shock absorbing structure to absorb.

A typical example of the conventional mounting shock absorbing structure as described above has a configuration as shown in FIG.

That is, the capsule 5 for fixing the mounting bracket 4 to the vehicle body is detachably pinned or protruded to both sides of the mounting bracket 4, and the lower surface of the capsule 5 has a secondary impact during a vehicle collision. A curling plate 6 having a bending part 60 is bolted to the vehicle body through mounting bolts so as to absorb energy, and the bending part 60 of the curling plate 6 is mounted to the mounting bracket 4. The riveting (7) is fixed to one side and the break line 62 is formed inside.

Therefore, the mounting bracket 4 supporting the steering column 1 by the collision inertia in the case of a vehicle collision or a collision is released from the capsule 5, and thus the primary shock absorption is made, together with the capsule 5 Curing plate 6 fixed to the bottom surface is bent by the riveting point is torn by the break line 62 to absorb additional impact energy.

However, the shock energy absorbing structure of the conventional steering apparatus has been set at any time since the initial manufacture of the product, since the shock absorbing load (set bending load or torn breaking load) has been set up in various collision situations regardless of the driver's characteristics. It was always forced to absorb the same impact load. As a result, the impact energy suitable for the situation cannot be effectively absorbed in various collision situations, such as a high speed collision situation, a heavy driver's weight, or a driver's seat belt not worn. There was a lot to do.

The present invention has been made in view of the problems of the prior art as described above, the vehicle collision or collision using an actuator driven according to the operation command calculated based on the information obtained from each sensor of the vehicle. By configuring the resistance load value that resists the collision load according to the collision situation, it is possible to know the situation in various collision situations such as vehicle speed, driver condition, and collision condition before collision during vehicle collision and collision. The object of the present invention is to provide a variable shock energy absorbing structure of a steering system that can minimize the driver's injury by showing the optimal shock energy absorbing performance.

The present invention as a technical means for achieving the above object, in the impact energy absorption structure of the vehicle steering apparatus, a fixing pin which is installed on the steering column tube and the mounting bracket; An actuator configured to have a movable pin disposed to face the fixed pin, the movable pin configured to vary a stroke according to a collision situation of the vehicle based on information calculated from sensors of the vehicle; One end is bolted to the vehicle body and the center portion thereof is press-fitted between the fixing pin and the movable pin of the actuator, and includes a bending play provided to absorb impact energy while passing between the pins by the collision inertia during a vehicle crash. By providing a variable impact energy absorption structure of the steering apparatus, characterized in that configured to.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Briefly described with reference to the accompanying drawings, Figure 3 is an exploded perspective view of a device showing a variable shock energy absorbing structure according to the present invention, Figure 4 is an enlarged perspective view of the main portion extracting the main portion according to FIG.

As can be seen through the figure, the variable impact energy absorbing structure applied to the present invention, the fixed pin 80, the fixed pin 80 and the movable pin 92 disposed to face in the form of a rolling roller type It includes an actuator 90 and a bending plate 70 which is displaced while passing between the fixing pin 80 and the movable pin 92 of the actuator 90 when the vehicle collides or crashes. In particular, in the present embodiment, the fixing pin 80 is disclosed as a structure that is installed in the mounting bracket 40, but may also be disclosed as a structure installed in the steering column tube (10).

First, the fixing pin 80 is provided to induce the displacement of the bending plate, which will be described later in the event of a vehicle collision or collision, and has sufficient rigidity for inducing displacement, and usually has a rod-shaped steering column tube having a circular cross section. It is installed on the bottom surface of the mounting bracket 40 for fixing 10 to the vehicle body.

Next, the actuator 90 is configured such that the movable pin 92 may be drawn out using a motor, a hydraulic device, a pneumatic device, or a solenoid according to an operation command input from the outside, and the movable pin 92 may be drawn out. In this case, the fixing pins 80 and the rolling rollers face each other in the up and down directions so that the bending plate 70 can be press-fitted to the mounting bracket 40 through bolts or the like.

In particular, such an actuator 90 has a variety of sensors (vehicle speed sensor, seat belt wearing presence sensor) so that the draw stroke of the movable pin 92 is controlled according to the collision situation to absorb the impact energy suitable for the situation. , Load sensors, etc.) and ECUs (electronic control units).

Meanwhile, among the components of the present invention, the bending plate 70 is press-fitted between the fixing pin 80 and the movable pin 92 of the actuator 90, so that the pins 80, due to the collision inertia, when the vehicle crashes. 92) It is displaced while passing through to absorb shock energy and has a rectangular long plate shape.

In particular, a bolting hole 72 is drilled at one side end of the bending plate 70 to be bolted to the vehicle together with the capsule 50, and a portion of both ends in the width direction is predetermined in a longitudinal center portion thereof. Bending surface 74 is bent at an angle of, so that when the vehicle collision or collision, the bending surface 74 is configured to be displaced while passing between the pins (80,92).

The variable impact energy absorbing structure of the present invention having such a configuration, as can be seen through the accompanying drawings, Figure 3, of the bending plate 70 on the bottom surface of the capsule 50 detachably assembled to one side of the mounting bracket (4) One side, that is, the bolting hole 72 is fixed to the vehicle body through a bolt or the like in a state in which the perforated portion is in close contact. At this time, in front of the capsule 50, the fixing pin 80 and the actuator movable pin 92 are arranged in the up and down rolling rollers with the bending plate 70 interposed therebetween on the mounting bracket 4. It is assembled to induce the displacement of the bending plate when the bending plate 70 is separated during a vehicle crash or collision.

When described in more detail with reference to the accompanying drawings, the operation and effects of the present invention having an assembly as described above are as follows.

5 to 6 are views illustrating an operation process of the variable impact energy absorbing structure of the present invention in a vehicle crash or a collision.

As shown in the figure, when a vehicle collision or a collision occurs, the steering column tube 10 in which a steering shaft (not shown) is built first has a relative movement (collapsing in the axial direction) and the steering column tube 10 at the same time. The mounting bracket 40 supporting the vehicle body is separated from the capsule 50 bolted to the vehicle body by the collision inertia in the direction of the arrow shown in the drawing, thereby absorbing the impact energy.

At this time, the bending plate 70 fixed to the vehicle body together with the capsule 50 is press-fitted between the fixing pin 80 and the movable pin 92 of the actuator 90 installed on the mounting bracket 40 to be separated. At this point, the displacements are displaced by the propagation at the edge to generate resistance energy suitable for the collision situation.

In detail, when a larger shock absorption is required in consideration of vehicle speed, driver condition, collision condition, etc., the ECU of the vehicle is based on information calculated from various sensors installed in the vehicle. The movable pin 92 is drawn out by applying an operation command to the movable pin 92. When the movable pin 92 is drawn out, a bending plate 70 positioned between the pins 80 is disposed between the pins 80 and 92. Pressurized as in the rolling roller method.

Accordingly, in such a situation, when the movable pin 92 and the fixing pin 80 of the actuator 90 move away from the collision inertia direction together with the mounting bracket 40, the pins 80 and 92 as shown in FIG. 6. As the bending surface 74 of the bending plate 70 is unfolded, the resistance to the impact force is doubled.

In particular, the actuator 90 as described above is configured such that the withdrawal stroke of the movable 92 pin can be adjusted according to the collision situation. For this reason, 0-2 bending surfaces 74 are selectively unrolled according to the position of the movable pin 92 which is drawn out, and the energy absorption amount can be changed.

In detail, as shown in FIG. 7, the movable pin 92 of the actuator 90 has a different stroke, such as A, B, and C, depending on its signal. When fully drawn out, two bending surfaces 74 are brought into contact with the movable pins 92 that are drawn out, and when they are drawn out halfway as in B, only one bending surface 74 is brought into contact with each other. When not drawn out at all, such as C, the bending plate 70 and the movable pin 92 do not come into contact with each other, so that the impact energy is absorbed only by the displacement of the normal steering column tube.

That is, in case of A, the largest energy is absorbed in a situation where a larger shock absorption is required in consideration of driving conditions such as a driver and a vehicle, and in the case of B, the smallest energy is absorbed in the case of C. do.

Therefore, since the displacement amount of the bending plate 70 varies according to the stroke of the movable pin 92 of the actuator 90 operating based on the information of the ECU according to the collision situation, the shock energy absorption range can be realized more widely. It becomes possible.

As described above, according to the variable impact energy absorbing structure of the steering apparatus of the present invention, when a vehicle collides or collides with a moving pin of an actuator driven according to an operation command calculated based on information obtained from each sensor of the vehicle. The value of the resistive load that resists the collision load varies according to the collision situation, and thus the optimal impact energy for the situation in various collision situations such as vehicle speed, driver conditions, and collision conditions before the collision and collision of the vehicle Absorption performance can be achieved, further improving the driver's safety from accidents.

While the invention has been shown and described with respect to specific embodiments thereof, it will be appreciated that various changes and modifications can be made in the art without departing from the spirit or scope of the invention as set forth in the following claims. It will be appreciated that those skilled in the art can easily know.

Claims (4)

Vehicle steering device configured to absorb shock energy by displacement of steering column tube due to collision inertia and collision force from vehicle body of mounting bracket that supports and fix the steering column tube in case of vehicle collision or collision In the energy absorption structure of A fixing pin (80) installed at any one of the steering column tube (10) and the mounting bracket (40); It has a movable pin 92 disposed to face the fixed pin 80, the movable pin 92 is made so that the stroke is variable according to the collision situation of the vehicle based on the information calculated from the sensors of the vehicle. Actuator 90; One end is bolted to the vehicle body and the center portion thereof is press-fitted between the fixing pin 80 and the movable pin 92 of the actuator 90 so that the pins 80 and 92 are separated by the collision inertia during a vehicle crash. Variable impact energy absorption structure of the steering device, characterized in that it comprises a bending plate 70 is provided to absorb the impact energy while passing through. The method of claim 1, The bending plate 70 has a bending surface 74 having a portion of both ends of the width direction bent over a predetermined portion of the central portion in the longitudinal direction so that displacement may occur while passing between the pins 80 and 92 during a vehicle collision or a collision. Variable impact energy absorption structure of the steering apparatus, characterized in that formed. The method of claim 1, The movable pin (92) of the actuator (90) is a variable impact energy absorption structure of the steering apparatus, characterized in that the withdrawal stroke is adjusted according to the collision situation. The method of claim 1, The actuator 90 is a variable impact energy absorption structure of the steering apparatus, characterized in that any one selected from the solenoid, motor, hydraulic device, pneumatic device.

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