KR100380362B1 - Impact Absorbing Apparatus of Hood for Car - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorber of a hood for an automobile, and when a frontal collision between a vehicle and a pedestrian, a body part (particularly, a head) of the pedestrian hits the hood side. The purpose is to minimize the pedestrian injury in the event of a collision by being able to be deformed and buffered. The present invention to achieve the above object is a tension spring provided with a predetermined distance between the outer panel and the inner panel to pull the outer panel downward; A catching jaw fixed to a bottom of the outer panel at a predetermined interval; A support lever provided on the bottom surface of the outer panel to be rotated at a predetermined interval and coupled to the locking jaw to maintain a constant gap between the outer panel and the inner panel; An elastic member provided on an upper surface of the inner panel and extending upward to rotate the support lever; A rotatable lever rotatably installed at an upper side of the inner panel and fixed to the elastic member so as to maintain a compressed state of the elastic member; It is rotatably installed on the bottom surface of the outer panel and consists of an impact sensing lever for rotating the rotation lever when a predetermined shock is applied to the upper surface of the outer panel.

Description

Impact Absorbing Apparatus of Hood for Car}

The present invention relates to an impact shock absorber of a hood for an automobile, and in particular, when the vehicle is struck by a pedestrian in front of the body part (particularly, the head) of the pedestrian hits the hood side by configuring the hood to be deformed downward simultaneously with the collision. The present invention relates to minimizing the impact force transmitted to pedestrians when colliding with a vehicle, thereby protecting pedestrians more safely.

In general, the hood protects the engine in the engine room, and has a function of sound insulation, noise resistance, and pedestrian protection of engine noise. Although there is no role as a strength component of the vehicle body, it is necessary to secure the outer plate rigidity and the torsional rigidity to some extent because of the opening and closing operation. Although most steel sheets are used as materials, thinning of the steel sheet and externalizing of the resin are required in order to improve rust prevention performance and light weight.

The hood is composed of a hood panel, a hood hinge, a hood lock, a bumper rubber and a striker, and the hood panel is composed of an outer panel (outer panel), an inner panel (inner panel), and a reinforcement panel (reinforcement).

Outer panel and inner panel can be joined together by flange type and hemming type. In both systems, the outer panel has a closed cross-sectional structure together with the inner panel, so the rigidity is high and most automobiles have such a structure.

One of the most important performances required in the hood is torsional stiffness. Torsional stiffness is evaluated as a large or small amount of deformation when twisted.

If the torsional rigidity of the hood is low, that is, a large amount of deformation, and in the form of fixing only one side of the hood, which is usually used with a pedestal, a drooping phenomenon occurs to one side when the hood is opened.

In addition, the whistling feeling of opening the hood gives the body a weak feeling. In order to solve this problem, a technique of deforming the inner panel or attaching a reinforcing plate has been proposed.

When the rigidity of the hood is increased, there is a positive aspect in that the rigidity of the vehicle is improved. On the other hand, when the vehicle collides with the pedestrian in front, a part of the body of the pedestrian (particularly, the head) hits the hood side. In this case, there is a problem that gives a great impact to pedestrians.

In order to solve this problem, recently, pedestrian protection laws for safety of pedestrians such as mandatory installation of shock absorbers on the hood side have been strengthened.

1 is a perspective view showing a hood of a conventional vehicle, Figure 2 is a cross-sectional view taken along the line A-A of FIG.

1 and 2, a hood 1 is provided on the upper side of the engine room to protect the engine and the like. The hood 1 has an outer panel 2 and an outer panel 2 on the outside. Inner panel 3 is attached to the inside of the).

The inner panel 3 is bent into a predetermined shape, and a filler 4 (pad) is attached between the outer panel 2 and the inner panel 3.

However, the conventional hood has a structure in which the inner panel is fixed directly to the bottom of the outer panel through the filler, and when a part of the pedestrian's body (especially the head) hits the hood side due to a frontal collision between the vehicle and the pedestrian. The impact on the pedestrian is not effectively absorbed by the outer panel and the inner panel, causing a problem of causing serious injury to the pedestrian.

The present invention was created in order to solve the above-mentioned problems, and when a frontal collision between a vehicle and a pedestrian, a body part (particularly, a head) of the pedestrian hits the hood side. In this case, the hood is downwardly at the same time as the collision. It is an object of the present invention to provide a shock absorber of a hood for an automobile that can be pressed or deformed to be cushioned while minimizing the injury of a pedestrian during a collision between a vehicle and a pedestrian.

1 is a perspective view showing a hood of a conventional vehicle.

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

Figure 3 is a longitudinal sectional view showing a shock buffer of the hood for the vehicle according to the present invention, the state of the hood before the collision of the vehicle.

Figure 4 is a longitudinal sectional view showing the shock absorber of the hood for a vehicle according to the present invention, the state of the hood after the collision of the vehicle.

※ Explanation of symbols about main part of drawing ※

1: Hood 2: Outer Panel

3: Inner Panel 110: Tension Spring

120: engaging jaw 130: support lever

140: elastic member 141: housing

141a: Information officer 142: Slider

142a: guide protrusion 143: compression spring

150: rotation lever 160: impact detection lever

In order to achieve the above object, the present invention provides a hood for an automobile having an outer panel and an inner panel provided on the lower side of the outer panel, wherein the outer panel and the inner panel are pulled downward. Tension springs provided at predetermined intervals; A catching jaw fixed to a bottom of the outer panel at a predetermined interval; A support lever provided on the bottom surface of the outer panel to be rotated at a predetermined interval and coupled to the locking jaw to maintain a constant distance between the outer panel and the inner panel; An elastic member provided on an upper surface of the inner panel and extending upward to rotate the support lever; A rotatable lever rotatably installed on an upper side of the inner panel and fixed to the elastic member so as to maintain a compressed state of the elastic member; It is rotatably installed on the bottom of the outer panel and consists of an impact sensing lever for rotating the pivoting lever when a predetermined shock is applied to the upper surface of the outer panel.

In the above-described configuration, the elastic member is a cylindrical housing formed with guide grooves in the longitudinal direction on both sides; A slider which is installed to be movable up and down along the inside of the housing and has a guide protrusion inserted into the guide groove at an upper side thereof and a locking groove formed at a lower end thereof to lock the end of the pivoting lever; And a compression spring for elastically raising the slider upwards.

In the above-described configuration, a tension spring is provided between the outer panel and the support lever to pull upward the support lever.

Hereinafter, the shock absorber of the hood for a vehicle according to the present invention will be described in detail. In the present invention, a pair of parts is labeled with only one side for convenience.

3 is a longitudinal sectional view showing a shock absorber of a hood for a vehicle according to the present invention, showing the state of the hood before the collision of the vehicle, Figure 4 is a shock shock absorber of a hood for a vehicle according to the present invention, Is a longitudinal sectional view showing the state of the hood after a crash. In the drawings of the present invention, the left and right symmetrical parts will be given reference numerals only on one side for convenience.

3 and 4, the shock absorber 100 of the hood of the present invention is a predetermined distance between the outer panel 2 and the inner panel 3 so as to pull the outer panel 2 downward. It is provided to rotate at a predetermined interval on the tension spring 110 is provided with a predetermined interval, the locking jaw 120 is fixed to the bottom surface of the outer panel 2 at a predetermined interval, and the bottom surface of the outer panel (2). A support lever 130 coupled to the locking jaw 120 to maintain a constant distance between the outer panel 2 and the inner panel 3, and a support lever provided on an upper surface of the inner panel 3 and extending upward. An elastic member 140 for pivoting the 130 and a pivoting lever which is rotatably installed on the inner panel 3 and locked with the elastic member 140 to maintain the compressed state of the elastic member 140. 150 and the bottom of the outer panel 2 are rotatably installed and If the upper surface of the panel 2 to be a predetermined impact is applied it consists of a shock detection lever 160 for rotating the rotation lever 150.

Referring to the configuration of the shock absorber of the hood for a vehicle according to the present invention in more detail, first, the inner panel 3 is coupled to the lower side of the outer panel 2, the outer panel 2 and the inner panel 3 Between the tension spring 110 is provided with a predetermined interval therebetween. In other words, the tension spring 110 is fixed to the bracket 2a and is configured to pull the outer panel 2 downward.

A locking jaw 120 is extended to the bracket 2a at a predetermined interval, and one end of the support lever 130 is fixed to the locking jaw 120.

The support lever 130 is rotatably installed on the lower side of the bracket (2b), the tension spring 170 is fixed to the support lever 130 is configured to pull the support lever 130 upward. . Therefore, since the support lever 130 is locked to the latching jaw 120 before the collision with the pedestrian, the distance between the outer panel 2 and the inner panel 3 is kept constant, but after the collision with the pedestrian, the support lever ( 130 is removed from the locking step 120 is the gap between the outer panel 2 and the inner panel 3 is to be narrowed.

The housing 141 is vertically positioned between the support levers 130, and a slider 142 is provided to move upward and downward inside the housing 141, and a compression spring is provided below the slider 142. 143 is provided. Guide holes 141a are formed on the outer surface of the housing 141 in the longitudinal direction, and guide protrusions 142a and locking grooves 142b are formed on the upper and lower sides of the slider 142, respectively.

Therefore, before the collision with the pedestrian, the slider 142 is located below, and the compression spring 143 is compressed by the slider 142. In order for the slider 142 to be located at the lower side, the end of the pivoting lever 150 is inserted into the locking groove 142b, and the pivoting lever 150 is pivotally coupled to the bracket 3a by a hinge 150a.

The impact detection lever 160 is pivotally installed on the bottom surface of the outer panel 2 so that the hinge 160a is rotated and the pivoting lever 150 is rotated when a predetermined shock is applied to the upper surface of the outer panel 2. Consists of.

Referring to the shock absorber of the hood for an automobile according to the present invention configured as described above are as follows.

3 shows a state of a hood before a collision of a vehicle, and when a vehicle collides with a pedestrian in this state, a part of the body of the pedestrian hits the outer panel 2, and the impact force generated at this time is applied to the outer panel 2. Pressurize downward.

As the impact is applied to a predetermined portion of the outer panel 2, the impact detection lever 160 is rotated counterclockwise around the hinge 160a, and at the same time, the rotation lever 150 is rotated clockwise.

As the rotation lever 150 is rotated, the end of the rotation lever 150 is removed from the locking groove 142b. At this time, the slider 142 is moved upward by the elastic restoring force of the compression spring 143. That is, the guide protrusion 142a of the slider 142 slides upward along the guide hole 141a. When the slider 142 is fully raised upward, the guide protrusion 142a presses the support lever 130 to rotate.

As the support lever 130 is rotated, the end of the rotation lever 150 overcomes the elastic force of the tension spring 170 and is removed from the locking jaw 120. At the same time, the outer panel 2 is pulled downward by the tension of the tension spring 110.

In this way, when the pedestrian collides with the hood, that is, the outer panel 2, the outer panel 2 is cushioned while falling or being deformed downward, so that a large impact is not transmitted to the pedestrian.

As described above, the present invention has the effect of protecting the pedestrian more safely by minimizing the impact force transmitted to the pedestrian while maintaining the rigidity of the hood.

In addition, the present invention is simple in configuration, excellent in performance, and light weight can be realized.

Claims (3)

In the hood for an automobile provided with the outer panel 2 and the inner panel 3 provided below the outer panel 2, A tension spring (110) provided at a predetermined interval between the outer panel (2) and the inner panel (3) to pull the outer panel (2) downward; A catching jaw 120 fixed to a bottom of the outer panel 2 at a predetermined interval; The support lever 130 is provided to be rotated at a predetermined interval on the bottom surface of the outer panel 2 and coupled with the locking jaw 120 to maintain a constant distance between the outer panel 2 and the inner panel 3. ; An elastic member 140 provided on an upper surface of the inner panel 3 to extend upward while rotating the support lever 130; A rotation lever 150 rotatably installed at an upper side of the inner panel 3 and engaged with the elastic member 140 to maintain a compressed state of the elastic member 140; It is installed on the bottom of the outer panel (2) rotatable and when a predetermined impact is applied to the upper surface of the outer panel (2) is characterized in that it consists of an impact detection lever 160 for rotating the pivoting lever 150 Shock absorber of the car hood. The method of claim 1, wherein the elastic member 140 A cylindrical housing 141 having guide holes 141a formed on both sides in a longitudinal direction thereof; It is installed to be movable up and down along the inside of the housing 141 and the upper side is formed with a guide protrusion (142a) is inserted into the guide hole 141a, the lower side of the locking lever is fixed to the end of the rotation lever 150 A slider 142 having a groove 142b formed therein; And Shock absorber of the hood for a vehicle, characterized in that consisting of a compression spring (143) for elastically raising the slider (142) upwards. The shock absorber of claim 1, wherein a tension spring (170) is installed between the outer panel (2) and the support lever (130) to pull upward the support lever (130). .